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Managing WordPress with Ansible David Murphy, October 2015

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@schwuk http://schwuk.com David Murphy, October 2015

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David Murphy, October 2015

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opinionated David Murphy, October 2015

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more than one way to do it David Murphy, October 2015

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why bother with any of this? David Murphy, October 2015

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doing it yourself David Murphy, October 2015

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knowing how to do it yourself David Murphy, October 2015

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automation David Murphy, October 2015

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if you are going to do something more than once, automate it David Murphy, October 2015

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Choices David Murphy, October 2015

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Choice #1: Software David Murphy, October 2015

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David Murphy, October 2015

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Choice #2: Platform David Murphy, October 2015

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David Murphy, October 2015

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they are all good David Murphy, October 2015

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Choice #3: Hosting David Murphy, October 2015

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David Murphy, October 2015

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David Murphy, October 2015

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they are not all good David Murphy, October 2015

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Choice #4: Tool David Murphy, October 2015

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David Murphy, October 2015

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again, they are all good David Murphy, October 2015

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David Murphy, October 2015

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Ansible is a powerful automation tool that you can learn quickly. David Murphy, October 2015

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how does it work? David Murphy, October 2015

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inventory playbooks roles David Murphy, October 2015

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inventory playbooks roles David Murphy, October 2015

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Inventory David Murphy, October 2015

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Sample inventory [webservers] www1.example.com www2.example.com [dbservers] db0.example.com db1.example.com David Murphy, October 2015

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Naming patterns [webservers] www[01:50].example.com [databases] db-[a:f].example.com David Murphy, October 2015

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Groups-of-groups [web] host1 host2 [database] host2 host3 [site:children] web database David Murphy, October 2015

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Out-of-scope Dynamic inventory (e.g., Amazon EC2) David Murphy, October 2015

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Our inventory [development] my_vagrant_host ansible_sudo=yes [production] wcmcr.schwuk.com David Murphy, October 2015

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demo David Murphy, October 2015

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David Murphy, October 2015

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Playbooks David Murphy, October 2015

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Sample playbook --- - hosts: webservers remote_user: root tasks: - name: ensure apache is at the latest version yum: pkg=httpd state=latest - name: write the apache config file template: src=/srv/httpd.j2 dest=/etc/httpd.conf - hosts: databases remote_user: root tasks: - name: ensure postgresql is at the latest version yum: name=postgresql state=latest - name: ensure that postgresql is started service: name=postgresql state=running David Murphy, October 2015

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Modules David Murphy, October 2015

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yum Manages packages with the yum package manager1 - yum: pkg=httpd state=latest 1 http://docs.ansible.com/ansible/yum_module.html David Murphy, October 2015

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template Create/modify files using variables2 - template: src=/srv/httpd.j2 dest=/etc/httpd.conf 2 http://docs.ansible.com/ansible/template_module.html David Murphy, October 2015

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service Controls services on the remote host(s)3 - service: name=postgresql state=running 3 http://docs.ansible.com/ansible/service_module.html David Murphy, October 2015

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Modules, modules, modules → command, get_url → apt, apt_key, apt_repository → digital_ocean, linode, ec2, gce, docker → irc, slack, hipchat, mail → mysql_db, mysql_user → git, subversion David Murphy, October 2015

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But where are... → Apache/NGINX? → PHP? David Murphy, October 2015

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install → configure → control David Murphy, October 2015

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apt → template → service David Murphy, October 2015

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Deploying WordPress David Murphy, October 2015

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Famous 5-Minute Install4 → download/unzip → create database → edit config → upload 4 http://codex.wordpress.org/InstallingWordPress#Famous5-Minute_Install David Murphy, October 2015

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A better example → install packages → create database, then database user → download/unzip → edit config → configure webserver → ensure webserver is running David Murphy, October 2015

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First, some variables vars: db_name: wcmcr db_user: wcmcr db_password: correcthorsebatterystaple site_name: wcmcr.schwuk.com site_alias: wcmcr David Murphy, October 2015

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Install packages - name: Install mysql-server apt: name=mysql-server state=present↩ update_cache=yes cache_valid_time=3600 - name: Install apache2 apt: name=apache2 state=present - name: Install libapache2-mod-php5 apt: name=libapache2-mod-php5 state=present - name: Install php5-mysql apt: name=php5-mysql state=present - name: Install python-mysqldb apt: name=python-mysqldb state=present - name: Install python-httplib2 apt: name=python-httplib2 state=present David Murphy, October 2015

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Install packages take two - name: Install required packages apt: name: "{{ item }}" state: present update_cache: yes cache_valid_time: 3600 with_items: - mysql-server - apache2 - libapache2-mod-php5 - php5-mysql - python-mysqldb - python-httplib2 David Murphy, October 2015

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Database setup - name: Create WordPress database mysql_db: name: "{{ db_name }}" state: present - name: Create WordPress user mysql_user: name: "{{ db_user }}" password: "{{ db_password }}" priv: "{{ db_name }}.*:ALL" state: present David Murphy, October 2015

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Install WordPress - name: Create directory for WordPress file: path: /srv/{{ site_alias }} state: directory mode: 0755 - name: Get WordPress get_url: url: http://wordpress.org/latest.tar.gz dest: /tmp/wordpress.tar.gz - name: Extract WordPress unarchive: src: /tmp/wordpress.tar.gz dest: /srv/{{ site_alias }} copy: no David Murphy, October 2015

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Edit config - name: Generate Keys and Salts uri: url: https://api.wordpress.org/secret-key/1.1/salt/ dest: /srv/{{ site_alias }}/keys.php creates: /srv/{{ site_alias }}/keys.php - name: Configure WordPress template: src: wp-config.php dest: /srv/{{ site_alias }}/wordpress/wp-config.php owner: root group: root mode: 0644 David Murphy, October 2015

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wp-config.php template

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Configure webserver - name: Configure webserver template: src: apache-site.conf dest: /etc/apache2/sites-available/{{ site_alias }}.conf owner: root group: root mode: 0644 notify: - restart apache - name: Disable default site_alias command: a2dissite 000-default - name: Enable WordPress site command: a2ensite {{ site_alias }} David Murphy, October 2015

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Handlers handlers: - name: restart apache service: name=apache2 state=restarted David Murphy, October 2015

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demo David Murphy, October 2015

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David Murphy, October 2015

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David Murphy, October 2015

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Next steps David Murphy, October 2015

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Questions? David Murphy, October 2015