Chapter 2. Basic Red Hat build of Keycloak deployment

Once the Red Hat build of Keycloak Operator is installed and running in the cluster namespace, you can set up the other deployment prerequisites.

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgresql-db
spec:
  serviceName: postgresql-db-service
  selector:
    matchLabels:
      app: postgresql-db
  replicas: 1
  template:
    metadata:
      labels:
        app: postgresql-db
    spec:
      containers:
        - name: postgresql-db
          image: postgres:latest
          volumeMounts:
            - mountPath: /data
              name: cache-volume
          env:
            - name: POSTGRES_PASSWORD
              value: testpassword
            - name: PGDATA
              value: /data/pgdata
            - name: POSTGRES_DB
              value: keycloak
      volumes:
        - name: cache-volume
          emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
  name: postgres-db
spec:
  selector:
    app: postgresql-db
  type: LoadBalancer
  ports:
  - port: 5432
    targetPort: 5432

oc apply -f example-postgres.yaml

openssl req -subj '/CN=test.keycloak.org/O=Test Keycloak./C=US' -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out certificate.pem

oc create secret tls example-tls-secret --cert certificate.pem --key key.pem

To deploy Red Hat build of Keycloak, you create a Custom Resource (CR) based on the Keycloak Custom Resource Definition (CRD).

Consider storing the Database credentials in a separate Secret. Enter the following commands:

oc create secret generic keycloak-db-secret \
  --from-literal=username=[your_database_username] \
  --from-literal=password=[your_database_password]

You can customize several fields using the Keycloak CRD. For a basic deployment, you can stick to the following approach:

Create YAML file example-kc.yaml:

apiVersion: k8s.keycloak.org/v2alpha1
kind: Keycloak
metadata:
  name: example-kc
spec:
  instances: 1
  db:
    vendor: postgres
    host: postgres-db
    usernameSecret:
      name: keycloak-db-secret
      key: username
    passwordSecret:
      name: keycloak-db-secret
      key: password
  http:
    tlsSecret: example-tls-secret
  hostname:
    hostname: test.keycloak.org

Apply the changes:

oc apply -f example-kc.yaml

To check that the Red Hat build of Keycloak instance has been provisioned in the cluster, check the status of the created CR by entering the following command:

oc get keycloaks/example-kc -o go-template='{{range .status.conditions}}CONDITION: {{.type}}{{"\n"}}  STATUS: {{.status}}{{"\n"}}  MESSAGE: {{.message}}{{"\n"}}{{end}}'

When the deployment is ready, look for output similar to the following:

CONDITION: Ready
  STATUS: true
  MESSAGE:
CONDITION: HasErrors
  STATUS: false
  MESSAGE:
CONDITION: RollingUpdate
  STATUS: false
  MESSAGE:

The Red Hat build of Keycloak deployment is exposed through a basic Ingress and is accessible through the provided hostname. On installations with multiple default IngressClass instances or when running on OpenShift 4.12+ you should provide an ingressClassName by setting ingress spec with className property to the desired class name:

Edit YAML file example-kc.yaml:

apiVersion: k8s.keycloak.org/v2alpha1
kind: Keycloak
metadata:
  name: example-kc
spec:
    ...
    ingress:
      className: openshift-default

If the default ingress does not fit your use case, disable it by setting ingress spec with enabled property to false value:

Edit YAML file example-kc.yaml:

apiVersion: k8s.keycloak.org/v2alpha1
kind: Keycloak
metadata:
  name: example-kc
spec:
    ...
    ingress:
      enabled: false

Apply the changes:

oc apply -f example-kc.yaml

You can provide an alternative ingress resource pointing to the service <keycloak-cr-name>-service.

For debugging and development purposes, consider directly connecting to the Red Hat build of Keycloak service using a port forward. For example, enter this command:

oc port-forward service/example-kc-service 8443:8443

When deploying Red Hat build of Keycloak, the operator generates an arbitrary initial admin username and password and stores those credentials as a basic-auth Secret object in the same namespace as the CR.

To fetch the initial admin credentials, you have to read and decode the Secret. The Secret name is derived from the Keycloak CR name plus the fixed suffix -initial-admin. To get the username and password for the example-kc CR, enter the following commands:

oc get secret example-kc-initial-admin -o jsonpath='{.data.username}' | base64 --decode
oc get secret example-kc-initial-admin -o jsonpath='{.data.password}' | base64 --decode

You can use those credentials to access the Admin Console or the Admin REST API.