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Version: 3.11

Install Keycloak

Inspect the prerequisites and the main steps to perform for installing Keycloak.

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The installation process below is given for a Kubernetes cluster. The steps that differ for an OpenShift cluster are indicated in the warnings blocks.

Prerequisites​

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Out team recommends a Keycloakx helm chart from the codecentric repository, but other repositories can be used as well (e.g. Bitnami). Before installing Keycloak, it is necessary to install a PostgreSQL database.

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It is also possible to install Keycloak using the cluster add-ons. For details, please refer to the Install via Add-Ons page.

PostgreSQL Installation​

To install PostgreSQL, follow the steps below:

  1. Check that a security namespace is created. If not, run the following command to create it:

    kubectl create namespace security
    warning

    On the OpenShift platform, apply the SecurityContextConstraints resource. Change the namespace in the users section if required.

    View: keycloak-scc.yaml
    allowHostDirVolumePlugin: false
    allowHostIPC: false
    allowHostNetwork: false
    allowHostPID: false
    allowHostPorts: false
    allowPrivilegeEscalation: true
    allowPrivilegedContainer: false
    allowedCapabilities: null
    apiVersion: security.openshift.io/v1
    allowedFlexVolumes: []
    defaultAddCapabilities: []
    fsGroup:
      type: MustRunAs
      ranges:
        - min: 999
          max: 65543
    groups: []
    kind: SecurityContextConstraints
    metadata:
      annotations:
        "helm.sh/hook": "pre-install"
      name: keycloak
    priority: 1
    readOnlyRootFilesystem: false
    requiredDropCapabilities:
      - KILL
      - MKNOD
      - SETUID
      - SETGID
    runAsUser:
      type: MustRunAsRange
      uidRangeMin: 1
      uidRangeMax: 65543
    seLinuxContext:
      type: MustRunAs
    supplementalGroups:
      type: RunAsAny
    users:
      - system:serviceaccount:security:keycloakx
    volumes:
      - configMap
      - downwardAPI
      - emptyDir
      - persistentVolumeClaim
      - projected
      - secret
    View: postgresql-keycloak-scc.yaml
    allowHostDirVolumePlugin: false
    allowHostIPC: false
    allowHostNetwork: false
    allowHostPID: false
    allowHostPorts: false
    allowPrivilegeEscalation: true
    allowPrivilegedContainer: false
    allowedCapabilities: null
    apiVersion: security.openshift.io/v1
    allowedFlexVolumes: []
    defaultAddCapabilities: []
    fsGroup:
      type: MustRunAs
      ranges:
        - min: 999
          max: 65543
    groups: []
    kind: SecurityContextConstraints
    metadata:
      annotations:
          "helm.sh/hook": "pre-install"
      name: postgresql-keycloak
    priority: 1
    readOnlyRootFilesystem: false
    requiredDropCapabilities:
    - KILL
    - MKNOD
    - SETUID
    - SETGID
    runAsUser:
      type: MustRunAsRange
      uidRangeMin: 1
      uidRangeMax: 65543
    seLinuxContext:
      type: MustRunAs
    supplementalGroups:
      type: RunAsAny
    users:
    - system:serviceaccount:security:default
    volumes:
    - configMap
    - downwardAPI
    - emptyDir
    - persistentVolumeClaim
    - projected
    - secret

  2. Create PostgreSQL admin secret:

    kubectl -n security create secret generic keycloak-postgresql \
    --from-literal=password=<postgresql_password> \
    --from-literal=postgres-password=<postgresql_postgres_password>

  3. Add a helm chart repository:

    helm repo add bitnami https://charts.bitnami.com/bitnami
    helm repo update

  4. Install PostgreSQL v15.2.0 using bitnami/postgresql Helm chart v12.1.15:

    info

    The PostgreSQL can be deployed in production ready mode. For example, it may include multiple replicas, persistent storage, autoscaling, and monitoring. For details, please refer to the official Chart documentation.

    helm install postgresql bitnami/postgresql \
    --version 12.1.15 \
    --values values.yaml \
    --namespace security

Check out the values.yaml file sample of the PostgreSQL customization:

View: values.yaml
# PostgreSQL read only replica parameters
readReplicas:
  # Number of PostgreSQL read only replicas
  replicaCount: 1

image:
  tag: 15.2.0-debian-11-r0

global:
  postgresql:
    auth:
      username: admin
      existingSecret: keycloak-postgresql
      database: keycloak

primary:
  persistence:
    enabled: true
    size: 3Gi

Keycloak Installation​

To install Keycloak, follow the steps below:

  1. Use security namespace from the PostgreSQL installation.

  2. Add a chart repository:

    helm repo add codecentric https://codecentric.github.io/helm-charts
    helm repo update

  3. Create Keycloak admin secret:

    kubectl -n security create secret generic keycloak-admin-creds \
    --from-literal=username=<keycloak_admin_username> \
    --from-literal=password=<keycloak_admin_password>

  4. Install Keycloak 20.0.3 using codecentric/keycloakx Helm chart:

    info

    Keycloak can be deployed in production ready mode. For example, it may include multiple replicas, autoscaling, and monitoring. For details, please refer to the official Chart documentation.

    helm install keycloakx codecentric/keycloakx \
    --version 2.3.0 \
    --values values.yaml \
    --namespace security

    Check out the values.yaml file sample of the Keycloak customization:

    View: values.yaml
    replicas: 1

    # Deploy the latest version
    image:
      tag: "24.0.4"

    # The following parameter is unrecommended to expose. Exposed health checks lead to an unnecessary attack vector.
    health:
      enabled: false
    # The following parameter is unrecommended to expose. Exposed metrics lead to an unnecessary attack vector.
    metrics:
      enabled: false

    command:
      - "/opt/keycloak/bin/kc.sh"
      - "--verbose"
      - "start"

    extraEnv: |
      - name: KC_HOSTNAME
        value: "keycloak.<ROOT_DOMAIN>"
      - name: KC_SPI_HOSTNAME_DEFAULT_ADMIN
        value: "keycloak.<ROOT_DOMAIN>"
      - name: KC_HTTP_ENABLED
        value: "true"
      - name: KC_HOSTNAME_STRICT
        value: "false"
      - name: KC_HOSTNAME_STRICT_HTTPS
        value: "false"
      - name: KC_SPI_EVENTS_LISTENER_JBOSS_LOGGING_SUCCESS_LEVEL
        value: "info"
      - name: KEYCLOAK_ADMIN
        valueFrom:
          secretKeyRef:
            name: keycloak-admin-creds
            key: username
      - name: KEYCLOAK_ADMIN_PASSWORD
        valueFrom:
          secretKeyRef:
            name: keycloak-admin-creds
            key: password
      - name: JAVA_OPTS_APPEND
        value: >-
          -XX:+UseContainerSupport
          -XX:MaxRAMPercentage=50.0
          -Djava.awt.headless=true
          -Djgroups.dns.query={{ include "keycloak.fullname" . }}-headless
          -Dkeycloak.connectionsHttpClient.default.expect-continue-enabled=true
          -Dkeycloak.connectionsHttpClient.default.reuse-connections=false
      - name: HTTP_ADDRESS_FORWARDING
        value: "true"
      - name: PROXY_ADDRESS_FORWARDING
        value: "true"

    # This block should be uncommented if you install Keycloak on Kubernetes
    ingress:
      enabled: true
      annotations:
        nginx.ingress.kubernetes.io/proxy-buffer-size: 256k
      # Defines the class of the Ingress Controller.
      # It allows you to choose which Ingress controller in cluster should be used to expose the Keycloak service to the outside world.
      ingressClassName: "nginx"
      # Exposes Keycloak paths according to the rules from documentation.
      # Ref: https://www.keycloak.org/server/reverseproxy#_exposed_path_recommendations
      console:
        enabled: false
      rules:
        - host: keycloak.<ROOT_DOMAIN>
          paths:
            - path: '{{ tpl .Values.http.relativePath $ | trimSuffix "/" }}/'
              pathType: Prefix

    proxy:
      enabled: true
      mode: "edge"

    # This block should be uncommented if you set Keycloak to OpenShift and change the host field
    # route:
    #   enabled: false
    #   # Path for the Route
    #   path: '/'
    #   # Host name for the Route
    #   host: "keycloak.<ROOT_DOMAIN>"
    #   # TLS configuration
    #   tls:
    #     enabled: true

    resources:
      limits:
        memory: "2048Mi"
      requests:
        cpu: "50m"
        memory: "512Mi"

    # Check database readiness at startup
    dbchecker:
      enabled: true

    database:
      vendor: postgres
      existingSecret: keycloak-postgresql
      hostname: postgresql
      port: 5432
      username: admin
      database: keycloak

Configuration​

For configuring Keycloak within your environment, it's recommended to utilize the edp-keycloak-operator. This operator simplifies the integration process by automating the deployment and management of Keycloak instances. It ensures that Keycloak is correctly configured to serve as an identity provider, facilitating secure access management across your applications.

By leveraging the edp-keycloak-operator, you can efficiently manage realms, users, and client configurations, making it an essential tool for robust access control in Kubernetes environments.

To create a Keycloak user in the Master realm who can manage other realms, follow these steps:

  1. Create the edp_<EDP_PROJECT> user and set the password in the Master realm.

    note

    This user should be used by Keycloak Operator to access Keycloak. Please refer to the Install KubeRocketCI page for details.

  2. In the Role Mapping tab, assign the proper roles to the user:

    • Realm Roles:

      • create-realm,
      • offline_access,
      • uma_authorization

    • Client Roles openshift-realm:

      • impersonation,
      • manage-authorization,
      • manage-clients,
      • manage-users

    Role mappings

    note

    openshift-realm is the realm name used as the broker realm, which is utilized for integrating third-party Identity Providers. You can find more information about this integration in the kuberocketci-rbac repository of the KubeRocketCI platform.

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