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New pod log directory /var/log/pods/NAMESPACE_NAME_UID.

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Signed-off-by: Lantao Liu <lantaol@google.com>
This commit is contained in:
Lantao Liu 2019-02-22 01:30:43 -08:00
parent 8bde75e63f
commit f14c6c95d6
11 changed files with 49 additions and 30 deletions
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25
pkg/kubelet/kuberuntime/helpers.go
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@ -163,24 +163,31 @@ func getStableKey(pod *v1.Pod, container *v1.Container) string {
return fmt.Sprintf("%s_%s_%s_%s_%s", pod.Name, pod.Namespace, string(pod.UID), container.Name, hash)
}
// logPathDelimiter is the delimiter used in the log path.
const logPathDelimiter = "_"
// buildContainerLogsPath builds log path for container relative to pod logs directory.
func buildContainerLogsPath(containerName string, restartCount int) string {
return filepath.Join(containerName, fmt.Sprintf("%d.log", restartCount))
}
// buildFullContainerLogsPath builds absolute log path for container.
func buildFullContainerLogsPath(podUID types.UID, containerName string, restartCount int) string {
return filepath.Join(buildPodLogsDirectory(podUID), buildContainerLogsPath(containerName, restartCount))
}
// BuildContainerLogsDirectory builds absolute log directory path for a container in pod.
func BuildContainerLogsDirectory(podUID types.UID, containerName string) string {
return filepath.Join(buildPodLogsDirectory(podUID), containerName)
func BuildContainerLogsDirectory(podNamespace, podName string, podUID types.UID, containerName string) string {
return filepath.Join(buildPodLogsDirectory(podNamespace, podName, podUID), containerName)
}
// buildPodLogsDirectory builds absolute log directory path for a pod sandbox.
func buildPodLogsDirectory(podUID types.UID) string {
return filepath.Join(podLogsRootDirectory, string(podUID))
func buildPodLogsDirectory(podNamespace, podName string, podUID types.UID) string {
return filepath.Join(podLogsRootDirectory, strings.Join([]string{podNamespace, podName,
string(podUID)}, logPathDelimiter))
}
// parsePodUIDFromLogsDirectory parses pod logs directory name and returns the pod UID.
// It supports both the old pod log directory /var/log/pods/UID, and the new pod log
// directory /var/log/pods/NAMESPACE_NAME_UID.
func parsePodUIDFromLogsDirectory(name string) types.UID {
parts := strings.Split(name, logPathDelimiter)
return types.UID(parts[len(parts)-1])
}
// toKubeRuntimeStatus converts the runtimeapi.RuntimeStatus to kubecontainer.RuntimeStatus.

9
pkg/kubelet/kuberuntime/kuberuntime_container.go
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@ -205,7 +205,7 @@ func (m *kubeGenericRuntimeManager) generateContainerConfig(container *v1.Contai
}
command, args := kubecontainer.ExpandContainerCommandAndArgs(container, opts.Envs)
logDir := BuildContainerLogsDirectory(kubetypes.UID(pod.UID), container.Name)
logDir := BuildContainerLogsDirectory(pod.Namespace, pod.Name, pod.UID, container.Name)
err = m.osInterface.MkdirAll(logDir, 0755)
if err != nil {
return nil, cleanupAction, fmt.Errorf("create container log directory for container %s failed: %v", container.Name, err)
@ -402,7 +402,6 @@ func (m *kubeGenericRuntimeManager) getPodContainerStatuses(uid kubetypes.UID, n
if status.State == runtimeapi.ContainerState_CONTAINER_EXITED {
// Populate the termination message if needed.
annotatedInfo := getContainerInfoFromAnnotations(status.Annotations)
labeledInfo := getContainerInfoFromLabels(status.Labels)
fallbackToLogs := annotatedInfo.TerminationMessagePolicy == v1.TerminationMessageFallbackToLogsOnError && cStatus.ExitCode != 0
tMessage, checkLogs := getTerminationMessage(status, annotatedInfo.TerminationMessagePath, fallbackToLogs)
if checkLogs {
@ -413,8 +412,7 @@ func (m *kubeGenericRuntimeManager) getPodContainerStatuses(uid kubetypes.UID, n
tMessage = fmt.Sprintf("Error reading termination message from logs: %v", err)
}
} else {
path := buildFullContainerLogsPath(uid, labeledInfo.ContainerName, annotatedInfo.RestartCount)
tMessage = m.readLastStringFromContainerLogs(path)
tMessage = m.readLastStringFromContainerLogs(status.GetLogPath())
}
}
// Use the termination message written by the application is not empty
@ -824,8 +822,7 @@ func (m *kubeGenericRuntimeManager) removeContainerLog(containerID string) error
return fmt.Errorf("failed to get container status %q: %v", containerID, err)
}
labeledInfo := getContainerInfoFromLabels(status.Labels)
annotatedInfo := getContainerInfoFromAnnotations(status.Annotations)
path := buildFullContainerLogsPath(labeledInfo.PodUID, labeledInfo.ContainerName, annotatedInfo.RestartCount)
path := status.GetLogPath()
if err := m.osInterface.Remove(path); err != nil && !os.IsNotExist(err) {
return fmt.Errorf("failed to remove container %q log %q: %v", containerID, path, err)
}

2
pkg/kubelet/kuberuntime/kuberuntime_container_test.go
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@ -61,7 +61,7 @@ func TestRemoveContainer(t *testing.T) {
err = m.removeContainer(containerID)
assert.NoError(t, err)
// Verify container log is removed
expectedContainerLogPath := filepath.Join(podLogsRootDirectory, "12345678", "foo", "0.log")
expectedContainerLogPath := filepath.Join(podLogsRootDirectory, "new_bar_12345678", "foo", "0.log")
expectedContainerLogSymlink := legacyLogSymlink(containerID, "foo", "bar", "new")
assert.Equal(t, fakeOS.Removes, []string{expectedContainerLogPath, expectedContainerLogSymlink})
// Verify container is removed

2
pkg/kubelet/kuberuntime/kuberuntime_gc.go
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@ -339,7 +339,7 @@ func (cgc *containerGC) evictPodLogsDirectories(allSourcesReady bool) error {
}
for _, dir := range dirs {
name := dir.Name()
podUID := types.UID(name)
podUID := parsePodUIDFromLogsDirectory(name)
if !cgc.podStateProvider.IsPodDeleted(podUID) {
continue
}

10
pkg/kubelet/kuberuntime/kuberuntime_gc_test.go
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@ -412,10 +412,16 @@ func TestPodLogDirectoryGC(t *testing.T) {
// pod log directories without corresponding pods should be removed.
podStateProvider.existingPods["123"] = struct{}{}
podStateProvider.existingPods["456"] = struct{}{}
podStateProvider.existingPods["321"] = struct{}{}
podStateProvider.runningPods["123"] = struct{}{}
podStateProvider.runningPods["456"] = struct{}{}
files := []string{"123", "456", "789", "012"}
removed := []string{filepath.Join(podLogsRootDirectory, "789"), filepath.Join(podLogsRootDirectory, "012")}
podStateProvider.existingPods["321"] = struct{}{}
files := []string{"123", "456", "789", "012", "name_namespace_321", "name_namespace_654"}
removed := []string{
filepath.Join(podLogsRootDirectory, "789"),
filepath.Join(podLogsRootDirectory, "012"),
filepath.Join(podLogsRootDirectory, "name_namespace_654"),
}
ctrl := gomock.NewController(t)
defer ctrl.Finish()

2
pkg/kubelet/kuberuntime/kuberuntime_manager_test.go
View File

@ -17,6 +17,7 @@ limitations under the License.
package kuberuntime
import (
"path/filepath"
"reflect"
"sort"
"testing"
@ -158,6 +159,7 @@ func makeFakeContainer(t *testing.T, m *kubeGenericRuntimeManager, template cont
State: template.state,
Labels: containerConfig.Labels,
Annotations: containerConfig.Annotations,
LogPath: filepath.Join(sandboxConfig.GetLogDirectory(), containerConfig.GetLogPath()),
},
SandboxID: podSandboxID,
}

2
pkg/kubelet/kuberuntime/kuberuntime_sandbox.go
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@ -103,7 +103,7 @@ func (m *kubeGenericRuntimeManager) generatePodSandboxConfig(pod *v1.Pod, attemp
podSandboxConfig.Hostname = hostname
}
logDir := buildPodLogsDirectory(pod.UID)
logDir := buildPodLogsDirectory(pod.Namespace, pod.Name, pod.UID)
podSandboxConfig.LogDirectory = logDir
portMappings := []*runtimeapi.PortMapping{}

2
pkg/kubelet/kuberuntime/kuberuntime_sandbox_test.go
View File

@ -44,7 +44,7 @@ func TestCreatePodSandbox(t *testing.T) {
fakeOS := m.osInterface.(*containertest.FakeOS)
fakeOS.MkdirAllFn = func(path string, perm os.FileMode) error {
// Check pod logs root directory is created.
assert.Equal(t, filepath.Join(podLogsRootDirectory, "12345678"), path)
assert.Equal(t, filepath.Join(podLogsRootDirectory, pod.Namespace+"_"+pod.Name+"_12345678"), path)
assert.Equal(t, os.FileMode(0755), perm)
return nil
}

11
pkg/kubelet/stats/cri_stats_provider.go
View File

@ -189,7 +189,7 @@ func (p *criStatsProvider) listPodStats(updateCPUNanoCoreUsage bool) ([]statsapi
}
// Fill available stats for full set of required pod stats
cs := p.makeContainerStats(stats, container, &rootFsInfo, fsIDtoInfo, podSandbox.GetMetadata().GetUid(), updateCPUNanoCoreUsage)
cs := p.makeContainerStats(stats, container, &rootFsInfo, fsIDtoInfo, podSandbox.GetMetadata(), updateCPUNanoCoreUsage)
p.addPodNetworkStats(ps, podSandboxID, caInfos, cs, containerNetworkStats[podSandboxID])
p.addPodCPUMemoryStats(ps, types.UID(podSandbox.Metadata.Uid), allInfos, cs)
@ -476,7 +476,7 @@ func (p *criStatsProvider) makeContainerStats(
container *runtimeapi.Container,
rootFsInfo *cadvisorapiv2.FsInfo,
fsIDtoInfo map[runtimeapi.FilesystemIdentifier]*cadvisorapiv2.FsInfo,
uid string,
meta *runtimeapi.PodSandboxMetadata,
updateCPUNanoCoreUsage bool,
) *statsapi.ContainerStats {
result := &statsapi.ContainerStats{
@ -543,7 +543,12 @@ func (p *criStatsProvider) makeContainerStats(
result.Rootfs.Inodes = imageFsInfo.Inodes
}
}
containerLogPath := kuberuntime.BuildContainerLogsDirectory(types.UID(uid), container.GetMetadata().GetName())
// NOTE: This doesn't support the old pod log path, `/var/log/pods/UID`. For containers
// using old log path, empty log stats are returned. This is fine, because we don't
// officially support in-place upgrade anyway.
containerLogPath := kuberuntime.BuildContainerLogsDirectory(meta.GetNamespace(),
meta.GetName(), types.UID(meta.GetUid()), container.GetMetadata().GetName())
// TODO(random-liu): Collect log stats for logs under the pod log directory.
result.Logs = p.getContainerLogStats(containerLogPath, rootFsInfo)
return result
}

10
pkg/kubelet/stats/cri_stats_provider_test.go
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@ -166,11 +166,11 @@ func TestCRIListPodStats(t *testing.T) {
}
fakeLogStats := map[string]*volume.Metrics{
kuberuntime.BuildContainerLogsDirectory(types.UID("sandbox0-uid"), cName0): containerLogStats0,
kuberuntime.BuildContainerLogsDirectory(types.UID("sandbox0-uid"), cName1): containerLogStats1,
kuberuntime.BuildContainerLogsDirectory(types.UID("sandbox1-uid"), cName2): containerLogStats2,
kuberuntime.BuildContainerLogsDirectory(types.UID("sandbox2-uid"), cName3): containerLogStats4,
kuberuntime.BuildContainerLogsDirectory(types.UID("sandbox3-uid"), cName5): containerLogStats5,
kuberuntime.BuildContainerLogsDirectory("sandbox0-ns", "sandbox0-name", types.UID("sandbox0-uid"), cName0): containerLogStats0,
kuberuntime.BuildContainerLogsDirectory("sandbox0-ns", "sandbox0-name", types.UID("sandbox0-uid"), cName1): containerLogStats1,
kuberuntime.BuildContainerLogsDirectory("sandbox1-ns", "sandbox1-name", types.UID("sandbox1-uid"), cName2): containerLogStats2,
kuberuntime.BuildContainerLogsDirectory("sandbox2-ns", "sandbox2-name", types.UID("sandbox2-uid"), cName3): containerLogStats4,
kuberuntime.BuildContainerLogsDirectory("sandbox3-ns", "sandbox3-name", types.UID("sandbox3-uid"), cName5): containerLogStats5,
}
fakeLogStatsProvider := NewFakeLogMetricsService(fakeLogStats)

4
test/e2e_node/log_path_test.go
View File

@ -157,10 +157,12 @@ var _ = framework.KubeDescribe("ContainerLogPath [NodeConformance]", func() {
// get podID from created Pod
createdLogPod, err := podClient.Get(logPodName, metav1.GetOptions{})
podNs := createdLogPod.Namespace
podName := createdLogPod.Name
podID := string(createdLogPod.UID)
// build log cri file path
expectedCRILogFile := logCRIDir + "/" + podID + "/" + logContainerName + "/0.log"
expectedCRILogFile := logCRIDir + "/" + podNs + "_" + podName + "_" + podID + "/" + logContainerName + "/0.log"
logCRICheckPodName := "log-cri-check-" + string(uuid.NewUUID())
err = createAndWaitPod(makeLogCheckPod(logCRICheckPodName, logString, expectedCRILogFile))