Class: DreamOps::SoloDeployer

Inherits:
BaseDeployer show all
Defined in:
lib/dream-ops/deployment/solo.rb

Instance Method Summary collapse

Methods inherited from BaseDeployer

#__bail_with_fatal_error, #__get_cookbook_paths, #build_cookbook, #cleanup_cookbooks, #deploy, deployer_method

Instance Method Details

#__cookbook_in_array(cb, cookbooks) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 6

def __cookbook_in_array(cb, cookbooks)
  return cookbooks.any? {|c| c[:name] == cb[:name]}
end

#__cookbook_was_updated(target, cookbooks) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 10

def __cookbook_was_updated(target, cookbooks)
  return cookbooks.any? {|c| c[:targets].include? target }
end

#__wait_for_pid(pid) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 14

def __wait_for_pid(pid)
  while true do
    begin
      Timeout.timeout(5) do
        Process.wait pid
      end
      print "\b"
      return $?.exitstatus == 0
    rescue Timeout::Error
      print "\r#{@@spinner.next}"
    end
  end
end

#analyze(targets) ⇒ Hash

Analyze the SSH hosts for deployment

Returns:

  • (Hash) —

    a hash containing cookbooks that need to be built/updated and deploy targets

    Example:

    {
  :cookbooks => [
    {
      :bucket => "chef-app",
      :cookbook_filename => "chef-app-dev.tar.gz",
      :sha_filename => "chef-app-dev_SHA.txt",
      :name => "chef-app",
      :path => "./chef",
      :local_sha => "7bfa19491170563f422a321c144800f4435323b1",
      :targets => [ "[email protected]" ]
    }
  ],
  deploy_targets: [
    {
      :host => "[email protected]"
      :remote_sha => ""
    }
  ]
}



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# File 'lib/dream-ops/deployment/solo.rb', line 54

def analyze(targets)
  @ssh_opts = "-i #{DreamOps.ssh_key} -o LogLevel=ERROR -o StrictHostKeyChecking=no"
  @q_all = "> /dev/null 2>&1"
  @q_stdout = "> /dev/null"

  # Collect and print target info
  result = { cookbooks: [], deploy_targets: [] }
  targets.each do |target|
    target_result = analyze_target(target)
    # Add the target to the deploy targets
    result[:deploy_targets] << target_result[:deploy_target]
    # Determine whether the cookbook needs to be built
    cbook = target_result[:cookbook]
    if !cbook.nil? && !cbook[:local_sha].nil?
      # We only build the cookbook if we don't have this version remotely
      if target_result[:deploy_target][:remote_sha] != cbook[:local_sha]
        # Don't build the same destination cookbook more than once
        if !__cookbook_in_array(cbook, result[:cookbooks])
          cbook[:targets] = [target]
          result[:cookbooks] << cbook
        else
          # Add target to be deployed to
          cbook_index = result[:cookbooks].index { |c| c[:name] == cbook[:name] }
          result[:cookbooks][cbook_index][:targets] << target
        end
      end
    end
  end

  return result
end

#analyze_target(target) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 86

def analyze_target(target)
  # Validate SSH creds
  if DreamOps.ssh_key.empty?
    __bail_with_fatal_error(NoSshKeyError.new())
  end
  hostname = `ssh #{@ssh_opts} #{target} sudo hostname 2>&1`.chomp
  if ! $?.success?
    __bail_with_fatal_error(InvalidSshKeyError.new(target, hostname))
  end

  DreamOps.ui.info "Target: #{hostname}"

  result = { host: target }
  cookbook = { }
  cookbooks = __get_cookbook_paths()

  # For now we only handle if we find one cookbook
  if cookbooks.length == 1
    path = cookbooks[0]
    loader = Chef::Cookbook::CookbookVersionLoader.new(path)
    loader.load_cookbooks
    cookbook_version = loader.cookbook_version
    metadata = cookbook_version.metadata

    cookbook[:sha_filename] = "#{metadata.name}_SHA.txt"
    cookbook[:cookbook_filename] = "#{metadata.name}.tar.gz"
    cookbook[:name] = metadata.name
    cookbook[:path] = path
    cookbook[:local_sha] = `git log --pretty=%H -1 #{cookbook[:path]}`.chomp

    `ssh #{@ssh_opts} #{target} sudo mkdir -p /var/chef/cookbooks`

    if system("ssh #{@ssh_opts} #{target} stat /var/chef/#{cookbook[:sha_filename]} #{@q_all}")
      result[:remote_sha] = `ssh #{@ssh_opts} #{target} cat /var/chef/#{cookbook[:sha_filename]}`.chomp
    else
      result[:remote_sha] = ""
    end
  elsif cookbooks.length > 1
    DreamOps.ui.warn "Found more than one cookbook at paths #{cookbooks}.  Skipping build."
    cookbook[:name] = "???"
  else
    DreamOps.ui.warn "No cookbook found"
    cookbook[:name] = "???"
  end

  suffix = if cookbook[:local_sha] != result[:remote_sha] then "(outdated)" else "(up to date)" end
  DreamOps.ui.info "--- Cookbook: #{cookbook[:name]} #{suffix}"

  return { deploy_target: result, cookbook: cookbook }
end

#deploy_cookbook(cookbook) ⇒ Object

Deploys cookbook to server



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# File 'lib/dream-ops/deployment/solo.rb', line 138

def deploy_cookbook(cookbook)
  cookbook[:targets].each do |target|
    if system("scp #{@ssh_opts} #{cookbook[:cookbook_filename]} #{target}:/tmp #{@q_all}")
      `ssh #{@ssh_opts} #{target} sudo rm -rf /var/chef/cookbooks/* #{@q_all}`
      `ssh #{@ssh_opts} #{target} sudo tar -xzvf /tmp/#{cookbook[:cookbook_filename]} -C /var/chef/cookbooks #{@q_all}`
      `ssh #{@ssh_opts} #{target} sudo rm -rf /tmp/#{cookbook[:cookbook_filename]} #{@q_all}`
    else
      DreamOps.ui.error "Failed to copy cookbook to host '#{target}'"
    end

    if !system(
      "ssh #{@ssh_opts} #{target} "+
      "\"echo '#{cookbook[:local_sha]}' | sudo tee /var/chef/#{cookbook[:sha_filename]}\" #{@q_all}"
    )
      DreamOps.ui.error "Failed to update remote cookbook sha"
    end
  end
end

#deploy_target(target, cookbooks) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 185

def deploy_target(target, cookbooks)
  # Bail if chef-solo is not installed
  if !system("ssh #{@ssh_opts} #{target[:host]} which chef-solo #{@q_all}")
    __bail_with_fatal_error(ChefSoloNotInstalledError.new(target[:host]))
  end

  # Bail if chef.json doesn't exist
  if !system("ssh #{@ssh_opts} #{target[:host]} stat /var/chef/chef.json #{@q_all}")
    __bail_with_fatal_error(ChefJsonNotFoundError.new(target[:host]))
  end

  # Bail if setup.json doesn't exist
  if !system("ssh #{@ssh_opts} #{target[:host]} stat /var/chef/roles/setup.json #{@q_all}")
    __bail_with_fatal_error(RoleNotFoundError.new(target[:host], "setup"))
  end

  # Bail if deploy.json doesn't exist
  if !system("ssh #{@ssh_opts} #{target[:host]} stat /var/chef/roles/deploy.json #{@q_all}")
    __bail_with_fatal_error(RoleNotFoundError.new(target[:host], "deploy"))
  end

  # If this stack has a new cookbook, re-run the setup role
  if (
    __cookbook_was_updated(target[:host], cookbooks) ||
    DreamOps.force_setup
  )
    DreamOps.ui.info "...Running setup role [target=\"#{target[:host]}\"]"
    run_chef_role(target, "setup")
  end

  DreamOps.ui.info "...Running deploy role [target=\"#{target[:host]}\"]"
  run_chef_role(target, "deploy")
end

#run_chef_role(target, role) ⇒ Object 



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# File 'lib/dream-ops/deployment/solo.rb', line 157

def run_chef_role(target, role)
  if !system("ssh #{@ssh_opts} #{target[:host]} stat /var/log/chef #{@q_all}")
    `ssh #{@ssh_opts} #{target[:host]} sudo mkdir -p /var/log/chef`
  end

  uuid = SecureRandom.uuid

  chef_cmd = "cinc-solo"
  if !system("ssh #{@ssh_opts} #{target[:host]} which cinc-solo #{@q_all}")
    chef_cmd = "chef-solo --chef-license accept"
  end

  pid = fork do
    if ! system(
      "ssh #{@ssh_opts} #{target[:host]} \"" +
        "set -o pipefail && " +
        "sudo #{chef_cmd} -j /var/chef/chef.json -o \"role[#{role}]\" 2>&1 | sudo tee /var/log/chef/#{uuid}.log #{@q_all}\""
    )
      exit 1
    end
    exit 0
  end

  if !__wait_for_pid(pid)
    __bail_with_fatal_error(ChefSoloFailedError.new(target[:host], "/var/log/chef/#{uuid}.log"))
  end
end