add robustness after testing site.yml

roles/keystone/scripts/initialize_db.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Start a mariadb container to use its mysql client to initialize the keystone database.
-docker run --rm -i mariadb:10.1.22 mysql -uroot -pgeheim --host "$1" << EOF
+docker run --rm -i mariadb:10.2 mysql -uroot -pgeheim --host "$1" << EOF
 CREATE DATABASE IF NOT EXISTS keystone;
 GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'localhost' IDENTIFIED BY 'keystone';
 GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'%' IDENTIFIED BY 'keystone';

roles/keystone/tasks/main.yml

@@ -27,6 +27,13 @@
 
 - name: Initialize db
   script: scripts/initialize_db.sh {{ hostvars[groups['databases'][0]]['ansible_default_ipv4']['address'] }}
+  register: result
+  until: result|succeeded
+  # sometimes the initial connect fails.
+  # Retry until it succeeds.
+  retries: 7
+  delay: 3
+  ignore_errors: yes
 
 - name: keystone manage commands to setup db
   command: >