Full buster optim (#38)

* Remove Stretch and Percona support
* Delete root password management (On Buster, it uses socket auth)
* Fix sync backups files master -> slave
* Cleanup legacy code on replication slave
* Use modern configuration
* Debian buster configuration style
* Drop logrotate management (useless)
* Add new default values in defaults/main.yml (according with MariaDB doc)
* Travis with Ansible 2.8+
* Drop feature "don't replicate mysql database"
* Fully compatible with python3

tasks/install/main.yml

@@ -1,9 +1,5 @@
 ---
 
-- name: INCLUDE | Setup Percona repository
-  import_tasks: 'percona/apt.yml'
-  when: mariadb_use_percona_apt | bool
-
 - name: INCLUDE | Setup MariaDB repository
   import_tasks: 'mariadb/upstream.yml'
   when: mariadb_origin == 'upstream'
@@ -15,8 +11,3 @@
   apt:
     pkg: "{{ mariadb_tools }}"
     install_recommends: no
-
-- name: APT | Install percona-xtrabackup if needed
-  apt:
-    pkg: "{{ mariadb_xtrabackup_package }}"
-  when: mariadb_install_xtrabackup_package | bool

tasks/install/mariadb/default.yml

@@ -1,26 +1,5 @@
 ---
 
-- name: SHELL | Get MariaDB target version
-  shell: "LANG=C apt-cache depends mariadb-server | awk -F '-' '/Depends/ { print $NF }'"
-  register: apt_mariadb_version
-  changed_when: false
-
-- name: DEBCONF | Prepare MariaDB silent installation (root password)
-  debconf:
-    name: 'mariadb-server-{{ apt_mariadb_version.stdout }}'
-    question: 'mysql-server/root_password'
-    vtype: 'password'
-    value: '{{ mariadb_root_password }}'
-  when: not mariadb_exists.stat.exists
-
-- name: DEBCONF | Prepare MariaDB silent installation (root password again)
-  debconf:
-    name: 'mariadb-server-{{ apt_mariadb_version.stdout }}'
-    question: 'mysql-server/root_password_again'
-    vtype: 'password'
-    value: '{{ mariadb_root_password }}'
-  when: not mariadb_exists.stat.exists
-
 - name: APT | Install MariaDB server
   apt:
     pkg: mariadb-server

tasks/install/percona/apt.yml

@@ -1,16 +0,0 @@
----
-
-- name: APT | Install Percona repository
-  apt:
-    deb: https://repo.percona.com/apt/percona-release_latest.generic_all.deb
-
-- name: COMMAND | Enable percona tools repository
-  command: percona-release enable tools release
-  args:
-    creates: /etc/apt/sources.list.d/percona-tools-release.list
-  register: p
-
-- name: APT | Update cache
-  apt:
-    update_cache: yes
-  when: p.changed