Class: Terrafying::Components::Ignition

Inherits:
Object
  • Object
show all
Defined in:
lib/terrafying/components/ignition.rb

Constant Summary collapse

UNIT_REQUIRED_KEYS = 
[:name]
FILE_REQUIRED_KEYS = 
[:path, :mode, :contents]

Class Method Summary collapse

Class Method Details

.container_unit(name, image, options = {}) ⇒ Object 



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# File 'lib/terrafying/components/ignition.rb', line 13

def self.container_unit(name, image, options={})
  options = {
    volumes: [],
    environment_variables: [],
    arguments: [],
    require_units: [],
    host_networking: false,
    privileged: false,
  }.merge(options)

  if options[:require_units].count > 0
    require_units = options[:require_units].join(" ")
    require = <<EOF
After=#{require_units}
Requires=#{require_units}
EOF
  end

  docker_options = []

  if options[:environment_variables].count > 0
    docker_options += options[:environment_variables].map { |var|
      "-e #{var}"
    }
  end

  if options[:volumes].count > 0
    docker_options += options[:volumes].map { |volume|
      "-v #{volume}"
    }
  end

  if options[:host_networking]
    docker_options << "--net=host"
  end

  if options[:privileged]
    docker_options << "--privileged"
  end

  docker_options_str = " \\\n" + docker_options.join(" \\\n")

  if options[:arguments].count > 0
    arguments = " \\\n" + options[:arguments].join(" \\\n")
  end

  {
    name: "#{name}.service",
    contents: <<EOF
[Install]
WantedBy=multi-user.target

[Unit]
Description=#{name}
#{require}

[Service]
ExecStartPre=-/usr/bin/docker rm -f #{name}
ExecStart=/usr/bin/docker run --name #{name} #{docker_options_str} \
#{image} #{arguments}
Restart=always
RestartSec=30

EOF
  }
end

.generate(options = {}) ⇒ Object 



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# File 'lib/terrafying/components/ignition.rb', line 80

def self.generate(options={})
  options = {
    keypairs: [],
    volumes: [],
    files: [],
    units: [],
    ssh_group: "cloud",
    disable_update_engine: false,
    region: Terrafying::Generator.aws.region,
  }.merge(options)

  if ! options[:units].all? { |u| UNIT_REQUIRED_KEYS.all? { |key| u.has_key?(key) } }
    raise "All units require the following keys: #{UNIT_REQUIRED_KEYS}"
  end

  if ! options[:units].all? { |u| u.has_key?(:contents) || u.has_key?(:dropins) }
    raise "All units have to have contents and/or dropins"
  end

  if ! options[:files].all? { |f| FILE_REQUIRED_KEYS.all? { |key| f.has_key?(key) } }
    raise "All files require the following keys: #{FILE_REQUIRED_KEYS}"
  end

  options[:cas] = options[:keypairs].map { |kp| kp[:ca] }.sort.uniq

  erb_path = File.join(File.dirname(__FILE__), "templates/ignition.yaml")
  erb = ERB.new(IO.read(erb_path))

  yaml = erb.result(OpenStruct.new(options).instance_eval { binding })

  Terrafying::Util.to_ignition(yaml)
end