Fix #50: adapt pid file default path

Note: by default MDBF packages use a different path than official
distro's packages. IMO the behavior of distro is cleaner, so, make sure
that the directory exist in case we deploy MDBF packages.

Note2: the pid file option does not seem to be mandatory for systemd and
docker, so we might also decide to remove this option by default. But
for the moment it's probably cleaner/simpler to keep default options
deployed with packages.

tasks/setup_redhat.yml

@@ -38,6 +38,17 @@
     state: present
   when: mariadb_use_official_repo
 
+# the following is needed since MDBF packages server installation doesn't
+# create the run dir directory which should probably be fixed upstream.
+- name: Make sure run dir exist
+  ansible.builtin.file:
+    path: /run/mariadb
+    state: directory
+    owner: "{{ mariadb_user }}"
+    group: "{{ mariadb_user }}"
+    mode: 0755
+  when: mariadb_use_official_repo
+
 - name: Check if mariadb command exists
   ansible.builtin.stat:
     path: /usr/bin/mariadb

vars/RedHat.yml

@@ -4,7 +4,7 @@ mariadb_server_package: mariadb-server
 mariadb_server_package_mdbf: MariaDB-server
 mariadb_config_file: "/etc/my.cnf.d/mariadb-server.cnf"
 mariadb_data_dir: "/var/lib/mysql"
-mariadb_pid_file: "/run/mysqld.pid"
+mariadb_pid_file: "/run/mariadb/mysqld.pid"
 mariadb_unix_socket: "/var/lib/mysql/mysql.sock"
 mariadb_log_dir: "/var/log/mariadb"
 mariadb_log_error_file: "{{ mariadb_log_dir }}/error.log"