Deploying application updates
with Passenger in Nginx mode
In the previous step, you deployed an application to your production server for the first time. But what do you do when you have updated your app, and need to deploy updates? You will learn that on this page.
Table of contents
1 Transferring latest code
1.1 Login to the server as the application's user
Login to your server with SSH:
local-computer$ ssh -i your_ec2_key.pem email@example.com
myappuser with name of the application's OS user account.
1.2 Pull latest code from Git
Go to your application's code directory on the server, then use Git to pull the latest code:
$ cd /var/www/myapp/code $ git pull
2 Prepare application
2.1 Switch to the appropriate Ruby interpreter
If you have multiple Ruby interpreters on your system, then you must ensure that your shell has activated the same Ruby interpreter that you used when you first deployed your app.
For example, if you are using RVM to manage Ruby interpreters, run the following (assuming your app is supposed to use Ruby 2.3.3).
$ rvm use ruby-2.3.3
2.2 Install app dependencies
Your application's gem dependencies may have changed, so we should install any updated gem dependencies. Run:
$ bundle install --deployment --without development test
2.3 Compile Rails assets and run database migrations
If your app is a Rails app, then you need to compile the latest Rails assets and run any database migrations. If your app is not a Rails app, please skip to the next step.
$ bundle exec rake assets:precompile db:migrate RAILS_ENV=production
3 Restart application
Passenger may still be serving an old instance of your application. Now that all application updates have been prepared, tell Passenger to restart your application so that the updates take effect.
$ passenger-config restart-app $(pwd)