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Ansible, EC2 and PHPEasy Orchestration
www.bipsync.com
www.bipsync.com
IANAL
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IANASWANB
www.bipsync.com
In March 2014…
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• Ad hoc local development in OS X
• Hand-built production systems in AWS
• Various installation notes kept in wiki
And now…
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• Local development in Vagrant VMs
• Virtual Machines provisioned by Ansible playbooks
• Production systems provisioned by playbooks
• Ansible playbooks are living documentation
Application environment
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• Hosted in Virtual Private Cloud (VPC)
• Load balanced application web servers
• Worker instances
• Search cluster
• Database cluster
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App
Worker
Database
Vagrant VM
Search
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App App
Worker Search
Database
Load Balancer
VPC
DatabaseDatabase
Search
Ansible tasks
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- name: Install php-fpm and dependencies ! yum: name={{ item }} state=present ! with_items: ! - php ! - php-fpm ! - php-mysql
Ansible playbooks
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- name: Install MySQL, Nginx, and PHP-FPM
hosts: webservers
roles: ! - common ! - mysql ! - nginx ! - php-fpm
Provisioning Vagrant VMs
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1. Define an Ansible playbook
2. Define a vagrant configuration file which runs the playbook
3. vagrant up
Provisioning in EC2
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1. Define an Ansible playbook
2. Create an instance from an Amazon Machine Image (AMI) within a given subnet
3. Store relevant outcomes as facts - allows us to refer to them later in the playbook
4. Wait until SSH is available, perform additional provisioning
Demo
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Taking it further
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1. Master playbook includes playbooks sequentially
2. Facts are maintained from one playbook to the next
3. Once all resources are available, configuration playbooks use facts to connect them together
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deploy_all.yml
deploy_vpc.yml deploy_elb.yml deploy_app.yml
deploy_worker.ymldeploy_search.ymldeploy_db.yml
configure.yml
Demo
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Provisioning PHP
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• Bipsync’s OS of choice is Ubuntu
• We use semi-official packages from https://launchpad.net/~ondrej/+archive/ubuntu/php5
• Installation (PHP-FPM, PECL, config) is pretty straightforward…
• But not totally straightforward
Demo
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What else do we do?
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• Install and configure Supervisor for long running tasks
• Cron jobs
• Upgrades
• Migrations
• Continuous integration
Why is this cool?
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1. Lowers risk
2. Breaks down barriers
3. Enhances scalability
4. Fits the programmer’s mindset
5. Lots of scrolling text on your terminal
Words of warning
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• Beware Ansible bugs - turn on termination protection
• Provisioning can take time - make use of AMIs
• Costs can escalate quickly - look at Eucalyptus
• It’s not programming, it’s scripting
Further Reading
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• Ansible Up and Running (Loren Hochstein) - Free preview at http://www.ansible.com/ansible-book
• Vagrant Cookbook (Erika Heidi)
• https://groups.google.com/forum/#!forum/ansible-project
