install_Rails4_postgresql_Centos7

--- NOTE: '$' means looged as a normal S.O. user and '#' means looged as root.


--- Following the instruction from:   https://sharadchhetri.com/how-to-easily-install-ruby-2-1-0-in-centos-and-rhel/


1) Install RVM: 

$ curl -L get.rvm.io | bash -s stable


2) To install Ruby 2.1.2, open a new normal session to load the /etc/profile.d/rvm.sh script:

$ which rvm
~/.rvm/bin/rvm

$ rvm requirements
Checking requirements for centos.
Requirements installation successful.

$ rvm install 2.1.2
. . .
Install of ruby-2.1.2 - #complete 

$ rvm use 2.1.2 --default
Using /home/rg/.rvm/gems/ruby-2.1.2

$ ruby -v
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]



--- Following the instructions from:   https://www.softwarecollections.org/en/scls/rhscl/rh-nodejs10/


3) Install Node.js v10:

# yum install centos-release-scl-rh

# yum install rh-nodejs10


4) To enable the Node.js v10 Software Collection, update the /etc/profile.d/rvm.sh:

# echo "
export PATH=${PATH}:/opt/rh/rh-nodejs10/root/usr/bin
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/opt/rh/rh-nodejs10/root/usr/lib64
export PYTHONPATH=${PYTHONPATH}:/opt/rh/rh-nodejs10/root/usr/lib/python2.7/site-packages
export MANPATH=${MANPATH}:/opt/rh/rh-nodejs10/root/usr/share/man
source scl_source enable rh-nodejs10
rvm --default use 2.1.2 >/dev/null" >> /etc/profile.d/rvm.sh


$ node -v
v10.21.0

$ npm -v
6.14.4


5) Avoid to install documentation for every gem:

$ echo "gem: --no-document" >> ~/.gemrc

$ gem -v
3.0.9



--- Following the instructions from:   https://www.server-world.info/en/note?os=CentOS_7&p=rails4


6) Install the RPM needed for bundler and Rails:

# yum --enablerepo=epel,centos-sclo-rh -y install rh-ruby22-ruby-devel libuv gcc make libxml2 libxml2-devel mariadb-devel zlib-devel libxslt-devel 


7) Install the proper bundler gem:

$ gem install bundler -v 1.17.3
Fetching bundler-1.17.3.gem
Successfully installed bundler-1.17.3
1 gem installed


8) Install needed gems:

$ gem install nokogiri -- --use-system-libraries
Fetching mini_portile2-2.4.0.gem
Fetching nokogiri-1.9.1.gem
Successfully installed mini_portile2-2.4.0
Building native extensions with: '--use-system-libraries'
This could take a while...
Successfully installed nokogiri-1.9.1
2 gems installed

$ gem install minitest -v 5.12.0
ng minitest-5.12.0.gem
Successfully installed minitest-5.12.0
1 gem installed

$ gem install rack -v 1.6.13
Fetching rack-1.6.13.gem
Successfully installed rack-1.6.13
1 gem installed

$ gem install sprockets -v 3.7.2
Fetching sprockets-3.7.2.gem
Successfully installed sprockets-3.7.2
1 gem installed

$ gem install pg -v 1.1.4
Fetching pg-1.1.4.gem
Building native extensions. This could take a while...
Successfully installed pg-1.1.4
1 gem installed


9) Install Rails 4:

$ gem install rails --version="~>4.0" -- --no-ri --no-rdoc
Fetching thread_safe-0.3.6.gem
Fetching loofah-2.9.0.gem
. . .
Successfully installed sprockets-rails-3.2.2
Successfully installed rails-4.2.11.3
19 gems installed

$ rails -v
Rails 4.2.11.3



--- Following the instructions from:   https://www.howtoforge.com/tutorial/how-to-install-and-use-ruby-on-rails-with-postgresql-on-centos-7/


10) Install PostGreSQL:

# yum -y install postgresql-server postgresql-devel postgresql-contrib

# postgresql-setup initdb

# vim /var/lib/pgsql/data/pg_hba.conf
. . .

# systemctl start postgresql

# passwd postgres
... postgres

$ su - postgres
  psql
  create role rails_dev with createdb login password 'aqwe123';
  \du
                               Lista de roles
 Nombre de rol |                   Atributos                    | Miembro de 
---------------+------------------------------------------------+------------
 postgres      | Superusuario, Crear rol, Crear BD, Replicación | {}
 rails_dev     | Crear BD                                       | {}

  Ctrl+D
Ctrl+D
$