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Chapter 7. Connect Red Hat build of Keycloak with an external Data Grid

This topic describes advanced Data Grid configurations for Red Hat build of Keycloak on Kubernetes.

7.1. Architecture

This connects Red Hat build of Keycloak to Data Grid using TCP connections secured by TLS 1.3. It uses the Red Hat build of Keycloak’s truststore to verify Data Grid’s server certificate. As Red Hat build of Keycloak is deployed using its Operator on OpenShift in the prerequisites listed below, the Operator already added the service-ca.crt to the truststore which is used to sign Data Grid’s server certificates. In other environments, add the necessary certificates to Red Hat build of Keycloak’s truststore.

7.2. Prerequisites

7.3. Procedure

  1. Create a Secret with the username and password to connect to the external Data Grid deployment: 

    apiVersion: v1
kind: Secret
metadata:
  name: remote-store-secret
  namespace: keycloak
type: Opaque
data:
  username: ZGV2ZWxvcGVy # base64 encoding for 'developer'
  password: c2VjdXJlX3Bhc3N3b3Jk # base64 encoding for 'secure_password'

  2. Extend the Red Hat build of Keycloak Custom Resource with additionalOptions as shown below.

    Note

    All the memory, resource and database configurations are skipped from the CR below as they have been described in Deploy Red Hat build of Keycloak for HA with the Red Hat build of Keycloak Operator chapter already. Administrators should leave those configurations untouched. 

    apiVersion: k8s.keycloak.org/v2alpha1
kind: Keycloak
metadata:
  labels:
    app: keycloak
  name: keycloak
  namespace: keycloak
spec:
  additionalOptions:
    - name: cache-remote-host 1
      value: "infinispan.keycloak.svc"
    - name: cache-remote-port 2
      value: "11222"
    - name: cache-remote-username 3
      secret:
        name: remote-store-secret
        key: username
    - name: cache-remote-password 4
      secret:
        name: remote-store-secret
        key: password
    - name: spi-connections-infinispan-quarkus-site-name 5
      value: keycloak
    1 1
    The hostname of the remote Data Grid cluster.
    2 2
    The port of the remote Data Grid cluster. This is optional and it default to 11222.
    3 3
    The Secret name and key with the Data Grid username credential.
    4
    The Secret name and key with the Data Grid password credential.
    5
    The spi-connections-infinispan-quarkus-site-name is an arbitrary Data Grid site name which Red Hat build of Keycloak needs for its Infinispan caches deployment when a remote store is used. This site-name is related only to the Infinispan caches and does not need to match any value from the external Data Grid deployment. If you are using multiple sites for Red Hat build of Keycloak in a cross-DC setup such as Deploy Data Grid for HA with the Data Grid Operator, the site name must be different in each site.

7.4. Relevant options

 Value

cache-remote-host

The hostname of the remote server for the remote store configuration.

It replaces the host attribute of remote-server tag of the configuration specified via XML file (see cache-config-file option.). If the option is specified, cache-remote-username and cache-remote-password are required as well and the related configuration in XML file should not be present.

CLI: --cache-remote-host
Env: KC_CACHE_REMOTE_HOST

 

cache-remote-password

The password for the authentication to the remote server for the remote store.

It replaces the password attribute of digest tag of the configuration specified via XML file (see cache-config-file option.). If the option is specified, cache-remote-host and cache-remote-username are required as well and the related configuration in XML file should not be present.

CLI: --cache-remote-password
Env: KC_CACHE_REMOTE_PASSWORD

 

cache-remote-port

The port of the remote server for the remote store configuration.

It replaces the port attribute of remote-server tag of the configuration specified via XML file (see cache-config-file option.).

CLI: --cache-remote-port
Env: KC_CACHE_REMOTE_PORT

11222 (default)

cache-remote-username

The username for the authentication to the remote server for the remote store.

It replaces the username attribute of digest tag of the configuration specified via XML file (see cache-config-file option.). If the option is specified, cache-remote-host and cache-remote-password are required as well and the related configuration in XML file should not be present.

CLI: --cache-remote-username
Env: KC_CACHE_REMOTE_USERNAME

 
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