diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 00000000..74eb9d74 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,27 @@ +# Build the manager binary +FROM golang:1.13 as builder + +WORKDIR /workspace +# Copy the Go Modules manifests +COPY go.mod go.mod +COPY go.sum go.sum +# cache deps before building and copying source so that we don't need to re-download as much +# and so that source changes don't invalidate our downloaded layer +RUN go mod download + +# Copy the go source +COPY main.go main.go +COPY api/ api/ +COPY controllers/ controllers/ + +# Build +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go + +# Use distroless as minimal base image to package the manager binary +# Refer to https://github.com/GoogleContainerTools/distroless for more details +FROM gcr.io/distroless/static:nonroot +WORKDIR / +COPY --from=builder /workspace/manager . +USER nonroot:nonroot + +ENTRYPOINT ["/manager"] diff --git a/Makefile b/Makefile new file mode 100644 index 00000000..5da22b5b --- /dev/null +++ b/Makefile @@ -0,0 +1,80 @@ + +# Image URL to use all building/pushing image targets +IMG ?= controller:latest +# Produce CRDs that work back to Kubernetes 1.11 (no version conversion) +CRD_OPTIONS ?= "crd:trivialVersions=true" + +# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set) +ifeq (,$(shell go env GOBIN)) +GOBIN=$(shell go env GOPATH)/bin +else +GOBIN=$(shell go env GOBIN) +endif + +all: manager + +# Run tests +test: generate fmt vet manifests + go test ./... -coverprofile cover.out + +# Build manager binary +manager: generate fmt vet + go build -o bin/manager main.go + +# Run against the configured Kubernetes cluster in ~/.kube/config +run: generate fmt vet manifests + go run ./main.go + +# Install CRDs into a cluster +install: manifests + kustomize build config/crd | kubectl apply -f - + +# Uninstall CRDs from a cluster +uninstall: manifests + kustomize build config/crd | kubectl delete -f - + +# Deploy controller in the configured Kubernetes cluster in ~/.kube/config +deploy: manifests + cd config/manager && kustomize edit set image controller=${IMG} + kustomize build config/default | kubectl apply -f - + +# Generate manifests e.g. CRD, RBAC etc. +manifests: controller-gen + $(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases + +# Run go fmt against code +fmt: + go fmt ./... + +# Run go vet against code +vet: + go vet ./... + +# Generate code +generate: controller-gen + $(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..." + +# Build the docker image +docker-build: test + docker build . -t ${IMG} + +# Push the docker image +docker-push: + docker push ${IMG} + +# find or download controller-gen +# download controller-gen if necessary +controller-gen: +ifeq (, $(shell which controller-gen)) + @{ \ + set -e ;\ + CONTROLLER_GEN_TMP_DIR=$$(mktemp -d) ;\ + cd $$CONTROLLER_GEN_TMP_DIR ;\ + go mod init tmp ;\ + go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.2.5 ;\ + rm -rf $$CONTROLLER_GEN_TMP_DIR ;\ + } +CONTROLLER_GEN=$(GOBIN)/controller-gen +else +CONTROLLER_GEN=$(shell which controller-gen) +endif diff --git a/PROJECT b/PROJECT new file mode 100644 index 00000000..1e3a7410 --- /dev/null +++ b/PROJECT @@ -0,0 +1,7 @@ +domain: k8s.io +repo: github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s +resources: +- group: bootstrap + kind: KThreesConfig + version: v1alpha1 +version: "2" diff --git a/api/v1alpha1/groupversion_info.go b/api/v1alpha1/groupversion_info.go new file mode 100644 index 00000000..053f436a --- /dev/null +++ b/api/v1alpha1/groupversion_info.go @@ -0,0 +1,36 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// Package v1alpha1 contains API Schema definitions for the bootstrap v1alpha1 API group +// +kubebuilder:object:generate=true +// +groupName=bootstrap.k8s.io +package v1alpha1 + +import ( + "k8s.io/apimachinery/pkg/runtime/schema" + "sigs.k8s.io/controller-runtime/pkg/scheme" +) + +var ( + // GroupVersion is group version used to register these objects + GroupVersion = schema.GroupVersion{Group: "bootstrap.k8s.io", Version: "v1alpha1"} + + // SchemeBuilder is used to add go types to the GroupVersionKind scheme + SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion} + + // AddToScheme adds the types in this group-version to the given scheme. + AddToScheme = SchemeBuilder.AddToScheme +) diff --git a/api/v1alpha1/kthreesconfig_types.go b/api/v1alpha1/kthreesconfig_types.go new file mode 100644 index 00000000..23ae8652 --- /dev/null +++ b/api/v1alpha1/kthreesconfig_types.go @@ -0,0 +1,85 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package v1alpha1 + +import ( + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" +) + +// EDIT THIS FILE! THIS IS SCAFFOLDING FOR YOU TO OWN! +// NOTE: json tags are required. Any new fields you add must have json tags for the fields to be serialized. + +// KThreesConfigSpec defines the desired state of KThreesConfig +type KThreesConfigSpec struct { + // INSERT ADDITIONAL SPEC FIELDS - desired state of cluster + // Important: Run "make" to regenerate code after modifying this file + + // Foo is an example field of KThreesConfig. Edit KThreesConfig_types.go to remove/update + Foo string `json:"foo,omitempty"` +} + +// KThreesConfigStatus defines the observed state of KThreesConfig +type KThreesConfigStatus struct { + // Ready indicates the BootstrapData field is ready to be consumed + Ready bool `json:"ready,omitempty"` + + BootstrapData []byte `json:"bootstrapData,omitempty"` + + // DataSecretName is the name of the secret that stores the bootstrap data script. + // +optional + DataSecretName *string `json:"dataSecretName,omitempty"` + + // FailureReason will be set on non-retryable errors + // +optional + FailureReason string `json:"failureReason,omitempty"` + + // FailureMessage will be set on non-retryable errors + // +optional + FailureMessage string `json:"failureMessage,omitempty"` + + // ObservedGeneration is the latest generation observed by the controller. + // +optional + ObservedGeneration int64 `json:"observedGeneration,omitempty"` + + // Conditions defines current service state of the KubeadmConfig. + // +optional + //Conditions clusterv1.Conditions `json:"conditions,omitempty"` +} + +// +kubebuilder:object:root=true + +// KThreesConfig is the Schema for the kthreesconfigs API +type KThreesConfig struct { + metav1.TypeMeta `json:",inline"` + metav1.ObjectMeta `json:"metadata,omitempty"` + + Spec KThreesConfigSpec `json:"spec,omitempty"` + Status KThreesConfigStatus `json:"status,omitempty"` +} + +// +kubebuilder:object:root=true + +// KThreesConfigList contains a list of KThreesConfig +type KThreesConfigList struct { + metav1.TypeMeta `json:",inline"` + metav1.ListMeta `json:"metadata,omitempty"` + Items []KThreesConfig `json:"items"` +} + +func init() { + SchemeBuilder.Register(&KThreesConfig{}, &KThreesConfigList{}) +} diff --git a/api/v1alpha1/zz_generated.deepcopy.go b/api/v1alpha1/zz_generated.deepcopy.go new file mode 100644 index 00000000..17582744 --- /dev/null +++ b/api/v1alpha1/zz_generated.deepcopy.go @@ -0,0 +1,124 @@ +// +build !ignore_autogenerated + +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// Code generated by controller-gen. DO NOT EDIT. + +package v1alpha1 + +import ( + runtime "k8s.io/apimachinery/pkg/runtime" +) + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *KThreesConfig) DeepCopyInto(out *KThreesConfig) { + *out = *in + out.TypeMeta = in.TypeMeta + in.ObjectMeta.DeepCopyInto(&out.ObjectMeta) + out.Spec = in.Spec + in.Status.DeepCopyInto(&out.Status) +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KThreesConfig. +func (in *KThreesConfig) DeepCopy() *KThreesConfig { + if in == nil { + return nil + } + out := new(KThreesConfig) + in.DeepCopyInto(out) + return out +} + +// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object. +func (in *KThreesConfig) DeepCopyObject() runtime.Object { + if c := in.DeepCopy(); c != nil { + return c + } + return nil +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *KThreesConfigList) DeepCopyInto(out *KThreesConfigList) { + *out = *in + out.TypeMeta = in.TypeMeta + in.ListMeta.DeepCopyInto(&out.ListMeta) + if in.Items != nil { + in, out := &in.Items, &out.Items + *out = make([]KThreesConfig, len(*in)) + for i := range *in { + (*in)[i].DeepCopyInto(&(*out)[i]) + } + } +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KThreesConfigList. +func (in *KThreesConfigList) DeepCopy() *KThreesConfigList { + if in == nil { + return nil + } + out := new(KThreesConfigList) + in.DeepCopyInto(out) + return out +} + +// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object. +func (in *KThreesConfigList) DeepCopyObject() runtime.Object { + if c := in.DeepCopy(); c != nil { + return c + } + return nil +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *KThreesConfigSpec) DeepCopyInto(out *KThreesConfigSpec) { + *out = *in +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KThreesConfigSpec. +func (in *KThreesConfigSpec) DeepCopy() *KThreesConfigSpec { + if in == nil { + return nil + } + out := new(KThreesConfigSpec) + in.DeepCopyInto(out) + return out +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *KThreesConfigStatus) DeepCopyInto(out *KThreesConfigStatus) { + *out = *in + if in.BootstrapData != nil { + in, out := &in.BootstrapData, &out.BootstrapData + *out = make([]byte, len(*in)) + copy(*out, *in) + } + if in.DataSecretName != nil { + in, out := &in.DataSecretName, &out.DataSecretName + *out = new(string) + **out = **in + } +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KThreesConfigStatus. +func (in *KThreesConfigStatus) DeepCopy() *KThreesConfigStatus { + if in == nil { + return nil + } + out := new(KThreesConfigStatus) + in.DeepCopyInto(out) + return out +} diff --git a/bin/manager b/bin/manager new file mode 100755 index 00000000..fbacccdd Binary files /dev/null and b/bin/manager differ diff --git a/config/certmanager/certificate.yaml b/config/certmanager/certificate.yaml new file mode 100644 index 00000000..58db114f --- /dev/null +++ b/config/certmanager/certificate.yaml @@ -0,0 +1,26 @@ +# The following manifests contain a self-signed issuer CR and a certificate CR. +# More document can be found at https://docs.cert-manager.io +# WARNING: Targets CertManager 0.11 check https://docs.cert-manager.io/en/latest/tasks/upgrading/index.html for +# breaking changes +apiVersion: cert-manager.io/v1alpha2 +kind: Issuer +metadata: + name: selfsigned-issuer + namespace: system +spec: + selfSigned: {} +--- +apiVersion: cert-manager.io/v1alpha2 +kind: Certificate +metadata: + name: serving-cert # this name should match the one appeared in kustomizeconfig.yaml + namespace: system +spec: + # $(SERVICE_NAME) and $(SERVICE_NAMESPACE) will be substituted by kustomize + dnsNames: + - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc + - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc.cluster.local + issuerRef: + kind: Issuer + name: selfsigned-issuer + secretName: webhook-server-cert # this secret will not be prefixed, since it's not managed by kustomize diff --git a/config/certmanager/kustomization.yaml b/config/certmanager/kustomization.yaml new file mode 100644 index 00000000..bebea5a5 --- /dev/null +++ b/config/certmanager/kustomization.yaml @@ -0,0 +1,5 @@ +resources: +- certificate.yaml + +configurations: +- kustomizeconfig.yaml diff --git a/config/certmanager/kustomizeconfig.yaml b/config/certmanager/kustomizeconfig.yaml new file mode 100644 index 00000000..90d7c313 --- /dev/null +++ b/config/certmanager/kustomizeconfig.yaml @@ -0,0 +1,16 @@ +# This configuration is for teaching kustomize how to update name ref and var substitution +nameReference: +- kind: Issuer + group: cert-manager.io + fieldSpecs: + - kind: Certificate + group: cert-manager.io + path: spec/issuerRef/name + +varReference: +- kind: Certificate + group: cert-manager.io + path: spec/commonName +- kind: Certificate + group: cert-manager.io + path: spec/dnsNames diff --git a/config/crd/kustomization.yaml b/config/crd/kustomization.yaml new file mode 100644 index 00000000..75d38e57 --- /dev/null +++ b/config/crd/kustomization.yaml @@ -0,0 +1,21 @@ +# This kustomization.yaml is not intended to be run by itself, +# since it depends on service name and namespace that are out of this kustomize package. +# It should be run by config/default +resources: +- bases/bootstrap.k8s.io_kthreesconfigs.yaml +# +kubebuilder:scaffold:crdkustomizeresource + +patchesStrategicMerge: +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix. +# patches here are for enabling the conversion webhook for each CRD +#- patches/webhook_in_kthreesconfigs.yaml +# +kubebuilder:scaffold:crdkustomizewebhookpatch + +# [CERTMANAGER] To enable webhook, uncomment all the sections with [CERTMANAGER] prefix. +# patches here are for enabling the CA injection for each CRD +#- patches/cainjection_in_kthreesconfigs.yaml +# +kubebuilder:scaffold:crdkustomizecainjectionpatch + +# the following config is for teaching kustomize how to do kustomization for CRDs. +configurations: +- kustomizeconfig.yaml diff --git a/config/crd/kustomizeconfig.yaml b/config/crd/kustomizeconfig.yaml new file mode 100644 index 00000000..6f83d9a9 --- /dev/null +++ b/config/crd/kustomizeconfig.yaml @@ -0,0 +1,17 @@ +# This file is for teaching kustomize how to substitute name and namespace reference in CRD +nameReference: +- kind: Service + version: v1 + fieldSpecs: + - kind: CustomResourceDefinition + group: apiextensions.k8s.io + path: spec/conversion/webhookClientConfig/service/name + +namespace: +- kind: CustomResourceDefinition + group: apiextensions.k8s.io + path: spec/conversion/webhookClientConfig/service/namespace + create: false + +varReference: +- path: metadata/annotations diff --git a/config/crd/patches/cainjection_in_kthreesconfigs.yaml b/config/crd/patches/cainjection_in_kthreesconfigs.yaml new file mode 100644 index 00000000..2bc6db34 --- /dev/null +++ b/config/crd/patches/cainjection_in_kthreesconfigs.yaml @@ -0,0 +1,8 @@ +# The following patch adds a directive for certmanager to inject CA into the CRD +# CRD conversion requires k8s 1.13 or later. +apiVersion: apiextensions.k8s.io/v1beta1 +kind: CustomResourceDefinition +metadata: + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) + name: kthreesconfigs.bootstrap.k8s.io diff --git a/config/crd/patches/webhook_in_kthreesconfigs.yaml b/config/crd/patches/webhook_in_kthreesconfigs.yaml new file mode 100644 index 00000000..f1e48a72 --- /dev/null +++ b/config/crd/patches/webhook_in_kthreesconfigs.yaml @@ -0,0 +1,17 @@ +# The following patch enables conversion webhook for CRD +# CRD conversion requires k8s 1.13 or later. +apiVersion: apiextensions.k8s.io/v1beta1 +kind: CustomResourceDefinition +metadata: + name: kthreesconfigs.bootstrap.k8s.io +spec: + conversion: + strategy: Webhook + webhookClientConfig: + # this is "\n" used as a placeholder, otherwise it will be rejected by the apiserver for being blank, + # but we're going to set it later using the cert-manager (or potentially a patch if not using cert-manager) + caBundle: Cg== + service: + namespace: system + name: webhook-service + path: /convert diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml new file mode 100644 index 00000000..738d8c12 --- /dev/null +++ b/config/default/kustomization.yaml @@ -0,0 +1,70 @@ +# Adds namespace to all resources. +namespace: cluster-api-bootstrap-provider-k3s-system + +# Value of this field is prepended to the +# names of all resources, e.g. a deployment named +# "wordpress" becomes "alices-wordpress". +# Note that it should also match with the prefix (text before '-') of the namespace +# field above. +namePrefix: cluster-api-bootstrap-provider-k3s- + +# Labels to add to all resources and selectors. +#commonLabels: +# someName: someValue + +bases: +- ../crd +- ../rbac +- ../manager +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- ../webhook +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required. +#- ../certmanager +# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'. +#- ../prometheus + +patchesStrategicMerge: + # Protect the /metrics endpoint by putting it behind auth. + # If you want your controller-manager to expose the /metrics + # endpoint w/o any authn/z, please comment the following line. +- manager_auth_proxy_patch.yaml + +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- manager_webhook_patch.yaml + +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. +# Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks. +# 'CERTMANAGER' needs to be enabled to use ca injection +#- webhookcainjection_patch.yaml + +# the following config is for teaching kustomize how to do var substitution +vars: +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix. +#- name: CERTIFICATE_NAMESPACE # namespace of the certificate CR +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1alpha2 +# name: serving-cert # this name should match the one in certificate.yaml +# fieldref: +# fieldpath: metadata.namespace +#- name: CERTIFICATE_NAME +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1alpha2 +# name: serving-cert # this name should match the one in certificate.yaml +#- name: SERVICE_NAMESPACE # namespace of the service +# objref: +# kind: Service +# version: v1 +# name: webhook-service +# fieldref: +# fieldpath: metadata.namespace +#- name: SERVICE_NAME +# objref: +# kind: Service +# version: v1 +# name: webhook-service diff --git a/config/default/manager_auth_proxy_patch.yaml b/config/default/manager_auth_proxy_patch.yaml new file mode 100644 index 00000000..77e743d1 --- /dev/null +++ b/config/default/manager_auth_proxy_patch.yaml @@ -0,0 +1,25 @@ +# This patch inject a sidecar container which is a HTTP proxy for the +# controller manager, it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews. +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: kube-rbac-proxy + image: gcr.io/kubebuilder/kube-rbac-proxy:v0.5.0 + args: + - "--secure-listen-address=0.0.0.0:8443" + - "--upstream=http://127.0.0.1:8080/" + - "--logtostderr=true" + - "--v=10" + ports: + - containerPort: 8443 + name: https + - name: manager + args: + - "--metrics-addr=127.0.0.1:8080" + - "--enable-leader-election" diff --git a/config/default/manager_webhook_patch.yaml b/config/default/manager_webhook_patch.yaml new file mode 100644 index 00000000..738de350 --- /dev/null +++ b/config/default/manager_webhook_patch.yaml @@ -0,0 +1,23 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: manager + ports: + - containerPort: 9443 + name: webhook-server + protocol: TCP + volumeMounts: + - mountPath: /tmp/k8s-webhook-server/serving-certs + name: cert + readOnly: true + volumes: + - name: cert + secret: + defaultMode: 420 + secretName: webhook-server-cert diff --git a/config/default/webhookcainjection_patch.yaml b/config/default/webhookcainjection_patch.yaml new file mode 100644 index 00000000..7e79bf99 --- /dev/null +++ b/config/default/webhookcainjection_patch.yaml @@ -0,0 +1,15 @@ +# This patch add annotation to admission webhook config and +# the variables $(CERTIFICATE_NAMESPACE) and $(CERTIFICATE_NAME) will be substituted by kustomize. +apiVersion: admissionregistration.k8s.io/v1beta1 +kind: MutatingWebhookConfiguration +metadata: + name: mutating-webhook-configuration + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) +--- +apiVersion: admissionregistration.k8s.io/v1beta1 +kind: ValidatingWebhookConfiguration +metadata: + name: validating-webhook-configuration + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml new file mode 100644 index 00000000..5c5f0b84 --- /dev/null +++ b/config/manager/kustomization.yaml @@ -0,0 +1,2 @@ +resources: +- manager.yaml diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml new file mode 100644 index 00000000..b6c85a52 --- /dev/null +++ b/config/manager/manager.yaml @@ -0,0 +1,39 @@ +apiVersion: v1 +kind: Namespace +metadata: + labels: + control-plane: controller-manager + name: system +--- +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system + labels: + control-plane: controller-manager +spec: + selector: + matchLabels: + control-plane: controller-manager + replicas: 1 + template: + metadata: + labels: + control-plane: controller-manager + spec: + containers: + - command: + - /manager + args: + - --enable-leader-election + image: controller:latest + name: manager + resources: + limits: + cpu: 100m + memory: 30Mi + requests: + cpu: 100m + memory: 20Mi + terminationGracePeriodSeconds: 10 diff --git a/config/prometheus/kustomization.yaml b/config/prometheus/kustomization.yaml new file mode 100644 index 00000000..ed137168 --- /dev/null +++ b/config/prometheus/kustomization.yaml @@ -0,0 +1,2 @@ +resources: +- monitor.yaml diff --git a/config/prometheus/monitor.yaml b/config/prometheus/monitor.yaml new file mode 100644 index 00000000..9b8047b7 --- /dev/null +++ b/config/prometheus/monitor.yaml @@ -0,0 +1,16 @@ + +# Prometheus Monitor Service (Metrics) +apiVersion: monitoring.coreos.com/v1 +kind: ServiceMonitor +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-monitor + namespace: system +spec: + endpoints: + - path: /metrics + port: https + selector: + matchLabels: + control-plane: controller-manager diff --git a/config/rbac/auth_proxy_client_clusterrole.yaml b/config/rbac/auth_proxy_client_clusterrole.yaml new file mode 100644 index 00000000..7d62534c --- /dev/null +++ b/config/rbac/auth_proxy_client_clusterrole.yaml @@ -0,0 +1,7 @@ +apiVersion: rbac.authorization.k8s.io/v1beta1 +kind: ClusterRole +metadata: + name: metrics-reader +rules: +- nonResourceURLs: ["/metrics"] + verbs: ["get"] diff --git a/config/rbac/auth_proxy_role.yaml b/config/rbac/auth_proxy_role.yaml new file mode 100644 index 00000000..618f5e41 --- /dev/null +++ b/config/rbac/auth_proxy_role.yaml @@ -0,0 +1,13 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: proxy-role +rules: +- apiGroups: ["authentication.k8s.io"] + resources: + - tokenreviews + verbs: ["create"] +- apiGroups: ["authorization.k8s.io"] + resources: + - subjectaccessreviews + verbs: ["create"] diff --git a/config/rbac/auth_proxy_role_binding.yaml b/config/rbac/auth_proxy_role_binding.yaml new file mode 100644 index 00000000..48ed1e4b --- /dev/null +++ b/config/rbac/auth_proxy_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: proxy-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: proxy-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/rbac/auth_proxy_service.yaml b/config/rbac/auth_proxy_service.yaml new file mode 100644 index 00000000..6cf656be --- /dev/null +++ b/config/rbac/auth_proxy_service.yaml @@ -0,0 +1,14 @@ +apiVersion: v1 +kind: Service +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-service + namespace: system +spec: + ports: + - name: https + port: 8443 + targetPort: https + selector: + control-plane: controller-manager diff --git a/config/rbac/kthreesconfig_editor_role.yaml b/config/rbac/kthreesconfig_editor_role.yaml new file mode 100644 index 00000000..62047ead --- /dev/null +++ b/config/rbac/kthreesconfig_editor_role.yaml @@ -0,0 +1,24 @@ +# permissions for end users to edit kthreesconfigs. +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: kthreesconfig-editor-role +rules: +- apiGroups: + - bootstrap.k8s.io + resources: + - kthreesconfigs + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - bootstrap.k8s.io + resources: + - kthreesconfigs/status + verbs: + - get diff --git a/config/rbac/kthreesconfig_viewer_role.yaml b/config/rbac/kthreesconfig_viewer_role.yaml new file mode 100644 index 00000000..789df9dc --- /dev/null +++ b/config/rbac/kthreesconfig_viewer_role.yaml @@ -0,0 +1,20 @@ +# permissions for end users to view kthreesconfigs. +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: kthreesconfig-viewer-role +rules: +- apiGroups: + - bootstrap.k8s.io + resources: + - kthreesconfigs + verbs: + - get + - list + - watch +- apiGroups: + - bootstrap.k8s.io + resources: + - kthreesconfigs/status + verbs: + - get diff --git a/config/rbac/kustomization.yaml b/config/rbac/kustomization.yaml new file mode 100644 index 00000000..66c28338 --- /dev/null +++ b/config/rbac/kustomization.yaml @@ -0,0 +1,12 @@ +resources: +- role.yaml +- role_binding.yaml +- leader_election_role.yaml +- leader_election_role_binding.yaml +# Comment the following 4 lines if you want to disable +# the auth proxy (https://github.com/brancz/kube-rbac-proxy) +# which protects your /metrics endpoint. +- auth_proxy_service.yaml +- auth_proxy_role.yaml +- auth_proxy_role_binding.yaml +- auth_proxy_client_clusterrole.yaml diff --git a/config/rbac/leader_election_role.yaml b/config/rbac/leader_election_role.yaml new file mode 100644 index 00000000..eaa79158 --- /dev/null +++ b/config/rbac/leader_election_role.yaml @@ -0,0 +1,32 @@ +# permissions to do leader election. +apiVersion: rbac.authorization.k8s.io/v1 +kind: Role +metadata: + name: leader-election-role +rules: +- apiGroups: + - "" + resources: + - configmaps + verbs: + - get + - list + - watch + - create + - update + - patch + - delete +- apiGroups: + - "" + resources: + - configmaps/status + verbs: + - get + - update + - patch +- apiGroups: + - "" + resources: + - events + verbs: + - create diff --git a/config/rbac/leader_election_role_binding.yaml b/config/rbac/leader_election_role_binding.yaml new file mode 100644 index 00000000..eed16906 --- /dev/null +++ b/config/rbac/leader_election_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: RoleBinding +metadata: + name: leader-election-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: Role + name: leader-election-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/rbac/role_binding.yaml b/config/rbac/role_binding.yaml new file mode 100644 index 00000000..8f265870 --- /dev/null +++ b/config/rbac/role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: manager-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: manager-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/samples/bootstrap_v1alpha1_kthreesconfig.yaml b/config/samples/bootstrap_v1alpha1_kthreesconfig.yaml new file mode 100644 index 00000000..61392b75 --- /dev/null +++ b/config/samples/bootstrap_v1alpha1_kthreesconfig.yaml @@ -0,0 +1,7 @@ +apiVersion: bootstrap.k8s.io/v1alpha1 +kind: KThreesConfig +metadata: + name: kthreesconfig-sample +spec: + # Add fields here + foo: bar diff --git a/config/webhook/kustomization.yaml b/config/webhook/kustomization.yaml new file mode 100644 index 00000000..9cf26134 --- /dev/null +++ b/config/webhook/kustomization.yaml @@ -0,0 +1,6 @@ +resources: +- manifests.yaml +- service.yaml + +configurations: +- kustomizeconfig.yaml diff --git a/config/webhook/kustomizeconfig.yaml b/config/webhook/kustomizeconfig.yaml new file mode 100644 index 00000000..25e21e3c --- /dev/null +++ b/config/webhook/kustomizeconfig.yaml @@ -0,0 +1,25 @@ +# the following config is for teaching kustomize where to look at when substituting vars. +# It requires kustomize v2.1.0 or newer to work properly. +nameReference: +- kind: Service + version: v1 + fieldSpecs: + - kind: MutatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/name + - kind: ValidatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/name + +namespace: +- kind: MutatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/namespace + create: true +- kind: ValidatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/namespace + create: true + +varReference: +- path: metadata/annotations diff --git a/config/webhook/service.yaml b/config/webhook/service.yaml new file mode 100644 index 00000000..31e0f829 --- /dev/null +++ b/config/webhook/service.yaml @@ -0,0 +1,12 @@ + +apiVersion: v1 +kind: Service +metadata: + name: webhook-service + namespace: system +spec: + ports: + - port: 443 + targetPort: 9443 + selector: + control-plane: controller-manager diff --git a/controllers/kthreesconfig_controller.go b/controllers/kthreesconfig_controller.go new file mode 100644 index 00000000..00682506 --- /dev/null +++ b/controllers/kthreesconfig_controller.go @@ -0,0 +1,333 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package controllers + +import ( + "context" + "fmt" + + corev1 "k8s.io/api/core/v1" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + + "time" + + "github.com/go-logr/logr" + "github.com/pkg/errors" + apierrors "k8s.io/apimachinery/pkg/api/errors" + "k8s.io/apimachinery/pkg/runtime" + kerrors "k8s.io/apimachinery/pkg/util/errors" + "k8s.io/utils/pointer" + clusterv1 "sigs.k8s.io/cluster-api/api/v1alpha3" + bsutil "sigs.k8s.io/cluster-api/bootstrap/util" + "sigs.k8s.io/cluster-api/util" + "sigs.k8s.io/cluster-api/util/annotations" + "sigs.k8s.io/cluster-api/util/patch" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + + bootstrapv1alpha1 "github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s/api/v1alpha1" +) + +// InitLocker is a lock that is used around kubeadm init +type InitLocker interface { + Lock(ctx context.Context, cluster *clusterv1.Cluster, machine *clusterv1.Machine) bool + Unlock(ctx context.Context, cluster *clusterv1.Cluster) bool +} + +// KThreesConfigReconciler reconciles a KThreesConfig object +type KThreesConfigReconciler struct { + client.Client + Log logr.Logger + KThreesInitLock InitLocker + Scheme *runtime.Scheme +} + +type Scope struct { + logr.Logger + Config *bootstrapv1alpha1.KThreesConfig + ConfigOwner *bsutil.ConfigOwner + Cluster *clusterv1.Cluster +} + +// +kubebuilder:rbac:groups=bootstrap.k8s.io,resources=kthreesconfigs,verbs=get;list;watch;create;update;patch;delete +// +kubebuilder:rbac:groups=bootstrap.k8s.io,resources=kthreesconfigs/status,verbs=get;update;patch +// +kubebuilder:rbac:groups=cluster.x-k8s.io,resources=clusters;clusters/status;machines;machines/status,verbs=get;list;watch +// +kubebuilder:rbac:groups=exp.cluster.x-k8s.io,resources=machinepools;machinepools/status,verbs=get;list;watch +// +kubebuilder:rbac:groups="",resources=secrets;events;configmaps,verbs=get;list;watch;create;update;patch;delete + +func (r *KThreesConfigReconciler) Reconcile(req ctrl.Request) (_ ctrl.Result, rerr error) { + ctx := context.Background() + log := r.Log.WithValues("kthreesconfig", req.NamespacedName) + + // Lookup the kubeadm config + config := &bootstrapv1alpha1.KThreesConfig{} + if err := r.Client.Get(ctx, req.NamespacedName, config); err != nil { + if apierrors.IsNotFound(err) { + return ctrl.Result{}, nil + } + log.Error(err, "Failed to get config") + return ctrl.Result{}, err + } + + // Look up the owner of this KubeConfig if there is one + configOwner, err := bsutil.GetConfigOwner(ctx, r.Client, config) + if apierrors.IsNotFound(errors.Cause(err)) { + // Could not find the owner yet, this is not an error and will rereconcile when the owner gets set. + return ctrl.Result{}, nil + } + if err != nil { + log.Error(err, "Failed to get owner") + return ctrl.Result{}, err + } + if configOwner == nil { + return ctrl.Result{}, nil + } + log = log.WithValues("kind", configOwner.GetKind(), "version", configOwner.GetResourceVersion(), "name", configOwner.GetName()) + + // Lookup the cluster the config owner is associated with + cluster, err := util.GetClusterByName(ctx, r.Client, configOwner.GetNamespace(), configOwner.ClusterName()) + if err != nil { + if errors.Cause(err) == util.ErrNoCluster { + log.Info(fmt.Sprintf("%s does not belong to a cluster yet, waiting until it's part of a cluster", configOwner.GetKind())) + return ctrl.Result{}, nil + } + + if apierrors.IsNotFound(errors.Cause(err)) { + log.Info("Cluster does not exist yet, waiting until it is created") + return ctrl.Result{}, nil + } + log.Error(err, "Could not get cluster with metadata") + return ctrl.Result{}, err + } + + if annotations.IsPaused(cluster, config) { + log.Info("Reconciliation is paused for this object") + return ctrl.Result{}, nil + } + + scope := &Scope{ + Logger: log, + Config: config, + ConfigOwner: configOwner, + Cluster: cluster, + } + + // Initialize the patch helper. + patchHelper, err := patch.NewHelper(config, r.Client) + if err != nil { + return ctrl.Result{}, err + } + + // Attempt to Patch the KubeadmConfig object and status after each reconciliation if no error occurs. + defer func() { + // always update the readyCondition; the summary is represented using the "1 of x completed" notation. + + /** + conditions.SetSummary(config, + conditions.WithConditions( + bootstrapv1.DataSecretAvailableCondition, + bootstrapv1.CertificatesAvailableCondition, + ), + ) + **/ + // Patch ObservedGeneration only if the reconciliation completed successfully + patchOpts := []patch.Option{} + if rerr == nil { + patchOpts = append(patchOpts, patch.WithStatusObservedGeneration{}) + } + if err := patchHelper.Patch(ctx, config, patchOpts...); err != nil { + log.Error(rerr, "Failed to patch config") + if rerr == nil { + rerr = err + } + } + }() + + switch { + // Wait for the infrastructure to be ready. + case !cluster.Status.InfrastructureReady: + log.Info("Cluster infrastructure is not ready, waiting") + //conditions.MarkFalse(config, bootstrapv1.DataSecretAvailableCondition, bootstrapv1.WaitingForClusterInfrastructureReason, clusterv1.ConditionSeverityInfo, "") + return ctrl.Result{}, nil + // Migrate plaintext data to secret. + case config.Status.BootstrapData != nil && config.Status.DataSecretName == nil: + return ctrl.Result{}, r.storeBootstrapData(ctx, scope, config.Status.BootstrapData) + // Reconcile status for machines that already have a secret reference, but our status isn't up to date. + // This case solves the pivoting scenario (or a backup restore) which doesn't preserve the status subresource on objects. + case configOwner.DataSecretName() != nil && (!config.Status.Ready || config.Status.DataSecretName == nil): + config.Status.Ready = true + config.Status.DataSecretName = configOwner.DataSecretName() + //conditions.MarkTrue(config, bootstrapv1.DataSecretAvailableCondition) + return ctrl.Result{}, nil + // Status is ready means a config has been generated. + case config.Status.Ready: + // If the BootstrapToken has been generated for a join and the infrastructure is not ready. + // This indicates the token in the join config has not been consumed and it may need a refresh. + /** + if config.Spec.JoinConfiguration != nil && config.Spec.JoinConfiguration.Discovery.BootstrapToken != nil { + if !configOwner.IsInfrastructureReady() { + return r.refreshBootstrapToken(ctx, log, cluster, config) + } else if (config.Spec.JoinConfiguration != nil && config.Spec.JoinConfiguration.Discovery.BootstrapToken != nil) && configOwner.IsMachinePool() { + // If the BootstrapToken has been generated and infrastructure is ready but the configOwner is a MachinePool, + // we rotate the token to keep it fresh for future scale ups. + return r.rotateMachinePoolBootstrapToken(ctx, log, cluster, config, scope) + } + } + **/ + // In any other case just return as the config is already generated and need not be generated again. + return ctrl.Result{}, nil + } + + if !cluster.Status.ControlPlaneInitialized { + return r.handleClusterNotInitialized(ctx, scope) + } + + /** + // Every other case it's a join scenario + // Nb. in this case ClusterConfiguration and InitConfiguration should not be defined by users, but in case of misconfigurations, CABPK simply ignore them + + // Unlock any locks that might have been set during init process + r.KubeadmInitLock.Unlock(ctx, cluster) + + // if the JoinConfiguration is missing, create a default one + if config.Spec.JoinConfiguration == nil { + log.Info("Creating default JoinConfiguration") + config.Spec.JoinConfiguration = &kubeadmv1beta1.JoinConfiguration{} + } + + // it's a control plane join + if configOwner.IsControlPlaneMachine() { + return r.joinControlplane(ctx, scope) + } + + + // It's a worker join + return r.joinWorker(ctx, scope) + + **/ + + return ctrl.Result{}, nil +} + +func (r *KThreesConfigReconciler) handleClusterNotInitialized(ctx context.Context, scope *Scope) (_ ctrl.Result, reterr error) { + // initialize the DataSecretAvailableCondition if missing. + // this is required in order to avoid the condition's LastTransitionTime to flicker in case of errors surfacing + // using the DataSecretGeneratedFailedReason + //if conditions.GetReason(scope.Config, bootstrapv1.DataSecretAvailableCondition) != bootstrapv1.DataSecretGenerationFailedReason { + // conditions.MarkFalse(scope.Config, bootstrapv1.DataSecretAvailableCondition, clusterv1.WaitingForControlPlaneAvailableReason, clusterv1.ConditionSeverityInfo, "") + //} + + // if it's NOT a control plane machine, requeue + if !scope.ConfigOwner.IsControlPlaneMachine() { + return ctrl.Result{RequeueAfter: 30 * time.Second}, nil + } + + machine := &clusterv1.Machine{} + if err := runtime.DefaultUnstructuredConverter.FromUnstructured(scope.ConfigOwner.Object, machine); err != nil { + return ctrl.Result{}, errors.Wrapf(err, "cannot convert %s to Machine", scope.ConfigOwner.GetKind()) + } + + // acquire the init lock so that only the first machine configured + // as control plane get processed here + // if not the first, requeue + if !r.KThreesInitLock.Lock(ctx, scope.Cluster, machine) { + scope.Info("A control plane is already being initialized, requeing until control plane is ready") + return ctrl.Result{RequeueAfter: 30 * time.Second}, nil + } + + defer func() { + if reterr != nil { + if !r.KThreesInitLock.Unlock(ctx, scope.Cluster) { + reterr = kerrors.NewAggregate([]error{reterr, errors.New("failed to unlock the kubeadm init lock")}) + } + } + }() + + scope.Info("Creating BootstrapData for the init control plane") + + /** + certificates := secret.NewCertificatesForInitialControlPlane(scope.Config.Spec.ClusterConfiguration) + err = certificates.LookupOrGenerate( + ctx, + r.Client, + util.ObjectKey(scope.Cluster), + *metav1.NewControllerRef(scope.Config, bootstrapv1.GroupVersion.WithKind("KThreesConfig")), + ) + if err != nil { + // conditions.MarkFalse(scope.Config, bootstrapv1.CertificatesAvailableCondition, bootstrapv1.CertificatesGenerationFailedReason, clusterv1.ConditionSeverityWarning, err.Error()) + return ctrl.Result{}, err + } + //conditions.MarkTrue(scope.Config, bootstrapv1.CertificatesAvailableCondition) + **/ + + cloudInitData := []byte{} + if err := r.storeBootstrapData(ctx, scope, cloudInitData); err != nil { + scope.Error(err, "Failed to store bootstrap data") + return ctrl.Result{}, err + } + + return ctrl.Result{}, nil +} + +func (r *KThreesConfigReconciler) SetupWithManager(mgr ctrl.Manager) error { + return ctrl.NewControllerManagedBy(mgr). + For(&bootstrapv1alpha1.KThreesConfig{}). + Complete(r) +} + +// storeBootstrapData creates a new secret with the data passed in as input, +// sets the reference in the configuration status and ready to true. +func (r *KThreesConfigReconciler) storeBootstrapData(ctx context.Context, scope *Scope, data []byte) error { + secret := &corev1.Secret{ + ObjectMeta: metav1.ObjectMeta{ + Name: scope.Config.Name, + Namespace: scope.Config.Namespace, + Labels: map[string]string{ + clusterv1.ClusterLabelName: scope.Cluster.Name, + }, + OwnerReferences: []metav1.OwnerReference{ + { + APIVersion: bootstrapv1alpha1.GroupVersion.String(), + Kind: "KThreesConfig", + Name: scope.Config.Name, + UID: scope.Config.UID, + Controller: pointer.BoolPtr(true), + }, + }, + }, + Data: map[string][]byte{ + "value": data, + }, + Type: clusterv1.ClusterSecretType, + } + + // as secret creation and scope.Config status patch are not atomic operations + // it is possible that secret creation happens but the config.Status patches are not applied + if err := r.Client.Create(ctx, secret); err != nil { + if !apierrors.IsAlreadyExists(err) { + return errors.Wrapf(err, "failed to create bootstrap data secret for KubeadmConfig %s/%s", scope.Config.Namespace, scope.Config.Name) + } + r.Log.Info("bootstrap data secret for KubeadmConfig already exists, updating", "secret", secret.Name, "KubeadmConfig", scope.Config.Name) + if err := r.Client.Update(ctx, secret); err != nil { + return errors.Wrapf(err, "failed to update bootstrap data secret for KubeadmConfig %s/%s", scope.Config.Namespace, scope.Config.Name) + } + } + scope.Config.Status.DataSecretName = pointer.StringPtr(secret.Name) + scope.Config.Status.Ready = true + // conditions.MarkTrue(scope.Config, bootstrapv1.DataSecretAvailableCondition) + return nil +} diff --git a/controllers/suite_test.go b/controllers/suite_test.go new file mode 100644 index 00000000..14ce0129 --- /dev/null +++ b/controllers/suite_test.go @@ -0,0 +1,81 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package controllers + +import ( + "path/filepath" + "testing" + + . "github.com/onsi/ginkgo" + . "github.com/onsi/gomega" + "k8s.io/client-go/kubernetes/scheme" + "k8s.io/client-go/rest" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/envtest" + "sigs.k8s.io/controller-runtime/pkg/envtest/printer" + logf "sigs.k8s.io/controller-runtime/pkg/log" + "sigs.k8s.io/controller-runtime/pkg/log/zap" + + bootstrapv1alpha1 "github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s/api/v1alpha1" + // +kubebuilder:scaffold:imports +) + +// These tests use Ginkgo (BDD-style Go testing framework). Refer to +// http://onsi.github.io/ginkgo/ to learn more about Ginkgo. + +var cfg *rest.Config +var k8sClient client.Client +var testEnv *envtest.Environment + +func TestAPIs(t *testing.T) { + RegisterFailHandler(Fail) + + RunSpecsWithDefaultAndCustomReporters(t, + "Controller Suite", + []Reporter{printer.NewlineReporter{}}) +} + +var _ = BeforeSuite(func(done Done) { + logf.SetLogger(zap.LoggerTo(GinkgoWriter, true)) + + By("bootstrapping test environment") + testEnv = &envtest.Environment{ + CRDDirectoryPaths: []string{filepath.Join("..", "config", "crd", "bases")}, + } + + var err error + cfg, err = testEnv.Start() + Expect(err).ToNot(HaveOccurred()) + Expect(cfg).ToNot(BeNil()) + + err = bootstrapv1alpha1.AddToScheme(scheme.Scheme) + Expect(err).NotTo(HaveOccurred()) + + // +kubebuilder:scaffold:scheme + + k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme}) + Expect(err).ToNot(HaveOccurred()) + Expect(k8sClient).ToNot(BeNil()) + + close(done) +}, 60) + +var _ = AfterSuite(func() { + By("tearing down the test environment") + err := testEnv.Stop() + Expect(err).ToNot(HaveOccurred()) +}) diff --git a/go.mod b/go.mod new file mode 100644 index 00000000..e132e7e4 --- /dev/null +++ b/go.mod @@ -0,0 +1,17 @@ +module github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s + +go 1.13 + +require ( + github.com/go-logr/logr v0.1.0 + github.com/onsi/ginkgo v1.12.1 + github.com/onsi/gomega v1.10.1 + github.com/pkg/errors v0.9.1 + k8s.io/api v0.17.9 + k8s.io/apimachinery v0.17.9 + k8s.io/client-go v0.17.9 + k8s.io/utils v0.0.0-20200619165400-6e3d28b6ed19 + sigs.k8s.io/cluster-api v0.3.12 + sigs.k8s.io/controller-runtime v0.5.14 + sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 00000000..01d3ccd7 --- /dev/null +++ b/go.sum @@ -0,0 +1,657 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod 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"License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ \ No newline at end of file diff --git a/main.go b/main.go new file mode 100644 index 00000000..019909c0 --- /dev/null +++ b/main.go @@ -0,0 +1,84 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package main + +import ( + "flag" + "os" + + "k8s.io/apimachinery/pkg/runtime" + clientgoscheme "k8s.io/client-go/kubernetes/scheme" + _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/log/zap" + + bootstrapv1alpha1 "github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s/api/v1alpha1" + "github.com/zawachte-msft/cluster-api-bootstrap-provider-k3s/controllers" + // +kubebuilder:scaffold:imports +) + +var ( + scheme = runtime.NewScheme() + setupLog = ctrl.Log.WithName("setup") +) + +func init() { + _ = clientgoscheme.AddToScheme(scheme) + + _ = bootstrapv1alpha1.AddToScheme(scheme) + // +kubebuilder:scaffold:scheme +} + +func main() { + var metricsAddr string + var enableLeaderElection bool + flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.") + flag.BoolVar(&enableLeaderElection, "enable-leader-election", false, + "Enable leader election for controller manager. "+ + "Enabling this will ensure there is only one active controller manager.") + flag.Parse() + + ctrl.SetLogger(zap.New(zap.UseDevMode(true))) + + mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ + Scheme: scheme, + MetricsBindAddress: metricsAddr, + Port: 9443, + LeaderElection: enableLeaderElection, + LeaderElectionID: "6b2b21b1.k8s.io", + }) + if err != nil { + setupLog.Error(err, "unable to start manager") + os.Exit(1) + } + + if err = (&controllers.KThreesConfigReconciler{ + Client: mgr.GetClient(), + Log: ctrl.Log.WithName("controllers").WithName("KThreesConfig"), + Scheme: mgr.GetScheme(), + }).SetupWithManager(mgr); err != nil { + setupLog.Error(err, "unable to create controller", "controller", "KThreesConfig") + os.Exit(1) + } + // +kubebuilder:scaffold:builder + + setupLog.Info("starting manager") + if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { + setupLog.Error(err, "problem running manager") + os.Exit(1) + } +} diff --git a/pkg/cloudinit/cloudinit.go b/pkg/cloudinit/cloudinit.go new file mode 100644 index 00000000..dcdefcf0 --- /dev/null +++ b/pkg/cloudinit/cloudinit.go @@ -0,0 +1,139 @@ +/* +Copyright 2019 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package cloudinit + +import ( + "bytes" + "strings" + "text/template" + + "github.com/pkg/errors" + bootstrapv1 "sigs.k8s.io/cluster-api/bootstrap/kubeadm/api/v1alpha3" +) + +var ( + defaultTemplateFuncMap = template.FuncMap{ + "Indent": templateYAMLIndent, + } +) + +func templateYAMLIndent(i int, input string) string { + split := strings.Split(input, "\n") + ident := "\n" + strings.Repeat(" ", i) + return strings.Repeat(" ", i) + strings.Join(split, ident) +} + +const ( + k3sScriptName = "/usr/local/bin/k3s" + k3sScriptOwner = "root" + k3sScriptPermissions = "0755" + cloudConfigHeader = `## template: jinja +#cloud-config +` + + filesTemplate = `{{ define "files" -}} +write_files:{{ range . }} +- path: {{.Path}} + {{ if ne .Encoding "" -}} + encoding: "{{.Encoding}}" + {{ end -}} + {{ if ne .Owner "" -}} + owner: {{.Owner}} + {{ end -}} + {{ if ne .Permissions "" -}} + permissions: '{{.Permissions}}' + {{ end -}} + content: | +{{.Content | Indent 6}} +{{- end -}} +{{- end -}} +` + + commandsTemplate = `{{- define "commands" -}} +{{ range . }} + - {{printf "%q" .}} +{{- end -}} +{{- end -}} +` +) + +// BaseUserData is shared across all the various types of files written to disk. +type BaseUserData struct { + Header string + PreK3sCommands []string + PostK3sCommands []string + AdditionalFiles []bootstrapv1.File + WriteFiles []bootstrapv1.File + ControlPlane bool +} + +func (input *BaseUserData) prepare() error { + input.Header = cloudConfigHeader + input.WriteFiles = append(input.WriteFiles, input.AdditionalFiles...) + + /** + scriptFile, err := generateBootstrapScript(input) + if err != nil { + return errors.Wrap(err, "failed to generate user data for machine joining control plane") + } + input.WriteFiles = append(input.WriteFiles, *scriptFile) + **/ + + return nil +} + +func generate(kind string, tpl string, data interface{}) ([]byte, error) { + tm := template.New(kind).Funcs(defaultTemplateFuncMap) + if _, err := tm.Parse(filesTemplate); err != nil { + return nil, errors.Wrap(err, "failed to parse files template") + } + + if _, err := tm.Parse(commandsTemplate); err != nil { + return nil, errors.Wrap(err, "failed to parse commands template") + } + + t, err := tm.Parse(tpl) + if err != nil { + return nil, errors.Wrapf(err, "failed to parse %s template", kind) + } + + var out bytes.Buffer + if err := t.Execute(&out, data); err != nil { + return nil, errors.Wrapf(err, "failed to generate %s template", kind) + } + + return out.Bytes(), nil +} + +/** +func generateBootstrapScript(input interface{}) (*bootstrapv1.File, error) { + scriptBytes, err := bootstrapKubeadmInternalCloudinitKubeadmBootstrapScriptShBytes() + if err != nil { + return nil, errors.Wrap(err, "couldn't read bootstrap script") + } + joinScript, err := generate("JoinScript", string(scriptBytes), input) + if err != nil { + return nil, errors.Wrap(err, "failed to bootstrap script for machine joins") + } + return &bootstrapv1.File{ + Path: retriableJoinScriptName, + Owner: retriableJoinScriptOwner, + Permissions: retriableJoinScriptPermissions, + Content: string(joinScript), + }, nil +} +**/ diff --git a/pkg/cloudinit/controlplane_init.go b/pkg/cloudinit/controlplane_init.go new file mode 100644 index 00000000..fa0f9949 --- /dev/null +++ b/pkg/cloudinit/controlplane_init.go @@ -0,0 +1,50 @@ +/* +Copyright 2019 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package cloudinit + +import ( + "sigs.k8s.io/cluster-api/util/secret" +) + +const ( + controlPlaneCloudInit = `{{.Header}} +{{template "files" .WriteFiles}} +runcmd: +{{- template "commands" .PreK3sCommands }} + - 'curl -sfL https://get.k3s.io | sh -s - --disable-cloud-controller' +{{- template "commands" .PostK3sCommands }} +` +) + +// ControlPlaneInput defines the context to generate a controlplane instance user data. +type ControlPlaneInput struct { + BaseUserData + secret.Certificates +} + +// NewInitControlPlane returns the user data string to be used on a controlplane instance. +func NewInitControlPlane(input *ControlPlaneInput) ([]byte, error) { + input.Header = cloudConfigHeader + input.WriteFiles = input.Certificates.AsFiles() + input.WriteFiles = append(input.WriteFiles, input.AdditionalFiles...) + userData, err := generate("InitControlplane", controlPlaneCloudInit, input) + if err != nil { + return nil, err + } + + return userData, nil +} diff --git a/pkg/cloudinit/controlplane_init_test.go b/pkg/cloudinit/controlplane_init_test.go new file mode 100644 index 00000000..f3ab3925 --- /dev/null +++ b/pkg/cloudinit/controlplane_init_test.go @@ -0,0 +1,64 @@ +/* +Copyright 2019 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package cloudinit + +import ( + "testing" + + . "github.com/onsi/gomega" + infrav1 "sigs.k8s.io/cluster-api/bootstrap/kubeadm/api/v1alpha3" + "sigs.k8s.io/cluster-api/util/certs" + "sigs.k8s.io/cluster-api/util/secret" +) + +func TestTemplateYAMLIndent(t *testing.T) { + + g := NewWithT(t) + + cpinput := &ControlPlaneInput{ + BaseUserData: BaseUserData{ + PreK3sCommands: nil, + PostK3sCommands: nil, + AdditionalFiles: []infrav1.File{ + { + Path: "/tmp/my-path", + Encoding: infrav1.Base64, + Content: "aGk=", + }, + { + Path: "/tmp/my-other-path", + Content: "hi", + }, + }, + }, + + Certificates: secret.Certificates{}, + } + + for _, certificate := range cpinput.Certificates { + certificate.KeyPair = &certs.KeyPair{ + Cert: []byte("some certificate"), + Key: []byte("some key"), + } + } + + out, err := NewInitControlPlane(cpinput) + g.Expect(err).NotTo(HaveOccurred()) + + t.Log(string(out)) + +} diff --git a/pkg/cloudinit/k3s.sh b/pkg/cloudinit/k3s.sh new file mode 100644 index 00000000..57e49908 --- /dev/null +++ b/pkg/cloudinit/k3s.sh @@ -0,0 +1,864 @@ +#!/bin/sh +set -e + +# Usage: +# curl ... | ENV_VAR=... sh - +# or +# ENV_VAR=... ./install.sh +# +# Example: +# Installing a server without traefik: +# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh - +# Installing an agent to point at a server: +# curl ... | K3S_TOKEN=xxx K3S_URL=https://server-url:6443 sh - +# +# Environment variables: +# - K3S_* +# Environment variables which begin with K3S_ will be preserved for the +# systemd service to use. Setting K3S_URL without explicitly setting +# a systemd exec command will default the command to "agent", and we +# enforce that K3S_TOKEN or K3S_CLUSTER_SECRET is also set. +# +# - INSTALL_K3S_SKIP_DOWNLOAD +# If set to true will not download k3s hash or binary. +# +# - INSTALL_K3S_SYMLINK +# If set to 'skip' will not create symlinks, 'force' will overwrite, +# default will symlink if command does not exist in path. +# +# - INSTALL_K3S_SKIP_ENABLE +# If set to true will not enable or start k3s service. +# +# - INSTALL_K3S_SKIP_START +# If set to true will not start k3s service. +# +# - INSTALL_K3S_VERSION +# Version of k3s to download from github. Will attempt to download from the +# stable channel if not specified. +# +# - INSTALL_K3S_COMMIT +# Commit of k3s to download from temporary cloud storage. +# * (for developer & QA use) +# +# - INSTALL_K3S_BIN_DIR +# Directory to install k3s binary, links, and uninstall script to, or use +# /usr/local/bin as the default +# +# - INSTALL_K3S_BIN_DIR_READ_ONLY +# If set to true will not write files to INSTALL_K3S_BIN_DIR, forces +# setting INSTALL_K3S_SKIP_DOWNLOAD=true +# +# - INSTALL_K3S_SYSTEMD_DIR +# Directory to install systemd service and environment files to, or use +# /etc/systemd/system as the default +# +# - INSTALL_K3S_EXEC or script arguments +# Command with flags to use for launching k3s in the systemd service, if +# the command is not specified will default to "agent" if K3S_URL is set +# or "server" if not. The final systemd command resolves to a combination +# of EXEC and script args ($@). +# +# The following commands result in the same behavior: +# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -s - +# curl ... | INSTALL_K3S_EXEC="server --disable=traefik" sh -s - +# curl ... | INSTALL_K3S_EXEC="server" sh -s - --disable=traefik +# curl ... | sh -s - server --disable=traefik +# curl ... | sh -s - --disable=traefik +# +# - INSTALL_K3S_NAME +# Name of systemd service to create, will default from the k3s exec command +# if not specified. If specified the name will be prefixed with 'k3s-'. +# +# - INSTALL_K3S_TYPE +# Type of systemd service to create, will default from the k3s exec command +# if not specified. +# +# - INSTALL_K3S_SELINUX_WARN +# If set to true will continue if k3s-selinux policy is not found. +# +# - INSTALL_K3S_SKIP_SELINUX_RPM +# If set to true will skip automatic installation of the k3s RPM. +# +# - INSTALL_K3S_CHANNEL_URL +# Channel URL for fetching k3s download URL. +# Defaults to 'https://update.k3s.io/v1-release/channels'. +# +# - INSTALL_K3S_CHANNEL +# Channel to use for fetching k3s download URL. +# Defaults to 'stable'. + +GITHUB_URL=https://github.com/rancher/k3s/releases +STORAGE_URL=https://storage.googleapis.com/k3s-ci-builds +DOWNLOADER= + +# --- helper functions for logs --- +info() +{ + echo '[INFO] ' "$@" +} +warn() +{ + echo '[WARN] ' "$@" >&2 +} +fatal() +{ + echo '[ERROR] ' "$@" >&2 + exit 1 +} + +# --- fatal if no systemd or openrc --- +verify_system() { + if [ -x /sbin/openrc-run ]; then + HAS_OPENRC=true + return + fi + if [ -d /run/systemd ]; then + HAS_SYSTEMD=true + return + fi + fatal 'Can not find systemd or openrc to use as a process supervisor for k3s' +} + +# --- add quotes to command arguments --- +quote() { + for arg in "$@"; do + printf '%s\n' "$arg" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/" + done +} + +# --- add indentation and trailing slash to quoted args --- +quote_indent() { + printf ' \\\n' + for arg in "$@"; do + printf '\t%s \\\n' "$(quote "$arg")" + done +} + +# --- escape most punctuation characters, except quotes, forward slash, and space --- +escape() { + printf '%s' "$@" | sed -e 's/\([][!#$%&()*;<=>?\_`{|}]\)/\\\1/g;' +} + +# --- escape double quotes --- +escape_dq() { + printf '%s' "$@" | sed -e 's/"/\\"/g' +} + +# --- ensures $K3S_URL is empty or begins with https://, exiting fatally otherwise --- +verify_k3s_url() { + case "${K3S_URL}" in + "") + ;; + https://*) + ;; + *) + fatal "Only https:// URLs are supported for K3S_URL (have ${K3S_URL})" + ;; + esac +} + +# --- define needed environment variables --- +setup_env() { + # --- use command args if passed or create default --- + case "$1" in + # --- if we only have flags discover if command should be server or agent --- + (-*|"") + if [ -z "${K3S_URL}" ]; then + CMD_K3S=server + else + if [ -z "${K3S_TOKEN}" ] && [ -z "${K3S_TOKEN_FILE}" ] && [ -z "${K3S_CLUSTER_SECRET}" ]; then + fatal "Defaulted k3s exec command to 'agent' because K3S_URL is defined, but K3S_TOKEN, K3S_TOKEN_FILE or K3S_CLUSTER_SECRET is not defined." + fi + CMD_K3S=agent + fi + ;; + # --- command is provided --- + (*) + CMD_K3S=$1 + shift + ;; + esac + + verify_k3s_url + + CMD_K3S_EXEC="${CMD_K3S}$(quote_indent "$@")" + + # --- use systemd name if defined or create default --- + if [ -n "${INSTALL_K3S_NAME}" ]; then + SYSTEM_NAME=k3s-${INSTALL_K3S_NAME} + else + if [ "${CMD_K3S}" = server ]; then + SYSTEM_NAME=k3s + else + SYSTEM_NAME=k3s-${CMD_K3S} + fi + fi + + # --- check for invalid characters in system name --- + valid_chars=$(printf '%s' "${SYSTEM_NAME}" | sed -e 's/[][!#$%&()*;<=>?\_`{|}/[:space:]]/^/g;' ) + if [ "${SYSTEM_NAME}" != "${valid_chars}" ]; then + invalid_chars=$(printf '%s' "${valid_chars}" | sed -e 's/[^^]/ /g') + fatal "Invalid characters for system name: + ${SYSTEM_NAME} + ${invalid_chars}" + fi + + # --- use sudo if we are not already root --- + SUDO=sudo + if [ $(id -u) -eq 0 ]; then + SUDO= + fi + + # --- use systemd type if defined or create default --- + if [ -n "${INSTALL_K3S_TYPE}" ]; then + SYSTEMD_TYPE=${INSTALL_K3S_TYPE} + else + if [ "${CMD_K3S}" = server ]; then + SYSTEMD_TYPE=notify + else + SYSTEMD_TYPE=exec + fi + fi + + # --- use binary install directory if defined or create default --- + if [ -n "${INSTALL_K3S_BIN_DIR}" ]; then + BIN_DIR=${INSTALL_K3S_BIN_DIR} + else + # --- use /usr/local/bin if root can write to it, otherwise use /opt/bin if it exists + BIN_DIR=/usr/local/bin + if ! $SUDO sh -c "touch ${BIN_DIR}/k3s-ro-test && rm -rf ${BIN_DIR}/k3s-ro-test"; then + if [ -d /opt/bin ]; then + BIN_DIR=/opt/bin + fi + fi + fi + + # --- use systemd directory if defined or create default --- + if [ -n "${INSTALL_K3S_SYSTEMD_DIR}" ]; then + SYSTEMD_DIR="${INSTALL_K3S_SYSTEMD_DIR}" + else + SYSTEMD_DIR=/etc/systemd/system + fi + + # --- set related files from system name --- + SERVICE_K3S=${SYSTEM_NAME}.service + UNINSTALL_K3S_SH=${UNINSTALL_K3S_SH:-${BIN_DIR}/${SYSTEM_NAME}-uninstall.sh} + KILLALL_K3S_SH=${KILLALL_K3S_SH:-${BIN_DIR}/k3s-killall.sh} + + # --- use service or environment location depending on systemd/openrc --- + if [ "${HAS_SYSTEMD}" = true ]; then + FILE_K3S_SERVICE=${SYSTEMD_DIR}/${SERVICE_K3S} + FILE_K3S_ENV=${SYSTEMD_DIR}/${SERVICE_K3S}.env + elif [ "${HAS_OPENRC}" = true ]; then + $SUDO mkdir -p /etc/rancher/k3s + FILE_K3S_SERVICE=/etc/init.d/${SYSTEM_NAME} + FILE_K3S_ENV=/etc/rancher/k3s/${SYSTEM_NAME}.env + fi + + # --- get hash of config & exec for currently installed k3s --- + PRE_INSTALL_HASHES=$(get_installed_hashes) + + # --- if bin directory is read only skip download --- + if [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ]; then + INSTALL_K3S_SKIP_DOWNLOAD=true + fi + + # --- setup channel values + INSTALL_K3S_CHANNEL_URL=${INSTALL_K3S_CHANNEL_URL:-'https://update.k3s.io/v1-release/channels'} + INSTALL_K3S_CHANNEL=${INSTALL_K3S_CHANNEL:-'stable'} +} + +# --- check if skip download environment variable set --- +can_skip_download() { + if [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != true ]; then + return 1 + fi +} + +# --- verify an executabe k3s binary is installed --- +verify_k3s_is_executable() { + if [ ! -x ${BIN_DIR}/k3s ]; then + fatal "Executable k3s binary not found at ${BIN_DIR}/k3s" + fi +} + +# --- set arch and suffix, fatal if architecture not supported --- +setup_verify_arch() { + if [ -z "$ARCH" ]; then + ARCH=$(uname -m) + fi + case $ARCH in + amd64) + ARCH=amd64 + SUFFIX= + ;; + x86_64) + ARCH=amd64 + SUFFIX= + ;; + arm64) + ARCH=arm64 + SUFFIX=-${ARCH} + ;; + aarch64) + ARCH=arm64 + SUFFIX=-${ARCH} + ;; + arm*) + ARCH=arm + SUFFIX=-${ARCH}hf + ;; + *) + fatal "Unsupported architecture $ARCH" + esac +} + +# --- verify existence of network downloader executable --- +verify_downloader() { + # Return failure if it doesn't exist or is no executable + [ -x "$(which $1)" ] || return 1 + + # Set verified executable as our downloader program and return success + DOWNLOADER=$1 + return 0 +} + +# --- create tempory directory and cleanup when done --- +setup_tmp() { + TMP_DIR=$(mktemp -d -t k3s-install.XXXXXXXXXX) + TMP_HASH=${TMP_DIR}/k3s.hash + TMP_BIN=${TMP_DIR}/k3s.bin + cleanup() { + code=$? + set +e + trap - EXIT + rm -rf ${TMP_DIR} + exit $code + } + trap cleanup INT EXIT +} + +# --- use desired k3s version if defined or find version from channel --- +get_release_version() { + if [ -n "${INSTALL_K3S_COMMIT}" ]; then + VERSION_K3S="commit ${INSTALL_K3S_COMMIT}" + elif [ -n "${INSTALL_K3S_VERSION}" ]; then + VERSION_K3S=${INSTALL_K3S_VERSION} + else + info "Finding release for channel ${INSTALL_K3S_CHANNEL}" + version_url="${INSTALL_K3S_CHANNEL_URL}/${INSTALL_K3S_CHANNEL}" + case $DOWNLOADER in + curl) + VERSION_K3S=$(curl -w '%{url_effective}' -L -s -S ${version_url} -o /dev/null | sed -e 's|.*/||') + ;; + wget) + VERSION_K3S=$(wget -SqO /dev/null ${version_url} 2>&1 | grep -i Location | sed -e 's|.*/||') + ;; + *) + fatal "Incorrect downloader executable '$DOWNLOADER'" + ;; + esac + fi + info "Using ${VERSION_K3S} as release" +} + +# --- download from github url --- +download() { + [ $# -eq 2 ] || fatal 'download needs exactly 2 arguments' + + case $DOWNLOADER in + curl) + curl -o $1 -sfL $2 + ;; + wget) + wget -qO $1 $2 + ;; + *) + fatal "Incorrect executable '$DOWNLOADER'" + ;; + esac + + # Abort if download command failed + [ $? -eq 0 ] || fatal 'Download failed' +} + +# --- download hash from github url --- +download_hash() { + if [ -n "${INSTALL_K3S_COMMIT}" ]; then + HASH_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}.sha256sum + else + HASH_URL=${GITHUB_URL}/download/${VERSION_K3S}/sha256sum-${ARCH}.txt + fi + info "Downloading hash ${HASH_URL}" + download ${TMP_HASH} ${HASH_URL} + HASH_EXPECTED=$(grep " k3s${SUFFIX}$" ${TMP_HASH}) + HASH_EXPECTED=${HASH_EXPECTED%%[[:blank:]]*} +} + +# --- check hash against installed version --- +installed_hash_matches() { + if [ -x ${BIN_DIR}/k3s ]; then + HASH_INSTALLED=$(sha256sum ${BIN_DIR}/k3s) + HASH_INSTALLED=${HASH_INSTALLED%%[[:blank:]]*} + if [ "${HASH_EXPECTED}" = "${HASH_INSTALLED}" ]; then + return + fi + fi + return 1 +} + +# --- download binary from github url --- +download_binary() { + if [ -n "${INSTALL_K3S_COMMIT}" ]; then + BIN_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT} + else + BIN_URL=${GITHUB_URL}/download/${VERSION_K3S}/k3s${SUFFIX} + fi + info "Downloading binary ${BIN_URL}" + download ${TMP_BIN} ${BIN_URL} +} + +# --- verify downloaded binary hash --- +verify_binary() { + info "Verifying binary download" + HASH_BIN=$(sha256sum ${TMP_BIN}) + HASH_BIN=${HASH_BIN%%[[:blank:]]*} + if [ "${HASH_EXPECTED}" != "${HASH_BIN}" ]; then + fatal "Download sha256 does not match ${HASH_EXPECTED}, got ${HASH_BIN}" + fi +} + +# --- setup permissions and move binary to system directory --- +setup_binary() { + chmod 755 ${TMP_BIN} + info "Installing k3s to ${BIN_DIR}/k3s" + $SUDO chown root:root ${TMP_BIN} + $SUDO mv -f ${TMP_BIN} ${BIN_DIR}/k3s +} + +# --- setup selinux policy --- +setup_selinux() { + case ${INSTALL_K3S_CHANNEL} in + *testing) + rpm_channel=testing + ;; + *latest) + rpm_channel=latest + ;; + *) + rpm_channel=stable + ;; + esac + + rpm_site="rpm.rancher.io" + if [ "${rpm_channel}" = "testing" ]; then + rpm_site="rpm-testing.rancher.io" + fi + + policy_hint="please install: + yum install -y container-selinux selinux-policy-base + yum install -y https://${rpm_site}/k3s/${rpm_channel}/common/centos/7/noarch/k3s-selinux-0.2-1.el7_8.noarch.rpm +" + policy_error=fatal + if [ "$INSTALL_K3S_SELINUX_WARN" = true ] || grep -q 'ID=flatcar' /etc/os-release; then + policy_error=warn + fi + + if [ "$INSTALL_K3S_SKIP_SELINUX_RPM" = true ] || can_skip_download; then + info "Skipping installation of SELinux RPM" + else + install_selinux_rpm ${rpm_site} ${rpm_channel} + fi + + if ! $SUDO chcon -u system_u -r object_r -t container_runtime_exec_t ${BIN_DIR}/k3s >/dev/null 2>&1; then + if $SUDO grep '^\s*SELINUX=enforcing' /etc/selinux/config >/dev/null 2>&1; then + $policy_error "Failed to apply container_runtime_exec_t to ${BIN_DIR}/k3s, ${policy_hint}" + fi + else + if [ ! -f /usr/share/selinux/packages/k3s.pp ]; then + $policy_error "Failed to find the k3s-selinux policy, ${policy_hint}" + fi + fi +} + +# --- if on an el7/el8 system, install k3s-selinux +install_selinux_rpm() { + if [ -r /etc/redhat-release ] || [ -r /etc/centos-release ] || [ -r /etc/oracle-release ]; then + dist_version="$(. /etc/os-release && echo "$VERSION_ID")" + maj_ver=$(echo "$dist_version" | sed -E -e "s/^([0-9]+)\.?[0-9]*$/\1/") + if [ -r /etc/redhat-release ]; then + case ${maj_ver} in + 7) + $SUDO yum -y install yum-utils + $SUDO yum-config-manager --enable rhel-7-server-extras-rpms + ;; + 8) + : + ;; + *) + return + ;; + esac + fi + $SUDO rm -f /etc/yum.repos.d/rancher-k3s-common*.repo + $SUDO tee /etc/yum.repos.d/rancher-k3s-common.repo >/dev/null << EOF +[rancher-k3s-common-${2}] +name=Rancher K3s Common (${2}) +baseurl=https://${1}/k3s/${2}/common/centos/${maj_ver}/noarch +enabled=1 +gpgcheck=1 +gpgkey=https://${1}/public.key +EOF + $SUDO yum -y install "k3s-selinux" + fi + return +} + +# --- download and verify k3s --- +download_and_verify() { + if can_skip_download; then + info 'Skipping k3s download and verify' + verify_k3s_is_executable + return + fi + + setup_verify_arch + verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files' + setup_tmp + get_release_version + download_hash + + if installed_hash_matches; then + info 'Skipping binary downloaded, installed k3s matches hash' + return + fi + + download_binary + verify_binary + setup_binary +} + +# --- add additional utility links --- +create_symlinks() { + [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return + [ "${INSTALL_K3S_SYMLINK}" = skip ] && return + + for cmd in kubectl crictl ctr; do + if [ ! -e ${BIN_DIR}/${cmd} ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; then + which_cmd=$(which ${cmd} 2>/dev/null || true) + if [ -z "${which_cmd}" ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; then + info "Creating ${BIN_DIR}/${cmd} symlink to k3s" + $SUDO ln -sf k3s ${BIN_DIR}/${cmd} + else + info "Skipping ${BIN_DIR}/${cmd} symlink to k3s, command exists in PATH at ${which_cmd}" + fi + else + info "Skipping ${BIN_DIR}/${cmd} symlink to k3s, already exists" + fi + done +} + +# --- create killall script --- +create_killall() { + [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return + info "Creating killall script ${KILLALL_K3S_SH}" + $SUDO tee ${KILLALL_K3S_SH} >/dev/null << \EOF +#!/bin/sh +[ $(id -u) -eq 0 ] || exec sudo $0 $@ + +for bin in /var/lib/rancher/k3s/data/**/bin/; do + [ -d $bin ] && export PATH=$PATH:$bin:$bin/aux +done + +set -x + +for service in /etc/systemd/system/k3s*.service; do + [ -s $service ] && systemctl stop $(basename $service) +done + +for service in /etc/init.d/k3s*; do + [ -x $service ] && $service stop +done + +pschildren() { + ps -e -o ppid= -o pid= | \ + sed -e 's/^\s*//g; s/\s\s*/\t/g;' | \ + grep -w "^$1" | \ + cut -f2 +} + +pstree() { + for pid in $@; do + echo $pid + for child in $(pschildren $pid); do + pstree $child + done + done +} + +killtree() { + kill -9 $( + { set +x; } 2>/dev/null; + pstree $@; + set -x; + ) 2>/dev/null +} + +getshims() { + ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'k3s/data/[^/]*/bin/containerd-shim' | cut -f1 +} + +killtree $({ set +x; } 2>/dev/null; getshims; set -x) + +do_unmount_and_remove() { + awk -v path="$1" '$2 ~ ("^" path) { print $2 }' /proc/self/mounts | sort -r | xargs -r -t -n 1 sh -c 'umount "$0" && rm -rf "$0"' +} + +do_unmount_and_remove '/run/k3s' +do_unmount_and_remove '/var/lib/rancher/k3s' +do_unmount_and_remove '/var/lib/kubelet/pods' +do_unmount_and_remove '/run/netns/cni-' + +# Remove CNI namespaces +ip netns show 2>/dev/null | grep cni- | xargs -r -t -n 1 ip netns delete + +# Delete network interface(s) that match 'master cni0' +ip link show 2>/dev/null | grep 'master cni0' | while read ignore iface ignore; do + iface=${iface%%@*} + [ -z "$iface" ] || ip link delete $iface +done +ip link delete cni0 +ip link delete flannel.1 +rm -rf /var/lib/cni/ +iptables-save | grep -v KUBE- | grep -v CNI- | iptables-restore +EOF + $SUDO chmod 755 ${KILLALL_K3S_SH} + $SUDO chown root:root ${KILLALL_K3S_SH} +} + +# --- create uninstall script --- +create_uninstall() { + [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return + info "Creating uninstall script ${UNINSTALL_K3S_SH}" + $SUDO tee ${UNINSTALL_K3S_SH} >/dev/null << EOF +#!/bin/sh +set -x +[ \$(id -u) -eq 0 ] || exec sudo \$0 \$@ + +${KILLALL_K3S_SH} + +if which systemctl; then + systemctl disable ${SYSTEM_NAME} + systemctl reset-failed ${SYSTEM_NAME} + systemctl daemon-reload +fi +if which rc-update; then + rc-update delete ${SYSTEM_NAME} default +fi + +rm -f ${FILE_K3S_SERVICE} +rm -f ${FILE_K3S_ENV} + +remove_uninstall() { + rm -f ${UNINSTALL_K3S_SH} +} +trap remove_uninstall EXIT + +if (ls ${SYSTEMD_DIR}/k3s*.service || ls /etc/init.d/k3s*) >/dev/null 2>&1; then + set +x; echo 'Additional k3s services installed, skipping uninstall of k3s'; set -x + exit +fi + +for cmd in kubectl crictl ctr; do + if [ -L ${BIN_DIR}/\$cmd ]; then + rm -f ${BIN_DIR}/\$cmd + fi +done + +rm -rf /etc/rancher/k3s +rm -rf /run/k3s +rm -rf /run/flannel +rm -rf /var/lib/rancher/k3s +rm -rf /var/lib/kubelet +rm -f ${BIN_DIR}/k3s +rm -f ${KILLALL_K3S_SH} + +if type yum >/dev/null 2>&1; then + yum remove -y k3s-selinux + rm -f /etc/yum.repos.d/rancher-k3s-common*.repo +fi +EOF + $SUDO chmod 755 ${UNINSTALL_K3S_SH} + $SUDO chown root:root ${UNINSTALL_K3S_SH} +} + +# --- disable current service if loaded -- +systemd_disable() { + $SUDO rm -f /etc/systemd/system/${SERVICE_K3S} || true + $SUDO rm -f /etc/systemd/system/${SERVICE_K3S}.env || true + $SUDO systemctl disable ${SYSTEM_NAME} >/dev/null 2>&1 || true +} + +# --- capture current env and create file containing k3s_ variables --- +create_env_file() { + info "env: Creating environment file ${FILE_K3S_ENV}" + UMASK=$(umask) + umask 0377 + env | grep '^K3S_' | $SUDO tee ${FILE_K3S_ENV} >/dev/null + env | egrep -i '^(NO|HTTP|HTTPS)_PROXY' | $SUDO tee -a ${FILE_K3S_ENV} >/dev/null + umask $UMASK +} + +# --- write systemd service file --- +create_systemd_service_file() { + info "systemd: Creating service file ${FILE_K3S_SERVICE}" + $SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF +[Unit] +Description=Lightweight Kubernetes +Documentation=https://k3s.io +Wants=network-online.target +After=network-online.target + +[Install] +WantedBy=multi-user.target + +[Service] +Type=${SYSTEMD_TYPE} +EnvironmentFile=${FILE_K3S_ENV} +KillMode=process +Delegate=yes +# Having non-zero Limit*s causes performance problems due to accounting overhead +# in the kernel. We recommend using cgroups to do container-local accounting. +LimitNOFILE=1048576 +LimitNPROC=infinity +LimitCORE=infinity +TasksMax=infinity +TimeoutStartSec=0 +Restart=always +RestartSec=5s +ExecStartPre=-/sbin/modprobe br_netfilter +ExecStartPre=-/sbin/modprobe overlay +ExecStart=${BIN_DIR}/k3s \\ + ${CMD_K3S_EXEC} + +EOF +} + +# --- write openrc service file --- +create_openrc_service_file() { + LOG_FILE=/var/log/${SYSTEM_NAME}.log + + info "openrc: Creating service file ${FILE_K3S_SERVICE}" + $SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF +#!/sbin/openrc-run + +depend() { + after network-online + want cgroups +} + +start_pre() { + rm -f /tmp/k3s.* +} + +supervisor=supervise-daemon +name=${SYSTEM_NAME} +command="${BIN_DIR}/k3s" +command_args="$(escape_dq "${CMD_K3S_EXEC}") + >>${LOG_FILE} 2>&1" + +output_log=${LOG_FILE} +error_log=${LOG_FILE} + +pidfile="/var/run/${SYSTEM_NAME}.pid" +respawn_delay=5 +respawn_max=0 + +set -o allexport +if [ -f /etc/environment ]; then source /etc/environment; fi +if [ -f ${FILE_K3S_ENV} ]; then source ${FILE_K3S_ENV}; fi +set +o allexport +EOF + $SUDO chmod 0755 ${FILE_K3S_SERVICE} + + $SUDO tee /etc/logrotate.d/${SYSTEM_NAME} >/dev/null << EOF +${LOG_FILE} { + missingok + notifempty + copytruncate +} +EOF +} + +# --- write systemd or openrc service file --- +create_service_file() { + [ "${HAS_SYSTEMD}" = true ] && create_systemd_service_file + [ "${HAS_OPENRC}" = true ] && create_openrc_service_file + return 0 +} + +# --- get hashes of the current k3s bin and service files +get_installed_hashes() { + $SUDO sha256sum ${BIN_DIR}/k3s ${FILE_K3S_SERVICE} ${FILE_K3S_ENV} 2>&1 || true +} + +# --- enable and start systemd service --- +systemd_enable() { + info "systemd: Enabling ${SYSTEM_NAME} unit" + $SUDO systemctl enable ${FILE_K3S_SERVICE} >/dev/null + $SUDO systemctl daemon-reload >/dev/null +} + +systemd_start() { + info "systemd: Starting ${SYSTEM_NAME}" + $SUDO systemctl restart ${SYSTEM_NAME} +} + +# --- enable and start openrc service --- +openrc_enable() { + info "openrc: Enabling ${SYSTEM_NAME} service for default runlevel" + $SUDO rc-update add ${SYSTEM_NAME} default >/dev/null +} + +openrc_start() { + info "openrc: Starting ${SYSTEM_NAME}" + $SUDO ${FILE_K3S_SERVICE} restart +} + +# --- startup systemd or openrc service --- +service_enable_and_start() { + [ "${INSTALL_K3S_SKIP_ENABLE}" = true ] && return + + [ "${HAS_SYSTEMD}" = true ] && systemd_enable + [ "${HAS_OPENRC}" = true ] && openrc_enable + + [ "${INSTALL_K3S_SKIP_START}" = true ] && return + + POST_INSTALL_HASHES=$(get_installed_hashes) + if [ "${PRE_INSTALL_HASHES}" = "${POST_INSTALL_HASHES}" ]; then + info 'No change detected so skipping service start' + return + fi + + [ "${HAS_SYSTEMD}" = true ] && systemd_start + [ "${HAS_OPENRC}" = true ] && openrc_start + return 0 +} + +# --- re-evaluate args to include env command --- +eval set -- $(escape "${INSTALL_K3S_EXEC}") $(quote "$@") + +# --- run the install process -- +{ + verify_system + setup_env "$@" + download_and_verify + setup_selinux + create_symlinks + create_killall + create_uninstall + systemd_disable + create_env_file + create_service_file + service_enable_and_start +}