multi-environment git deployment with codeigniter - cicon2011

Multi-Environment Git Deployment with CodeIgniter-Ben Edmunds

• What is Git?

• Distributed Version Control

• Why use version control?

• Change tracking and roll-back

• Multi-developer projects

• Deployment

• Why use Git?

• Branching

• Feature branches

• Environment deployment with branches

• What is Deployment?

• Automated update and setup of code

• Why use deployments?

• FTP = nasty

• Humans suck

• Ease of use

Local Staging Production(Development) (QA) (Live)

Basic Deployment Scenario

Local Development Setup

$ git init$ git remote add origin yourRepo.git$ git pull origin master

$ git checkout -b staging$ git push origin staging

$ git checkout -b production$ git push origin master

Branch Setup

$ git checkout -b staging$ git push origin staging

$ git checkout -b production$ git push origin master

Deployment Code

<?php

define('ENV', 'production');define('ENV_BASE_PATH', '/home/benedmunds/domains/benedmunds.com/');

class Deployment extends CI_Controller{

function post_receive() { ... } }

?>

Deployment Code

post_receive() { ... }

• json_decode($_POST[‘payload’])

• Check payload ref against ENV

• Execute Git commands to clean and pull the correct branch

Deployment Codefunction post_receive(){ if (isset($_POST['payload']) && !empty($_POST['payload'])) { $payload = json_decode($_POST['payload']); //make sure this is the correct environment if ($payload->ref == 'refs/heads/' . ENV) { log_message('debug', 'DEPLOYMENT: Post-receive hook - '. ENV); //reset, clean and pull shell_exec('/usr/bin/git --git-dir="' . ENV_BASE_PATH . '.git" ‘ . ‘--work-tree="' . ENV_BASE_PATH . '" ‘ . ‘reset --hard HEAD'); shell_exec('/usr/bin/git --git-dir="' . ENV_BASE_PATH . '.git" ‘ . ‘--work-tree="' . ENV_BASE_PATH . '" clean -f'); shell_exec('/usr/bin/git --git-dir="' . ENV_BASE_PATH . '.git" ‘ . ‘--work-tree="' . ENV_BASE_PATH . '" ‘ . ‘pull origin ' . ENV); } } }

class Migration_Create_accounts extends Migration { function up() { $this->migrations->verbose AND print "Creating table accounts...";

if ( ! $this->db->table_exists('accounts')) { // Setup Keys $this->dbforge->add_key('id', TRUE);

$this->dbforge->add_field(array( 'id' => array('type' => 'INT', 'constraint' => 5, 'unsigned' => TRUE, 'auto_increment' => TRUE), 'company_name' => array('type' => 'VARCHAR', 'constraint' => '200', 'null' => FALSE), 'first_name' => array('type' => 'VARCHAR', 'constraint' => '200', 'null' => FALSE), 'last_name' => array('type' => 'VARCHAR', 'constraint' => '200', 'null' => FALSE), 'phone' => array('type' => 'TEXT', 'null' => FALSE), 'email' => array('type' => 'TEXT', 'null' => FALSE), 'address' => array('type' => 'TEXT', 'null' => FALSE), 'Last_Update' => array('type' => 'DATETIME', 'null' => FALSE) ));

$this->dbforge->add_field("Created_At TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP"); $this->dbforge->create_table('accounts', TRUE); } }

function down() { $this->dbforge->drop_table('accounts'); }}

Migrationshttps://github.com/philsturgeon/codeigniter-migrations

if ( ! $this->migration->latest()){ show_error($this->migration->error);}

Migrationshttps://github.com/philsturgeon/codeigniter-migrations

Staging Server Setup

$ git init$ git remote add origin yourRepo.git$ git pull origin staging

Production Server Setup

$ git init$ git remote add origin yourRepo.git$ git pull origin production

Github Post Receive Hook

Pushing to Master

$git checkout master$ git commit -am ‘Made code change’$ git push origin master

Local Github

Pushing to Staging

$ git checkout staging$ git merge master$ git push origin staging

Local Github Staging

Pushing to Production

$ git checkout production$ git merge staging$ git push origin production

Local Github Production

Local Staging Production(Development) (QA) (Live)

Multi-Environment Git Deployment with CodeIgniter-Ben Edmunds