docker-compose-db-failover.yml

version: "2.2"

networks:
    keycloak:
        ipam:
            config:
            - subnet: 10.0.1.0/24

    db_replication:
        ipam:
            config:
            - subnet: 10.0.3.0/24
        
services:

    mariadb_bootstrap:
        build: db/mariadb
        image: keycloak_test_mariadb:${KEYCLOAK_VERSION:-latest}
        networks:
            - db_replication
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_INITDB_SKIP_TZINFO: foo
            MYSQL_DATABASE: keycloak
            MYSQL_USER: keycloak
            MYSQL_PASSWORD: keycloak
        entrypoint: docker-entrypoint-wsrep.sh
        command: --wsrep-new-cluster
            
    mariadb_1:
        build: db/mariadb
        image: keycloak_test_mariadb:${KEYCLOAK_VERSION:-latest}
        networks:
            - db_replication
            - keycloak
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_INITDB_SKIP_TZINFO: foo
        entrypoint: docker-entrypoint-wsrep.sh
        command: --wsrep_cluster_address=gcomm://${MARIADB_RUNNING_HOST:-mariadb_bootstrap}
        ports:
            - "3316:3306"

    mariadb_2:
        build: db/mariadb
        image: keycloak_test_mariadb:${KEYCLOAK_VERSION:-latest}
        networks:
            - db_replication
            - keycloak
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_INITDB_SKIP_TZINFO: foo
        entrypoint: docker-entrypoint-wsrep.sh
        command: --wsrep_cluster_address=gcomm://${MARIADB_RUNNING_HOST:-mariadb_bootstrap}
        ports:
            - "3326:3306"

    mariadb_3:
        build: db/mariadb
        image: keycloak_test_mariadb:${KEYCLOAK_VERSION:-latest}
        networks:
            - db_replication
            - keycloak
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_INITDB_SKIP_TZINFO: foo
        entrypoint: docker-entrypoint-wsrep.sh
        command: --wsrep_cluster_address=gcomm://${MARIADB_RUNNING_HOST:-mariadb_bootstrap}
        ports:
            - "3336:3306"


    keycloak:
        build: keycloak/target/docker
        image: keycloak_test_keycloak:${KEYCLOAK_VERSION:-latest}
        networks:
            - keycloak
        environment:
            MARIADB_HA_MODE: ${MARIADB_HA_MODE:-replication:}
            MARIADB_HOSTS: ${MARIADB_HOSTS:-mariadb_1:3306,mariadb_2:3306}
            MARIADB_OPTIONS: ${MARIADB_OPTIONS}
            MARIADB_DATABASE: keycloak
            MARIADB_USER: keycloak
            MARIADB_PASSWORD: keycloak
            KEYCLOAK_ADMIN_USER: admin
            KEYCLOAK_ADMIN_PASSWORD: admin
            # docker-compose syntax note: ${ENV_VAR:-<DEFAULT_VALUE>}
            JAVA_OPTS: ${KEYCLOAK_JVM_MEMORY:--Xms64m -Xmx2g -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m} -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true
            HTTP_MAX_CONNECTIONS: ${KEYCLOAK_HTTP_MAX_CONNECTIONS:-500}
            WORKER_IO_THREADS: ${KEYCLOAK_WORKER_IO_THREADS:-2}
            WORKER_TASK_MAX_THREADS: ${KEYCLOAK_WORKER_TASK_MAX_THREADS:-16}
            DS_MIN_POOL_SIZE: ${KEYCLOAK_DS_MIN_POOL_SIZE:-10}
            DS_MAX_POOL_SIZE: ${KEYCLOAK_DS_MAX_POOL_SIZE:-100}
            DS_POOL_PREFILL: "${KEYCLOAK_DS_POOL_PREFILL:-true}"
            DS_PS_CACHE_SIZE: ${KEYCLOAK_DS_PS_CACHE_SIZE:-100}
        ports:
            - "8080:8080"
            - "8443:8443"
            - "7989:7989"
            - "9990:9990"
            - "9999:9999"