Installing Passenger + Nginx on a Linux/Unix production server
for Python apps + Red Hat 7 / CentOS 7 (with RPM)

This page describes the installation of Passenger through the following operating system or installation method: Red Hat 7 / CentOS 7 (with RPM). Not the configuration you are looking for? Go back to the operating system / installation method selection menu.

No Amazon Linux RPMs

Our YUM repository may not be used with Amazon Linux. Amazon Linux is too different from RHEL and CentOS. If you are on Amazon Linux, please go back to the operating system menu and select "Other / OS independent (generic installation method)".

On this page, we will install Passenger. After installing Passenger we can begin with deploying the app.

Table of contents

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Step 1: enable EPEL

Passenger requires EPEL. The instructions differ depending on whether you are on Red Hat or CentOS.

Red Hat

Step 1:
install EPEL package
$ if ! rpm -q epel-release; then sudo yum install -y yum-utils \
http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm; fi
$ sudo yum-config-manager --enable epel
Step 2:
enable the 'optional' and 'extras' repositories
Enable the optional and extras repositories (rhel-7-server-optional-rpms, rhel-7-server-extras-rpms). This can be done by enabling the RHEL optional subchannel for RHN-Classic. For certificate-based subscriptions see Red Hat Subscription Management Guide.

CentOS

$ sudo yum install -y epel-release yum-utils
$ sudo yum-config-manager --enable epel

Step 2: install Passenger packages

These commands will install Passenger Nginx through Phusion's YUM repository. If you already had Nginx installed, then these commands will upgrade Nginx to Phusion's version (with Passenger compiled in).

# Install various prerequisites
sudo yum install -y pygpgme curl

# Add our el7 YUM repository
sudo curl --fail -sSLo /etc/yum.repos.d/passenger.repo https://oss-binaries.phusionpassenger.com/yum/definitions/el-passenger.repo

# Install Passenger Nginx
sudo yum install -y nginx passenger

Step 3: enable the Passenger Nginx module and restart Nginx

Edit /etc/nginx/conf.d/passenger.conf and uncomment passenger_root, passenger_ruby and passenger_instance_registry_dir. For example, you may see this:

# passenger_root /some-filename/locations.ini;
# passenger_ruby /usr/bin/ruby;
# passenger_instance_registry_dir /var/run/passenger-instreg;

Remove the '#' characters, like this:

passenger_root /some-filename/locations.ini;
passenger_ruby /usr/bin/ruby;
passenger_instance_registry_dir /var/run/passenger-instreg;

If you don't see a commented version of passenger_root or passenger_instance_registry_dir inside passenger.conf, then you need to insert them yourself.

Run passenger-config --root. It will tell output some path. For example:

$ passenger-config --root
/some-filename/locations.ini

Insert a passenger_root configuration option into /etc/nginx/conf.d/passenger.conf using the value you obtained. Ensure that passenger_instance_registry_dir is set to /var/run/passenger-instreg. For example:

passenger_root /some-filename/locations.ini;
passenger_instance_registry_dir /var/run/passenger-instreg;

When you are finished with this step, restart Nginx:

$ sudo service nginx restart

Step 4: check installation

After installation, please validate the install by running sudo /usr/bin/passenger-config validate-install. For example:

$ sudo /usr/bin/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 Nginx has started the Passenger core processes. Run sudo /usr/sbin/passenger-memory-stats. You should see Nginx processes as well as Passenger processes. For example:

$ sudo /usr/sbin/passenger-memory-stats
Version: 5.0.8
Date   : 2015-05-28 08:46:20 +0200
...

---------- Nginx processes ----------
PID    PPID   VMSize   Private  Name
-------------------------------------
12443  4814   60.8 MB  0.2 MB   nginx: master process /usr/sbin/nginx
12538  12443  64.9 MB  5.0 MB   nginx: worker process
### Processes: 3
### Total private dirty RSS: 5.56 MB

----- Passenger processes ------
PID    VMSize    Private   Name
--------------------------------
12517  83.2 MB   0.6 MB    PassengerAgent watchdog
12520  266.0 MB  3.4 MB    PassengerAgent server
12531  149.5 MB  1.4 MB    PassengerAgent logger
...

If you do not see any Nginx processes or Passenger processes, then you probably have some kind of installation problem or configuration problem. Please refer to the troubleshooting guide.

Step 5: update regularly

Nginx updates, Passenger updates and system updates are delivered through the YUM package manager regularly. You should run the following command regularly to keep them up to date:

$ sudo yum update

After an update, you should restart Nginx. Doing so will automatically restart Passenger too.

Next step

Now that you have installed Passenger, you are ready to deploy your Python application on the production server!

Continue: Deploy app »