docker-compose.yml

version: "2.2"

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

services:

    mariadb:
        build: 
            context: db/mariadb
            args:
                MAX_CONNECTIONS: ${DB_MAX_CONNECTIONS:-100}
        image: keycloak_test_mariadb:${KEYCLOAK_VERSION:-latest}
        cpuset: ${DB_CPUSET:-1}
        mem_limit: ${DB_MEMLIMIT:-2g}
        networks:
            - keycloak
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_DATABASE: keycloak
            MYSQL_USER: keycloak
            MYSQL_PASSWORD: keycloak
            MYSQL_INITDB_SKIP_TZINFO: 1
        ports:
            - "3306:3306"

    keycloak:
        build: keycloak
        image: keycloak_test_keycloak:${KEYCLOAK_VERSION:-latest}
        depends_on:
            mariadb:
                condition: service_healthy
        cpuset: ${KEYCLOAK_CPUSET:-2-3}
        mem_limit: ${KEYCLOAK_MEMLIMIT:-2500m}
        networks:
            - keycloak
        environment:
            MARIADB_HOSTS: mariadb:3306
            MARIADB_DATABASE: keycloak
            MARIADB_USER: keycloak
            MARIADB_PASSWORD: keycloak
            KEYCLOAK_ADMIN_USER: ${KEYCLOAK_ADMIN_USER:-admin}
            KEYCLOAK_ADMIN_PASSWORD: ${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:-50000}
            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"
            - "9990:9990"