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package main
import (
"fmt"
"os"
"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/pkg/rootless"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
restartCommand cliconfig.RestartValues
restartDescription = `Restarts one or more running containers. The container ID or name can be used. A timeout before forcibly stopping can be set, but defaults to 10 seconds`
_restartCommand = &cobra.Command{
Use: "restart",
Short: "Restart one or more containers",
Long: restartDescription,
RunE: func(cmd *cobra.Command, args []string) error {
restartCommand.InputArgs = args
restartCommand.GlobalFlags = MainGlobalOpts
return restartCmd(&restartCommand)
},
Example: "CONTAINER [CONTAINER ...]",
}
)
func init() {
restartCommand.Command = _restartCommand
flags := restartCommand.Flags()
flags.BoolVarP(&restartCommand.All, "all", "a", false, "Restart all non-running containers")
flags.BoolVarP(&restartCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
flags.BoolVar(&restartCommand.Running, "running", false, "Restart only running containers when --all is used")
flags.UintVarP(&restartCommand.Timeout, "timeout", "t", libpod.CtrRemoveTimeout, "Seconds to wait for stop before killing the container")
flags.UintVar(&restartCommand.Timeout, "time", libpod.CtrRemoveTimeout, "Seconds to wait for stop before killing the container")
rootCmd.AddCommand(restartCommand.Command)
}
func restartCmd(c *cliconfig.RestartValues) error {
var (
restartFuncs []shared.ParallelWorkerInput
containers []*libpod.Container
restartContainers []*libpod.Container
)
if os.Geteuid() != 0 {
rootless.SetSkipStorageSetup(true)
}
args := c.InputArgs
runOnly := c.Running
all := c.All
if len(args) < 1 && !c.Latest && !all {
return errors.Wrapf(libpod.ErrInvalidArg, "you must provide at least one container name or ID")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
timeout := c.Timeout
useTimeout := c.Flag("timeout").Changed
// Handle --latest
if c.Latest {
lastCtr, err := runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to get latest container")
}
restartContainers = append(restartContainers, lastCtr)
} else if runOnly {
containers, err = getAllOrLatestContainers(&c.PodmanCommand, runtime, libpod.ContainerStateRunning, "running")
if err != nil {
return err
}
restartContainers = append(restartContainers, containers...)
} else if all {
containers, err = runtime.GetAllContainers()
if err != nil {
return err
}
restartContainers = append(restartContainers, containers...)
} else {
for _, id := range args {
ctr, err := runtime.LookupContainer(id)
if err != nil {
return err
}
restartContainers = append(restartContainers, ctr)
}
}
maxWorkers := shared.Parallelize("restart")
if c.GlobalIsSet("max-workers") {
maxWorkers = c.GlobalFlags.MaxWorks
}
logrus.Debugf("Setting maximum workers to %d", maxWorkers)
if rootless.IsRootless() {
// With rootless containers we cannot really restart an existing container
// as we would need to join the mount namespace as well to be able to reuse
// the storage.
if err := stopRootlessContainers(restartContainers, timeout, useTimeout, maxWorkers); err != nil {
return err
}
became, ret, err := rootless.BecomeRootInUserNS()
if err != nil {
return err
}
if became {
os.Exit(ret)
}
}
// We now have a slice of all the containers to be restarted. Iterate them to
// create restart Funcs with a timeout as needed
for _, ctr := range restartContainers {
con := ctr
ctrTimeout := ctr.StopTimeout()
if useTimeout {
ctrTimeout = timeout
}
f := func() error {
return con.RestartWithTimeout(getContext(), ctrTimeout)
}
restartFuncs = append(restartFuncs, shared.ParallelWorkerInput{
ContainerID: con.ID(),
ParallelFunc: f,
})
}
restartErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, restartFuncs)
return printParallelOutput(restartErrors, errCount)
}
func stopRootlessContainers(stopContainers []*libpod.Container, timeout uint, useTimeout bool, maxWorkers int) error {
var stopFuncs []shared.ParallelWorkerInput
for _, ctr := range stopContainers {
state, err := ctr.State()
if err != nil {
return err
}
if state != libpod.ContainerStateRunning {
continue
}
ctrTimeout := ctr.StopTimeout()
if useTimeout {
ctrTimeout = timeout
}
c := ctr
f := func() error {
return c.StopWithTimeout(ctrTimeout)
}
stopFuncs = append(stopFuncs, shared.ParallelWorkerInput{
ContainerID: c.ID(),
ParallelFunc: f,
})
restartErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, stopFuncs)
var lastError error
for _, result := range restartErrors {
if result != nil {
if errCount > 1 {
fmt.Println(result.Error())
}
lastError = result
}
}
if lastError != nil {
return lastError
}
}
return nil
}
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