[mariadb] Avoid using deprecated isAlive

The method was deprecated and later dropped, switch to is_alive()

Co-Authored-By: dbiletskiy <dbiletskiy@mirantis.com>

Change-Id: Ie259d0e59c68c9884e85025b1e44bcd347f45eff

mariadb/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v10.6.7
 description: OpenStack-Helm MariaDB
 name: mariadb
-version: 0.2.60
+version: 0.2.61
 home: https://mariadb.com/kb/en/
 icon: http://badges.mariadb.org/mariadb-badge-180x60.png
 sources:

mariadb/templates/bin/_start.py.tpl

@@ -784,7 +784,7 @@ monitor_cluster_thread.daemon = True
 
 def launch_cluster_monitor():
     """Launch grastate configmap updating thread"""
-    if not monitor_cluster_thread.isAlive():
+    if not monitor_cluster_thread.is_alive():
         monitor_cluster_thread.start()
 
 
@@ -808,7 +808,7 @@ leader_election_thread.daemon = True
 
 def launch_leader_election():
     """Launch leader election thread"""
-    if not leader_election_thread.isAlive():
+    if not leader_election_thread.is_alive():
         leader_election_thread.start()
 
 

releasenotes/notes/mariadb.yaml

@@ -76,4 +76,5 @@ mariadb:
   - 0.2.58 Prevent TypeError in get_active_endpoint function
   - 0.2.59 Give more time on resolving configmap update conflicts
   - 0.2.60 Refactor liveness/readiness probes
+  - 0.2.61 Avoid using deprecated isAlive()
 ...