I’m currently setting up my first Ruby on Rails environments. This post is mainly a reminder to myself of what steps I needed to take to get everything up and running. If it helps you, even better! Why not leave a comment and tell me?
If you find any errors or know of better ways to do things, please leave a comment!
Create an RSA key and associate it with a server
To create an rsa key, run:
$ ssh-keygen -t rsa
The default name and location for the key will be:
id_rsa is your private key and id_rsa.pub is your public key.
To associate a key with a server (so the rsa key is used instead of the server asking for your password), edit /etc/ssh/ssh_config and add:
To use this key with ssh, you need to tell the server to accept the key. Login to the server and run:
$ cd ~/
$ cat id_rsa.pub >> .ssh/authorized_keys
To install git, you can use RVM’s very handy install script. Please note that by using this script, you put your computer in the hands of a script downloaded from the internet. Do not blame me if something goes terribly wrong. That said, the script is very useful, and you can read it in plain text by pointing your browser to the url in the command below. When you are comfortable running the script, execuse as follows:
$ sudo bash < <( curl -s https://rvm.beginrescueend.com/install/git )
Create a user called git – see Adding a non-root user in Linux.
Put your public rsa key in git’s home folder, e.g.:
Log in as user git and run:
$ git clone git://github.com/sitaramc/gitolite
$ gl-setup ~/id_rsa.pub
You should not have to change the settings, so just hit ctrl-x, write :q and hit enter to quit the editor.
Unless you have already associated your rsa key with the server, you have to do so now. See Create an RSA key and associate it with a server.
You must clone the gitolite-admin-repository to add repositories and users. Changes will take effect once you push the changes. Run:
$ cd /var
$ git clone git@<server>:gitolite-admin
conf/gitolite.conf to add a new repository and push the changes:
$ cd /var/gitolite-admin
$ git commit -am "Added new repo"
$ git push origin master
You can now clone your new repository the same way you cloned gitolite-admin.
Read more here: http://sitaramc.github.com/gitolite/
Install Ruby Version Manager (RVM)
For comprehensive documentation, visit http://beginrescueend.com/
I like to use the RVM install script. Note that it must not be run directly as root. Instead, it must be run as a user with sudo abilities. The system should come with a non-root user by default, but some VPS-systems does not. For instructions on how to add a user to the system, see Adding a non-root user in Linux.
Before running the script, please read the warning under Install Git, as the same applies here.
As a sudo capable user, enter the following to install RVM for all users on the machine:
$ sudo bash < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer )
$ sudo apt-get update
$ sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion
Now close your terminal window or log out of the ssh-session. Log back in and run:
$ type rvm | head -1
This should answer back that:
rvm is a function
If it does, the installation was a success.
Check if there are any dependencies you still need to fill by running:
$ rvm requirements
Now you should be good to go.
Note: When working with rvm, do not use sudo. If rvm needs sudo access, you must run rvmsudo, which will pass sudo access on to any commands that needs it.
To install Ruby 1.9.2 run:
$ rvm install 1.9.2
RVM comes pre-equipped with RubyGems, so you do not have to install it separately. But you do want to create a “gemset” for this version of Ruby and the version of Rails that will be running on it:
rvm gemset create rails3.1.1
Then set RVM to use Ruby 1.9.2 and your new gemset per default:
$ rvm use email@example.com --default
This guide is pretty comprehensive: http://railsapps.github.com/installing-rails-3-1.html
To update all installed gems, run:
$ rvm 1.9.2 do gem 'update'
This should at least update the rake gem.
Now you can run:
$ gem install rails
and it should install the latest stable version of Rails, currently 3.1.1.
Make a home for your coming Rails’ apps:
$ sudo mkdir /var/rails
Check out a Gitolite repository to work on:
$ cd /var/rails
$ git clone git@<server>:my_new_app
Create a new Rails app:
$ rails new my_new_app
This details installing nginx on Ubuntu. For other systems, please visit http://wiki.nginx.org/Install
Edit your /etc/apt/sources.list and add the following line:
deb http://nginx.org/packages/ubuntu/ lucid nginx
$ sudo apt-get update
$ sudo apt-get install nginx
There is a lot to configuring nginx. Please check the following links:
Thin is the stuff that actually serves your Ruby. Nginx just delegates any requests for Ruby files to Thin.
To install Thin, run:
$ gem install thin
and then run
$ bundle install
Make Thin start at boot:
When using RVM, Thin must be started through RVM, and therefore the usual method needs some additions. Start with:
$ thin install
$ sudo /usr/sbin/update-rc.d -f thin defaults
$ thin config -C /etc/thin/<appname>.yml -c /var/rails/<appdir> --servers 3 -p <portnumber>
Generate an RVM wrapper:
$ rvm wrapper firstname.lastname@example.org bootup thin
You might have to edit the DAEMON variable in /etc/init.d/thin. It should say something like this:
To start Thin, reboot or run:
$ sudo service thin start
To restart Thin without rebooting the server, enter:
$ sudo service thin restart
If you get a “502 Bad Gateway” from Nginx when trying to reach the site, Nginx can not talk to Thin. Make sure Thin is running on the right ports and double check your Nginx config.
Installing and running Autotest:
$ gem install autotest
$ gem install autotest-ruby-pure
To run, just cd to Rails root and run:
If RSpec is installed, Autotest should detect this automatically.
Deploying to Heroku:
To deploy to Heroku, the gem “pg” must be added to the Gemfile:
group :production do
# gems specifically for Heroku go here
# Skip attempting to install the pg gem
$ bundle install --without production
Using jQuery with Rails 3.1.1
couldn't find file 'jquery'
couldn't find file 'jquery_ujs'
Adding a non-root user in Linux
If you don’t have a non-root user, you are obviously working as root already, so no sudo required.
Substitute “new_user” with your desired new username.
$ adduser new_user
Enter password when asked. To add the new user to the list of sudoers run visudo as root (can only be run as root, not using sudo):
visudo should start in command mode. Press i to enter insert mode. Find the line:
root ALL=(ALL) ALL
and enter a new line for the new user below it, so that it looks like this:
root ALL=(ALL) ALL
new_user ALL=(ALL) ALL
Press esc to enter command mode. Enter :wq to write the changes to disk and quit.