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package main
import (
"fmt"
"io/ioutil"
"os"
"strconv"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/cmd/podman/shared"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/rootless"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
rmCommand cliconfig.RmValues
rmDescription = fmt.Sprintf(`Removes one or more containers from the host. The container name or ID can be used.
Command does not remove images. Running containers will not be removed without the -f option.`)
_rmCommand = &cobra.Command{
Use: "rm [flags] CONTAINER [CONTAINER...]",
Short: "Remove one or more containers",
Long: rmDescription,
RunE: func(cmd *cobra.Command, args []string) error {
rmCommand.InputArgs = args
rmCommand.GlobalFlags = MainGlobalOpts
return rmCmd(&rmCommand)
},
Args: func(cmd *cobra.Command, args []string) error {
return checkAllAndLatest(cmd, args, false)
},
Example: `podman rm imageID
podman rm mywebserver myflaskserver 860a4b23
podman rm --force --all`,
}
)
func init() {
rmCommand.Command = _rmCommand
rmCommand.SetHelpTemplate(HelpTemplate())
rmCommand.SetUsageTemplate(UsageTemplate())
flags := rmCommand.Flags()
flags.BoolVarP(&rmCommand.All, "all", "a", false, "Remove all containers")
flags.BoolVarP(&rmCommand.Force, "force", "f", false, "Force removal of a running container. The default is false")
flags.BoolVarP(&rmCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
flags.BoolVarP(&rmCommand.Volumes, "volumes", "v", false, "Remove the volumes associated with the container")
markFlagHiddenForRemoteClient("latest", flags)
}
func joinContainerOrCreateRootlessUserNS(runtime *libpod.Runtime, ctr *libpod.Container) (bool, int, error) {
if os.Geteuid() == 0 {
return false, 0, nil
}
s, err := ctr.State()
if err != nil {
return false, -1, err
}
opts := rootless.Opts{
Argument: ctr.ID(),
}
if s == libpod.ContainerStateRunning || s == libpod.ContainerStatePaused {
data, err := ioutil.ReadFile(ctr.Config().ConmonPidFile)
if err != nil {
return false, -1, errors.Wrapf(err, "cannot read conmon PID file %q", ctr.Config().ConmonPidFile)
}
conmonPid, err := strconv.Atoi(string(data))
if err != nil {
return false, -1, errors.Wrapf(err, "cannot parse PID %q", data)
}
return rootless.JoinDirectUserAndMountNSWithOpts(uint(conmonPid), &opts)
}
return rootless.BecomeRootInUserNSWithOpts(&opts)
}
// saveCmd saves the image to either docker-archive or oci
func rmCmd(c *cliconfig.RmValues) error {
var (
deleteFuncs []shared.ParallelWorkerInput
)
ctx := getContext()
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
if rootless.IsRootless() {
// When running in rootless mode we cannot manage different containers and
// user namespaces from the same context, so be sure to re-exec once for each
// container we are dealing with.
// What we do is to first collect all the containers we want to delete, then
// we re-exec in each of the container namespaces and from there remove the single
// container.
var container *libpod.Container
if os.Geteuid() == 0 {
// We are in the namespace, override InputArgs with the single
// argument that was passed down to us.
c.All = false
c.Latest = false
c.InputArgs = []string{rootless.Argument()}
} else {
exitCode = 0
var containers []*libpod.Container
if c.All {
containers, err = runtime.GetContainers()
} else if c.Latest {
container, err = runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to get latest pod")
}
containers = append(containers, container)
} else {
for _, c := range c.InputArgs {
container, err = runtime.LookupContainer(c)
if err != nil {
if errors.Cause(err) == libpod.ErrNoSuchCtr {
exitCode = 1
continue
}
return err
}
containers = append(containers, container)
}
}
// Now we really delete the containers.
for _, c := range containers {
_, ret, err := joinContainerOrCreateRootlessUserNS(runtime, c)
if err != nil {
return err
}
if ret != 0 {
os.Exit(ret)
}
}
os.Exit(exitCode)
}
}
failureCnt := 0
delContainers, err := getAllOrLatestContainers(&c.PodmanCommand, runtime, -1, "all")
if err != nil {
if c.Force && len(c.InputArgs) > 0 {
if errors.Cause(err) == libpod.ErrNoSuchCtr {
err = nil
} else {
failureCnt++
}
runtime.RemoveContainersFromStorage(c.InputArgs)
}
if len(delContainers) == 0 {
if err != nil && failureCnt == 0 {
exitCode = 1
}
return err
}
if err != nil {
if errors.Cause(err) == libpod.ErrNoSuchCtr {
exitCode = 1
}
fmt.Println(err.Error())
}
}
for _, container := range delContainers {
con := container
f := func() error {
return runtime.RemoveContainer(ctx, con, c.Force, c.Volumes)
}
deleteFuncs = append(deleteFuncs, shared.ParallelWorkerInput{
ContainerID: con.ID(),
ParallelFunc: f,
})
}
maxWorkers := shared.Parallelize("rm")
if c.GlobalIsSet("max-workers") {
maxWorkers = c.GlobalFlags.MaxWorks
}
logrus.Debugf("Setting maximum workers to %d", maxWorkers)
// Run the parallel funcs
deleteErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, deleteFuncs)
err = printParallelOutput(deleteErrors, errCount)
if err != nil {
for _, result := range deleteErrors {
if result != nil && errors.Cause(result) != image.ErrNoSuchCtr {
failureCnt++
}
}
if failureCnt == 0 {
exitCode = 1
}
}
if failureCnt > 0 {
exitCode = 125
}
return err
}
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