Why I prefer Mina over Capistrano?
While Capistrano is a really really great tool , it is terribly slow. Since time is money for every one of us, I wanted a tool that would not be so painfully slow and easy to use, you know , that get shits done. Then I met Mina and instantly fell in love with it when I browsed its homepage and read its slogan "Really fast deployer and server automation tool" .
Before I was using any deployment tools I was manually ssh`ing into my server and then cloning the repo from the git then running bundle install , rake db:migrate and a lot of stuffs that is not very interesting to do repeatedly. If I had pushed any new updates to the repo I would have to ssh into the server and do the same thing which is time consuming as well as not very productive. So I highly reckon anyone who is not using deployment tools to use it and feel its power. But remember Great power comes with Great responsibility. :)
It is dead simple to get started with Mina. All you have to do is add a gem run the bundler, create a deploy.rb file , fill the right info in it and running mina deploy. The best part is you can write rake tasks in deploy.rb.
Either run gem install mina or add mina gem in your gemfile.
Run bundle install if you chose the later option.
run mina init in your working directory
Here is my deploy.rb file
require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
# Basic settings:
# domain - The hostname to SSH to.
# deploy_to - Path to deploy into.
# repository - Git repo to clone from. (needed by mina/git)
# branch - Branch name to deploy. (needed by mina/git)
set :user, 'ubuntu'
set :domain, 'www.fuitter.com'
set :deploy_to, '/usr/share/nginx/html/fuitter'
set :repository, 'git@bitbucket.org:mc_cannibal/fuitter2.git'
set :branch, 'master'
set :forward_agent, true
# Manually create these paths in shared/ (eg: shared/config/database.yml) in your server.
# They will be linked in the 'deploy:link_shared_paths' step.
set :shared_paths, ['config/database.yml', 'config/secrets.yml', 'log']
# Optional settings:
# set :user, 'foobar' # Username in the server to SSH to.
# set :port, '30000' # SSH port number.
# set :forward_agent, true # SSH forward_agent.
# This task is the environment that is loaded for most commands, such as
# `mina deploy` or `mina rake`.
task :environment do
ruby_version = File.read('.ruby-version').strip
raise "Couldn't determine Ruby version: Do you have a file .ruby-version in your project root?" if ruby_version.empty?
queue %{
source /home/ubuntu/.rvm/bin/rvm
rvm use #{ruby_version} || exit 1
}
end
task :setup => :environment do
queue! %[mkdir -p "#{deploy_to}/#{shared_path}/log"]
queue! %[chmod g+rx,u+rwx "#{deploy_to}/#{shared_path}/log"]
queue! %[mkdir -p "#{deploy_to}/#{shared_path}/config"]
# Add the repository server to .ssh/known_hosts
if repository
repo_host = repository.split(%r{@|://}).last.split(%r{:|\/}).first
repo_port = /:([0-9]+)/.match(repository) && /:([0-9]+)/.match(repository)[1] || '22'
queue! %[
if ! ssh-keygen -H -F #{repo_host} &>/dev/null; then
ssh-keyscan -t rsa -p #{repo_port} -H #{repo_host} >> ~/.ssh/known_hosts
fi
]
end
# Create database.yml for Postgres if it doesn't exist
path_database_yml = "#{deploy_to}/#{shared_path}/config/database.yml"
database_yml = %[production:
database: fuitter
adapter: postgresql
pool: 5
timeout: 5000]
queue! %[ test -e #{path_database_yml} || echo "#{database_yml}" > #{path_database_yml} ]
# Create secrets.yml if it doesn't exist
path_secrets_yml = "#{deploy_to}/#{shared_path}/config/secrets.yml"
secret =
secrets_yml = %[production:
secret_key_base:
#{`rake secret`.strip}]
queue! %[ test -e #{path_secrets_yml} || echo "#{secrets_yml}" > #{path_secrets_yml} ]
queue! %[chmod g+rx,u+rwx,o-rwx "#{deploy_to}/#{shared_path}/config"]
end
desc "Deploys the current version to the server."
task :deploy => :environment do
to :before_hook do
# Put things to run locally before ssh
end
deploy do
# Put things that will set up an empty directory into a fully set-up
# instance of your project.
invoke :'git:clone'
invoke :'deploy:link_shared_paths'
invoke :'bundle:install'
invoke :'rails:db_migrate'
invoke :'rails:assets_precompile'
invoke :'deploy:cleanup'
to :launch do
# queue "mkdir -p #{deploy_to}/#{current_path}/tmp/"
# queue "service #{user} restart"
end
end
end
# For help in making your deploy script, see the Mina documentation:
#
# - http://nadarei.co/mina
# - http://nadarei.co/mina/tasks
# - http://nadarei.co/mina/settings
# - http://nadarei.co/mina/helpers
then run mina setup and finally mina deploy.
That is all there is to it.
