第 6 章 Working with clusters

6.1.1. Understanding events

Events allow OpenShift Container Platform to record information about real-world events in a resource-agnostic manner. They also allow developers and administrators to consume information about system components in a unified way.

6.1.2. Viewing events using the CLI

You can get a list of events in a given project using the CLI.

Procedure

To view events in a project use the following command:

$ oc get events [-n <project>] 1

1: The name of the project.

For example:

$ oc get events -n openshift-config

Example output

LAST SEEN   TYPE      REASON                   OBJECT                      MESSAGE
97m         Normal    Scheduled                pod/dapi-env-test-pod       Successfully assigned openshift-config/dapi-env-test-pod to ip-10-0-171-202.ec2.internal
97m         Normal    Pulling                  pod/dapi-env-test-pod       pulling image "gcr.io/google_containers/busybox"
97m         Normal    Pulled                   pod/dapi-env-test-pod       Successfully pulled image "gcr.io/google_containers/busybox"
97m         Normal    Created                  pod/dapi-env-test-pod       Created container
9m5s        Warning   FailedCreatePodSandBox   pod/dapi-volume-test-pod    Failed create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_dapi-volume-test-pod_openshift-config_6bc60c1f-452e-11e9-9140-0eec59c23068_0(748c7a40db3d08c07fb4f9eba774bd5effe5f0d5090a242432a73eee66ba9e22): Multus: Err adding pod to network "openshift-sdn": cannot set "openshift-sdn" ifname to "eth0": no netns: failed to Statfs "/proc/33366/ns/net": no such file or directory
8m31s       Normal    Scheduled                pod/dapi-volume-test-pod    Successfully assigned openshift-config/dapi-volume-test-pod to ip-10-0-171-202.ec2.internal

To view events in your project from the OpenShift Container Platform console.
1. Launch the OpenShift Container Platform console.
2. Click Home Events and select your project.
3. Move to resource that you want to see events. For example: Home Projects <project-name> <resource-name>.
  Many objects, such as pods and deployments, have their own Events tab as well, which shows events related to that object.

6.1.3. List of events

This section describes the events of OpenShift Container Platform.

表 6.1. Configuration events
Name	Description
`FailedValidation`	Failed pod configuration validation.

表 6.2. Container events
Name	Description
`BackOff`	Back-off restarting failed the container.
`Created`	Container created.
`Failed`	Pull/Create/Start failed.
`Killing`	Killing the container.
`Started`	Container started.
`Preempting`	Preempting other pods.
`ExceededGracePeriod`	Container runtime did not stop the pod within specified grace period.

表 6.3. Health events
Name	Description
`Unhealthy`	Container is unhealthy.

表 6.4. Image events
Name	Description
`BackOff`	Back off Ctr Start, image pull.
`ErrImageNeverPull`	The image’s NeverPull Policy is violated.
`Failed`	Failed to pull the image.
`InspectFailed`	Failed to inspect the image.
`Pulled`	Successfully pulled the image or the container image is already present on the machine.
`Pulling`	Pulling the image.

表 6.5. Image Manager events
Name	Description
`FreeDiskSpaceFailed`	Free disk space failed.
`InvalidDiskCapacity`	Invalid disk capacity.

表 6.6. Node events
Name	Description
`FailedMount`	Volume mount failed.
`HostNetworkNotSupported`	Host network not supported.
`HostPortConflict`	Host/port conflict.
`InsufficientFreeCPU`	Insufficient free CPU.
`InsufficientFreeMemory`	Insufficient free memory.
`KubeletSetupFailed`	Kubelet setup failed.
`NilShaper`	Undefined shaper.
`NodeNotReady`	Node is not ready.
`NodeNotSchedulable`	Node is not schedulable.
`NodeReady`	Node is ready.
`NodeSchedulable`	Node is schedulable.
`NodeSelectorMismatching`	Node selector mismatch.
`OutOfDisk`	Out of disk.
`Rebooted`	Node rebooted.
`Starting`	Starting kubelet.
`FailedAttachVolume`	Failed to attach volume.
`FailedDetachVolume`	Failed to detach volume.
`VolumeResizeFailed`	Failed to expand/reduce volume.
`VolumeResizeSuccessful`	Successfully expanded/reduced volume.
`FileSystemResizeFailed`	Failed to expand/reduce file system.
`FileSystemResizeSuccessful`	Successfully expanded/reduced file system.
`FailedUnMount`	Failed to unmount volume.
`FailedMapVolume`	Failed to map a volume.
`FailedUnmapDevice`	Failed unmaped device.
`AlreadyMountedVolume`	Volume is already mounted.
`SuccessfulDetachVolume`	Volume is successfully detached.
`SuccessfulMountVolume`	Volume is successfully mounted.
`SuccessfulUnMountVolume`	Volume is successfully unmounted.
`ContainerGCFailed`	Container garbage collection failed.
`ImageGCFailed`	Image garbage collection failed.
`FailedNodeAllocatableEnforcement`	Failed to enforce System Reserved Cgroup limit.
`NodeAllocatableEnforced`	Enforced System Reserved Cgroup limit.
`UnsupportedMountOption`	Unsupported mount option.
`SandboxChanged`	Pod sandbox changed.
`FailedCreatePodSandBox`	Failed to create pod sandbox.
`FailedPodSandBoxStatus`	Failed pod sandbox status.

表 6.7. Pod worker events
Name	Description
`FailedSync`	Pod sync failed.

表 6.8. System Events
Name	Description
`SystemOOM`	There is an OOM (out of memory) situation on the cluster.

表 6.9. Pod events
Name	Description
`FailedKillPod`	Failed to stop a pod.
`FailedCreatePodContainer`	Failed to create a pod container.
`Failed`	Failed to make pod data directories.
`NetworkNotReady`	Network is not ready.
`FailedCreate`	Error creating: `<error-msg>`.
`SuccessfulCreate`	Created pod: `<pod-name>`.
`FailedDelete`	Error deleting: `<error-msg>`.
`SuccessfulDelete`	Deleted pod: `<pod-id>`.

表 6.10. Horizontal Pod AutoScaler events
Name	Description
SelectorRequired	Selector is required.
`InvalidSelector`	Could not convert selector into a corresponding internal selector object.
`FailedGetObjectMetric`	HPA was unable to compute the replica count.
`InvalidMetricSourceType`	Unknown metric source type.
`ValidMetricFound`	HPA was able to successfully calculate a replica count.
`FailedConvertHPA`	Failed to convert the given HPA.
`FailedGetScale`	HPA controller was unable to get the target’s current scale.
`SucceededGetScale`	HPA controller was able to get the target’s current scale.
`FailedComputeMetricsReplicas`	Failed to compute desired number of replicas based on listed metrics.
`FailedRescale`	New size: `<size>`; reason: `<msg>`; error: `<error-msg>`.
`SuccessfulRescale`	New size: `<size>`; reason: `<msg>`.
`FailedUpdateStatus`	Failed to update status.

表 6.11. Network events (openshift-sdn)
Name	Description
`Starting`	Starting OpenShift-SDN.
`NetworkFailed`	The pod’s network interface has been lost and the pod will be stopped.

表 6.12. Network events (kube-proxy)
Name	Description
`NeedPods`	The service-port `<serviceName>:<port>` needs pods.

表 6.13. Volume events
Name	Description
`FailedBinding`	There are no persistent volumes available and no storage class is set.
`VolumeMismatch`	Volume size or class is different from what is requested in claim.
`VolumeFailedRecycle`	Error creating recycler pod.
`VolumeRecycled`	Occurs when volume is recycled.
`RecyclerPod`	Occurs when pod is recycled.
`VolumeDelete`	Occurs when volume is deleted.
`VolumeFailedDelete`	Error when deleting the volume.
`ExternalProvisioning`	Occurs when volume for the claim is provisioned either manually or via external software.
`ProvisioningFailed`	Failed to provision volume.
`ProvisioningCleanupFailed`	Error cleaning provisioned volume.
`ProvisioningSucceeded`	Occurs when the volume is provisioned successfully.
`WaitForFirstConsumer`	Delay binding until pod scheduling.

表 6.14. Lifecycle hooks
Name	Description
`FailedPostStartHook`	Handler failed for pod start.
`FailedPreStopHook`	Handler failed for pre-stop.
`UnfinishedPreStopHook`	Pre-stop hook unfinished.

表 6.15. Deployments
Name	Description
`DeploymentCancellationFailed`	Failed to cancel deployment.
`DeploymentCancelled`	Canceled deployment.
`DeploymentCreated`	Created new replication controller.
`IngressIPRangeFull`	No available Ingress IP to allocate to service.

表 6.16. Scheduler events
Name	Description
`FailedScheduling`	Failed to schedule pod: `<pod-namespace>/<pod-name>`. This event is raised for multiple reasons, for example: `AssumePodVolumes` failed, Binding rejected etc.
`Preempted`	By `<preemptor-namespace>/<preemptor-name>` on node `<node-name>`.
`Scheduled`	Successfully assigned `<pod-name>` to `<node-name>`.

表 6.17. Daemon set events
Name	Description
`SelectingAll`	This daemon set is selecting all pods. A non-empty selector is required.
`FailedPlacement`	Failed to place pod on `<node-name>`.
`FailedDaemonPod`	Found failed daemon pod `<pod-name>` on node `<node-name>`, will try to kill it.

表 6.18. LoadBalancer service events
Name	Description
`CreatingLoadBalancerFailed`	Error creating load balancer.
`DeletingLoadBalancer`	Deleting load balancer.
`EnsuringLoadBalancer`	Ensuring load balancer.
`EnsuredLoadBalancer`	Ensured load balancer.
`UnAvailableLoadBalancer`	There are no available nodes for `LoadBalancer` service.
`LoadBalancerSourceRanges`	Lists the new `LoadBalancerSourceRanges`. For example, `<old-source-range> <new-source-range>`.
`LoadbalancerIP`	Lists the new IP address. For example, `<old-ip> <new-ip>`.
`ExternalIP`	Lists external IP address. For example, `Added: <external-ip>`.
`UID`	Lists the new UID. For example, `<old-service-uid> <new-service-uid>`.
`ExternalTrafficPolicy`	Lists the new `ExternalTrafficPolicy`. For example, `<old-policy> <new-policy>`.
`HealthCheckNodePort`	Lists the new `HealthCheckNodePort`. For example, `<old-node-port> new-node-port>`.
`UpdatedLoadBalancer`	Updated load balancer with new hosts.
`LoadBalancerUpdateFailed`	Error updating load balancer with new hosts.
`DeletingLoadBalancer`	Deleting load balancer.
`DeletingLoadBalancerFailed`	Error deleting load balancer.
`DeletedLoadBalancer`	Deleted load balancer.

6.1. Viewing system event information in an OpenShift Container Platform cluster

6.1.1. Understanding events

6.1.2. Viewing events using the CLI

6.1.3. List of events

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