mariadb healthcheck

compose.mariadb.yml

@@ -31,6 +31,12 @@ services:
           backupbot.backup.pre-hook: 'mkdir -p /tmp/backup/ && mysqldump --single-transaction -u root -p"$$(cat /run/secrets/db_root_password)" nextcloud > /tmp/backup/backup.sql'
           backupbot.backup.post-hook: "rm -rf /tmp/backup"
           backupbot.backup.path: "/tmp/backup/"
+    healthcheck:
+      test: ["CMD-SHELL", 'mysqladmin -p"$$(cat /run/secrets/db_root_password)"  ping']
+      interval: 30s
+      timeout: 10s
+      retries: 10
+      start_period: 1m
 configs:
   my_tune:
     name: ${STACK_NAME}_my_cnf_${MY_CNF_VERSION}