Merge pull request #11624 from giuseppe/3.4-fix-pause-process

[3.4] runtime: move pause process to scope

1 files changed, 2 insertions, 42 deletions

diff --git a/pkg/domain/infra/abi/system.go b/pkg/domain/infra/abi/system.go
index bc98edd06..e326f26a8 100644
--- a/pkg/domain/infra/abi/system.go
+++ b/pkg/domain/infra/abi/system.go
@@ -3,16 +3,12 @@ package abi
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
 	"path/filepath"
-	"strconv"
-	"strings"
 
 	"github.com/containers/common/pkg/config"
-	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/libpod/define"
 	"github.com/containers/podman/v3/pkg/cgroups"
 	"github.com/containers/podman/v3/pkg/domain/entities"
@@ -72,11 +68,7 @@ func (ic *ContainerEngine) SetupRootless(_ context.Context, noMoveProcess bool)
 			if err != nil {
 				return err
 			}
-
-			initCommand, err := ioutil.ReadFile("/proc/1/comm")
-			// On errors, default to systemd
-			runsUnderSystemd := err != nil || strings.TrimRight(string(initCommand), "\n") == "systemd"
-
+			runsUnderSystemd := utils.RunsOnSystemd()
 			unitName := fmt.Sprintf("podman-%d.scope", os.Getpid())
 			if runsUnderSystemd || conf.Engine.CgroupManager == config.SystemdCgroupsManager {
 				if err := utils.RunUnderSystemdScope(os.Getpid(), "user.slice", unitName); err != nil {
@@ -120,18 +112,7 @@ func (ic *ContainerEngine) SetupRootless(_ context.Context, noMoveProcess bool)
 	}
 
 	became, ret, err = rootless.TryJoinFromFilePaths(pausePidPath, true, paths)
-
-	if err := movePauseProcessToScope(ic.Libpod); err != nil {
-		conf, err2 := ic.Config(context.Background())
-		if err2 != nil {
-			return err
-		}
-		if conf.Engine.CgroupManager == config.SystemdCgroupsManager {
-			logrus.Warnf("Failed to add pause process to systemd sandbox cgroup: %v", err)
-		} else {
-			logrus.Debugf("Failed to add pause process to systemd sandbox cgroup: %v", err)
-		}
-	}
+	utils.MovePauseProcessToScope(pausePidPath)
 	if err != nil {
 		logrus.Error(errors.Wrapf(err, "invalid internal status, try resetting the pause process with %q", os.Args[0]+" system migrate"))
 		os.Exit(1)
@@ -142,27 +123,6 @@ func (ic *ContainerEngine) SetupRootless(_ context.Context, noMoveProcess bool)
 	return nil
 }
 
-func movePauseProcessToScope(r *libpod.Runtime) error {
-	tmpDir, err := r.TmpDir()
-	if err != nil {
-		return err
-	}
-	pausePidPath, err := util.GetRootlessPauseProcessPidPathGivenDir(tmpDir)
-	if err != nil {
-		return errors.Wrapf(err, "could not get pause process pid file path")
-	}
-	data, err := ioutil.ReadFile(pausePidPath)
-	if err != nil {
-		return errors.Wrapf(err, "cannot read pause pid file")
-	}
-	pid, err := strconv.ParseUint(string(data), 10, 0)
-	if err != nil {
-		return errors.Wrapf(err, "cannot parse pid file %s", pausePidPath)
-	}
-
-	return utils.RunUnderSystemdScope(int(pid), "user.slice", "podman-pause.scope")
-}
-
 // SystemPrune removes unused data from the system. Pruning pods, containers, volumes and images.
 func (ic *ContainerEngine) SystemPrune(ctx context.Context, options entities.SystemPruneOptions) (*entities.SystemPruneReport, error) {
 	var systemPruneReport = new(entities.SystemPruneReport)