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|
//go:build !remote
package libpod
import (
"fmt"
"os"
"path/filepath"
"strconv"
"syscall"
"github.com/containers/podman/v5/libpod/define"
"github.com/containers/podman/v5/pkg/rootless"
"github.com/containers/podman/v5/pkg/util"
"github.com/sirupsen/logrus"
)
func (r *Runtime) stopPauseProcess() error {
if rootless.IsRootless() {
pausePidPath, err := util.GetRootlessPauseProcessPidPath()
if err != nil {
return fmt.Errorf("could not get pause process pid file path: %w", err)
}
data, err := os.ReadFile(pausePidPath)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return fmt.Errorf("cannot read pause process pid file: %w", err)
}
pausePid, err := strconv.Atoi(string(data))
if err != nil {
return fmt.Errorf("cannot parse pause pid file %s: %w", pausePidPath, err)
}
if err := os.Remove(pausePidPath); err != nil {
return fmt.Errorf("cannot delete pause pid file %s: %w", pausePidPath, err)
}
if err := syscall.Kill(pausePid, syscall.SIGKILL); err != nil {
return err
}
}
return nil
}
// Migrate stops the rootless pause process and performs any necessary database
// migrations that are required. It can also migrate all containers to a new OCI
// runtime, if requested.
func (r *Runtime) Migrate(newRuntime string) error {
// Acquire the alive lock and hold it.
// Ensures that we don't let other Podman commands run while we are
// rewriting things in the DB.
aliveLock, err := r.getRuntimeAliveLock()
if err != nil {
return fmt.Errorf("retrieving alive lock: %w", err)
}
aliveLock.Lock()
defer aliveLock.Unlock()
if !r.valid {
return define.ErrRuntimeStopped
}
runningContainers, err := r.GetRunningContainers()
if err != nil {
return err
}
allCtrs, err := r.state.AllContainers(false)
if err != nil {
return err
}
logrus.Infof("Stopping all containers")
for _, ctr := range runningContainers {
fmt.Printf("stopped %s\n", ctr.ID())
if err := ctr.Stop(); err != nil {
return fmt.Errorf("cannot stop container %s: %w", ctr.ID(), err)
}
}
// Did the user request a new runtime?
runtimeChangeRequested := newRuntime != ""
var requestedRuntime OCIRuntime
if runtimeChangeRequested {
runtime, exists := r.ociRuntimes[newRuntime]
if !exists {
return fmt.Errorf("change to runtime %q requested but no such runtime is defined: %w", newRuntime, define.ErrInvalidArg)
}
requestedRuntime = runtime
}
for _, ctr := range allCtrs {
needsWrite := false
// Reset pause process location
oldLocation := filepath.Join(ctr.state.RunDir, "conmon.pid")
if ctr.config.ConmonPidFile == oldLocation {
logrus.Infof("Changing conmon PID file for %s", ctr.ID())
ctr.config.ConmonPidFile = filepath.Join(ctr.config.StaticDir, "conmon.pid")
needsWrite = true
}
// Reset runtime
if runtimeChangeRequested && ctr.config.OCIRuntime != newRuntime {
logrus.Infof("Resetting container %s runtime to runtime %s", ctr.ID(), newRuntime)
ctr.config.OCIRuntime = newRuntime
ctr.ociRuntime = requestedRuntime
needsWrite = true
}
if needsWrite {
if err := r.state.RewriteContainerConfig(ctr, ctr.config); err != nil {
return fmt.Errorf("rewriting config for container %s: %w", ctr.ID(), err)
}
}
}
return r.stopPauseProcess()
}
|
