Galera install imrovements

- Do not force package ('galera-3' was hard coded)
- Prevent some crashes when galera is installed with mariadb at the same
time

defaults/main.yml

@@ -133,6 +133,8 @@ mariadb_galera_members: []
 mariadb_galera_primary_node: 'change_me'    # See: https://github.com/ansible/ansible/issues/17453
 mariadb_wsrep_stt_method: 'rsync'
 
+mariadb_galera_package_name: 'galera-4'
+
 # -------------------------------------
 # Debug
 # -------------------------------------

tasks/galera/main.yml

@@ -1,5 +1,9 @@
 ---
 
+- name: APT | Install Galera
+  apt:
+    pkg: "{{ mariadb_galera_package_name }}"
+
 - name: TEMPLATE | Deploy Galera configuration
   template:
     src: etc/mysql/mariadb.conf.d/20-galera.cnf.j2

tasks/install/mariadb/default.yml

@@ -3,8 +3,3 @@
 - name: APT | Install MariaDB server
   apt:
     pkg: mariadb-server
-
-- name: APT | Install Galera
-  apt:
-    pkg: galera-3
-  when: mariadb_use_galera