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package main
import (
"context"
"fmt"
"os"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/pkg/rootless"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
checkpointCommand cliconfig.CheckpointValues
checkpointDescription = `
podman container checkpoint
Checkpoints one or more running containers. The container name or ID can be used.
`
_checkpointCommand = &cobra.Command{
Use: "checkpoint",
Short: "Checkpoints one or more containers",
Long: checkpointDescription,
RunE: func(cmd *cobra.Command, args []string) error {
checkpointCommand.InputArgs = args
checkpointCommand.GlobalFlags = MainGlobalOpts
return checkpointCmd(&checkpointCommand)
},
Example: `podman checkpoint --keep ctrID
podman checkpoint --all
podman checkpoint --leave-running --latest`,
}
)
func init() {
checkpointCommand.Command = _checkpointCommand
checkpointCommand.SetUsageTemplate(UsageTemplate())
flags := checkpointCommand.Flags()
flags.BoolVarP(&checkpointCommand.Keep, "keep", "k", false, "Keep all temporary checkpoint files")
flags.BoolVarP(&checkpointCommand.LeaveRunning, "leave-running", "R", false, "Leave the container running after writing checkpoint to disk")
flags.BoolVar(&checkpointCommand.TcpEstablished, "tcp-established", false, "Checkpoint a container with established TCP connections")
flags.BoolVarP(&checkpointCommand.All, "all", "a", false, "Checkpoint all running containers")
flags.BoolVarP(&checkpointCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
}
func checkpointCmd(c *cliconfig.CheckpointValues) error {
if rootless.IsRootless() {
return errors.New("checkpointing a container requires root")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
options := libpod.ContainerCheckpointOptions{
Keep: c.Keep,
KeepRunning: c.LeaveRunning,
TCPEstablished: c.TcpEstablished,
}
if err := checkAllAndLatest(&c.PodmanCommand); err != nil {
return err
}
containers, lastError := getAllOrLatestContainers(&c.PodmanCommand, runtime, libpod.ContainerStateRunning, "running")
for _, ctr := range containers {
if err = ctr.Checkpoint(context.TODO(), options); err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "failed to checkpoint container %v", ctr.ID())
} else {
fmt.Println(ctr.ID())
}
}
return lastError
}
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