Initial release

netzwirt · Apr 13, 2016 · b42c44e · b42c44e
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diff --git a/README.md b/README.md
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+#galera-cluster
+
+##Features
+
+- Setup mariadb galera cluster. 
+- Bootstrap new master and slaves.
+- Install percona xtradb scripts and services. (@see https://github.com/olafz/percona-clustercheck)
+
+#Role Variables
+
+##Passwords
+
+Passwords have to be stored on local ansible machine.
+
+Set the path for the storage with `galera_password_lookup_dir`
+
+##Group vars
+
+`galera_server_package`: mariadb-server-10.1
+
+`galera_cluster_name`: galera
+
+`galera_bind_address`: 0.0.0.0
+
+`galera_manage_users`: True
+
+
+##Host vars
+
+
+Set `galera_bootstrap` to True on one node, this will be the initial master node.
+
+Set `galera_node_ip` for each host (@see example inventory)
+
+
+##Monitor cluster via http
+@see https://github.com/olafz/percona-clustercheck
+
+Set `galera_check_scripts` to True if you like to install the percona clustercheck scripts
+
+Set port for the xinetd service `galera_check_scripts_port`
+
+
+##Checkuser for haproxy
+
+Create a checkuser for HAproxy with no password:
+
+Enable `galera_haproxy_user`-> True.
+
+List all allowed hosts in `galera_haproxy_hosts`
+
+
+
+#Dependencies
+
+None
+
+#Example
+
+
+##Inventory
+
+    [galera]
+    aav.gluster01 galera_node_ip=10.100.2.91 
+    aav.gluster02 galera_node_ip=10.100.2.92 galera_bootstrap=1
+    aav.gluster03 galera_node_ip=10.100.2.93 
+
+##Playbook
+
+     - hosts: galera
+       become: true
+       roles:
+         - netzwirt.galera-cluster
+
+
+#License
+
+BSD
+
+#Author Information
+
+[netzwirt](https://github.com/netzwirt)
+
diff --git a/defaults/main.yml b/defaults/main.yml
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+---
+# defaults for netzwirt.galera-cluster
+
+galera_server_package: mariadb-server-10.1
+
+galera_cluster_name: galera
+
+galera_bootstrap: False
+
+galera_node_ip: 127.0.0.1
+
+galera_bind_address: 0.0.0.0
+
+galera_manage_users: True
+
+#galera_grant_hosts: []
+
+
+# THIS PATH MUST EXIST in some versions of ansible TO AVOID RACE CONDITIONS !!! 
+# @see https://github.com/ansible/ansible/issues/10784
+galera_password_lookup_dir: "{{ inventory_dir }}/storage/netzwirt.galera-cluster/{{ galera_cluster_name }}"
+
+
+# monitor cluster via http
+# @see https://github.com/olafz/percona-clustercheck
+galera_check_scripts: True
+galera_check_scripts_port: 9200
+
+
+# checkuser for haproxy
+galera_haproxy_user: True
+galera_haproxy_hosts: 
+- 127.0.0.1
+
+
diff --git a/handlers/main.yml b/handlers/main.yml
@@ -0,0 +1,20 @@
+---
+
+- name: restart mysql
+  service: name=mysql state=restarted
+
+- name: start mysql
+  service: name=mysql state=started
+
+- name: stop mysql
+  service: name=mysql state=stopped
+
+
+- name: restart xinetd
+  service: name=xinetd state=restarted
+
+- name: start xinetd
+  service: name=xinetd state=started
+
+- name: stop xinetd
+  service: name=xinetd state=stopped
diff --git a/meta/main.yml b/meta/main.yml
@@ -0,0 +1,26 @@
+---
+galaxy_info:
+  author: 'Reto Gassmann'
+  description: 'Install MariaDB galera-cluster'
+  license: BSD
+  min_ansible_version: '1.8'
+
+  platforms:
+  - name: Ubuntu
+    versions:
+    - trusty
+  - name: Debian
+    versions:
+    - jessie
+
+  categories:
+  - mysql
+  - clustering
+  - database
+  - mariadb
+  - galera
+
+dependencies: []
+
+allow_duplicates: yes 
+
diff --git a/tasks/main.yml b/tasks/main.yml
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+---
+
+- name: repository key
+  apt_key: 
+    keyserver: keyserver.ubuntu.com 
+    id: "0xcbcb082a1bb943db"
+
+
+- name: add apt repository
+  apt_repository: 
+    repo: "deb http://ftp.heanet.ie/mirrors/mariadb/repo/10.1/ubuntu {{ ansible_distribution_release }} main" 
+    state: present 
+    update_cache: yes
+
+
+- name: check bootstrapped
+  stat: 
+    path: /etc/mysql/galera_node_bootstrapped
+  register: galera_node_bootstrapped
+
+
+- name: preseed galera root password
+  shell: echo "{{ galera_server_package }} mysql-server/root_password password {{ galera_root_password }}" | debconf-set-selections ;
+         echo "{{ galera_server_package }} mysql-server/root_password_again password {{ galera_root_password }}" | debconf-set-selections
+    executable=/bin/bash
+  when: galera_node_bootstrapped.stat.exists == False
+
+
+- name: install required packages
+  apt:
+    pkg: "{{ item }}"
+    state: present
+    update_cache: yes
+    cache_valid_time: 3600
+  with_items:
+    - "{{ galera_server_package }}"
+    - galera-3
+    - rsync
+    - python-mysqldb
+
+
+- name: generate client config
+  template: 
+    src: my.cnf-root.j2
+    dest: /root/.my.cnf
+    owner: root 
+    group: root
+    mode: 0400
+
+
+- name: set mysql root password
+  mysql_user: 
+    name: root
+    password: "{{ galera_root_password }}"
+    host: "{{ item }}"
+    state: present
+    priv: "*.*:ALL,GRANT"
+  with_items:
+  - localhost
+  - "{{ inventory_hostname }}"
+  - "{{ ansible_fqdn }}"
+  - 127.0.0.1
+  - "::1"
+  - "{{ galera_haproxy_hosts }}"
+  when: galera_manage_users
+
+
+- name: set debian-sys-maint password
+  mysql_user: 
+    name: debian-sys-maint 
+    password: "{{ galera_sys_maint_password }}"
+    host: localhost
+    login_user: root
+    login_password: "{{ galera_root_password }}"
+    state: present 
+    priv: "*.*:ALL"
+  when: galera_manage_users
+
+
+- name: set clustercheck password
+  mysql_user: 
+    name: clustercheck
+    password: "{{ galera_clustercheck_password }}"
+    host: localhost
+    login_user: root
+    login_password: "{{ galera_root_password }}"
+    state: present 
+    priv: "*.*:PROCESS"
+  when: galera_manage_users and galera_bootstrap
+
+
+- name: set haproxy (control user) password
+  shell:
+    mysql -p{{ galera_root_password }} -uroot -e "USE mysql; INSERT IGNORE INTO user (Host,User) values ('{{ item }}','haproxy'); FLUSH PRIVILEGES;" 
+  when: galera_manage_users and galera_haproxy_user
+  with_items: "{{ galera_haproxy_hosts }}"
+
+
+- name: galera configuration file
+  template: 
+    src: cluster.cnf.j2 
+    dest: /etc/mysql/conf.d/cluster.cnf 
+    owner: root 
+    group: root 
+    mode: 0644
+  notify: restart mysql 
+
+
+- name: mariadb configuration file
+  template: 
+    src: my.cnf-default.j2 
+    dest: /etc/mysql/my.cnf 
+    owner: root 
+    group: root 
+    mode: 0644
+  notify: restart mysql 
+
+
+- name: debian configuration file
+  template: 
+    src: debian.cnf.j2 
+    dest: /etc/mysql/debian.cnf 
+    owner: root 
+    group: root 
+    mode: 0644
+  notify: restart mysql 
+
+# percona xtradb scripts
+# and services
+- name: install xinetd
+  apt:
+    pkg: xinetd
+    state: present
+    update_cache: yes
+    cache_valid_time: 3600
+  when: galera_check_scripts
+
+
+- name: clustercheck shellscript
+  template: 
+    src: scripts/clustercheck.j2
+    dest: /usr/local/bin/clustercheck
+    owner: root 
+    group: root 
+    mode: 0755
+  when: galera_check_scripts
+
+
+- name: mysqlchk xinetd
+  template: 
+    src: scripts/mysqlchk.j2
+    dest: /etc/xinetd.d/mysqlchk
+    owner: root 
+    group: root 
+    mode: 0644
+  when: galera_check_scripts
+  notify: restart xinetd 
+
+
+- name: add mysqlchk to /etc/services 
+  lineinfile: 
+    dest: /etc/services 
+    regexp: '^mysqlchk ' 
+    line: 'mysqlchk    {{ galera_check_scripts_port }}/tcp    # MySQL check' 
+    owner: root 
+    group: root 
+    mode: 0644
+  when: galera_check_scripts
+  notify: restart xinetd 
+
+
+# To bootstrap a new cluster you need to start the first 
+# mysqld server with the option --wsrep-new-cluster on the command line 
+- name: stop servers if not bootstrapped
+  service:
+    name: mysql
+    state: stopped
+  when: galera_node_bootstrapped.stat.exists == False
+
+
+- name: bootstrap new cluster master
+  shell: mysqld --wsrep-new-cluster &
+         sleep 3
+  when: galera_bootstrap and galera_node_bootstrapped.stat.exists == False
+
+
+- name: restart new cluster master
+  service:
+    name: mysql
+    state: restarted
+  when: galera_bootstrap and galera_node_bootstrapped.stat.exists == False
+
+
+- name: restart new added nodes
+  service:
+    name: mysql
+    state: restarted
+  when: not galera_bootstrap and galera_node_bootstrapped.stat.exists == False 
+
+
+- name: create bootstrap file
+  file: 
+    path: /etc/mysql/galera_node_bootstrapped
+    state: touch
+  when: galera_node_bootstrapped.stat.exists == False
+
+