Stretch support

- Support Debian Stretch (MariaDB debian/upstream + Galera)
- Doc updated
- New travis tests (with Vagrant)
- Drop support of mysql_innodb_additional_mem_pool_size
- Xtrabackup optionnal installation + package name updatable
- Fix many issues with replication (Ansible 2.3)
- Auto-retreive master IP address on tests
- MySQL tools per OS release

tasks/install/main.yml

@@ -35,9 +35,8 @@
 
 - name: APT | Install few MySQL related tools
   apt: pkg={{ item }} state=present install_recommends=no
-  with_items:
-    - mytop
-    - percona-toolkit
-    - percona-xtrabackup
-    - python-mysqldb
-    - mysqltuner
+  with_items: "{{ mysql_tools }}"
+
+- name: APT | Install percona-xtrabackup if needed
+  apt: pkg={{ mysql_xtrabackup_package }}
+  when: mysql_install_xtrabackup_package

tasks/install/mariadb/default.yml

@@ -19,4 +19,3 @@
 - name: APT | Install Galera
   apt: pkg=galera-3 state=present
   when: mysql_vendor == 'mariadb_galera'
-

tasks/install/mariadb/upstream.yml

@@ -1,7 +1,8 @@
 ---
 
 - name: APT | Install MariaDB key
-  apt_key: keyserver="keyserver.ubuntu.com" id="0xcbcb082a1bb943db" state=present
+  apt_key: keyserver="keyserver.ubuntu.com" id={{ item }} state=present
+  with_items: ['0xcbcb082a1bb943db', '0xf1656f24c74cd1d8']
 
 - name: APT | Add MariaDB repository
   apt_repository: repo='deb {{ mysql_mariadb_repository }} {{ ansible_distribution_release }} main' state=present
@@ -12,4 +13,3 @@
 
 - name: INCLUDE | Normal Install
   include: default.yml
-

tasks/main.yml

@@ -1,5 +1,8 @@
 ---
 
+- name: INCLUDE_VARS | Related to OS version
+  include_vars: "{{ ansible_distribution }}-{{ ansible_distribution_release }}.yml"
+
 - name: STAT | Check if mysql exists
   stat: path=/etc/init.d/mysql
   register: mysql_exists

tasks/replication/slave.yml

@@ -15,13 +15,17 @@
   ignore_errors: yes
   register: slave_status
 
+- name: INCLUDE | Transfert /etc/mysql/debian.cnf from master
+  include: slave/ssh.yml
+  when: mysql_slave_replicate_mysqldb or ((slave_status.failed is defined or not slave_status.Is_Slave) and mysql_slave_import_data)
+
 - name: INCLUDE | Import data
   include: slave/import_data.yml
-  when: slave_status.failed is defined and mysql_slave_import_data
+  when: (slave_status.failed is defined or not slave_status.Is_Slave) and mysql_slave_import_data
 
 - name: INCLUDE | Configure replication
   include: slave/replication.yml
-  when: slave_status.failed is defined or mysql_slave_force_setup
+  when: (slave_status.failed is defined or not slave_status.Is_Slave) or mysql_slave_force_setup
 
 - name: INCLUDE | Transfert /etc/mysql/debian.cnf from master
   include: slave/debiancnf.yml

tasks/replication/slave/import_data.yml

@@ -1,7 +1,6 @@
 ---
 
 # Doc: https://www.percona.com/doc/percona-xtrabackup/2.1/howtos/recipes_ibkx_gtid.html
-
 - name: WAIT_FOR | source data (prevent rsync bug) - TODO find another hack
   wait_for: host={{ mysql_slave_import_from }} port=22
 
@@ -26,14 +25,15 @@
 
 - name: SET_FACT | related to mysql datadir
   set_fact:
-    mysql_mysql_datadir: "{{ datadir.msg[0][1] }}"
-    mysql_binlog_info: "{{ datadir.msg[0][1] }}/xtrabackup_binlog_info"
+    mysql_mysql_datadir: "{{ datadir.msg }}"
+    mysql_binlog_info: "{{ datadir.msg }}/xtrabackup_binlog_info"
 
 - name: SERVICE | Stop MySQL before importing data
   service: name=mysql state=stopped
 
+# TODO: add an "ignore warning"
 - name: COMMAND | Sync backup to slave - TODO remove vagrant as static user (see why mysql_backup_user is not working)
-  shell: "sudo -E rsync --rsync-path='sudo rsync' -a -e 'ssh -o StrictHostKeyChecking=no' vagrant@{{ mysql_slave_import_from }}:{{ mysql_backup_dir }}/ {{ mysql_mysql_datadir }}/"
+  shell: "sudo -E rsync --rsync-path='sudo rsync' -a -e 'ssh -o StrictHostKeyChecking=no' {{ mysql_backup_user }}@{{ mysql_slave_import_from }}:{{ mysql_backup_dir }}/ {{ mysql_mysql_datadir }}/"
   become: no
 
 - name: FILE | Re-apply owner

tasks/replication/slave/replication.yml

@@ -20,4 +20,3 @@
 
 - name: MYSQL_REPLICATION | Start slave
   mysql_replication: mode=startslave
-

tasks/replication/slave/ssh.yml

@@ -0,0 +1,19 @@
+---
+
+- name: SHELL | Create SSH key if needed on slave
+  shell: "ssh-keygen -b 2048 -t rsa -f {{ ansible_env.HOME }}/.ssh/id_rsa -q -N ''"
+  args:
+    creates: "{{ ansible_env.HOME }}/.ssh/id_rsa"
+
+- name: COMMAND | Get pub key
+  command: cat {{ ansible_env.HOME }}/.ssh/id_rsa.pub
+  register: pub_key
+  changed_when: false
+
+- name: AUTHORIZED_KEY | Auth slave to backup host
+  authorized_key:
+    user: "{{ mysql_backup_user }}"
+    state: present
+    key: "{{ pub_key.stdout }}"
+  delegate_to: "{{ mysql_slave_import_from }}"
+  become: yes