Deploy your application in a box - DPC2016

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Deploy your application in a box @willemjanz joind.in/talk/73636

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Willem-Jan Zijderveld @willemjanz github.com/wjzijderveld

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Don't wait till the last slide with questions

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Deployment With the usual disclaimer

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It works So why change it?

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Can you deploy whenever you want?

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Are you ever hesitant to deploy?

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"We can't deploy, Robin is sick today"

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Do users notice when you deploy?

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Things break If you like it or not

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Deployments fail ● Network issues ● Migrations ● Broken configuration

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Downtime

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Missed revenue

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Angry customers

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Customers losing faith

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Scared to deploy

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Deployments get postponed

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Reserving dedicated time to deploy

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Deploying outside office hours...

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So what would be a more optimal method?

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Less humans

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No sweat

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More often

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0 downtime

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Repeatable

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Let's get started

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Less humans Automate your deploy process to a single step

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Possible deployment Migrate database Update code on server (FTP, SSH) Update code dependencies (composer,npm,bower) Clear cache Reload webserver

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> ssh your-server.com > sudo su - > cd /var/www/ > git pull > php composer.phar install > npm install > rm -rf app/cache/* > # Some permission commands > service php-fpm reload Example: before

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Example: after > ssh [email protected] > ./deploy.sh * Pulling changes * Updating dependencies * Migrating database * Clearing cache * DEPLOYED NEW VERSION

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No sweat Lose the fear of deploying

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Testing

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Seriously, test your code

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New code should have tests

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Legacy code? Test the critical parts - Unit tests for important (domain) logic - Functional tests - Monitor production

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Continuous Integration

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More often

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Smaller changes

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6 month projects Deliver something every day Don't wait with deploying until your feature is ready and approved.

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Short lived branches ● Allows for rapid deployment ● Prevents huge merge conflicts ● Speeds up overall development

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Feature toggles

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Example: recommendations getBasketOfUser($user); $response = ['basket' => $basket->toArray()]; if ($this->featureIsActive('recommendations')) { $response['recommendations'] = $this->getRecommendations($basket); } return new JsonResponse($response); }

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Give some users access

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Conditional toggle Check the context against the conditions of the toggle

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Example: Conditional toggle GreaterThan(42)] ); $toggle->active(['user_id' => 21]); // true $toggle->active(['user_id' => 1337]); // false

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Example: Conditional toggle GreaterThan(42)] ); $toggle->active(['user_id' => 21]); // true $toggle->active(['user_id' => 1337]); // false

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Example: Conditional toggle GreaterThan(42)] ); $toggle->active(['user_id' => 21]); // true $toggle->active(['user_id' => 1337]); // false

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Example: Conditional toggle GreaterThan(42)] ); $toggle->active(['user_id' => 21]); // true $toggle->active(['user_id' => 1337]); // false

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Feature management GUI API Redis http://labs.qandidate.com/blog/2014/08/19/open-sourcing-our-feature-toggle-api-and-ui/

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More often - Smaller iterations - Don't wait for the whole feature to complete - Make use of feature toggles

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0 downtime

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Prepare your deployment

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Deployment Webserver Application - version 1

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Deployment Webserver Application - version 1 Application - version 2

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Deployment Webserver Application - version 1 Application - version 2

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Deployment Webserver Application - version 1

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Deployment Webserver Application - version 1 Install code

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Deployment Webserver Application - version 1 Install code Migrations

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Deployment Webserver Application - version 1 Install code Migrations Warmup cache

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Deployment Webserver Application - version 1 Install code Migrations Warmup cache Application - version 2

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Deployment Webserver Application - version 1 Install code Migrations Warmup cache Application - version 2

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Example /var /project /releases /20160608-1.0 /20160609-1.1 /current -> /var/project/releases/20160608-1.0

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0 downtime - Don't touch the current version - Abort when any of the steps fail - Make your migrations backwards compatible

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Put it in a box

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Repeatable

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Environment independent

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The box In it's simplest form: just a zip

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Independent

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Reusable On all environments

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Some challenges

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Filesystem

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/var/www/uploads/

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Flysystem Abstract the filesystem - Makes it easier to test - Makes your code independent of the filesystem, f.e.: - Production uses S3 - Development uses local files

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# config.yml oneup_flysystem: adapters: private_s3: awss3v2: client: aws_s3_client bucket: %s3_private_files_bucket% filesystem: private: adapter: private_s3

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filesystem ->writeStream('avatars/' . $filename, $stream); if (is_resource($stream)) { fclose($stream); } }

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File is now at S3: bucket/avatars/filename. ext

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Configuration

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# config_prod.yml imports: - { resource: config.yml } doctrine: dbal: default_connection: default connections: default: driver: pdo_mysql host: 192.168.1.10 dbname: acme_prod user: acme_prod password: SuperSecure

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What about staging and acceptance?

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Give control to the environment

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# config.yml imports: - { resource: parameters.yml } - { resource: parameters.php } doctrine: dbal: default_connection: default connections: default: driver: pdo_mysql host: %db.hostname% dbname: %db.name% user: %db.user% password: %db.password%

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'MYAPP_S3_PRIVATE_FILES_BUCKET', ]; foreach ($parameterMapping as $parameter => $env) { if (false !== ($value = getenv($env))) { $container->setParameter($parameter, $value); } }

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$_ENV['SYMFONY__*'] But those values get overwritten by parameters defined in config.yml / parameters.yml

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PHP dot env https://github.com/vlucas/phpdotenv

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load(); Load .env # .env MYAPP_S3_PRIVATE_FILES_BUCKET=yourbucket

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Building the box - Should be reusable - Eliminate hard dependencies on environment - Give control to the environment

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Summary - Less manual steps, eliminate the humans - Lose the fear: test your stuff - Deploy more often, don't postpone - Deployment shouldn't cause downtime - A deployment should be repeatable

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Other questions? @willemjanz Please leave some feedback! joind.in/talk/73636