/
main.go
210 lines (188 loc) · 5.05 KB
/
main.go
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package main
import (
"context"
"fmt"
"os"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/client"
"github.com/urfave/cli/v2"
)
type item struct {
ID string
Description string
}
type items struct {
Containers []item
Images []item
Networks []item
Volumes []item
}
func main() {
app := &cli.App{
Name: "docker-brennen",
Usage: "cleanup unused Docker resources",
HideHelpCommand: true,
Flags: []cli.Flag{
&cli.BoolFlag{
Name: "force",
Aliases: []string{"f"},
Usage: "remove resources without confirmation prompt",
},
},
Action: func(c *cli.Context) error {
force := c.Bool("force")
return run(force)
},
}
err := app.Run(os.Args)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
}
func run(confirmed bool) error {
docker, err := client.NewClientWithOpts()
if err != nil {
return err
}
items, err := gatherItems(docker)
if err != nil {
return err
}
containerCount := len(items.Containers)
imageCount := len(items.Images)
networkCount := len(items.Networks)
volumeCount := len(items.Volumes)
if containerCount+imageCount+networkCount+volumeCount == 0 {
fmt.Println("Nothing to remove")
} else {
fmt.Println("TYPE ID DESCRIPTION")
for _, item := range items.Containers {
fmt.Printf("%s %s %s\n", "container", item.ID[:12], item.Description)
}
for _, item := range items.Images {
fmt.Printf("%s %s %s\n", "image ", item.ID[:12], item.Description)
}
for _, item := range items.Networks {
fmt.Printf("%s %s %s\n", "network ", item.ID[:12], item.Description)
}
for _, item := range items.Volumes {
fmt.Printf("%s %s %s\n", "volume ", item.ID[:12], item.Description)
}
if !confirmed {
fmt.Printf("Are you sure you want to remove %d containers, %d images, %d networks and %d volumes? [y/n]\n",
containerCount,
imageCount,
networkCount,
volumeCount,
)
var response string
_, err = fmt.Scanln(&response)
if err != nil {
return err
}
confirmed = response == "y"
}
if confirmed {
for _, item := range items.Containers {
removeContainer(docker, item)
}
for _, item := range items.Images {
removeImage(docker, item)
}
for _, item := range items.Networks {
removeNetwork(docker, item)
}
for _, item := range items.Volumes {
removeVolume(docker, item)
}
} else {
fmt.Println("Nothing has been removed")
}
}
return nil
}
func gatherItems(docker *client.Client) (items, error) {
items := items{}
containers, err := docker.ContainerList(context.Background(), types.ContainerListOptions{
All: true,
Filters: singleArg("status", "exited")})
if err != nil {
return items, nil
}
for _, container := range containers {
items.Containers = append(items.Containers, item{
ID: container.ID,
Description: strings.Join(container.Names, ", "),
})
}
images, err := docker.ImageList(context.Background(), types.ImageListOptions{Filters: singleArg("dangling", "true")})
if err != nil {
return items, nil
}
for _, image := range images {
items.Images = append(items.Images, item{
ID: image.ID[7:],
Description: strings.Join(image.RepoTags, ", "),
})
}
networks, err := docker.NetworkList(context.Background(), types.NetworkListOptions{Filters: singleArg("driver", "bridge")})
if err != nil {
return items, nil
}
for _, network := range networks {
if network.Name != "bridge" && len(network.Containers) == 0 {
items.Networks = append(items.Networks, item{
ID: network.ID,
Description: network.Name + "/" + network.Driver,
})
}
}
volumeList, err := docker.VolumeList(context.Background(), volume.ListOptions{Filters: singleArg("dangling", "true")})
if err != nil {
return items, nil
}
for _, volume := range volumeList.Volumes {
items.Volumes = append(items.Volumes, item{
ID: volume.Name,
Description: volume.Mountpoint,
})
}
return items, nil
}
func singleArg(name string, value string) filters.Args {
args := filters.NewArgs()
args.Add(name, value)
return args
}
func removeContainer(docker *client.Client, item item) {
err := docker.ContainerRemove(context.Background(), item.ID, types.ContainerRemoveOptions{})
if err != nil {
panic(err)
}
fmt.Printf("%s %s removed\n", "Container", item.ID[:12])
}
func removeImage(docker *client.Client, item item) {
_, err := docker.ImageRemove(context.Background(), item.ID, types.ImageRemoveOptions{})
if err != nil {
panic(err)
}
fmt.Printf("%s %s removed\n", "Image", item.ID[:12])
}
func removeNetwork(docker *client.Client, item item) {
err := docker.NetworkRemove(context.Background(), item.ID)
if err != nil {
panic(err)
}
fmt.Printf("%s %s removed\n", "Network", item.ID[:12])
}
func removeVolume(docker *client.Client, item item) {
err := docker.VolumeRemove(context.Background(), item.ID, false)
if err != nil {
panic(err)
}
fmt.Printf("%s %s removed\n", "Volume", item.ID[:12])
}