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package main
import (
"os"
"syscall"
"fmt"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/pkg/rootless"
"github.com/docker/docker/pkg/signal"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
killFlags = []cli.Flag{
cli.BoolFlag{
Name: "all, a",
Usage: "Signal all running containers",
},
cli.StringFlag{
Name: "signal, s",
Usage: "Signal to send to the container",
Value: "KILL",
},
LatestFlag,
}
killDescription = "The main process inside each container specified will be sent SIGKILL, or any signal specified with option --signal."
killCommand = cli.Command{
Name: "kill",
Usage: "Kill one or more running containers with a specific signal",
Description: killDescription,
Flags: killFlags,
Action: killCmd,
ArgsUsage: "CONTAINER-NAME [CONTAINER-NAME ...]",
UseShortOptionHandling: true,
OnUsageError: usageErrorHandler,
}
)
// killCmd kills one or more containers with a signal
func killCmd(c *cli.Context) error {
args := c.Args()
if (!c.Bool("all") && !c.Bool("latest")) && len(args) == 0 {
return errors.Errorf("you must specify one or more containers to kill")
}
if (c.Bool("all") || c.Bool("latest")) && len(args) > 0 {
return errors.Errorf("you cannot specify any containers to kill with --latest or --all")
}
if c.Bool("all") && c.Bool("latest") {
return errors.Errorf("--all and --latest cannot be used together")
}
if len(args) < 1 && !c.Bool("all") && !c.Bool("latest") {
return errors.Errorf("you must provide at least one container name or id")
}
if err := validateFlags(c, killFlags); err != nil {
return err
}
rootless.SetSkipStorageSetup(true)
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
var killSignal uint = uint(syscall.SIGTERM)
if c.String("signal") != "" {
// Check if the signalString provided by the user is valid
// Invalid signals will return err
sysSignal, err := signal.ParseSignal(c.String("signal"))
if err != nil {
return err
}
killSignal = uint(sysSignal)
}
var filterFuncs []libpod.ContainerFilter
var containers []*libpod.Container
var lastError error
if c.Bool("all") {
// only get running containers
filterFuncs = append(filterFuncs, func(c *libpod.Container) bool {
state, _ := c.State()
return state == libpod.ContainerStateRunning
})
containers, err = runtime.GetContainers(filterFuncs...)
if err != nil {
return errors.Wrapf(err, "unable to get running containers")
}
} else if c.Bool("latest") {
lastCtr, err := runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to get last created container")
}
containers = append(containers, lastCtr)
} else {
for _, i := range args {
container, err := runtime.LookupContainer(i)
if err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "unable to find container %s", i)
continue
}
containers = append(containers, container)
}
}
for _, ctr := range containers {
if err := ctr.Kill(killSignal); err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "unable to find container %v", ctr.ID())
} else {
fmt.Println(ctr.ID())
}
}
return lastError
}
|
