[feat] Add salt module to check if mysql is accepting db connections

salt/_modules/mysql.py

@@ -0,0 +1,35 @@
+#!py
+
+from MySQLdb import _mysql
+import logging
+import time
+
+log = logging.getLogger(__name__)
+
+
+def status(retry):
+    mainint = __salt__['pillar.get']('sensor:mainint', __salt__['pillar.get']('manager:mainint'))
+    mainip = __salt__['grains.get']('ip_interfaces').get(mainint)[0]
+    
+    mysql_up = False
+    for i in range(0, retry):
+        log.debug(f'Connection attempt {i+1}')
+        try:
+            _mysql.connect(
+                host=mainip,
+                user="root",
+                passwd=__salt__['pillar.get']('secrets:mysql')
+            )
+            mysql_up = True
+            break
+        except _mysql.OperationalError as e:
+            log.debug(e)
+        except Exception as e:
+            log.error(e)
+            break
+        time.sleep(1)
+    
+    if not mysql_up:
+        log.error(f'Could not connect to MySQL server on {mainip} after {retry} attempts.')
+
+    return mysql_up

salt/mysql/init.sls

@@ -97,6 +97,11 @@ so-mysql:
     - timeout: 900
     - onchanges:
       - docker_container: so-mysql
+  module.run:
+    - mysql.status:
+      - retry: 900
+    - onchanges:
+      - cmd: so-mysql
 {% endif %}
 
 {% else %}