/
dockercleaner.go
187 lines (167 loc) · 4.45 KB
/
dockercleaner.go
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package main
import (
"flag"
"fmt"
"log"
"time"
"github.com/samalba/dockerclient"
)
var (
cleanOld string
cleanNone bool
stopOld string
dockerURL string
noConfirm bool
)
func init() {
flag.StringVar(&dockerURL, "docker", "unix:///var/run/docker.sock", "Connection to Docker.")
flag.StringVar(&cleanOld, "clean-old", "", "Delete all images older than this. Use units: 'h','m','s'")
flag.BoolVar(&cleanNone, "clean-none", false, "Delete all untagged images. (<none>:<none>)")
flag.StringVar(&stopOld, "stop-old", "", "Stop all container stat are running longer then this. Use units: 'h','m','s'")
flag.BoolVar(&noConfirm, "yes", false, "Do not require confirmation.")
}
func stopCotainers(docker *dockerclient.DockerClient, imageIDs []string) []error {
var errors []error
if !noConfirm {
var answer string
fmt.Printf("This will stop %v images\n", len(imageIDs))
fmt.Printf("Do you want to continue? (yes/no)\n")
fmt.Scanln(&answer)
if answer != "yes" {
fmt.Printf("%v", answer)
return nil
}
}
for _, imageID := range imageIDs {
stopErr := docker.StopContainer(imageID, 10)
if stopErr != nil {
errors = append(errors, stopErr)
} else {
log.Printf("STOPPED: %v", imageID)
}
}
if len(errors) > 0 {
return errors
}
return nil
}
func deleteImage(docker *dockerclient.DockerClient, imageIDs []string) []error {
var errors []error
if !noConfirm {
var answer string
fmt.Printf("This will delete %v images\n", len(imageIDs))
fmt.Printf("Do you want to continue? (yes/no)\n")
fmt.Scanln(&answer)
if answer != "yes" {
fmt.Printf("%v", answer)
return nil
}
}
for _, imageID := range imageIDs {
imageDelete, deleteErr := docker.RemoveImage(imageID)
if deleteErr != nil {
errors = append(errors, deleteErr)
}
for _, id := range imageDelete {
if id.Deleted != "" {
log.Printf("DELETED: %v", id.Deleted)
}
if id.Untagged != "" {
log.Printf("UNTAGGED: %#v", id.Untagged)
}
}
}
if len(errors) > 0 {
return errors
}
return nil
}
func main() {
flag.Parse()
// check if there is an action
if !cleanNone && cleanOld == "" && stopOld == "" {
flag.Usage()
return
}
var (
toDelete []string
toStop []string
)
docker, dockerErr := dockerclient.NewDockerClient(dockerURL, nil)
if dockerErr != nil {
log.Fatalf("%v\n", dockerErr)
}
// Use system time from docker daemon for computing how old image is
info, infoErr := docker.Info()
if infoErr != nil {
log.Fatalf("%v\n", infoErr)
}
systemTime := info.SystemTime.Unix()
// Stop old containers
if stopOld != "" {
durationRunning, durationRunningErr := time.ParseDuration(stopOld)
if durationRunningErr != nil {
log.Fatalf("%v", durationRunningErr)
}
log.Printf("Stoppping containers that are running longer than: %v", durationRunning)
running, runningErr := docker.ListContainers(false, false, "")
if runningErr != nil {
log.Fatalf("%v", runningErr)
}
for _, c := range running {
containerAge := systemTime - c.Created
log.Printf("%v", containerAge)
if containerAge > int64(durationRunning.Seconds()) {
log.Printf("Going to stop container %v, %v", c.Id, c.Status)
toStop = append(toStop, c.Id)
}
}
stopErrs := stopCotainers(docker, toStop)
if stopErrs != nil {
for _, stopErr := range stopErrs {
log.Printf("%v", stopErr)
}
}
}
var images []*dockerclient.Image
var errorList error
// Get image list only when cleaning images
if cleanOld != "" || cleanNone {
images, errorList = docker.ListImages()
if errorList != nil {
log.Fatalf("%v", errorList)
}
}
// Old images
if cleanOld != "" {
duration, durationErr := time.ParseDuration(cleanOld)
if durationErr != nil {
log.Fatalf("%v", durationErr)
}
for _, image := range images {
imageAge := systemTime - image.Created
if imageAge > int64(duration.Seconds()) {
log.Printf("Going to delete %v (%v) because image is older then %v", image.Id, image.RepoTags, duration)
toDelete = append(toDelete, image.Id)
}
}
}
// Untaged images
if cleanNone {
for _, image := range images {
if len(image.RepoTags) == 1 && image.RepoTags[0] == "<none>:<none>" {
log.Printf("Going to delete %v (%v) becouse it is not tagged", image.Id, image.RepoTags)
toDelete = append(toDelete, image.Id)
}
}
}
// Delete images
if cleanOld != "" || cleanNone {
deleteErrs := deleteImage(docker, toDelete)
if deleteErrs != nil {
for _, deleteErr := range deleteErrs {
log.Printf("%v", deleteErr)
}
}
}
}