Install and Deploy Rails on CentOS

prerequisites:

I cover all these operations on CentOS 6.4 and with root, so if you encounter some privilege problem, try sudo. And, if using Ubuntu, you needn’t worry about SELinux.

1. install essentical library

yum update
yum install gcc g++ make automake autoconf curl-devel openssl-devel zlib-develhttpd-devel apr-devel apr-util-devel sqlite-devel gcc-c++

then compile and install nodejs

wget http://nodejs.org/dist/v0.10.7/node-v0.10.7.tar.gz
# then compile and install it

2. install libyaml(needed by ruby)

wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz
tar xzvf yaml-0.1.4.tar.gz
cd yaml-0.1.4
./configure
make
make install

3. install ruby

wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz
# compile and install
ruby –v # check ruby installed correctly

4. install rubygems

wget  http://production.cf.rubygems.org/rubygems/rubygems-2.0.3.tgz
tar vxzf rubygems-2.0.3.tgz
cd rubygems-2.0.3.tgz
ruby setup.rb
gem –v

5. install rails

gem update
gem update --system
gem install rails –V  #It really costs a longtime, enjoy a coffee now

Next,we talk about deploy on centos

6. install passenger(follow the instructions to install extra lib)

gem  install passenger
passenger-install-apache2-module

P.S. ==>install passenger & compile nginx

passenger-install-nginx-module

P.S. install passenger & compile nginx<==

7. find the apache configure

apachectl  –V | grep HTTPD_ROOT
apachectl  –V | grep SERVER_CONFIG_FILE

Add code snippet below to apache config file

<VirtualHost  *:80>
      ServerName   test.com
      DocumentRoot  /var/www/html/blog/public   
      <Directory  /var/www/html/blog/public>
         Allow from all
         AllowOverride all
         Options -MultiViews
      </Directory>
</VirtualHost>

P.S. ==>for nginx

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   server {
      listen 80;
      server_name www.yourhost.com;
      root /somewhere/public;   # <--- be sure to point to 'public'!
      passenger_enabled on;
   }

Add this for development mode in http{ node.

passenger_app_env development;

P.S. for nginx end<==

If something’s wrong, add line below then try again

NameVirtualHost  *:80

8. config mysql database(if you use sqlite,skip this step)

If you use mysql in production, add below to gemfile

group:production do
    gem ‘mysql2’
end

Then bundle install

bundle install

Config mysql

mysql–u root –p # login to mysqlserver
mysql>create database depot_production character set utf8;
mysql>grant all privileges on depot_production.*
mysql>to ‘username’@’localhost’ identified by ‘password’;
mysql>exit;

Modify the config/database.yml

production:
     adapter: mysql2
     encoding: utf8
     reconnect: false
     database: depot_production
     pool: 5
     username: username
     password: password
     host: localhost

9. apply your migrations

rake db:setup RAILS_ENV='production'

10. precompile the static resources

bundle exec rake assets:precompile RAILS_ENV='production'

On centos, we must change selinux’s behavior(Everytime you deploy!)

11. Temporarily go into SELinux permissive mode

setenforce  0

12. restart apache

apachectl restart

13. use your rails app for a while

14. allow passenger run with selinux

Note: if can’t find audit2allow, you should install it first, otherwise you can skip 2 commands below

yum  provides  \*/audit2allow
yum  install  policycoreutils-python
grep httpd  /var/log/audit/audit.log | audit2allow -M passenger

install newly created selinux module

semodule  -i passenger.pp

15. switch selinux back to enforcing mode

setenforce 1
rails
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