Move healthcheck to dockerfile

Signed-off-by: John Gomersall <thegoms@gmail.com>

Dockerfile

@@ -42,5 +42,7 @@ FROM quay.io/keycloak/keycloak:${KEYCLOAK_VERSION}
 
 COPY --from=keycloak_builder /opt/keycloak/ /opt/keycloak/
 
+HEALTHCHECK --start-period=60s --interval=1s CMD timeout 1s bash -c 'test -f /tmp/health && :> /dev/tcp/localhost/8080'
+
 ENTRYPOINT [ "sh", "/opt/keycloak/startup.sh" ]
 

docker-compose.yml

@@ -8,6 +8,3 @@ services:
       - KEYCLOAK_BASE_URL
       - KEYCLOAK_REALM_NAME
       - KC_SPI_EVENTS_LISTENER_REDIS_EVENT_LISTENER_REDIS_URL=redis://${REDIS_URL}/0
-    healthcheck:
-      test: timeout 10s bash -c ':> /dev/tcp/localhost/8080'
-      start_interval: 10s

runtime-scripts/after_startup.sh

@@ -21,6 +21,9 @@ function wait_for_keycloak() {
   echo "Keycloak is now up and running."
 }
 
+# Docker healthcheck waits for this file to appear and for port to be open
+rm -f /tmp/health
+
 # Waiting for Keycloak to start before proceeding with the configurations.
 wait_for_keycloak
 
@@ -33,3 +36,5 @@ echo "Calling configure_keycloak"
 /opt/keycloak/bin/kcadm.sh update realms/open-products-facts -f /opt/keycloak/realm_settings.json
 /opt/keycloak/bin/kcadm.sh update users/profile -f /opt/keycloak/users_profile.json -r open-products-facts
 echo "End of configure_keycloak"
+
+echo Healthy > /tmp/health