From fdb5320429d278c9e6f497d5f14a76777c897ca9 Mon Sep 17 00:00:00 2001
From: Egon Rijpkema <git@egonrijpkema.nl>
Date: Tue, 17 Oct 2017 17:12:52 +0200
Subject: [PATCH] add galera.cnf for first node

---
 mariadb.yml                  |  7 +++++++
 roles/mariadb/tasks/main.yml | 14 ++++++++++++++
 test_hosts                   |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/mariadb.yml b/mariadb.yml
index 830e63d..2432187 100644
--- a/mariadb.yml
+++ b/mariadb.yml
@@ -4,3 +4,10 @@
   become: True
   roles:
       - mariadb
+  vars:
+      hostname_node0: "{{ hostvars[groups['mariadb'][0]]['ansible_hostname'] }}"
+      hostname_node1: "{{ hostvars[groups['mariadb'][1]]['ansible_hostname'] }}"
+      hostname_node2: "{{ hostvars[groups['mariadb'][2]]['ansible_hostname'] }}"
+      ip_node0: "hostvars[groups['databases'][0]]['listen_ip'] | default(hostvars[groups['databases'][0]]['ansible_default_ipv4']['address'])"
+      ip_node1: "hostvars[groups['databases'][1]]['listen_ip'] | default(hostvars[groups['databases'][1]]['ansible_default_ipv4']['address'])"
+      ip_node2: "hostvars[groups['databases'][2]]['listen_ip'] | default(hostvars[groups['databases'][2]]['ansible_default_ipv4']['address'])"
diff --git a/roles/mariadb/tasks/main.yml b/roles/mariadb/tasks/main.yml
index 002fdbb..d28b8a3 100644
--- a/roles/mariadb/tasks/main.yml
+++ b/roles/mariadb/tasks/main.yml
@@ -31,6 +31,20 @@
     dest: /srv/mariadb/etc/mysql
     mode: 660
 
+- name: Set galara.cnf on first node if we have at least three nodes.
+  copy:
+    src: files/galera-master.cnf
+    dest: /srv/mariadb/etc/mysql/conf.d/galera.cnf
+    mode: 660
+  when: ansible_nodename == hostname_node0 and hostvars[groups['mariadb']]|length >= 3
+
+- name: Set galara.cnf on other nodes if we have at least three nodes.
+  copy:
+    src: files/galera-slave.cnf
+    dest: /srv/mariadb/etc/mysql/conf.d/galera.cnf
+    mode: 660
+  when: ansible_nodename != hostname_node0 and hostvars[groups['mariadb']]|length >= 3
+
 - command: systemctl daemon-reload
 
 - name: make sure service is started
diff --git a/test_hosts b/test_hosts
index f6969ba..f7eeb58 100644
--- a/test_hosts
+++ b/test_hosts
@@ -1,5 +1,7 @@
 [databases]
+ansible-test
 ansible-test-2
+ansible-test-3
 
 [keystone]
 ansible-test-3