Deploy Silverstripe with Ansible

Talk on the Silverstripe Conference 2015 in London. www.stripecon.eu

Transcript

1. Deploy Silverstripe with Ansible And setup a server for free ©Kraft/www.hallstatt.net
2. About me • Werner M. Krauß • Located in Hallstatt, Austria • wmk on IRC / github / stackoverflow • PHP since 1998 • Freelancer since 2006 (netwerkstatt) • SilverStripe since 2009
3. Overview • What is this thing called ansible? • What is debops? • What is deployment? • How can we put this things together and deploy a SilverStripe site with it?
4. WHAT IS ANSIBLE?
5. What is Ansible • IT automation tool • Based on python • Free, open source • Agentless, over ssh • Batteries included (comes with many useful modules)
6. BREAKING NEWS:
7. Ansible is indempotent • Produces the same results if executed multiple times • Declarative tasks define the wanted state
8. Ansible scales down • Of course you can manage tons of servers • Configuring a single node is also easy • "Simple things should be simple, complex things should be possbile" (Alan Kay)
9. Requirements • Control Machine: – Python 2.6 or 2.7 – gcc (for installing some python packages) – Linux, OSX, any BSD…. – Windows isn‘t supported • Managed Node: – SSH – Python 2.4 or later
10. Installation • Python 2.7, gcc on the management machine • Install requirements: sudo pip install paramiko PyYAML Jinja2 httplib2 six • sudo pip install ansible
11. Ansible Architecture Management Node Hosts Inventory Playbook Server 1 Server 2 Server n ssh
12. Inventory • INI format of your hosts • Group hosts • Subgroups are possible
13. Example Inventory [digitalocean] demo ansible_ssh_host=demo.silverstrip.es ansible_ssh_user=root mysite ansible_ssh_host=123.45.67.89 [webservers] demo www[01:50].example.com [mysql] db-[a:f].example.com
14. Ad-hoc commands • ansible <host-pattern> [options] –ansible all -m ping –ansible all -a "free m" –ansible webservers -m apt -a "name=tree state=latest" ansible module shell command
15. Concepts • Playbook • Plays • Tasks and handlers • Modules • Variables
16. Concepts #2 Playbook Play Host Task Module
17. Playbooks • Infrastructure as code • yml files • We SilverStripers love yml • pre_tasks, tasks, post_tasks and handlers
18. Variables • Playbooks • Inventory (group vars, host vars) • Command line • Discovered vars (aka facts) • Of course defaults in a role
19. Roles • reusable components • ~3.500 ready-to-use roles on ansible galaxy • create your own role: ansible-galaxy init <name> like SilverStripe modules
20. Ansible vault • For saving sensible data encrypted – passwords – keys etc… • Vault files can be distributed or placed in vcs
21. WHAT IS THIS "DEBOPS"? Source: torkildr/flickr, CC BY-SA 2.0
22. What is debops? • Your Debian-based data center in a box • Collection of Ansible playbooks • Scalable • 80+ highly extensible roles • Some custom scripts • Since October 2013 • Small but very helpful community
23. debops #2 • debops.org • IRC: freenode, #debops
24. Installing debops • sudo pip install debops • Create your DebOps project: debops-init /path/to/myproject • Download playbooks and roles: debops-update
25. WHAT IS DEPLOYMENT?
26. What is deployment? Deployment is a word, often used by the military, for sending troops into duty. A soldier could be part of a deployment to the Middle East. Deployment refers to assigning people to serve in various locations, especially soldiers and other military personnel. www.vocabulary.com/dictionary/deployment
27. What is deployment? #2 In its IT context, deployment encompasses all the processes involved in getting new software or hardware up and running properly in its environment, including installation, configuration, running, testing, and making necessary changes. whatis.techtarget.com/definition/deploy
28. Or as formula Deployment = Provisioning + Configuration
29. Deploying SilverStripe • Check if all required packages are installed – nginx, mysql, memcache etc… • Set up a virtual host • Create needed directories • Create database • Create _ss_environment.php or mariaDB
30. Deploying Silverstripe #2 • Copy files (checkout from git) • Install composer packages • Import database and assets • Run dev/build • Optional: setup cron tasks • …and anything you need for a happy site
31. Basic server setup • Depops bootstrap • Setup ssh key on the machine • Add host to the webserver, php (and db) groups in inventory • Configure group vars
32. Example group vars --- ntp_timezone: 'Europe/Berlin' postfix_relayhost: 'smtp.mydomain.com' postfix_default_local_alias_recipients: ['me@mydomain.com'] console_root: false #don't manage root account now... console_locales: ['de_DE.UTF-8', 'de_AT.UTF-8', ] important for localised dates
33. Run first setup • debops bootstrap -k -u root -l demo wrapper for ansible-playbook ask for password limit hosts playbook for basic server setup
35. Install packages • Add the host to special groups in inventory to install: – mySQL – nginx – PHP
36. Inventory/hosts [debops_nginx] demo [debops_php5] demo [debops_mysql] demo [debops_phpmyadmin] demo
37. Run debops again • debops -l demo – downloads and installs a lot • e.g. mysql role also installs automysqlbackup – takes some time….
39. Result:
40. MORE TASKS TO GET OUR SITE RUNNING Source: artgirl from Canada, CC BY-SA 2.0
41. Create project user - name: create project user user: name: '{{ silverstripe_user }}' group: '{{ silverstripe_group }}' comment: 'project user for {{ silverstripe_project }}' home : '{{ silverstripe_user_home}}' state: present append: True system: True some variables defined before
42. Configure PHP - role: debops.php5 php5_packages: - php5-memcached - php5-memcache - php5-gd - php5-curl - php5-mcrypt php5_pools: ['{{ silverstripe_php5_pool }}']
43. Install composer Command line: ansible-galaxy install loranger.debian-composer Playbook: - role: loranger.debian-composer downloads the role installs composer and keeps it updated when you run the playbook
44. Configure nginx • Basically role configuration • Sets up redirect from e.g. from example.com to www.example.com • Setup virtual host and configure it for SilverStripe
45. - role: debops.nginx nginx_upstreams: ['{{ nginx_upstream }}'] nginx_servers: - name: '{{ silverstripe_domains }}' enabled: True redirect_from: True root: '{{ silverstripe_path_wwwroot }}' owner: '{{ silverstripe_user }}' group: '{{ silverstripe_webserver_user }}' type: 'php5' php5: '{{ silverstripe_user }}' location: '/': try_files $uri @silverstripe; '@silverstripe': | fastcgi_keep_conn on; fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_pass {{ silverstripe_user }}; fastcgi_index index.php; include fastcgi_params; fastcgi_read_timeout 120; fastcgi_connect_timeout 60; fastcgi_send_timeout 120; fastcgi_buffer_size 64k; fastcgi_buffers 4 65k; fastcgi_busy_buffers_size 128k; fastcgi_param SCRIPT_FILENAME $document_root/framework/main.php; fastcgi_param SCRIPT_NAME /framework/main.php; fastcgi_param QUERY_STRING url=$uri&$args; … redirect all domains to the first, e.g. www.demo.silverstrip.es => demo.silverstrip.es
46. Setup database • generate db pass automatically
47. • silverstripe_db_password: '' #will be created silverstripe_db_pass: '{{ silverstripe_db_password if silverstripe_db_password|d() else lookup("password", secret + "/credentials/" + ansible_fqdn + "/mysql/" + silverstripe_db_user + "/password length=" + mysql_password_length) }}' • - role: debops.mysql mysql_users: - name: '{{ silverstripe_db_user }}' state: 'present' password: '{{ silverstripe_db_pass }}' priv: '{{ silverstripe_db_database }}.*:ALL' mysql_databases: - name: '{{ silverstripe_db_database }}'
48. Setup directories • Webroot • Log dirs • Cache dir for staticpublisher • etc..
49. - name: Create silverstipe directories file: path: '{{ item }}' state: 'directory' owner: '{{ silverstripe_user }}' group: '{{ silverstripe_webserver_user }}' mode: '0755' with_items: [ '{{ silverstripe_path_home }}', '{{ silverstripe_path_wwwroot }}' ] - name: create error log dir file: path: '{{ silverstripe_error_log | dirname }}' state: 'directory' owner: '{{ silverstripe_user }}' group: '{{ silverstripe_webserver_user }}' mode: '0750' when: silverstripe_error_log_enabled
50. Setup _ss_environment.php • From Jinja2 template • Using vars for db, domain and paths from above • … and copy it to the server
51. - name: create _ss_environment.php template: src: '../templates/_ss_environment.j2' dest: '{{ silverstripe_path_home + "/_ss_environment.php" }}' owner: '{{ silverstripe_user }}' group: '{{ silverstripe_webserver_user }}'
52. <?php // {{ ansible_managed }} define('SS_ENVIRONMENT_TYPE', '{{ silverstripe_environment_type | default("live") }}'); /* Database connection */ define('SS_DATABASE_CLASS', '{{ silverstripe_db_class }}'); define('SS_DATABASE_SERVER', '{{ silverstripe_db_host }}'); define('SS_DATABASE_USERNAME', '{{ silverstripe_db_user }}'); define('SS_DATABASE_PASSWORD', '{{ silverstripe_db_pass }}'); define('SS_DATABASE_NAME','{{ silverstripe_db_database }}'); {% if silverstripe_error_log_enabled %} define('SS_ERROR_LOG', '{{ silverstripe_error_log }}'); {% endif %} $_FILE_TO_URL_MAPPING['{{ silverstripe_path_wwwroot }}'] = 'http://{{ silverstripe_domains|first }}'; fallback for undefined variables
53. Copy files • Checkout from git • SSH key forwarding is possible
54. - name: checkout project repository in webroot git: repo='{{ silverstripe_repo_url }}' dest='{{ silverstripe_path_wwwroot }}' accept_hostkey=yes tags: deploy-update - name: set file ownership file: > path={{ silverstripe_path_wwwroot }} recurse=yes owner='{{ silverstripe_user }}' group='{{ silverstripe_webserver_user }}' tags: deploy-update tags are useful if you want to run a set of tasks only
55. Run installation scripts - name: run composer update shell: 'cd {{ silverstripe_path_wwwroot }} && composer install --no-dev --prefer-dist -o' tags: deploy-update - name: ensure sake is executable file: > path='{{ silverstripe_sake}}' mode='o+x' tags: deploy-update - name: run dev/build shell: '{{ silverstripe_sake + " dev/build flush" }}' tags: deploy-update -o : optimize autoloader
56. Import data • SQL dump • Assets • Only when variables are defined • Best define it in command line when you really want to overwrite the database
57. - name: copy dump to remote copy: > src='{{ silverstripe_db_dump }}' dest='{{ silverstripe_path_temp + "/" + silverstripe_db_dump|basename }}' owner='{{ silverstripe_user }}' group='{{ silverstripe_webserver_user }}' when: silverstripe_db_dump is defined - name: import sql dump mysql_db: > name='{{ silverstripe_db_database }}' state=import target='{{ silverstripe_path_temp + "/" + silverstripe_db_dump|basename }}' when: silverstripe_db_dump is defined - name: import assets unarchive: > src='{{ silverstripe_assets_dump }}' dest='{{ silverstripe_path_wwwroot + "/assets" }}' copy=yes owner='{{ silverstripe_user }}' group='{{ silverstripe_webserver_user }}' when: silverstripe_assets_dump is defined takes e.g. a .tgz and unpacks it in assets Jinja2 filter to get the filename
58. Import Data #2 • Note to myself: SSPak is made for this https://github.com/silverstripe/sspak • But copy, mysql and unarchive modules are good examples
59. Setup other stuff • You can define whatever you need for your app, e.g. – cache settings (memcached) – cron tasks – …
60. - name: setup cron tasks to rebuild the site every night cron: > name='{{ "rebuild " + silverstripe_project + ", locale " + item.locale }}' job='{{ silverstripe_sake + " dev/tasks/RebuildStaticCacheTask locale=" + item.locale }}' hour='1' minute='{{ item.minute }}' user='{{ silverstripe_user }}' state=present with_items: - { locale: 'de_DE', minute: '22'} - { locale: 'en_US', minute: '24'} could also be a predefined list
61. Run the playbook debops silverstripe-demo.yml -e silverstripe_db_dump=/path/to/demo.sql -e silverstripe_assets_dump=/path/to/assets.tgz define a variable on the command line name of the playbook
63. Source: twitter.com/neomagazin
64. Is there a role for it? • Silverstripe deploy role is in development • Capistrano like deploy with releases: f500 project_deploy https://galaxy.ansible.com/list#/roles/732
65. More resources • Ansible documentation • Debops documentation • Books
66. 10x www.silverstrip.es