103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
// +build linux
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package libpod
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import (
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"strconv"
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"syscall"
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"github.com/containers/podman/v2/libpod/define"
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"github.com/containers/podman/v2/pkg/rootless"
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"github.com/containers/podman/v2/pkg/util"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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func stopPauseProcess() error {
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if rootless.IsRootless() {
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pausePidPath, err := util.GetRootlessPauseProcessPidPath()
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if err != nil {
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return errors.Wrapf(err, "could not get pause process pid file path")
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}
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data, err := ioutil.ReadFile(pausePidPath)
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return errors.Wrapf(err, "cannot read pause process pid file %s", pausePidPath)
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}
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pausePid, err := strconv.Atoi(string(data))
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if err != nil {
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return errors.Wrapf(err, "cannot parse pause pid file %s", pausePidPath)
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}
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if err := os.Remove(pausePidPath); err != nil {
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return errors.Wrapf(err, "cannot delete pause pid file %s", pausePidPath)
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}
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if err := syscall.Kill(pausePid, syscall.SIGKILL); err != nil {
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return err
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}
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}
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return nil
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}
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func (r *Runtime) migrate(ctx context.Context) error {
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runningContainers, err := r.GetRunningContainers()
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if err != nil {
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return err
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}
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allCtrs, err := r.state.AllContainers()
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if err != nil {
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return err
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}
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logrus.Infof("stopping all containers")
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for _, ctr := range runningContainers {
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fmt.Printf("stopped %s\n", ctr.ID())
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if err := ctr.Stop(); err != nil {
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return errors.Wrapf(err, "cannot stop container %s", ctr.ID())
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}
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}
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// Did the user request a new runtime?
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runtimeChangeRequested := r.migrateRuntime != ""
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requestedRuntime, runtimeExists := r.ociRuntimes[r.migrateRuntime]
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if !runtimeExists && runtimeChangeRequested {
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return errors.Wrapf(define.ErrInvalidArg, "change to runtime %q requested but no such runtime is defined", r.migrateRuntime)
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}
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for _, ctr := range allCtrs {
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needsWrite := false
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// Reset pause process location
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oldLocation := filepath.Join(ctr.state.RunDir, "conmon.pid")
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if ctr.config.ConmonPidFile == oldLocation {
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logrus.Infof("changing conmon PID file for %s", ctr.ID())
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ctr.config.ConmonPidFile = filepath.Join(ctr.config.StaticDir, "conmon.pid")
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needsWrite = true
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}
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// Reset runtime
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if runtimeChangeRequested {
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logrus.Infof("Resetting container %s runtime to runtime %s", ctr.ID(), r.migrateRuntime)
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ctr.config.OCIRuntime = r.migrateRuntime
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ctr.ociRuntime = requestedRuntime
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needsWrite = true
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}
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if needsWrite {
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if err := r.state.RewriteContainerConfig(ctr, ctr.config); err != nil {
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return errors.Wrapf(err, "error rewriting config for container %s", ctr.ID())
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}
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}
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}
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return stopPauseProcess()
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}
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