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Add k8s function to compress cgroupfs path to systemd

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We are copying this to avoid getting in lots of dependencies.
We also remove now unused function.

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>
This commit is contained in:
Mrunal Patel 2017-09-05 17:59:40 -07:00
parent 8538c4067a
commit 612dcc0267
1 changed files with 11 additions and 37 deletions
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48
server/sandbox_run.go
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@ -5,6 +5,7 @@ import (
"fmt"
"net"
"os"
"path"
"path/filepath"
"regexp"
"strconv"
@ -15,7 +16,6 @@ import (
"github.com/kubernetes-incubator/cri-o/libkpod/sandbox"
"github.com/kubernetes-incubator/cri-o/oci"
"github.com/kubernetes-incubator/cri-o/pkg/annotations"
"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
"github.com/opencontainers/runtime-tools/generate"
"github.com/opencontainers/selinux/go-selinux/label"
"github.com/pkg/errors"
@ -572,40 +572,14 @@ func setupShm(podSandboxRunDir, mountLabel string) (shmPath string, err error) {
return shmPath, nil
}
// convertCgroupNameToSystemd converts the internal cgroup name to a systemd name.
// For example, the name /Burstable/pod_123-456 becomes Burstable-pod_123_456.slice
// If outputToCgroupFs is true, it expands the systemd name into the cgroupfs form.
// For example, it will return /Burstable.slice/Burstable-pod_123_456.slice in above scenario.
func convertCgroupNameToSystemd(name string, outputToCgroupFs bool) (systemdCgroup string, err error) {
result := ""
if name != "" && name != "/" {
// systemd treats - as a step in the hierarchy, we convert all - to _
name = strings.Replace(name, "-", "_", -1)
parts := strings.Split(name, "/")
for _, part := range parts {
// ignore leading stuff for now
if part == "" {
continue
}
if len(result) > 0 {
result = result + "-"
}
result = result + part
}
} else {
// root converts to -
result = "-"
}
// always have a .slice suffix
result = result + ".slice"
// if the caller desired the result in cgroupfs format...
if outputToCgroupFs {
var err error
result, err = systemd.ExpandSlice(result)
if err != nil {
return "", fmt.Errorf("error adapting cgroup name, input: %v, err: %v", name, err)
}
}
return result, nil
// convertCgroupFsNameToSystemd converts an expanded cgroupfs name to its systemd name.
// For example, it will convert test.slice/test-a.slice/test-a-b.slice to become test-a-b.slice
// NOTE: this is public right now to allow its usage in dockermanager and dockershim, ideally both those
// code areas could use something from libcontainer if we get this style function upstream.
func convertCgroupFsNameToSystemd(cgroupfsName string) (string, error) {
// TODO: see if libcontainer systemd implementation could use something similar, and if so, move
// this function up to that library. At that time, it would most likely do validation specific to systemd
// above and beyond the simple assumption here that the base of the path encodes the hierarchy
// per systemd convention.
return path.Base(cgroupfsName), nil
}