package volumes import ( "bufio" "context" "fmt" "os" "strings" "github.com/containers/common/pkg/completion" "github.com/containers/podman/v3/cmd/podman/common" "github.com/containers/podman/v3/cmd/podman/parse" "github.com/containers/podman/v3/cmd/podman/registry" "github.com/containers/podman/v3/cmd/podman/utils" "github.com/containers/podman/v3/cmd/podman/validate" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/spf13/cobra" ) var ( volumePruneDescription = `Volumes that are not currently owned by a container will be removed. The command prompts for confirmation which can be overridden with the --force flag. Note all data will be destroyed.` pruneCommand = &cobra.Command{ Use: "prune [options]", Args: validate.NoArgs, Short: "Remove all unused volumes", Long: volumePruneDescription, RunE: prune, ValidArgsFunction: completion.AutocompleteNone, } filter = []string{} ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Command: pruneCommand, Parent: volumeCmd, }) flags := pruneCommand.Flags() filterFlagName := "filter" flags.StringArrayVar(&filter, filterFlagName, []string{}, "Provide filter values (e.g. 'label==')") _ = pruneCommand.RegisterFlagCompletionFunc(filterFlagName, common.AutocompleteVolumeFilters) flags.BoolP("force", "f", false, "Do not prompt for confirmation") } func prune(cmd *cobra.Command, args []string) error { var ( pruneOptions = entities.VolumePruneOptions{} listOptions = entities.VolumeListOptions{} unusedOptions = entities.VolumeListOptions{} ) // Prompt for confirmation if --force is not set force, err := cmd.Flags().GetBool("force") if err != nil { return err } pruneOptions.Filters, err = parse.FilterArgumentsIntoFilters(filter) if err != nil { return err } if !force { reader := bufio.NewReader(os.Stdin) fmt.Println("WARNING! This will remove all volumes not used by at least one container. The following volumes will be removed:") if err != nil { return err } listOptions.Filter, err = parse.FilterArgumentsIntoFilters(filter) if err != nil { return err } // filter all the dangling volumes unusedOptions.Filter = make(map[string][]string, 1) unusedOptions.Filter["dangling"] = []string{"true"} unusedVolumes, err := registry.ContainerEngine().VolumeList(context.Background(), unusedOptions) if err != nil { return err } // filter volumes based on user input filteredVolumes, err := registry.ContainerEngine().VolumeList(context.Background(), listOptions) if err != nil { return err } finalVolumes := getIntersection(unusedVolumes, filteredVolumes) if len(finalVolumes) < 1 { fmt.Println("No dangling volumes found") return nil } for _, fv := range finalVolumes { fmt.Println(fv.Name) } fmt.Print("Are you sure you want to continue? [y/N] ") answer, err := reader.ReadString('\n') if err != nil { return err } if strings.ToLower(answer)[0] != 'y' { return nil } } responses, err := registry.ContainerEngine().VolumePrune(context.Background(), pruneOptions) if err != nil { return err } return utils.PrintVolumePruneResults(responses, false) } func getIntersection(a, b []*entities.VolumeListReport) []*entities.VolumeListReport { var intersection []*entities.VolumeListReport hash := make(map[string]bool, len(a)) for _, aa := range a { hash[aa.Name] = true } for _, bb := range b { if hash[bb.Name] { intersection = append(intersection, bb) } } return intersection }