Configuration reference

Contents

Introduction

The operator requires Helm for its installation and tuning, and this document is a reference guide for useful Helm commands and operator configuration values.

This document assumes that the operator has been installed using an operator Helm chart. An operator Helm chart can be obtained from the chart repository or can be found in the operator source. For information about operator Helm chart access, installation, and upgrade, see Prepare for installation and Installation and upgrade.

Useful Helm operations

  • You can find out the configuration values that the operator Helm chart supports, as well as the default values, using the helm show command.

    • First, access the operator Helm chart repository using this format, helm repo add <helm-chart-repo-name> <helm-chart-repo-url>: 
      $ helm repo add weblogic-operator https://oracle.github.io/weblogic-kubernetes-operator/charts --force-update
    • Then, use the helm show command with this format: helm show <helm-chart-repo-name>/weblogic-operator. For example, with an operator Helm chart where the repository is named weblogic-operator: 
      $ helm show chart weblogic-operator/weblogic-operator

  • An installed operator is maintained by a Helm release. List the Helm releases for a specified namespace or all namespaces:

    $ helm list --namespace <namespace>

    $ helm list --all-namespaces

  • Get the status of the operator Helm release named sample-weblogic-operator:

    $ helm status sample-weblogic-operator --namespace <namespace>

  • Show the history of the operator Helm release named sample-weblogic-operator:

    $ helm history sample-weblogic-operator --namespace <namespace>

  • Roll back to a previous version of the operator Helm release named sample-weblogic-operator, in this case, the first version:

    $ helm rollback sample-weblogic-operator 1 --namespace <namespace>

  • Show the custom values you configured for a operator Helm release named sample-weblogic-operator:

    $ helm get values sample-weblogic-operator

  • Show all of the values your operator Helm release named sample-weblogic-operator is using:

    $ helm get values --all sample-weblogic-operator

  • Change one or more values using helm upgrade, for example:

    $ helm repo add weblogic-operator https://oracle.github.io/weblogic-kubernetes-operator/charts --force-update
$ helm upgrade \
  weblogic-operator/weblogic-operator \
  --reuse-values \
  --set "domainNamespaces={sample-domains-ns1}" \
  --set "javaLoggingLevel=FINE" \
  --wait

    NOTES:

    • In this example, the --reuse-values flag indicates that previous overrides of other values should be retained.
    • Before changing the javaLoggingLevel setting, consult the Operator logging level advice.

Operator Helm configuration values

This section describes the details of the operator Helm chart’s available configuration values.

Overall operator information

serviceAccount

Specifies the name of the service account in the operator’s namespace that the operator will use to make requests to the Kubernetes API server. You are responsible for creating the service account.

The helm install or helm upgrade command with a non-existing service account results in a Helm chart validation error.

Defaults to default.

Example:

serviceAccount: "weblogic-operator"
kubernetesPlatform

Specify the Kubernetes platform on which the operator is running. This setting has no default, the only valid value is OpenShift; the setting should be left unset for other platforms.

When set to OpenShift, the operator:

  • Sets the domain home file permissions in each WebLogic Server pod to work correctly in OpenShift for Model in Image, and Domain home in Image domains. Specifically, it sets file group permissions so that they match file user permissions.
  • Sets the weblogic.SecureMode.WarnOnInsecureFileSystem Java system property to false on the command line of each WebLogic Server. This flag suppresses insecure file system warnings reported in the WebLogic Server console when the WebLogic Server is in production mode. These warnings result from setting the file permissions necessary to work with restricted security context constraints on OpenShift.

For more information about the security requirements for running WebLogic in OpenShift, see the OpenShift documentation.

Example:

kubernetesPlatform: OpenShift
enableClusterRoleBinding

Specifies whether the roles necessary for the operator to manage domains will be granted using a ClusterRoleBinding rather than using RoleBindings in each managed namespace.

Defaults to true.

This option greatly simplifies managing namespaces when the selection is done using label selectors or regular expressions as the operator will already have privilege in any namespace.

Customers who deploy the operator in Kubernetes clusters that run unrelated workloads will likely not want to use this option. With the enableClusterRoleBinding option, the operator will have privilege in all Kubernetes namespaces. If you want to limit the operator’s privilege to just the set of namespaces that it will manage, then remove this option; this will mean that the operator has privilege only in the set of namespaces that match the selection strategy at the time the Helm release was installed or upgraded.

NOTE: If your operator Helm enableClusterRoleBinding configuration value is false, then a running operator will not have privilege to manage a newly added namespace that matches its namespace selection criteria until you upgrade the operator’s Helm release. See Ensuring the operator has permission to manage a namespace.

Creating the operator pod

image

Specifies the container image containing the operator code.

Defaults to ghcr.io/oracle/weblogic-kubernetes-operator:4.1.8 or similar (based on the default in your Helm chart, see helm show in Useful Helm operations).

Example:

image:  "ghcr.io/oracle/weblogic-kubernetes-operator:some-tag"
imagePullPolicy

Specifies the image pull policy for the operator container image.

Defaults to IfNotPresent.

When using the default images, IfNotPresent is sufficient because the operator will never update an existing image. However, if you have created your own operator image and are updating the image without changing the tag, you might want to use Always.

Example:

image:  "Always"
imagePullSecrets

Contains an optional list of Kubernetes Secrets, in the operator’s namespace, that are needed to access the registry containing the operator image. For example, you might need an operator imagePullSecret if you are using an operator image from a private registry that requires authentication to pull. You are responsible for creating the secret. If no secrets are required, then omit this property. For more information on specifying the registry credentials when the operator image is stored in a private registry, see Customizing operator image name, pull secret, and private registry.

Examples:

  • Using YAML: 
    imagePullSecrets:
- name: "my-image-pull-secret"
  • Using the Helm command line: 
    --set "imagePullSecrets[0].name=my-image-pull-secret"
annotations

Specifies a set of key-value annotations that will be added to each pod running the operator. If no customer defined annotations are required, then omit this property.

Example:

annotations:
  stage: production

You may also specify annotations using the --set parameter to the Helm install command, as follows:

--set annotations.stage=production
labels

Specifies a set of key-value labels that will be added to each pod running the operator. The Helm chart will automatically add any required labels, so the customer is not required to define those here. If no customer defined labels are required, then omit this property.

Example:

labels:
  sidecar.istio.io/inject: "false"

You may also specify labels using the --set parameter to the Helm install command, as follows:

--set labels."sidecar\.istio\.io/inject"=false
nodeSelector

Allows you to run the operator Pod on a Node whose labels match the specified nodeSelector labels. You can use this optional feature if you want the operator Pod to run on a Node with particular labels. For more details, see Assign Pods to Nodes in the Kubernetes documentation. This is not required if the operator Pod can run on any Node.

Example:

nodeSelector:
  disktype: ssd
affinity

Allows you to constrain the operator Pod to be scheduled on a Node with certain labels; it is conceptually similar to nodeSelector. affinity provides advanced capabilities to limit Pod placement on specific Nodes. For more details, see Assign Pods to Nodes in the Kubernetes documentation. This is optional and not required if the operator Pod can run on any Node or when using nodeSelector.

Example:

affinity:
  nodeAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      nodeSelectorTerms:
      - matchExpressions:
        - key: nodeType
          operator: In
          values:
          - dev
          - test
    preferredDuringSchedulingIgnoredDuringExecution:
    - weight: 1
      preference:
        matchExpressions:
        - key: another-node-label-key
          operator: In
          values:
          - another-node-label-value
runAsUser

Specifies the UID to run the operator and conversion webhook container processes. If not specified, it defaults to the user specified in the operator’s container image.

Example:

runAsUser: 1000

WebLogic domain conversion webhook

The WebLogic domain conversion webhook is automatically installed by default when an operator is installed and uninstalled when an operator is uninstalled. You can optionally install and uninstall it independently by using the operator’s Helm chart. For details, see Install the conversion webhook and Uninstall the conversion webhook.

NOTE: By default, the conversion webhook installation uses the same serviceAccount, Elastic Stack integration, and Debugging options configuration values that are used by the operator installation. If you want to use different serviceAccount or Elastic Stack integration or Debugging options for the conversion webhook, then install the conversion webhook independently by using the following webhookOnly configuration value and provide the new value during webhook installation.

webhookOnly

Specifies whether only the conversion webhook should be installed during the helm install and that the operator installation should be skipped. By default, the helm install command installs both the operator and the conversion webhook. If set to true, the helm install will install only the conversion webhook (and not the operator).

Defaults to false.

operatorOnly

NOTE: This is an advanced setting and should be used only in environments where a conversion webhook is already installed. The operator version 4.x requires a conversion webhook to be installed.

Specifies whether only the operator should be installed during the helm install and that the conversion webhook installation should be skipped. By default, the helm install command installs both the operator and the conversion webhook. If set to true, the helm install will install only the operator (and not the conversion webhook).

Defaults to false.

preserveWebhook

Specifies whether the existing conversion webhook deployment should be preserved (not removed) when the release is uninstalled using helm uninstall. By default, the helm uninstall removes both the webhook and the operator installation. If set to true in the helm install command, then the helm uninstall command will not remove the webhook installation. Ignored when webhookOnly is set to true in the helm install command.

Defaults to false.

WebLogic domain management

The settings in this section determine the namespaces that an operator monitors for domain resources. For usage, also see Namespace management.

domainNamespaceSelectionStrategy

Specifies how the operator will select the set of namespaces that it will manage. Legal values are: List, LabelSelector, RegExp, and Dedicated:

  • If set to List, then the operator will manage the set of namespaces listed by the domainNamespaces value.
  • If set to LabelSelector, then the operator will manage the set of namespaces discovered by a list of namespaces using the value specified by domainNamespaceLabelSelector as a label selector.
  • If set to RegExp, then the operator will manage the set of namespaces discovered by a list of namespaces using the value specified by domainNamespaceRegExp as a regular expression matched against the namespace names.
  • Finally, if set to Dedicated, then operator will manage WebLogic domains only in the same namespace which the operator itself is deployed, which is the namespace of the Helm release.

NOTES:

If your operator Helm enableClusterRoleBinding configuration value is false, note that any domain namespaces created after operator installation, requires running helm upgrade on the operator to have the operator rescan for domains to manage, even if, for example, using a LabelSelector where the namespace has a matching label. See Ensuring the operator has permission to manage a namespace.

domainNamespaces

Specifies a list of namespaces that the operator manages. The names must be lowercase. You are responsible for creating these namespaces. The operator will only manage domains found in these namespaces. This value is required if domainNamespaceSelectionStrategy is List and ignored otherwise.

Examples:

  • Example 1: In the following configuration, the operator will manage the default and ns1 Kubernetes Namespaces: 
    domainNamespaces:
- "default"
- "ns1"
  • Example 2: In the following configuration, the operator will manage namespace1 and namespace2: 
    domainNamespaces: [ "namespace1", "namespace2" ]
    Note that this is a valid but different YAML syntax for specifying arrays in comparison to the previous example.
  • Example 3: To specify on the Helm command line: 
    --set "domainNamespaces={namespace1,namespace2}"

NOTES:

  • Defaults to the default namespace.
  • You must include the default namespace in the list if you want the operator to monitor both the default namespace and some other namespaces.
  • If you change domainNamespaces using a helm upgrade command, then the new list completely replaces the original list (they are not merged).
  • For more information, see Namespace Management.
domainNamespaceLabelSelector

Specifies a label selector that will be used when searching for namespaces that the operator will manage. The operator will only manage domains found in namespaces matching this selector. This value is required if domainNamespaceSelectionStrategy is LabelSelector and ignored otherwise.

Examples:

  • Example 1: In the following configuration, the operator will manage namespaces that have the label weblogic-operator regardless of the value of that label: 
    domainNamespaceLabelSelector: weblogic-operator
  • Example 2: In the following configuration, the operator will manage all namespaces that have the label environment, but where the value of that label is not production or systemtest: 
    domainNamespaceLabelSelector: environment notin (production,systemtest)

NOTES:

  • To specify the previous sample on the Helm command line, escape the equal sign, spaces, and commas as follows: 
    --set "domainNamespaceLabelSelector\=environment\\ notin\\ (production\\,systemtest)"
  • If your operator Helm enableClusterRoleBinding configuration value is false, then a running operator will not have privilege to manage a newly added namespace that matches its label selector until you upgrade the operator’s Helm release. See Ensuring the operator has permission to manage a namespace.
domainNamespaceRegExp

Specifies a regular expression that will be used when searching for namespaces that the operator will manage. The operator will only manage domains found in namespaces matching this regular expression. This value is required if domainNamespaceSelectionStrategy is RegExp and ignored otherwise.

NOTES:

  • The regular expression functionality included with Helm is restricted to linear time constructs and, in particular, does not support lookarounds. The operator, written in Java, supports these complicated expressions. If you need to use a complex regular expression, then either:
    • Set enableClusterRoleBinding to true.
      • When enableClusterRoleBinding is false and namespaces are determined by list or regular expression, then the Helm chart has to iterate all of the namespaces and determine which ones match.
      • If you set enableClusterRoleBinding to true when selecting namespaces by list or regular expression, then the Helm chart doesn’t need to do anything special per namespace.
    • Or, create the necessary RoleBindings outside of Helm.
  • If your operator Helm enableClusterRoleBinding configuration value is false, then a running operator will not have privilege to manage a newly added namespace that matches its regular expression until you upgrade the operator’s Helm release. See Ensuring the operator has permission to manage a namespace.
introspectorJobNameSuffix and externalServiceNameSuffix

Specify the suffixes that the operator uses to form the name of the Kubernetes job for the domain introspector, and the name of the external service for the WebLogic Administration Server, if the external service is enabled.

Defaults to -introspector and -ext, respectively. The values cannot be more than 25 and 10 characters, respectively.

Prior to the operator 3.1.0 release, the suffixes are hard-coded to -introspect-domain-job and -external. The defaults are shortened in newer releases to support longer names in the domain resource and WebLogic domain configurations, such as the domainUID, and WebLogic cluster and server names.

To work with Kubernetes limits to resource names, the resultant names for the domain introspector job and the external service should not be more than 63 characters. For more details, see Meet Kubernetes resource name restrictions.

clusterSizePaddingValidationEnabled

Specifies if the operator needs to reserve additional padding when validating the server service names to account for longer Managed Server names as a result of expanding a cluster’s size in WebLogic domain configurations.

Defaults to true.

If clusterSizePaddingValidationEnabed is set to true, two additional characters will be reserved if the configured cluster’s size is between one and nine, and one additional character will be reserved if the configured cluster’s size is between 10 and 99. No additional character is reserved if the configured cluster’s size is greater than 99.

istioLocalhostBindingsEnabled

Default for the domain resource domain.spec.configuration.istio.localhostBindingsEnabled setting.

For more information, see Configuring the domain resource in Istio Support.

Elastic Stack integration

The following settings are related to integrating the Elastic Stack with the operator pod.

For example usage, see the operator Elastic Stack (Elasticsearch, Logstash, and Kibana) integration sample.

elkIntegrationEnabled

Specifies whether or not Elastic Stack integration is enabled.

Defaults to false.

Example:

elkIntegrationEnabled:  true
logStashImage

Specifies the container image containing Logstash. This parameter is ignored if elkIntegrationEnabled is false.

Defaults to logstash:6.8.23.

Example:

logStashImage:  "docker.elastic.co/logstash/logstash:6.8.23"
elasticSearchHost

Specifies the hostname where Elasticsearch is running. This parameter is ignored if elkIntegrationEnabled is false.

Defaults to elasticsearch.default.svc.cluster.local.

Example:

elasticSearchHost: "elasticsearch2.default.svc.cluster.local"
elasticSearchPort

Specifies the port number where Elasticsearch is running. This parameter is ignored if elkIntegrationEnabled is false.

Defaults to 9200.

Example:

elasticSearchPort: 9201
elasticSearchProtocol

Specifies the protocol to use for communication with Elasticsearch. This parameter is ignored if elkIntegrationEnabled is false.

Defaults to http.

Example:

elasticSearchProtocol: https
createLogStashConfigMap

Specifies whether a ConfigMap named weblogic-operator-logstash-cm should be created during helm install. The ConfigMap contains the Logstash pipeline configuration file logstash.conf and the Logstash settings file logstash.yml for the Logstash container running in the operator pod. If set to true, then a ConfigMap will be created during helm install using the logstash.conf and logstash.yml files in the kubernetes/samples/charts/weblogic-operator directory. Set createLogStashConfigMap to false if the ConfigMap already exists in the operator’s namespace with the Logstash configuration files. This parameter is ignored if elkIntegrationEnabled is false.

Defaults to true.

Example:

createLogStashConfigMap:  false

REST interface configuration

The REST interface configuration options are advanced settings for configuring the operator’s external REST interface.

For usage information, see the operator REST Services.

enableRest

Determines whether the operator’s REST endpoint is enabled.

Beginning with operator version 4.0.5, the operator’s REST endpoint is disabled by default.

Defaults to false.

externalRestEnabled

Determines whether the operator’s REST interface will be exposed outside the Kubernetes cluster using a node port. This value is ignored if enableRest is not true.

See also externalRestHttpsPort for customizing the port number.

Defaults to false.

If set to true, you must provide the externalRestIdentitySecret property that contains the name of the Kubernetes Secret which contains the SSL certificate and private key for the operator’s external REST interface.

Example:

externalRestEnabled: true

NOTE: A node port is a security risk because the port may be publicly exposed to the internet in some environments. If you need external access to the REST port, then consider alternatives such as providing access through your load balancer, or using Kubernetes port forwarding.

externalRestHttpsPort

Specifies the node port that should be allocated for the external operator REST HTTPS interface.

Only used when externalRestEnabled is true, otherwise ignored.

Defaults to 31001.

Example:

externalRestHttpsPort: 32009

NOTE: A node port is a security risk because the port may be publicly exposed to the internet in some environments. If you need external access to the REST port, then consider alternatives such as providing access through your load balancer, or using Kubernetes port forwarding.

externalRestIdentitySecret

Specifies the user supplied secret that contains the SSL/TLS certificate and private key for the external operator REST HTTPS interface. The value must be the name of the Kubernetes tls secret previously created in the namespace where the operator is deployed. This parameter is required if externalRestEnabled is true, otherwise, it is ignored. To create the Kubernetes tls secret, you can use the following command:

$ kubectl create secret tls <secret-name> \
  -n <operator-namespace> \
  --cert=<path-to-certificate> \
  --key=<path-to-private-key>

There is no default value.

The Helm installation will produce an error, similar to the following, if externalRestIdentitySecret is not specified (left blank) and externalRestEnabled is true:

Error: render error in "weblogic-operator/templates/main.yaml": template: weblogic-operator/templates/main.yaml:9:3: executing "weblogic-operator/templates/main.yaml"
    at <include "operator.va...>: error calling include: template: weblogic-operator/templates/_validate-inputs.tpl:42:14: executing "operator.validateInputs"
    at <include "utils.endVa...>: error calling include: template: weblogic-operator/templates/_utils.tpl:22:6: executing "utils.endValidation"
    at <fail $scope.validati...>: error calling fail:
 string externalRestIdentitySecret must be specified

Example:

externalRestIdentitySecret: weblogic-operator-external-rest-identity
externalOperatorCert (Deprecated)

Use externalRestIdentitySecret instead

Specifies the user supplied certificate to use for the external operator REST HTTPS interface. The value must be a string containing a Base64 encoded PEM certificate. This parameter is required if externalRestEnabled is true, otherwise, it is ignored.

There is no default value.

The Helm installation will produce an error, similar to the following, if externalOperatorCert is not specified (left blank) and externalRestEnabled is true:

Error: render error in "weblogic-operator/templates/main.yaml": template: weblogic-operator/templates/main.yaml:4:3: executing "weblogic-operator/templates/main.yaml"
  at <include "operator.va...>: error calling include: template: weblogic-operator/templates/_validate-inputs.tpl:53:4: executing "operator.validateInputs"
  at <include "operator.re...>: error calling include: template: weblogic-operator/templates/_utils.tpl:137:6: executing "operator.reportValidationErrors"
  at <fail .validationErro...>: error calling fail: The string property externalOperatorCert must be specified.

Example:

externalOperatorCert: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUQwakNDQXJxZ0F3S ...
externalOperatorKey (Deprecated)

Use externalRestIdentitySecret instead

Specifies user supplied private key to use for the external operator REST HTTPS interface. The value must be a string containing a Base64 encoded PEM key. This parameter is required if externalRestEnabled is true, otherwise, it is ignored.

There is no default value.

The Helm installation will produce an error, similar to the following, if externalOperatorKey is not specified (left blank) and externalRestEnabled is true:

Error: render error in "weblogic-operator/templates/main.yaml": template: weblogic-operator/templates/main.yaml:4:3: executing "weblogic-operator/templates/main.yaml"
  at <include "operator.va...>: error calling include: template: weblogic-operator/templates/_validate-inputs.tpl:53:4: executing "operator.validateInputs"
  at <include "operator.re...>: error calling include: template: weblogic-operator/templates/_utils.tpl:137:6: executing "operator.reportValidationErrors"
  at <fail .validationErro...>: error calling fail: The string property externalOperatorKey must be specified.

Example:

externalOperatorKey: QmFnIEF0dHJpYnV0ZXMKICAgIGZyaWVuZGx5TmFtZTogd2VibG9naWMtb3B ...
tokenReviewAuthentication

If set to true, tokenReviewAuthentication specifies whether the the operator’s REST API should:

  • Use Kubernetes token review API for authenticating users.
  • Use Kubernetes subject access review API for authorizing a user’s operation (get, list, patch, and such) on a resource.
  • Update the domain resource using the operator’s privileges.

If set to false, the operator’s REST API will use the caller’s bearer token for any update to the domain resource so that it is done using the caller’s privileges.

Defaults to false.

Example:

tokenReviewAuthentication: true

Debugging options

javaLoggingLevel

Specifies the level of Java logging that should be enabled in the operator. Valid values are: SEVERE, WARNING, INFO, CONFIG, FINE, FINER, and FINEST.

Defaults to INFO.

Example:

javaLoggingLevel:  "FINE"

NOTE: Please consult Operator logging level before changing this setting.

remoteDebugNodePortEnabled

Specifies whether or not the operator will start a Java remote debug server on the provided port and suspend execution until a remote debugger has attached.

Defaults to false.

Example:

remoteDebugNodePortEnabled:  true
internalDebugHttpPort

Specifies the port number inside the Kubernetes cluster for the operator’s Java remote debug server.

This parameter is required if remoteDebugNodePortEnabled is true (default false). Otherwise, it is ignored.

Defaults to 30999.

Example:

internalDebugHttpPort:  30888
externalDebugHttpPort

Specifies the node port that should be allocated for the Kubernetes cluster for the operator’s Java remote debug server.

This parameter is required if remoteDebugNodePortEnabled is true. Otherwise, it is ignored.

Defaults to 30999.

Example:

externalDebugHttpPort:  30777

NOTE: A node port is a security risk because the port may be publicly exposed to the internet in some environments. If you need external access to the debug port, then consider using Kubernetes port forwarding instead.