Hi,
I think that should also be extended to KEYCLOAK_ADMIN_FILE and KEYCLOAK_ADMIN_PASSWORD_FILE variables, example:

vars=($(set | grep -o -E "KC_.*_FILE|KEYCLOAK_ADMIN_FILE|KEYCLOAK_ADMIN_PASSWORD_FILE" || true))

In addition to that, I think exec /opt/keycloak/bin/kc.sh start "$@" should be exec /opt/keycloak/bin/kc.sh "$@" instead in order to not modify the default behavior (no args used)

Hi, I think that should also be extended to KEYCLOAK_ADMIN_FILE and KEYCLOAK_ADMIN_PASSWORD_FILE variables, example:

vars=($(set | grep -o -E "KC_.*_FILE|KEYCLOAK_ADMIN_FILE|KEYCLOAK_ADMIN_PASSWORD_FILE" || true))

Are those variables still supported? The config list at least does not contain them. If I've understood correctly, all configuration is meant to use the KC_ -prefix down the line.

In addition to that, I think exec /opt/keycloak/bin/kc.sh start "$@" should be exec /opt/keycloak/bin/kc.sh "$@" instead in order to not modify the default behavior (no args used)

Good point. Fixed.

Yes, they are supported:

• https://www.keycloak.org/getting-started/getting-started-docker
• https://www.keycloak.org/getting-started/getting-started-podman
• https://github.com/keycloak/keycloak-quickstarts/blob/latest/kubernetes-examples/keycloak.yaml
• https://www.keycloak.org/server/configuration
• https://github.com/keycloak/keycloak/blob/main/quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/integration/jaxrs/QuarkusKeycloakApplication.java#L40

I think you also need to exclude KC_CONFIG_FILE, for example:

vars=($(set | grep -o -E "KC_.*_FILE|KEYCLOAK_ADMIN_FILE|KEYCLOAK_ADMIN_PASSWORD_FILE" | grep -v KC_CONFIG_FILE || true))

Use case

mkdir -p secrets

cat > secrets/custom.conf <<EOF
db-username=keycloak
db-password=dadccf4d2s421zx
health-enabled=true
EOF

docker run --rm --name optimized_keycloak -p 127.0.0.1:8080:8080 -v $(pwd)/secrets:/secrets:ro \
-e KC_CONFIG_FILE=/secrets/custom.conf \
-e KC_METRICS_ENABLED=true \
prebuilt_keycloak start-dev

I'm sorry to close this PR, thanks again for the effort and time really appreciated ❤️
ref: #10816 (comment)