Cluster.md

Cluster

A Cluster resource describes the lifecycle options for all of the Managed Server members of a WebLogic cluster, including Java options, environment variables, additional Pod content, and the ability to explicitly start, stop, or restart cluster members. It must describe a cluster that already exists in the WebLogic domain configuration. See also domain.spec.clusters.

Name	Type	Description
apiVersion	string	The API version defines the versioned schema of this cluster.
kind	string	The type of the REST resource. Must be "Cluster".
metadata	Object Meta	The resource metadata. Must include the name and `namespace.
spec	Cluster Spec	The specification of the operation of the WebLogic cluster. Required.
status	Cluster Status	The current status of the operation of the WebLogic cluster. Updated automatically by the operator.

Cluster Spec

The specification of the operation of the WebLogic cluster. Required.

Name	Type	Description
clusterName	string	The name of the cluster. This value must match the name of a WebLogic cluster already defined in the WebLogic domain configuration. Required.
clusterService	Cluster Service	Customization affecting Kubernetes Service generated for this WebLogic cluster.
maxConcurrentShutdown	integer	The maximum number of WebLogic Server instances that will shut down in parallel for this cluster when it is being partially shut down by lowering its replica count. A value of 0 means there is no limit. Defaults to spec.maxClusterConcurrentShutdown, which defaults to 1.
maxConcurrentStartup	integer	The maximum number of Managed Servers instances that the operator will start in parallel for this cluster in response to a change in the replicas count. If more Managed Server instances must be started, the operator will wait until a Managed Server Pod is in the Ready state before starting the next Managed Server instance. A value of 0 means all Managed Server instances will start in parallel. Defaults to domain.spec.maxClusterConcurrentStartup, which defaults to 0.
maxUnavailable	integer	The maximum number of cluster members that can be temporarily unavailable. Defaults to domain.spec.maxClusterUnavailable, which defaults to 1.
replicas	integer	The number of cluster member Managed Server instances to start for this WebLogic cluster. The operator will sort cluster member Managed Server names from the WebLogic domain configuration by normalizing any numbers in the Managed Server name and then sorting alphabetically. This is done so that server names such as "managed-server10" come after "managed-server9". The operator will then start Managed Server instances from the sorted list, up to the replicas count, unless specific Managed Servers are specified as starting in their entry under the managedServers field. In that case, the specified Managed Server instances will be started and then additional cluster members will be started, up to the replicas count, by finding further cluster members in the sorted list that are not already started. If cluster members are started because of their related entries under managedServers, then this cluster may have more cluster members running than its replicas count. Defaults to domain.spec.replicas, which defaults 1.
restartVersion	string	Changes to this field cause the operator to restart WebLogic Server instances. More info: https://oracle.github.io/weblogic-kubernetes-operator/userguide/managing-domains/domain-lifecycle/startup/#restarting-servers.
serverPod	Server Pod	Customization affecting the generation of Pods for WebLogic Server instances.
serverService	Server Service	Customization affecting the generation of ClusterIP Services for WebLogic Server instances.
serverStartPolicy	string	The strategy for deciding whether to start a WebLogic Server instance. Legal values are Never, or IfNeeded. Defaults to IfNeeded. More info: https://oracle.github.io/weblogic-kubernetes-operator/userguide/managing-domains/domain-lifecycle/startup/#starting-and-stopping-servers.

Cluster Status

Name	Type	Description
clusterName	string	WebLogic cluster name.
conditions	Array of Cluster Condition	Current service state of the cluster.
labelSelector	string	Label selector that can be used to discover Pods associated with WebLogic managed servers belonging to this cluster. Must be set to work with HorizontalPodAutoscaler.
maximumReplicas	integer	The maximum number of cluster members.
minimumReplicas	integer	The minimum number of cluster members.
observedGeneration	integer	The Cluster resource generation observed by the WebLogic operator. If the Cluster resource exists, then this value will match the 'cluster.metadata.generation' when the 'cluster.status' correctly reflects the latest cluster resource changes.
readyReplicas	integer	The number of ready cluster members.
replicas	integer	The number of currently running cluster members.
replicasGoal	integer	The requested number of cluster members. Cluster members will be started by the operator if this value is larger than zero.

Cluster Service

Name	Type	Description
annotations	Map	The annotations to be added to generated resources.
labels	Map	The labels to be added to generated resources. The label names must not start with "weblogic.".
sessionAffinity	string	Advanced setting to enable client IP based session affinity. Must be ClientIP or None. Defaults to None. More info: https://oracle.github.io/weblogic-kubernetes-operator/managing-domains/domain-resource/#cluster-spec-elements

Server Pod

Name	Type	Description
affinity	Affinity	The Pod's scheduling constraints. More info: https://oracle.github.io/weblogic-kubernetes-operator/faq/node-heating/. See kubectl explain pods.spec.affinity.
annotations	Map	The annotations to be added to generated resources.
automountServiceAccountToken	Boolean	Indicates whether a service account token should be automatically mounted on the pod. Defaults to true if not set. See kubectl explain pods.spec.automountServiceAccountToken.
containers	Array of Container	Additional containers to be included in the server Pod. See kubectl explain pods.spec.containers.
containerSecurityContext	Security Context	Container-level security attributes. Will override any matching Pod-level attributes. See kubectl explain pods.spec.containers.securityContext. If no value is specified for this field, the operator will use default content for container-level securityContext. More info: https://oracle.github.io/weblogic-kubernetes-operator/security/domain-security/pod-and-container/.
env	Array of Env Var	A list of environment variables to set in the container running a WebLogic Server instance. More info: https://oracle.github.io/weblogic-kubernetes-operator/userguide/managing-domains/domain-resource/#jvm-memory-and-java-option-environment-variables. See kubectl explain pods.spec.containers.env.
envFrom	Array of Env From Source	List of sources to populate environment variables in the container running a WebLogic Server instance. The sources include either a config map or a secret. The operator will not expand the dependent variables in the 'envFrom' source. More details: https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/#define-an-environment-variable-for-a-container. Also see: https://oracle.github.io/weblogic-kubernetes-operator/userguide/managing-domains/domain-resource/#jvm-memory-and-java-option-environment-variables.
hostAliases	Array of Host Alias	HostAliases is an optional list of hosts and IPs that will be injected into the pod's hosts file if specified. This is only valid for non-hostNetwork pods.
initContainers	Array of Container	Initialization containers to be included in the server Pod. See kubectl explain pods.spec.initContainers.
labels	Map	The labels to be added to generated resources. The label names must not start with "weblogic.".
livenessProbe	Probe	Settings for the liveness probe associated with a WebLogic Server instance. If not specified, the operator will create a probe that executes a script provided by the operator. The operator will also fill in any missing tuning-related fields, if they are unspecified. Tuning-related fields will be inherited from the domain and cluster scopes unless a more specific scope defines a different action, such as a different script to execute.
maxPendingWaitTimeSeconds	integer	The maximum time in seconds that the operator waits for a WebLogic Server pod to reach the running state before it considers the pod failed. Defaults to 5 minutes.
maxReadyWaitTimeSeconds	integer	The maximum time in seconds that the operator waits for a WebLogic Server pod to reach the ready state before it considers the pod failed. Defaults to 1800 seconds.
nodeName	string	NodeName is a request to schedule this Pod onto a specific Node. If it is non-empty, the scheduler simply schedules this pod onto that node, assuming that it fits the resource requirements. See kubectl explain pods.spec.nodeName.
nodeSelector	Map	Selector which must match a Node's labels for the Pod to be scheduled on that Node. See kubectl explain pods.spec.nodeSelector.
podSecurityContext	Pod Security Context	Pod-level security attributes. See kubectl explain pods.spec.securityContext. If no value is specified for this field, the operator will use default content for the pod-level securityContext. More info: https://oracle.github.io/weblogic-kubernetes-operator/security/domain-security/pod-and-container/.
priorityClassName	string	If specified, indicates the Pod's priority. "system-node-critical" and "system-cluster-critical" are two special keywords which indicate the highest priorities with the former being the highest priority. Any other name must be defined by creating a PriorityClass object with that name. If not specified, the pod priority will be the default or zero, if there is no default. See kubectl explain pods.spec.priorityClassName.
readinessGates	Array of Pod Readiness Gate	If specified, all readiness gates will be evaluated for Pod readiness. A Pod is ready when all its containers are ready AND all conditions specified in the readiness gates have a status equal to "True". More info: https://github.com/kubernetes/community/blob/master/keps/sig-network/0007-pod-ready%2B%2B.md.
readinessProbe	Probe	Settings for the readiness probe associated with a WebLogic Server instance. If not specified, the operator will create an HTTP probe accessing the /weblogic/ready path. If an HTTP probe is specified then the operator will fill in path, port, and scheme, if they are missing. The operator will also fill in any missing tuning-related fields if they are unspecified. Tuning-related fields will be inherited from the domain and cluster scopes unless a more specific scope defines a different action, such as a different HTTP path to access.
resources	Resource Requirements	Memory and CPU minimum requirements and limits for the WebLogic Server instance. See kubectl explain pods.spec.containers.resources.
restartPolicy	string	Restart policy for all containers within the Pod. One of Always, OnFailure, Never. Default to Always. More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#restart-policy. See kubectl explain pods.spec.restartPolicy.
runtimeClassName	string	RuntimeClassName refers to a RuntimeClass object in the node.k8s.io group, which should be used to run this Pod. If no RuntimeClass resource matches the named class, the Pod will not be run. If unset or empty, the "legacy" RuntimeClass will be used, which is an implicit class with an empty definition that uses the default runtime handler. More info: https://github.com/kubernetes/community/blob/master/keps/sig-node/0014-runtime-class.md This is an alpha feature and may change in the future. See kubectl explain pods.spec.runtimeClassName.
schedulerName	string	If specified, the Pod will be dispatched by the specified scheduler. If not specified, the Pod will be dispatched by the default scheduler. See kubectl explain pods.spec.schedulerName.
serviceAccountName	string	Name of the ServiceAccount to be used to run this Pod. If it is not set, default ServiceAccount will be used. The ServiceAccount has to exist at the time the Pod is created. See kubectl explain pods.spec.serviceAccountName.
shutdown	Shutdown	Configures how the operator should shut down the server instance.
startupProbe	Probe	Settings for the startup probe associated with a WebLogic Server instance. If not specified, the operator will not create a default startup probe.
tolerations	Array of Toleration	If specified, the Pod's tolerations. See kubectl explain pods.spec.tolerations.
topologySpreadConstraints	Array of Topology Spread Constraint	TopologySpreadConstraints describes how a group of pods ought to spread across topology domains. Scheduler will schedule pods in a way which abides by the constraints. All topologySpreadConstraints are ANDed.
volumeMounts	Array of Volume Mount	Additional volume mounts for the container running a WebLogic Server instance. See kubectl explain pods.spec.containers.volumeMounts.
volumes	Array of Volume	Additional volumes to be created in the server Pod. See kubectl explain pods.spec.volumes.

Server Service

Name	Type	Description
annotations	Map	The annotations to be added to generated resources.
labels	Map	The labels to be added to generated resources. The label names must not start with "weblogic.".
precreateService	Boolean	If true, the operator will create ClusterIP Services even for WebLogic Server instances without running Pods.

Cluster Condition

Name	Type	Description
lastTransitionTime	DateTime	Last time the condition transitioned from one status to another.
message	string	Human-readable message indicating details about last transition.
status	string	The status of the condition. Can be True, False.
type	string	The type of the condition. Valid types are Completed, Available, Failed, and Rolling.

Shutdown

Name	Type	Description
ignoreSessions	Boolean	For graceful shutdown only, indicates to ignore pending HTTP sessions during in-flight work handling. Defaults to false.
shutdownType	string	Specifies how the operator will shut down server instances. Legal values are Graceful and Forced. Defaults to Graceful.
skipWaitingCohEndangeredState	Boolean	For graceful shutdown only, set to true to skip waiting for Coherence Cache Cluster service MBean HAStatus in safe state before shutdown. By default, the operator will wait until it is safe to shutdown the Coherence Cache Cluster. Defaults to false.
timeoutSeconds	integer	For graceful shutdown only, number of seconds to wait before aborting in-flight work and shutting down the server. Defaults to 30 seconds.
waitForAllSessions	Boolean	For graceful shutdown only, set to true to wait for all HTTP sessions during in-flight work handling; false to wait for non-persisted HTTP sessions only. Defaults to false.