better mysql healthcheck (#2459)

* better mysql healthcheck

Signed-off-by: Ramon Petgrave <[email protected]>

* increase retries, lower interval

Signed-off-by: Ramon Petgrave <[email protected]>

---------

Signed-off-by: Ramon Petgrave <[email protected]>

Author: ramonpetgrave64

docker-compose.yml

@@ -24,10 +24,11 @@ services:
       - MYSQL_PASSWORD=zaphod
     restart: always # keep the MySQL server running
     healthcheck:
-      test: ["CMD", "/etc/init.d/mysql", "status"]
-      interval: 30s
+      # better healthcheck for mysql. See https://github.com/docker-library/mysql/issues/930.
+      test: ["CMD", "mysqladmin", "-h", "localhost", "-u$MYSQL_USER",  "-p$MYSQL_ROOT_PASSWORD", "-s", "ping"]
+      interval: 10s
       timeout: 3s
-      retries: 5
+      retries: 15
       start_period: 90s
   redis-server:
     image: docker.io/redis:6.2