129 lines
4.0 KiB
Go
129 lines
4.0 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package libcontainer
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import (
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"fmt"
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"path/filepath"
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"reflect"
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"sort"
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"strings"
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"testing"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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)
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var defaultCgroupSubsystems = []string{
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"systemd", "freezer", "memory", "blkio", "hugetlb", "net_cls,net_prio", "pids", "cpu,cpuacct", "devices", "cpuset", "perf_events",
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}
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func cgroupMountsAt(path string, subsystems []string) []cgroups.Mount {
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res := []cgroups.Mount{}
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for _, subsystem := range subsystems {
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res = append(res, cgroups.Mount{
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Root: "/",
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Subsystems: strings.Split(subsystem, ","),
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Mountpoint: filepath.Join(path, subsystem),
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})
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}
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return res
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}
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func TestGetCgroupSubsystems(t *testing.T) {
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ourSubsystems := []string{"cpu,cpuacct", "devices", "memory", "cpuset", "blkio"}
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testCases := []struct {
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mounts []cgroups.Mount
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expected CgroupSubsystems
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err bool
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}{
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{
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mounts: []cgroups.Mount{},
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err: true,
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},
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{
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// normal case
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mounts: cgroupMountsAt("/sys/fs/cgroup", defaultCgroupSubsystems),
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expected: CgroupSubsystems{
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MountPoints: map[string]string{
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"blkio": "/sys/fs/cgroup/blkio",
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"cpu": "/sys/fs/cgroup/cpu,cpuacct",
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"cpuacct": "/sys/fs/cgroup/cpu,cpuacct",
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"cpuset": "/sys/fs/cgroup/cpuset",
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"devices": "/sys/fs/cgroup/devices",
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"memory": "/sys/fs/cgroup/memory",
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},
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Mounts: cgroupMountsAt("/sys/fs/cgroup", ourSubsystems),
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},
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},
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{
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// multiple croup subsystems, should ignore second one
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mounts: append(cgroupMountsAt("/sys/fs/cgroup", defaultCgroupSubsystems),
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cgroupMountsAt("/var/lib/rkt/pods/run/ccdd4e36-2d4c-49fd-8b94-4fb06133913d/stage1/rootfs/opt/stage2/flannel/rootfs/sys/fs/cgroup", defaultCgroupSubsystems)...),
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expected: CgroupSubsystems{
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MountPoints: map[string]string{
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"blkio": "/sys/fs/cgroup/blkio",
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"cpu": "/sys/fs/cgroup/cpu,cpuacct",
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"cpuacct": "/sys/fs/cgroup/cpu,cpuacct",
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"cpuset": "/sys/fs/cgroup/cpuset",
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"devices": "/sys/fs/cgroup/devices",
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"memory": "/sys/fs/cgroup/memory",
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},
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Mounts: cgroupMountsAt("/sys/fs/cgroup", ourSubsystems),
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},
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},
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{
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// most subsystems not mounted
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mounts: append(cgroupMountsAt("/sys/fs/cgroup", []string{"cpu"})),
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expected: CgroupSubsystems{
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MountPoints: map[string]string{
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"cpu": "/sys/fs/cgroup/cpu",
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},
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Mounts: cgroupMountsAt("/sys/fs/cgroup", []string{"cpu"}),
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},
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},
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}
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for i, testCase := range testCases {
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subSystems, err := getCgroupSubsystemsHelper(testCase.mounts, map[string]struct{}{})
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if testCase.err {
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if err == nil {
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t.Fatalf("[case %d] Expected error but didn't get one", i)
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}
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continue
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}
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if err != nil {
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t.Fatalf("[case %d] Expected no error, but got %v", i, err)
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}
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assertCgroupSubsystemsEqual(t, testCase.expected, subSystems, fmt.Sprintf("[case %d]", i))
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}
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}
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func assertCgroupSubsystemsEqual(t *testing.T, expected, actual CgroupSubsystems, message string) {
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if !reflect.DeepEqual(expected.MountPoints, actual.MountPoints) {
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t.Fatalf("%s Expected %v == %v", message, expected.MountPoints, actual.MountPoints)
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}
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sort.Slice(expected.Mounts, func(i, j int) bool {
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return expected.Mounts[i].Mountpoint < expected.Mounts[j].Mountpoint
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})
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sort.Slice(actual.Mounts, func(i, j int) bool {
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return actual.Mounts[i].Mountpoint < actual.Mounts[j].Mountpoint
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})
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if !reflect.DeepEqual(expected.Mounts, actual.Mounts) {
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t.Fatalf("%s Expected %v == %v", message, expected.Mounts, actual.Mounts)
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}
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}
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