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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,182 +1,181 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "log" | ||
| "time" | ||
| "flag" | ||
| "log" | ||
| "time" | ||
|
|
||
| "github.com/samalba/dockerclient" | ||
| "github.com/samalba/dockerclient" | ||
| ) | ||
|
|
||
| var ( | ||
| addr = flag.String("a", "unix:///var/run/docker.sock", "address of docker daemon") | ||
| ageContainer = flag.Duration("ca", 4*7*24*time.Hour, "Max container age") | ||
| ageImage = flag.Duration("ia", 4*7*24*time.Hour, "Max images age") | ||
| interval = flag.Duration("r", 0, "Run continously in given interval") | ||
|
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||
| dry = flag.Bool("dry", false, "Dry run; do not actually delete") | ||
| unsafe = flag.Bool("u", false, "Unsafe; Delete container without FinishedAt field set") | ||
| verbose = flag.Bool("v", false, "Be verbose") | ||
| now = time.Now() | ||
| addr = flag.String("a", "unix:///var/run/docker.sock", "address of docker daemon") | ||
| ageContainer = flag.Duration("ca", 4*7*24*time.Hour, "Max container age") | ||
| ageImage = flag.Duration("ia", 4*7*24*time.Hour, "Max images age") | ||
| interval = flag.Duration("r", 0, "Run continously in given interval") | ||
| dry = flag.Bool("dry", false, "Dry run; do not actually delete") | ||
| unsafe = flag.Bool("u", false, "Unsafe; Delete container without FinishedAt field set") | ||
| verbose = flag.Bool("v", false, "Be verbose") | ||
| now = time.Now() | ||
| ) | ||
|
|
||
| func debug(fs string, args ...interface{}) { | ||
| if *verbose { | ||
| log.Printf(fs, args...) | ||
| } | ||
| if *verbose { | ||
| log.Printf(fs, args...) | ||
| } | ||
| } | ||
|
|
||
| func main() { | ||
| flag.Parse() | ||
|
|
||
| for { | ||
| client, err := dockerclient.NewDockerClient(*addr, nil) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
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| expiredContainers, err := getExpiredContainers(client) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| if err := removeContainers(client, expiredContainers); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if err := removeImages(client); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if *interval == 0 { | ||
| break | ||
| } | ||
| log.Printf("Sleeping for %s", *interval) | ||
| time.Sleep(*interval) | ||
| } | ||
| flag.Parse() | ||
|
|
||
| for { | ||
| client, err := dockerclient.NewDockerClient(*addr, nil) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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||
| expiredContainers, err := getExpiredContainers(client) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| if err := removeContainers(client, expiredContainers); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if err := removeImages(client); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if *interval == 0 { | ||
| break | ||
| } | ||
| log.Printf("Sleeping for %s", *interval) | ||
| time.Sleep(*interval) | ||
| } | ||
| } | ||
|
|
||
| func getExpiredContainers(client *dockerclient.DockerClient) (expiredContainers []*dockerclient.ContainerInfo, err error) { | ||
| containers, err := client.ListContainers(true, false, "") // true = all containers | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| usedVolumeContainers := map[string]int{} | ||
| usedImages := map[string]int{} | ||
| oldContainers := []*dockerclient.ContainerInfo{} | ||
| for _, c := range containers { | ||
| debug("< container: %s", c.Id) | ||
| container, err := client.InspectContainer(c.Id) | ||
| if err != nil { | ||
| debug(" + Couldn't inspect container %s, skipping: %s", c.Id, err) | ||
| continue | ||
| } | ||
|
|
||
| // Increment reference counter refering to how many containers use volume container and image | ||
| if len(container.HostConfig.VolumesFrom) > 0 { | ||
| for _, vc := range container.HostConfig.VolumesFrom { | ||
| usedVolumeContainers[vc]++ | ||
| } | ||
| } | ||
| debug(" + Container %s uses image %s", c.Id, container.Image) | ||
| usedImages[container.Image]++ | ||
|
|
||
| if container.State.Running { | ||
| debug(" + Container is still running") | ||
| continue | ||
| } | ||
| debug(" + not running") | ||
|
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||
| if container.State.FinishedAt == time.Date(1, 1, 1, 0, 0, 0, 0, time.UTC) && !*unsafe { | ||
| debug(" + Container %s has empty FinishedAt field, skipping", c.Id) | ||
| continue | ||
| } | ||
| created, err := time.Parse(time.RFC3339, container.Created) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| debug(" + Container and image threshold %s", now.Add(-*ageContainer)) | ||
| if created.After(now.Add(-*ageContainer)) { | ||
| debug(" + Creation time is not old enough: %s", created) | ||
| continue | ||
| } | ||
| debug(" + Creation time is older than %s", *ageContainer) | ||
| if container.State.FinishedAt.After(now.Add(-*ageContainer)) { | ||
| debug(" + Exit time is not old enough: %s", container.State.FinishedAt) | ||
| continue | ||
| } | ||
| debug(" + Exit time is older than %s", *ageContainer) | ||
|
|
||
| // Decrement reference counter for old containers | ||
| if len(container.HostConfig.VolumesFrom) > 0 { | ||
| for _, vc := range container.HostConfig.VolumesFrom { | ||
| usedVolumeContainers[vc]-- | ||
| } | ||
| } | ||
| usedImages[container.Image]-- | ||
|
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| oldContainers = append(oldContainers, container) | ||
| } | ||
|
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| for _, c := range oldContainers { | ||
| name := c.Name[1:] // Remove leading / | ||
| if usedVolumeContainers[name] > 0 { | ||
| continue | ||
| } | ||
| expiredContainers = append(expiredContainers, c) | ||
| } | ||
| log.Printf("Found %d expired containers", len(expiredContainers)) | ||
|
|
||
| return expiredContainers, nil | ||
| containers, err := client.ListContainers(true, false, "") // true = all containers | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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||
| usedVolumeContainers := map[string]int{} | ||
| usedImages := map[string]int{} | ||
| oldContainers := []*dockerclient.ContainerInfo{} | ||
| for _, c := range containers { | ||
| debug("< container: %s", c.Id) | ||
| container, err := client.InspectContainer(c.Id) | ||
| if err != nil { | ||
| debug(" + Couldn't inspect container %s, skipping: %s", c.Id, err) | ||
| continue | ||
| } | ||
|
|
||
| // Increment reference counter refering to how many containers use volume container and image | ||
| if len(container.HostConfig.VolumesFrom) > 0 { | ||
| for _, vc := range container.HostConfig.VolumesFrom { | ||
| usedVolumeContainers[vc]++ | ||
| } | ||
| } | ||
| debug(" + Container %s uses image %s", c.Id, container.Image) | ||
| usedImages[container.Image]++ | ||
|
|
||
| if container.State.Running { | ||
| debug(" + Container is still running") | ||
| continue | ||
| } | ||
| debug(" + not running") | ||
|
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||
| if container.State.FinishedAt == time.Date(1, 1, 1, 0, 0, 0, 0, time.UTC) && !*unsafe { | ||
| debug(" + Container %s has empty FinishedAt field, skipping", c.Id) | ||
| continue | ||
| } | ||
| created, err := time.Parse(time.RFC3339, container.Created) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| debug(" + Container and image threshold %s", now.Add(-*ageContainer)) | ||
| if created.After(now.Add(-*ageContainer)) { | ||
| debug(" + Creation time is not old enough: %s", created) | ||
| continue | ||
| } | ||
| debug(" + Creation time is older than %s", *ageContainer) | ||
| if container.State.FinishedAt.After(now.Add(-*ageContainer)) { | ||
| debug(" + Exit time is not old enough: %s", container.State.FinishedAt) | ||
| continue | ||
| } | ||
| debug(" + Exit time is older than %s", *ageContainer) | ||
|
|
||
| // Decrement reference counter for old containers | ||
| if len(container.HostConfig.VolumesFrom) > 0 { | ||
| for _, vc := range container.HostConfig.VolumesFrom { | ||
| usedVolumeContainers[vc]-- | ||
| } | ||
| } | ||
| usedImages[container.Image]-- | ||
|
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| oldContainers = append(oldContainers, container) | ||
| } | ||
|
|
||
| for _, c := range oldContainers { | ||
| name := c.Name[1:] // Remove leading / | ||
| if usedVolumeContainers[name] > 0 { | ||
| continue | ||
| } | ||
| expiredContainers = append(expiredContainers, c) | ||
| } | ||
| log.Printf("Found %d expired containers", len(expiredContainers)) | ||
|
|
||
| return expiredContainers, nil | ||
| } | ||
|
|
||
| // Search for all images that have expired based on operator input and try to | ||
| // remove them. If they are currently being used, the remvoal will fail, but that | ||
| // is OK. | ||
| func removeImages(client *dockerclient.DockerClient) error { | ||
| expiredImages := []*dockerclient.Image{} | ||
| images, err := client.ListImages(true) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, image := range images { | ||
| debug("< image id: %s", image.Id) | ||
| ctime := time.Unix(image.Created, 0) | ||
| if ctime.After(now.Add(-*ageImage)) { | ||
| continue | ||
| } | ||
| debug(" + older than %s", *ageImage) | ||
| expiredImages = append(expiredImages, image) | ||
| } | ||
|
|
||
| log.Printf("Found %d expired images", len(expiredImages)) | ||
|
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| for _, image := range expiredImages { | ||
| log.Print("rmi ", image.Id) | ||
| if !*dry { | ||
| if _, err := client.RemoveImage(image.Id, false); err != nil { | ||
| debug("Couldn't remove image with ID %s. Let's try to remove the same image, but this time using repo tags: %s", image.Id, err) | ||
| for _, repoTag := range image.RepoTags { | ||
| log.Print("rmi ", repoTag) | ||
| if _, err := client.RemoveImage(repoTag, false); err != nil { | ||
| debug("Couldn't remove image with repo tag %s: %s", repoTag, err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| expiredImages := []*dockerclient.Image{} | ||
| images, err := client.ListImages(true) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, image := range images { | ||
| debug("< image id: %s", image.Id) | ||
| ctime := time.Unix(image.Created, 0) | ||
| if ctime.After(now.Add(-*ageImage)) { | ||
| continue | ||
| } | ||
| debug(" + older than %s", *ageImage) | ||
| expiredImages = append(expiredImages, image) | ||
| } | ||
|
|
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| log.Printf("Found %d expired images", len(expiredImages)) | ||
|
|
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| for _, image := range expiredImages { | ||
| log.Print("rmi ", image.Id) | ||
| if !*dry { | ||
| if _, err := client.RemoveImage(image.Id, false); err != nil { | ||
| debug("Couldn't remove image with ID %s. Let's try to remove the same image, but this time using repo tags: %s", image.Id, err) | ||
| for _, repoTag := range image.RepoTags { | ||
| log.Print("rmi ", repoTag) | ||
| if _, err := client.RemoveImage(repoTag, false); err != nil { | ||
| debug("Couldn't remove image with repo tag %s: %s", repoTag, err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func removeContainers(client *dockerclient.DockerClient, containers []*dockerclient.ContainerInfo) error { | ||
| for _, container := range containers { | ||
| log.Printf("rm %s (%s)", container.Id, container.Name) | ||
| if !*dry { | ||
| if err := client.RemoveContainer(container.Id, false, false); err != nil { | ||
| debug("Couldn't remove container: %s", err) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| for _, container := range containers { | ||
| log.Printf("rm %s (%s)", container.Id, container.Name) | ||
| if !*dry { | ||
| if err := client.RemoveContainer(container.Id, false, false); err != nil { | ||
| debug("Couldn't remove container: %s", err) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } |