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package main
import (
"fmt"
"os"
"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/urfave/cli"
)
var (
restartFlags = []cli.Flag{
cli.BoolFlag{
Name: "all, a",
Usage: "Restart all non-running containers",
},
cli.BoolFlag{
Name: "running",
Usage: "Restart only running containers when --all is used",
},
cli.UintFlag{
Name: "timeout, time, t",
Usage: "Seconds to wait for stop before killing the container",
Value: libpod.CtrRemoveTimeout,
},
LatestFlag,
}
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 = cli.Command{
Name: "restart",
Usage: "Restart one or more containers",
Description: restartDescription,
Flags: sortFlags(restartFlags),
Action: restartCmd,
ArgsUsage: "CONTAINER [CONTAINER ...]",
UseShortOptionHandling: true,
OnUsageError: usageErrorHandler,
}
)
func restartCmd(c *cli.Context) error {
var (
restartFuncs []shared.ParallelWorkerInput
containers []*libpod.Container
restartContainers []*libpod.Container
)
if os.Geteuid() != 0 {
rootless.SetSkipStorageSetup(true)
}
args := c.Args()
runOnly := c.Bool("running")
all := c.Bool("all")
if len(args) < 1 && !c.Bool("latest") && !all {
return errors.Wrapf(libpod.ErrInvalidArg, "you must provide at least one container name or ID")
}
if err := validateFlags(c, restartFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
timeout := c.Uint("timeout")
useTimeout := c.IsSet("timeout")
// Handle --latest
if c.Bool("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, 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.GlobalInt("max-workers")
}
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
}
|
