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Diffstat (limited to 'libpod/runtime.go')
-rw-r--r--libpod/runtime.go49
1 files changed, 49 insertions, 0 deletions
diff --git a/libpod/runtime.go b/libpod/runtime.go
index e2b9667be..675c92b7a 100644
--- a/libpod/runtime.go
+++ b/libpod/runtime.go
@@ -23,6 +23,7 @@ import (
"github.com/containers/libpod/libpod/events"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/libpod/lock"
+ "github.com/containers/libpod/pkg/cgroups"
sysreg "github.com/containers/libpod/pkg/registries"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/util"
@@ -254,6 +255,8 @@ type RuntimeConfig struct {
// SDNotify tells Libpod to allow containers to notify the host
// systemd of readiness using the SD_NOTIFY mechanism
SDNotify bool
+ // CgroupCheck verifies if the cgroup check for correct OCI runtime has been done.
+ CgroupCheck bool `toml:"cgroup_check,omitempty"`
}
// runtimeConfiguredFrom is a struct used during early runtime init to help
@@ -575,6 +578,10 @@ func newRuntimeFromConfig(ctx context.Context, userConfigPath string, options ..
configPath)
}
+ if err := cgroupV2Check(configPath, tmpConfig); err != nil {
+ return nil, err
+ }
+
if tmpConfig.StaticDir != "" {
runtime.configuredFrom.libpodStaticDirSet = true
}
@@ -664,6 +671,14 @@ func newRuntimeFromConfig(ctx context.Context, userConfigPath string, options ..
runtime.config.OCIRuntime = tmpConfig.OCIRuntime
}
+ cgroupsV2, err := cgroups.IsCgroup2UnifiedMode()
+ if err != nil {
+ return nil, err
+ }
+ if cgroupsV2 {
+ runtime.config.CgroupCheck = true
+ }
+
break
}
}
@@ -1451,3 +1466,37 @@ func (r *Runtime) ImageRuntime() *image.Runtime {
func (r *Runtime) SystemContext() *types.SystemContext {
return r.imageContext
}
+
+// Since runc does not currently support cgroupV2
+// Change to default crun on first running of libpod.conf
+// TODO Once runc has support for cgroups, this function should be removed.
+func cgroupV2Check(configPath string, tmpConfig *RuntimeConfig) error {
+ if !tmpConfig.CgroupCheck && rootless.IsRootless() {
+ cgroupsV2, err := cgroups.IsCgroup2UnifiedMode()
+ if err != nil {
+ return err
+ }
+ if cgroupsV2 {
+ path, err := exec.LookPath("crun")
+ if err != nil {
+ logrus.Warnf("Can not find crun package on the host, containers might fail to run on cgroup V2 systems without crun: %q", err)
+ // Can't find crun path so do nothing
+ return nil
+ }
+ tmpConfig.CgroupCheck = true
+ tmpConfig.OCIRuntime = path
+ file, err := os.OpenFile(configPath, os.O_RDWR|os.O_CREATE, 0666)
+ if err != nil {
+ return errors.Wrapf(err, "cannot open file %s", configPath)
+ }
+ defer file.Close()
+ enc := toml.NewEncoder(file)
+ if err := enc.Encode(tmpConfig); err != nil {
+ if removeErr := os.Remove(configPath); removeErr != nil {
+ logrus.Debugf("unable to remove %s: %q", configPath, err)
+ }
+ }
+ }
+ }
+ return nil
+}