// Creates a name which can be reversed to identify both full pod name and container name.
func BuildDockerName(dockerName QingletContainerName, container *api.Container) string {
containerName := dockerName.ContainerName + "." + strconv.FormatUint(qingcontainer.HashContainer(container), 16)
return fmt.Sprintf("%s_%s_%s_%s_%08x",
containerNamePrefix,
containerName,
dockerName.PodFullName,
dockerName.PodUID,
rand.Uint32())
}
// TODO(yifan): Remove the receiver once we can solve the appName->imageID problem.
func (r *runtime) apiPodToruntimePod(uuid string, pod *api.Pod) *qingcontainer.Pod {
p := &qingcontainer.Pod{
ID: pod.UID,
Name: pod.Name,
Namespace: pod.Namespace,
}
for i := range pod.Spec.Containers {
c := &pod.Spec.Containers[i]
img, err := r.getImageByName(c.Image)
if err != nil {
glog.Warningf("rkt: Cannot get image for %q: %v", c.Image, err)
}
p.Containers = append(p.Containers, &qingcontainer.Container{
ID: types.UID(buildContainerID(&containerID{uuid, c.Name, img.id})),
Name: c.Name,
Image: c.Image,
Hash: qingcontainer.HashContainer(c),
Created: time.Now().Unix(),
})
}
return p
}
func TestRunOnce(t *testing.T) {
cadvisor := &cadvisor.Mock{}
cadvisor.On("MachineInfo").Return(&cadvisorApi.MachineInfo{}, nil)
podManager, _ := newFakePodManager()
kb := &Qinglet{
rootDirectory: "/tmp/qinglet",
recorder: &record.FakeRecorder{},
cadvisor: cadvisor,
nodeLister: testNodeLister{},
statusManager: newStatusManager(nil),
containerRefManager: qingcontainer.NewRefManager(),
readinessManager: qingcontainer.NewReadinessManager(),
podManager: podManager,
os: qingcontainer.FakeOS{},
volumeManager: newVolumeManager(),
}
kb.containerManager, _ = newContainerManager(cadvisor, "", "", "")
kb.networkPlugin, _ = network.InitNetworkPlugin([]network.NetworkPlugin{}, "", network.NewFakeHost(nil))
if err := kb.setupDataDirs(); err != nil {
t.Errorf("Failed to init data dirs: %v", err)
}
podContainers := []docker.APIContainers{
{
Names: []string{"/k8s_bar." + strconv.FormatUint(qingcontainer.HashContainer(&api.Container{Name: "bar"}), 16) + "_foo_new_12345678_42"},
ID: "1234",
Status: "running",
},
{
Names: []string{"/k8s_net_foo.new.test_abcdefgh_42"},
ID: "9876",
Status: "running",
},
}
kb.dockerClient = &testDocker{
listContainersResults: []listContainersResult{
{label: "list pod container", containers: []docker.APIContainers{}},
{label: "syncPod", containers: []docker.APIContainers{}},
{label: "list pod container", containers: []docker.APIContainers{}},
{label: "syncPod", containers: podContainers},
{label: "list pod container", containers: podContainers},
{label: "list pod container", containers: podContainers},
},
inspectContainersResults: []inspectContainersResult{
{
label: "syncPod",
container: docker.Container{
Config: &docker.Config{Image: "someimage"},
State: docker.State{Running: true, Pid: 42},
},
},
{
label: "syncPod",
container: docker.Container{
Config: &docker.Config{Image: "someimage"},
State: docker.State{Running: true, Pid: 42},
},
},
{
label: "syncPod",
container: docker.Container{
Config: &docker.Config{Image: "someimage"},
State: docker.State{Running: true, Pid: 42},
},
},
{
label: "syncPod",
container: docker.Container{
Config: &docker.Config{Image: "someimage"},
State: docker.State{Running: true, Pid: 42},
},
},
},
t: t,
}
kb.containerRuntime = dockertools.NewFakeDockerManager(
kb.dockerClient,
kb.recorder,
kb.readinessManager,
kb.containerRefManager,
dockertools.PodInfraContainerImage,
0,
0,
"",
qingcontainer.FakeOS{},
kb.networkPlugin,
kb,
nil,
newQingletRuntimeHooks(kb.recorder))
pods := []*api.Pod{
{
ObjectMeta: api.ObjectMeta{
UID: "12345678",
Name: "foo",
Namespace: "new",
},
Spec: api.PodSpec{
Containers: []api.Container{
{Name: "bar"},
},
},
},
}
podManager.SetPods(pods)
results, err := kb.runOnce(pods, time.Millisecond)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if results[0].Err != nil {
t.Errorf("unexpected run pod error: %v", results[0].Err)
}
if results[0].Pod.Name != "foo" {
t.Errorf("unexpected pod: %q", results[0].Pod.Name)
}
}
// SyncPod syncs the running pod to match the specified desired pod.
func (r *runtime) SyncPod(pod *api.Pod, runningPod qingcontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret) error {
podFullName := qingcontainer.GetPodFullName(pod)
if len(runningPod.Containers) == 0 {
glog.V(4).Infof("Pod %q is not running, will start it", podFullName)
return r.RunPod(pod)
}
// Add references to all containers.
unidentifiedContainers := make(map[types.UID]*qingcontainer.Container)
for _, c := range runningPod.Containers {
unidentifiedContainers[c.ID] = c
}
restartPod := false
for _, container := range pod.Spec.Containers {
expectedHash := qingcontainer.HashContainer(&container)
c := runningPod.FindContainerByName(container.Name)
if c == nil {
if qingcontainer.ShouldContainerBeRestarted(&container, pod, &podStatus, r.readinessManager) {
glog.V(3).Infof("Container %+v is dead, but RestartPolicy says that we should restart it.", container)
// TODO(yifan): Containers in one pod are fate-sharing at this moment, see:
// https://github.com/appc/spec/issues/276.
restartPod = true
break
}
continue
}
// TODO(yifan): Take care of host network change.
containerChanged := c.Hash != 0 && c.Hash != expectedHash
if containerChanged {
glog.Infof("Pod %q container %q hash changed (%d vs %d), it will be killed and re-created.", podFullName, container.Name, c.Hash, expectedHash)
restartPod = true
break
}
result, err := r.prober.Probe(pod, podStatus, container, string(c.ID), c.Created)
// TODO(vmarmol): examine this logic.
if err == nil && result != probe.Success {
glog.Infof("Pod %q container %q is unhealthy (probe result: %v), it will be killed and re-created.", podFullName, container.Name, result)
restartPod = true
break
}
if err != nil {
glog.V(2).Infof("Probe container %q failed: %v", container.Name, err)
}
delete(unidentifiedContainers, c.ID)
}
// If there is any unidentified containers, restart the pod.
if len(unidentifiedContainers) > 0 {
restartPod = true
}
if restartPod {
// TODO(yifan): Handle network plugin.
if err := r.KillPod(runningPod); err != nil {
return err
}
if err := r.RunPod(pod); err != nil {
return err
}
}
return nil
}