Dockerfile

ARG KC_VERSION
FROM quay.io/keycloak/keycloak:${KC_VERSION} AS builder

ENV KC_HEALTH_ENABLED=true
ENV KC_METRICS_ENABLED=true

ENV KC_DB=postgres

WORKDIR /opt/keycloak
ADD dist_keycloak/keycloak-theme-for-kc-22-to-25.jar /opt/keycloak/providers/geektr-cloud-theme.jar
RUN /opt/keycloak/bin/kc.sh build --features=docker

FROM quay.io/keycloak/keycloak:${KC_VERSION}
COPY --from=builder /opt/keycloak/ /opt/keycloak/

RUN <<EORUN
#!/bin/sh -e
cat >/opt/keycloak/healthcheck.java <<EOF
public class healthcheck {
    public static void main(String[] args) throws java.lang.Throwable {
        System.exit(java.net.HttpURLConnection.HTTP_OK == ((java.net.HttpURLConnection) new java.net.URL(
                "http://localhost:9000/health/live")
                .openConnection()).getResponseCode() ? 0 : 1);
    }
}
EOF
EORUN
HEALTHCHECK --interval=10s --timeout=3s --start-period=5s --retries=20 CMD ["java", "/opt/keycloak/healthcheck.java"]

# https://www.keycloak.org/docs/latest/upgrading/index.html#the-deprecated-auto-build-cli-option-was-removed
ENTRYPOINT ["/opt/keycloak/bin/kc.sh", "start", "--optimized"]