Merge pull request #21 from ehh-why-its-so-hard/implement_lb

feat: add jenkins role

roles/java/tasks/main.yaml

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+---
+- name: Install Required packages
+  ansible.builtin.apt:
+    name:
+      - openjdk-17-jdk

roles/jenkins_master/defaults/main.yaml

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+---
+jenkins_master_version: '2.452.4'
+
+jenkins_master_with_zfs: false
+jenkins_master_zfs_device: /dev/sdb

roles/jenkins_master/files/etc/systemd/system/jenkins.service.d/override.conf

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+[Service]
+Environment="JAVA_OPTS=-Djava.awt.headless=true -Xms6144m -Xmx6144m"
+Environment="JENKINS_OPTS=--sessionTimeout=10080 --sessionEviction=259200"
+Environment="JENKINS_HOME=/home/jenkins"
+TimeoutSec=900

roles/jenkins_master/handlers/main.yaml

@@ -0,0 +1,10 @@
+---
+- name: "Reload systemd config"
+  ansible.builtin.systemd:
+    daemon_reload: "yes"
+
+- name: "Restart jenkins"
+  ansible.builtin.systemd:
+    name: jenkins
+    enabled: true
+    state: restarted

roles/jenkins_master/tasks/main.yaml

@@ -0,0 +1,69 @@
+---
+- name: Setup ZFS
+  ansible.builtin.import_tasks: zfs.yaml
+  when: jenkins_master_with_zfs
+
+- name: Ensure jenkins home exists
+  ansible.builtin.file:
+    path: "{{- item -}}"
+    state: directory
+    mode: '0755'
+    owner: jenkins
+    group: jenkins
+  with_items:
+    - /home/jenkins
+    - /home/jenkins/jobs
+
+- name: Add an Apt signing key for Jenkins apt repo
+  ansible.builtin.apt_key:
+    url: https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
+    state: present
+
+- name: Add Jenkins apt repo into sources list
+  ansible.builtin.apt_repository:
+    repo: deb https://pkg.jenkins.io/debian-stable binary/
+    state: present
+    update_cache: "yes"
+    filename: jenkins
+
+- name: Install Required packages
+  ansible.builtin.apt:
+    name:
+      - openjdk-17-jdk
+
+- name: Install Jenkins
+  ansible.builtin.apt:
+    name:
+      - "jenkins={{ jenkins_master_version }}"
+  notify:
+    - "Reload systemd config"
+    - "Restart jenkins"
+
+
+- name: Create a directory if it does not exist
+  ansible.builtin.file:
+    path: /etc/systemd/system/jenkins.service.d/
+    state: directory
+    mode: '0755'
+
+
+- name: Copy jenkins.service.d config
+  ansible.builtin.copy:
+    src: 'etc/systemd/system/jenkins.service.d/override.conf'
+    dest: '/etc/systemd/system/jenkins.service.d/override.conf'
+    owner: 'root'
+    group: 'root'
+    mode: "0644"
+  notify:
+    - "Reload systemd config"
+    - "Restart jenkins"
+
+- name: Restart jenkins periodically
+  become: true
+  ansible.builtin.cron:
+    name: "restart jenkins"
+    minute: "0"
+    hour: "5" # 5AM UTC
+    weekday: "1" # monday
+    user: root
+    job: "/usr/bin/systemctl restart jenkins.service"

roles/jenkins_master/tasks/zfs.yaml

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+---
+- name: Create pool
+  ansible.builtin.shell: |
+    set -o pipefail
+
+    zpool create -f -o ashift=12 "jenkins_pool" "{{- jenkins_master_zfs_device -}}";
+    zfs set atime=off "jenkins_pool";
+    zfs set compression=zstd "jenkins_pool";
+    # enable improved extended attributes - keep in inode instead of dir;
+    zfs set xattr=sa "jenkins_pool";
+    # reduce amount of metadata (may improve random writes);
+    zfs set redundant_metadata=most "jenkins_pool";
+
+    touch "/.zfs_pool"
+  args:
+    executable: /bin/bash
+    creates: "/.zfs_pool"
+
+- name: Create dataset
+  ansible.builtin.shell: |
+    set -o pipefail
+
+    mkdir -p "{{- item.mount_point -}}";
+    zfs create "{{- item.dataset_name -}}";
+    zfs set atime=off "{{- item.dataset_name -}}";
+    zfs set compression=zstd "{{- item.dataset_name -}}";
+    # enable improved extended attributes - keep in inode instead of dir;
+    zfs set xattr=sa "{{- item.dataset_name -}}";
+    # reduce amount of metadata (may improve random writes);
+    zfs set redundant_metadata=most "{{- item.dataset_name -}}";
+    zfs set mountpoint="{{- item.mount_point -}}" "{{- item.dataset_name -}}";
+
+    touch "{{- item.mount_point -}}/.zfs_pool"
+  args:
+    executable: /bin/bash
+    creates: "{{- item.mount_point -}}/.zfs_pool"
+  with_items:
+    - dataset_name: "jenkins_pool/home"
+      mount_point: "/home/jenkins"
+    - dataset_name: "jenkins_pool/home/jobs"
+      mount_point: "jenkins_pool/home/jobs"