Keycloak Docker container does not connect to MySQL database

Question

I am trying to set up a Keycloak server inside a Docker container, and I wish it to utilize a MySQL database stored on the host machine, but I want this database to be managed by a MySQL instance that is also running inside a Docker container. I cannot get this to work, however.

Thus far I have tried the following:

# Create network for keycloak
docker network create edci-network

# First start up MySQL server…
docker run \
    --name edci-keycloak-mysql \
    -d \
    --net edci-network \
    -e MYSQL_DATABASE=edci-keycloak \
    -e MYSQL_USER=edci-keycloak \
    -e MYSQL_PASSWORD=password \
    -v /path/to/local/database:/var/lib/mysql \
    -e MYSQL_ROOT_PASSWORD=root_password \
    mysql

# … then run Keycloak with token exchange enabled.
docker run \
    --name edci-keycloak \
    -d \
    -p 9000:8080 \
    --net edci-network \
    -e KEYCLOAK_USER=admin \
    -e KEYCLOAK_PASSWORD=admin \
    -e DB_ADDR=edci-keycloak-mysql \
    -e DB_PASSWORD=password \
    -e JAVA_OPTS_APPEND="
        -Dkeycloak.profile.feature.token_exchange=enabled
        -Dkeycloak.profile.feature.admin_fine_grained_authz=enabled
    " \
    quay.io/keycloak/keycloak:15.0.2

However, the Keycloak logs proclaim

Using H2 database

as the server starts up. What am I doing wrong here? The MySQL Example on the Keycloak Docker Hub page does not work as is either.

Note that using Docker Compose is not an option , so answers relying on it are not considered. Thanks for any assistance.

---

Keycloak container logs: https://pastebin.com/b56cmxBJ .

Answer 1

You are not using predefined values (eg Keycloak container expect DB name keycloak ), so you need to configure all DB details (env variables DB_* ) explicitly:

# Create network for keycloak
docker network create edci-network

# First start up MySQL server…
docker run \
    --name edci-keycloak-mysql \
    -d \
    --net edci-network \
    -e MYSQL_DATABASE=edci-keycloak \
    -e MYSQL_USER=edci-keycloak \
    -e MYSQL_PASSWORD=password \
    -v /path/to/local/database:/var/lib/mysql \
    -e MYSQL_ROOT_PASSWORD=root_password \
    mysql

# … then run Keycloak with token exchange enabled.
docker run \
    --name edci-keycloak \
    -d \
    -p 9000:8080 \
    --net edci-network \
    -e KEYCLOAK_USER=admin \
    -e KEYCLOAK_PASSWORD=admin \
    -e DB_VENDOR=mysql \
    -e DB_ADDR=edci-keycloak-mysql \
    -e DB_DATABASE=edci-keycloak \
    -e DB_USER=edci-keycloak \
    -e DB_PASSWORD=password \
    -e JAVA_OPTS_APPEND="
        -Dkeycloak.profile.feature.token_exchange=enabled
        -Dkeycloak.profile.feature.admin_fine_grained_authz=enabled
    " \
    quay.io/keycloak/keycloak:15.0.2