Class: Commands::DeployInstances

Inherits:
Object
  • Object
show all
Defined in:
lib/commands/deploy_instances.rb

Instance Method Summary collapse

Instance Method Details

#options ⇒ Object

holds the options that were passed you can set any initial defaults here



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# File 'lib/commands/deploy_instances.rb', line 6

def options
  @options ||= {
      :migrate_command => '',
      :downtime => false,
      :no_restart => false
  }
end

#register(opts, global_options) ⇒ Object 



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# File 'lib/commands/deploy_instances.rb', line 21

def register(opts, global_options)
  opts.banner = "Usage: deploy [options]"
  opts.description = "Deploy the applications for the specified group"

  opts.on('-g', "--group name", "Required - Name of this deploy group.") do |v|
    options[:group] = v
  end

  opts.on('-t', "--tag tag", "Required - Git tag to use for pulling chef code.") do |v|
    options[:tag] = v
  end

  opts.on('-m', "--migrate [command]", "Migrate command to run.  Does not force downtime, use the --downtime option for that.") do |v|
    options[:migrate_command] = v || 'rake db:migrate'
  end

  opts.on('-d', "--downtime", "If this flag is set we bring the server down and bring up the maint page during the restart phase.") do |v|
    options[:downtime] = v
  end

  opts.on("--no_restart", "Set this if you only want the deploy without a restart, useful for creating AMI images.") do |v|
    options[:no_restart] = v
  end

  opts.on('-f', "--force", "Force a deploy even if the current status says we are deploying.  You should only do this if you are certain the previous deploy is stuck.") do |v|
    options[:force] = v
  end

  opts.on('-p', "--print path", "The directory into which we output the data as a file per host.") do |v|
    options[:result_path] = v
  end
end

#required_options ⇒ Object

required options



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# File 'lib/commands/deploy_instances.rb', line 15

def required_options
  @required_options ||= Set.new [
      :group,
  ]
end

#run(global_options, amazon) ⇒ Object 



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# File 'lib/commands/deploy_instances.rb', line 55

def run(global_options, amazon)
  ec2 = amazon.ec2
  utils = ZZSharedLib::Utils.new(amazon)

  group_name = options[:group]
  migrate_command = options[:migrate_command]
  downtime = options[:downtime]
  app_deploy_tag = options[:tag]
  no_restart = options[:no_restart]

  # first see if already exists
  deploy_group = amazon.find_deploy_group(group_name)

  group_config = deploy_group.config
  gitrepo = group_config[:app_git_url]

  # verify that the chef deploy tag exists
  full_ref = "refs/heads/#{app_deploy_tag}"
  cmd = "git ls-remote #{gitrepo} #{full_ref} | egrep #{full_ref}"
  if ZZSharedLib::CL.do_cmd_result(cmd) != 0
    # now try to see if it's a tag - use the ^{} to follow tags to find the matching non tag object (i.e. the proper checkin that we tagged)
    full_ref = "refs/tags/#{app_deploy_tag}"
    cmd = "git ls-remote #{gitrepo} #{full_ref}^{} #{full_ref} | egrep #{full_ref}"
    if ZZSharedLib::CL.do_cmd_result(cmd) != 0
      raise "Could not find the tag or ref: #{app_deploy_tag} in the remote #{gitrepo} repository."
    end
  end

  deploy_group.app_deploy_tag = app_deploy_tag
  deploy_group.save
  deploy_group.reload # save corrupts the in memory state so must reload, kinda lame


  instances = amazon.find_and_sort_named_instances(group_name)

  # see if already deploying
  if !options[:force]
    # raises an exception if not all in the ready or error state
    utils.check_deploy_state(instances, [:deploy_chef, :deploy_app])
  end


  # tag is good, go ahead and deploy to all the machines in the group
  # this is a two phase operation.  The first pushes the code and preps everything
  # up to the point of a before restart operation.  We then call again to
  # perform the restart.  This ensures that all servers were prepped before
  # we try to restart to minimize the chance of issues.
  BuildDeployConfig.do_app_deploy(utils, amazon, instances, group_name, deploy_group, migrate_command, downtime, no_restart, options[:result_path])
  ui = Printer.new(STDOUT, STDERR, STDIN)
  ui.msg(ui.color("Your app has been successfully deployed - open for business.", :green, :bold, :reverse))

end