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|
package volumes
import (
"bufio"
"context"
"fmt"
"os"
"strings"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v2/cmd/podman/common"
"github.com/containers/podman/v2/cmd/podman/registry"
"github.com/containers/podman/v2/cmd/podman/utils"
"github.com/containers/podman/v2/cmd/podman/validate"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/containers/podman/v2/pkg/domain/filters"
"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{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: pruneCommand,
Parent: volumeCmd,
})
flags := pruneCommand.Flags()
filterFlagName := "filter"
flags.StringArrayVar(&filter, filterFlagName, []string{}, "Provide filter values (e.g. 'label=<key>=<value>')")
_ = 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 = filters.ParseFilterArgumentsIntoFilters(filter)
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 = filters.ParseFilterArgumentsIntoFilters(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
}
|
