Installing Passenger + Apache on a Digital Ocean production server
for Ruby apps + generic installation through RubyGems (without RVM)
On this page, we will install Passenger. After installing Passenger we can begin with deploying the app.
Table of contents
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Installation
Step 1: install gem
Install the Passenger gem with:
$ gem install passenger --no-rdoc --no-ri
The --no-rdoc --no-ri argument isn't really necessary, but it makes installation faster by skipping generation of API documentation.
gem install abort with a "permission denied" error? Then re-run it with
sudo.
Step 2: run the Passenger Apache module installer
Run the Passenger Apache module installer and follow the on-screen instructions:
passenger-install-apache2-module
At the end of the installation process, you will be asked to copy and paste a configuration snippet (containing LoadModule, PassengerRoot, etc.) into your Apache configuration file.
Different operating systems and Apache installations have different conventions with regard to where the Apache configuration file is and how it is organized. Please read Working with the Apache configuration file if you are not familiar with it. That page is especially of interest for macOS Server >= 10.8 users because the configuration file may be at a surprising location.
Step 3: validate installation
After installation, please validate the install by running sudo passenger-config validate-install. For example:
$ sudo passenger-config validate-install * Checking whether this Phusion Passenger install is in PATH... ✓ * Checking whether there are no other Phusion Passenger installations... ✓
All checks should pass. If any of the checks do not pass, please follow the suggestions on screen.
Finally, check whether Apache has started the Passenger core processes. Run sudo passenger-memory-stats. You should see Apache processes as well as Passenger processes. For example:
$ sudo passenger-memory-stats Version: 5.0.8 Date : 2015-05-28 08:46:20 +0200 ---------- Apache processes ---------- PID PPID VMSize Private Name -------------------------------------- 3918 1 190.1 MB 0.1 MB /usr/sbin/apache2 ... ----- Passenger processes ------ PID VMSize Private Name -------------------------------- 12517 83.2 MB 0.6 MB Passenger watchdog 12520 266.0 MB 3.4 MB Passenger core 12531 149.5 MB 1.4 MB Passenger ust-router ...
If you do not see any Apache processes or Passenger processes, then you probably have some kind of installation problem or configuration problem. Please refer to the troubleshooting guide.
FAQ
Some of the dependent libraries are installed in non-standard locations. How do I allow the compiler to find them?
Please refer to Customizing the compilation process.
How do I pass additional flags to the compiler?
Please refer to Customizing the compilation process.
Next step
Now that you have installed Passenger, you are ready to deploy your Ruby application on the production server!