Cat mysql log in case we fail to start mysql service.

Author: Kami

tests/smoke_tests/monitors_test/mysql_test.py

@@ -48,7 +48,11 @@ def mysql_client():
     # see: https://serverfault.com/a/872576
     os.system("chown -R mysql:mysql /var/lib/mysql /var/run/mysqld")
 
-    os.system("service mysql start")
+    exit_code = os.system("service mysql start")
+
+    # On failure include service logs for ease of debugging
+    if exit_code != 0:
+        os.system("cat /var/log/mysql/mysql.log || true")
 
     os.system("mysql < /init.sql")