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Installing Passenger
Enterprise Linux 9: Red Hat, CentOS, Rocky, Alma (with RPM)

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This page describes the installation of Passenger through the following operating system or installation method: Enterprise Linux 9: Red Hat, CentOS, Rocky, Alma (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 Enterprise Linux. If you are on Amazon Linux, please go back to the operating system selection menu and select "Other / OS independent (generic installation method)".

Table of contents

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Step 1: enable EPEL

The instructions differ depending on whether you are on Red Hat or another Enterprise Linux. The second step is only necessary on Red Hat.

Step 1:
install EPEL package
Passenger requires EPEL.
$ sudo yum install -y yum-utils
$ sudo yum install -y$(< /etc/redhat-release tr -dc '0-9.'|cut -d \. -f1).noarch.rpm
$ sudo yum-config-manager --enable epel
$ sudo yum clean all && sudo yum update -y
Step 2 (RHEL only):
enable the 'optional' repository
Enable the optional repository (rhel-9-server-optional-rpms). This can be done by enabling the RHEL optional subchannel for RHN-Classic. For certificate-based subscriptions see Red Hat Subscription Management Guide. The following commands may be helpful, but are not thoroughly tested.
$ sudo subscription-manager register --username $RHN_USERNAME --password $RHN_PASSWORD --auto-attach
$ sudo subscription-manager repos --enable rhel-9-server-optional-rpms

Step 2: repair potential system issues

These commands will fix common issues that prevent yum from installing Passenger

# Ensure curl and nss/openssl are sufficiently up-to-date to talk to the repo
sudo yum update -y

# if the output of date is wrong, please follow these instructions to install ntp

sudo yum install -y ntp
sudo chkconfig ntpd on
sudo ntpdate
sudo service ntpd start

sudo yum -y install chrony
sudo systemctl enable chronyd
sudo firewall-cmd --permanent --add-service=ntp
sudo firewall-cmd --reload
sudo systemctl restart chronyd

Step 3: install Passenger packages

These commands will install Passenger dynamic Nginx module through Phusion's YUM repository.

If you want to use our packaged Nginx module, you must use your distro's provided Nginx package. If for example you have the repo provided by NGINX setup, you will instead need to compile a dynamic module compatible with that Nginx.

# Install various prerequisites
sudo yum install -y  curl

# Add our el9 YUM repository
sudo curl --fail -sSLo /etc/yum.repos.d/passenger.repo

# Install Passenger dynamic Nginx module
sudo yum install -y nginx-mod-http-passenger || { sudo yum-config-manager --enable cr && sudo yum install -y nginx-mod-http-passenger ; }

Step 4: restart Nginx

Now that the Passenger Nginx module is installed, restart Nginx to ensure that Passenger is activated:

$ sudo systemctl restart nginx

Step 5: 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 6: 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.

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