The problem is simple.
I use the following command to install Passenger
passenger-install-nginx-module
When Passenger automatically installs nginx, I can't launch it.
nginx -v
Returns there's no nginx installed.
How can I fix this?
Notice that passenger-install-nginx-module asks you where to install Nginx to? The nginx binary is in there. Make sure the appropriate directory is in your $PATH. If you don't know what $PATH is or how to use it then you should read a book about basic Unix/Linux command line skills.
You need install Nginx. the webserver.
If you use passenger 3 in standalone, you just need launch passenger start command
I solved this.
Actually, Passenger did install nginx, it just wasn't in the default category.
I recommend to tell passenger to install nginx in /usr/local/nginx
Related
Is it possible to upgrade Phusion Passenger to a newer version when it is already running (with Nginx in my case)?
I installed Passenger 4.0.0.rc6 using passenger-install-nginx-module. My Nginx config now contains
passenger_root /usr/local/lib/ruby/gems/2.0.0/gems/passenger-4.0.rc6;
passenger_ruby /usr/local/bin/ruby;
Now I want to upgrade to Passenger 4.0.2. I can install the gem, but when I run passenger-install-nginx-module again, it tries to recompile and reinstall Nginx. (I thought it would be so clever to notice there is already a installed Nginx in the location I specify using --prefix)
I tried to manually change passenger_root to the new Passenger gem location but the I get the following error in the Nginx error log:
2013/05/12 12:30:13 [alert] 14298#0: Unable to start the Phusion Passenger watchdog because its executable (/usr/local/lib/ruby/gems/2.0.0/gems/passenger-4.0.2/agents/PassengerWatchdog) does not exist. This probably means that your Phusion Passenger installation is broken or incomplete, or that your 'passenger_root' directive is set to the wrong value. Please reinstall Phusion Passenger or fix your 'passenger_root' directive, whichever is applicable. (-1: Unknown error)
Apparently the PassengerWatchdog is built when running passenger-install-nginx-module. I don't want to copy over PassengerWatchdog from the old gem because something might have changed.
So... what is the proper way to upgrade Passenger without recompiling and reinstalling Nginx (or Apache)?
#Wukerplank's comment put me on the right track. I checked the output when running passenger-install-nginx-module again and it says:
Nginx doesn't support loadable modules such as some other web servers do,
so in order to install Nginx with Passenger support, it must be recompiled.
Do you want this installer to download, compile and install Nginx for you?
1. Yes: download, compile and install Nginx for me. (recommended)
The easiest way to get started. A stock Nginx 1.4.1 with Passenger
support, but with no other additional third party modules, will be
installed for you to a directory of your choice.
2. No: I want to customize my Nginx installation. (for advanced users)
Choose this if you want to compile Nginx with more third party modules
besides Passenger, or if you need to pass additional options to Nginx's
'configure' script. This installer will 1) ask you for the location of
the Nginx source code, 2) run the 'configure' script according to your
instructions, and 3) run 'make install'.
Whichever you choose, if you already have an existing Nginx configuration file,
then it will be preserved.
The important part being that Nginx has to be recompiled to work with Passenger and that existing Nginx configurations are preserved.
So the right way to upgrade Passenger is to
install the new Passenger gem
execute passenger-install-nginx-module with exactly the same parameters as the first time (so the same Nginx version and modules are compiled, it's installed in the same directory etc.)
before installing, check that it says "Welcome to the Phusion Passenger Nginx module installer, v4.0.2." with the new version on top (4.0.2 in my case)
after Nginx is installed, change the passenger_root in your existing Nginx conf (path/to/nginx/conf/nginx.conf) to point to the new gem version (just replace the old version number with the new)
Restart Nginx
Profit
You cannot upgrade without recompiling Nginx. Full upgrade instructions can be found in the Phusion Passenger for Nginx manual. From the manual:
Nginx is a different from other web servers in that it does not support loadable modules. The only way to extend Nginx is to recompile it entirely from source. Since Phusion Passenger consists of some external executables plus an Nginx module, you must recompile Nginx when first installing Phusion Passenger, but also when upgrading Nginx itself or when upgrading the Phusion Passenger version.
Recompiling Nginx and the Phusion Passenger executables is what we will do in this step. The good news is that Phusion Passenger provides a tool to make this easy for you.
If you’ve already installed Nginx before, but without Phusion Passenger support, then you should uninstall it first. You don’t have to, because you can also install another Nginx with Phusion Passenger support, in parallel to the existing Nginx. We merely recommend uninstalling the existing in order to avoid user confusion, but the choice is yours.
If you had previously installed Nginx with Phusion Passenger support, and you are upgrading, then you don’t have to uninstall your existing Nginx first. Instead we’ll overwrite it this step. But it is important that you recompile Nginx with the configure parameters that you used last time.
Is there a way to run Ruby on Rails app on Apache HTTPD (CentOS)?
Is this just a matter of setting up httpd.conf with VirtualHost?
Passenger is probably the easiest way to get that running. Here's a tutorial on installing Passenger on CentOS6, and here are prebuilt rpms.
http://rubyonrails.org/deploy
Check Rails site, I think you have to use a Proxy, unless I'm misunderstanding what you mean by HTTPD. Seems like you want a simple Apache setup, Rails should be able to help.
EDIT: James answer looks perfect. Same as mine, but he has real CENTOS tutorials... I've never used CENTOS, just done this through Ubuntu.
You can run mod_rails aka Passenger or a Mongrel Cluster or Thin Cluster.
I find passenger the easiest, you can download it Here
The Steps are quite easy
sudo gem install passenger
sudo passenger-install-apache2-module
Follow instructions on screen.
I have a server running with nginx serving two php websites, right now I want to make it serving a rails app, I've googled, but there no notes about add passenger support to a existed nginx, all of them are telling me run passenger-install-nginx-module to build a nginx.
Can I add passenger support to my nginx instead of rebuild it?
Thanks for any helps.
You still need to rebuild nginx. If you run passenger-install-nginx-module you will see this output:
Nginx doesn't support loadable modules such as some other web servers do, so in order to install Nginx with Passenger support, it must be recompiled.
See Installing Passenger as a normal Nginx module for steps.
cd /path-to-nginx-source-dir
./configure --prefix=/opt/nginx \
--add-module=$(passenger-config --nginx-addon-dir) \
--add-module=/path-to-some-nginx-module
make
sudo make install
The value for /path-to-passenger-module can be obtained with the command:
passenger-config --nginx-addon-dir
There is no need to rebuild nginx if you use Phusion Passenger Standalone.
From Passenger's wiki:
"But I don't want to recompile Nginx. Are there alternatives?"
Yes. Use Phusion Passenger's Standalone mode. Phusion Passenger
Standalone is a standalone server. It does not extend Nginx so it does
not need to recompile Nginx. It will therefore work perfectly with
your existing Nginx installation.
When using Passenger Standalone, you are supposed to:
Start Passenger Standalone on a certain port or socket file.
Add reverse proxy rules to your Nginx configuration file, to forward requests to Passenger Standalone.
If you've ever used Unicorn and Puma, then using Passenger Standalone
will be very familiar: usage is almost the same.
I have done a Phusion Passenger setup on Ubuntu 10.04, with Apache2. Whenever I restart the Apache server I got the following error message, and the Rails application is not running.
[error] *** Passenger could not be initialized because of this error: Unable to start the Phusion Passenger watchdog because its executable (/usr/lib/phusion-passenger/agents/PassengerWatchdog) does not exist. This probably means that your Phusion Passenger installation is broken or incomplete, or that your 'PassengerRoot' directive is set to the wrong value. Please reinstall Phusion Passenger or fix your 'PassengerRoot' directive, whichever is applicable.
I ran into the same problem when compiling from source, but it was intermittent, which was really frustrating (I think it has to w/ Rails environments). We couldn't use the passenger-install-apache2-module/passenger-install-nginx-module scripts, because we needed a customized nginx installation.
I finally fixed the problem by going to whatever the passenger-config --root is, then running: rake nginx.
Update February 2016 (by Passenger author):
The officially supported method to compile PassengerAgent (without also compiling Nginx, as passenger-install-nginx-module does) is with this command:
passenger-config compile-agent
Passenger 5.0.26 and later will automatically detect the error described in this StackOverflow question, and will automatically suggest running the above command.
I've just hit this error myself and struggled to find a good answer, so here's my writeup.
In my setup I'm going for Ubuntu, Apache2, the latest Passenger and Rails 2.3.
Install Ruby and Rubygems NB: make (very) sure your gem -v is correct, if it's wrong you'll do all this twice
sudo gem install passenger
cd /usr/lib
wget http://rubyforge.org/frs/download.php/76005/passenger-3.0.12.tar.gz
tar zxvf passenger-3.0.12.tar.gz
cd passenger-3.0.12
./bin/passenger-install-apache2-module
Add export PATH=/var/lib/gems/1.8/bin:$PATH to ~/.bashrc
ln -s /usr/lib/passenger-3.0.12 /usr/share/phusion-passenger # => this fixes a world of hurt to do with PassengerWatchdog. NB: PassengerWatchdog doesn't come down with apt-get which is why we grabbed the binaries.
ln -s /usr/lib/passenger-3.0.12 /usr/lib/phusion-passenger # => similar issues.
This is from memory following thrashing it through for the last day and a half, I'll tidy up when I have to go through it again.
Try to install passenger module by running script passenger-install-apache2-module .
I had same problem but on nginx; I installed passenger via gem and then recompiled nginx manually with passenger module - this caused error described by you. After running passenger-install-nginx-module such error disappeared.
It had been a while since I had restarted nginx and in the meantime the path to passenger had changed. I looked in the nginx.conf to see what the passenger_root was set to and realized that it was the old value:
http {
passenger_root /home/nginx/rails_app/myapp/shared/bundle/ruby/1.9.1/gems/passenger-enterprise-server-3.0.17;
There are often two places to change:
server {
listen 8888;
root /home/nginx/rails_app/myapp/current/public;
I restarted nginx and the error was gone.
I had the same issue on my Nginx-Server.
In my case, the passenger_root directory was not correct, because of gem update.
[1] On Linux, i searched the passenger Directory with the following Command:
find / -name PassengerWatchdog
[2] Now i changed my 'passenger_root' Value to this Directory.
[3] And restart the Server.
suvankar, Maybe you should change your Passenger Path too.
I had nginx installed with yum. But I needed to install Phusion Passenger. I followed the guide on Passenger website and the command that installs nginx support actually compiled and installed another copy of nginx on my system with Passenger support. The default "service nginx start" for Fedora works with the initial yum installed nginx. If I need Passenger support I have to start nginx manually from /opt/nginx/sbin/nginx and it also uses a config file of its own. I would like to know if there was a cleaner or more proper way to get nginx and Phusion Passenger working on Fedora.
I've done this on Ubuntu Server and I wound up uninstalled the nginx package and letting Passenger install nginx it for me.
From what I understand of nginx, it doesn't support modules like Apache does. So there's no way to install just a passenger module. It has to be baked into a special patched version of nginx.