Merge remote-tracking branch 'origin/main' into release/4.0

Author: rjeberhard

documentation/4.0/content/faq/resource-settings.md

@@ -199,6 +199,13 @@ There's no memory or CPU limit configured by default in samples and so the defau
 
 If you wish to set resource requests or limits differently on a sample Domain or Cluster YAML file or template, see [Setting resource requests and limits in a Domain or Cluster resource](#setting-resource-requests-and-limits-in-a-domain-or-cluster-resource). Or, for samples that generate their Domain resource using an "inputs" YAML file, see the `serverPodMemoryRequest`, `serverPodMemoryLimit`, `serverPodCpuRequest`, and `serverPodCpuLimit` parameters in the sample's `create-domain.sh` inputs file.
 
+#### Burstable pods and JDK active processor count calculation
+If you have [Burstable Pods](https://kubernetes.io/docs/tasks/configure-pod-container/quality-service-pod/#create-a-pod-that-gets-assigned-a-qos-class-of-burstable) that configure the CPU resource requests but have no CPU limits, then the JDK can incorrectly calculate the active processor count. The JDK interprets the value of the `--cpu-shares` parameter (which maps to `spec.containers[].resources.requests.cpu`) to limit how many CPUs the current process can use, as explained in [JDK-8288367](https://bugs.openjdk.org/browse/JDK-8288367). This might cause the JVM to use fewer CPUs than available, leading to an under utilization of CPU resources when running in a Kubernetes environment. Updating the JDK to newer versions, `JDK 8u371` or `JDK 11.0.17`, fixes this. 
+
+{{% notice note %}}
+To override the number of CPUs that the JVM automatically detects and uses when creating threads for various subsystems, use the `-XX:ActiveProcessorCount` Java option.
+{{% /notice %}}
+
 #### Configuring CPU affinity
 
 A Kubernetes hosted WebLogic Server may exhibit high lock contention in comparison to an on-premises deployment. This lock contention may be due to a lack of CPU cache affinity or scheduling latency when workloads move between different CPU cores.  

documentation/4.0/content/release-notes.md

@@ -124,6 +124,8 @@ draft: false
   * Added `.spec.configuration.model.auxiliaryImages` for simplified configuration of auxiliary images.
   * Added several additional advanced settings related to auxiliary images including `.spec.configuration.model.auxiliaryImageVolumeMountPath`, `.spec.configuration.model.auxiliaryImageVolumeMedium`, and `.spec.configuration.model.auxiliaryImageVolumeSizeLimit`.
   * Removed `.spec.serverPod.auxiliaryImages` and `.spec.auxiliaryImageVolumes` as part of the simplification effort.
+  * Default change for `domain.spec.configuration.model.wdtInstallHome` to `/aux/weblogic-deploy` if `spec.configuration.model.AuxiliaryImages` are specified, and to `/u01/wdt/weblogic-deploy` otherwise. It previously always defaulted to `/u01/wdt/weblogic-deploy`.
+  * Default change for `domain.spec.configuration.model.wdtModelHome` to `/aux/models` if `spec.configuration.model.AuxiliaryImages` are specified, and to `/u01/wdt/models` otherwise. It previously always defaulted to `/u01/wdt/models`. 
 
 * Cluster changes.
   * Moved content under `.spec.clusters[*]` to the new Cluster resource `.spec`.

kubernetes/charts/weblogic-operator/templates/_operator-dep.tpl

@@ -46,6 +46,10 @@ spec:
       affinity:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
       containers:
       - name: "weblogic-operator"
         image: {{ .image | quote }}

kubernetes/charts/weblogic-operator/values.yaml

@@ -182,6 +182,11 @@ preserveWebhook: false
 # for more information on affinity and anti-affinity.
 #affinity:
 
+# tolerations and taints work together to ensure that pods are not scheduled on inappropriate nodes. If the tolerations value is specified,
+# then this content will be added to the operator's deployment. See https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/
+# for more information on tolerations and taints.
+#tolerations:
+
 # Values related to debugging the operator.
 # Customers should not need to use the following properties