What is Passenger?

Passenger (AKA mod_rails or mod_rack) is an Apache 2.x module which lets you run Rails or Rack applications inside a general purpose web server, like Apache httpd or nginx.

Install Apache and Passenger

Make sure puppet master has been run at least once (or puppet agent, if this master is not the CA), so that all required SSL certificates are in place.

Install Apache 2

[root@centos ~]# yum install httpd httpd-devel mod_ssl ruby-devel rubygems gcc

Installed:
gcc.x86_64 0:4.4.7-11.el6 httpd.x86_64 0:2.2.15-39.el6.centos httpd-devel.x86_64 0:2.2.15-39.el6.centos mod_ssl.x86_64 1:2.2.15-39.el6.centos ruby-devel.x86_64 0:1.8.7.374-2.el6

Complete!

Install Rack/Passenger

[root@centos ~]# gem install rack passenger
Successfully installed rack-1.5.2
Building native extensions. This could take a while...
Successfully installed rake-10.3.2
Successfully installed daemon_controller-1.2.0
Successfully installed passenger-4.0.53
4 gems installed
Installing ri documentation for rack-1.5.2...
Installing ri documentation for rake-10.3.2...
Installing ri documentation for daemon_controller-1.2.0...
Installing ri documentation for passenger-4.0.53...
Installing RDoc documentation for rack-1.5.2...
Installing RDoc documentation for rake-10.3.2...
Installing RDoc documentation for daemon_controller-1.2.0...
Installing RDoc documentation for passenger-4.0.53...

[root@centos ~]# yum install zlib-devel openssl-devel libcurl-devel gcc-c++

Installed:
gcc-c++.x86_64 0:4.4.7-11.el6 libcurl-devel.x86_64 0:7.19.7-37.el6_5.3 openssl-devel.x86_64 0:1.0.1e-30.el6_6.2 zlib-devel.x86_64 0:1.2.3-29.el6

Complete!

[root@centos ~]# passenger-install-apache2-module
Welcome to the Phusion Passenger Apache 2 module installer, v4.0.53.

This installer will guide you through the entire installation process. It
shouldn't take more than 3 minutes in total.

Here's what you can expect from the installation process:

1. The Apache 2 module will be installed for you.
2. You'll learn how to configure Apache.
3. You'll learn how to deploy a Ruby on Rails application.

Don't worry if anything goes wrong. This installer will advise you on how to
solve any problems.

Press Enter to continue, or Ctrl-C to abort.

--------------------------------------------

Which languages are you interested in?

Use <space> to select.
If the menu doesn't display correctly, press '!'

??猬? Ruby
猬? Python
猬? Node.js
猬? Meteor

--------------------------------------------

Checking for required software...

* Checking for C compiler...
Found: yes
Location: /usr/bin/cc
* Checking for C++ compiler...
Found: yes
Location: /usr/bin/c++
* Checking for Curl development headers with SSL support...
Found: yes
Usable: yes
Header location: /usr/include/curl/curl.h
Supports SSL: yes
curl-config location: /usr/bin/curl-config
Version: libcurl 7.19.7
* Checking for OpenSSL development headers...
Found: yes
Location: /usr/include/openssl/ssl.h
* Checking for Zlib development headers...
Found: yes
Location: /usr/include/zlib.h
* Checking for Apache 2...
Found: yes
Location of httpd: /usr/sbin/httpd
Apache version: 2.2.15
* Checking for Apache 2 development headers...
Found: yes
Location of apxs2: /usr/sbin/apxs
* Checking for Rake (associated with /usr/bin/ruby)...
Found: yes
Location: /usr/bin/ruby /usr/bin/rake
* Checking for OpenSSL support for Ruby...
Found: yes
* Checking for RubyGems...
Found: yes
* Checking for Ruby development headers...
Found: yes
Location: /usr/lib64/ruby/1.8/x86_64-linux/ruby.h
* Checking for rack...
Found: yes
* Checking for Apache Portable Runtime (APR) development headers...
Found: yes
Location: /usr/bin/apr-1-config
Version: 1.3.9
* Checking for Apache Portable Runtime Utility (APU) development headers...
Found: yes
Location: /usr/bin/apu-1-config
Version: 1.3.9

--------------------------------------------

Sanity checking Apache installation...
All good!

--------------------------------------------
Almost there!

Please edit your Apache configuration file, and add these lines:

LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-4.0.53/buildout/apache2/mod_passenger.so
<IfModule mod_passenger.c>
PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-4.0.53
PassengerDefaultRuby /usr/bin/ruby
</IfModule>

After you restart Apache, you are ready to deploy any number of web
applications on Apache, with a minimum amount of configuration!

Press ENTER to continue.

Configure Apache

Keepalive Timeout

Make sure Apache’s KeepAliveTimeout setting is set to at least 5. (my default is 15, [root@centos ~]# vim /etc/httpd/conf/httpd.conf)

Install the Puppet Master Rack Application

Your copy of Puppet includes a config.ru file, which tells Rack how to spawn puppet master processes. To install this Rack application in a form Passenger can use, you’ll need to:

  • Create three directories for the application (a parent directory, a “public” directory, and a “tmp” directory)
  • Copy the ext/rack/config.ru file from the Puppet source code into the parent directory
  • Set the ownership of the config.ru file

[root@centos ~]# mkdir -p /usr/share/puppet/rack/puppetmasterd
[root@centos ~]# mkdir /usr/share/puppet/rack/puppetmasterd/public /usr/share/puppet/rack/puppetmasterd/tmp
[root@centos ~]# cp /usr/share/puppet/ext/rack/config.ru /usr/share/puppet/rack/puppetmasterd/
[root@centos ~]# chown puppet:puppet /usr/share/puppet/rack/puppetmasterd/config.ru

Create and Enable the Puppet Master Vhost

See “Example Vhost Configuration” below for the contents of this vhost file. Note that the vhost’sDocumentRoot directive refers to the Rack application directory you created above.

[root@centos ~]# cp /usr/share/puppet/ext/rack/example-passenger-vhost.conf /etc/httpd/conf.d/puppetmaster.conf

[root@centos httpd]# vim /etc/httpd/conf.d/puppetmaster.conf

# you probably want to tune these settings
#
LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-4.0.53/buildout/apache2/mod_passenger.so
<IfModule mod_passenger.c>
PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-4.0.53
PassengerDefaultRuby /usr/bin/ruby
</IfModule>

PassengerHighPerformance on
PassengerMaxPoolSize 12
PassengerPoolIdleTime 1500
# PassengerMaxRequests 1000
PassengerStatThrottleRate 120
#RackAutoDetect Off
#RailsAutoDetect Off

Listen 8140

<VirtualHost *:8140>
SSLEngine on
SSLProtocol ALL -SSLv2 -SSLv3
SSLCipherSuite EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA
SSLHonorCipherOrder on

SSLCertificateFile /var/lib/puppet/ssl/certs/centos.test.com.pem
SSLCertificateKeyFile /var/lib/puppet/ssl/private_keys/centos.test.com.pem
SSLCertificateChainFile /var/lib/puppet/ssl/ca/ca_crt.pem
SSLCACertificateFile /var/lib/puppet/ssl/ca/ca_crt.pem
# If Apache complains about invalid signatures on the CRL, you can try disabling
# CRL checking by commenting the next line, but this is not recommended.
SSLCARevocationFile /var/lib/puppet/ssl/ca/ca_crl.pem
# SSLCARevocationCheck chain
SSLVerifyClient optional
SSLVerifyDepth 1
# The `ExportCertData` option is needed for agent certificate expiration warnings
SSLOptions +StdEnvVars +ExportCertData

# This header needs to be set if using a loadbalancer or proxy
RequestHeader unset X-Forwarded-For

RequestHeader set X-SSL-Subject %{SSL_CLIENT_S_DN}e
RequestHeader set X-Client-DN %{SSL_CLIENT_S_DN}e
RequestHeader set X-Client-Verify %{SSL_CLIENT_VERIFY}e

DocumentRoot /usr/share/puppet/rack/puppetmasterd/public/
RackBaseURI /
<Directory /usr/share/puppet/rack/puppetmasterd/>
Options None
AllowOverride None
Order allow,deny
allow from all
</Directory>
ErrorLog /var/log/httpd/centos.test.com_error.log
CustomLog /var/log/httpd/centos.test.com_ssl_access.log combined

</VirtualHost>

Start or Restart the Apache service

[root@centos httpd]# /etc/init.d/puppetmaster stop

[root@centos httpd]# /etc/init.d/httpd start

Test on puppet agent

[root@yum01 ~]# puppet agent --test
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Caching catalog for yum01.test.com
Info: Applying configuration version '1414995991'

Reference

https://docs.puppetlabs.com/guides/passenger.html

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