Class: Terrafying::Components::Ignition

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

Constant Summary collapse

UNIT_REQUIRED_KEYS = 
[:name].freeze
FILE_REQUIRED_KEYS = 
i[path mode contents].freeze

Class Method Summary collapse

Class Method Details

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



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# File 'lib/terrafying/components/ignition.rb', line 12

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 = "      After=\#{require_units}\n      Requires=\#{require_units}\n    EOF\n  end\n\n  docker_options = []\n\n  if options[:environment_variables].count > 0\n    docker_options += options[:environment_variables].map do |var|\n      \"-e \#{var}\"\n    end\n  end\n\n  if options[:volumes].count > 0\n    docker_options += options[:volumes].map do |volume|\n      \"-v \#{volume}\"\n    end\n  end\n\n  docker_options << '--net=host' if options[:host_networking]\n\n  docker_options << '--privileged' if options[:privileged]\n\n  docker_options_str = \" \\\\\\n\" + docker_options.join(\" \\\\\\n\")\n\n  if options[:arguments].count > 0\n    arguments = \" \\\\\\n\" + options[:arguments].join(\" \\\\\\n\")\n  end\n\n  {\n    name: \"\#{name}.service\",\n    contents: <<~EOF\n      [Install]\n      WantedBy=multi-user.target\n\n      [Unit]\n      Description=\#{name}\n      \#{require}\n\n      [Service]\n      ExecStartPre=-/usr/bin/docker rm -f \#{name}\n      ExecStart=/usr/bin/docker run --name \#{name} \#{docker_options_str} \\\n      \#{image} \#{arguments}\n      Restart=always\n      RestartSec=30\n\n    EOF\n  }\nend\n"

.generate(options = {}) ⇒ Object 



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# File 'lib/terrafying/components/ignition.rb', line 75

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

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

  unless options[:units].all? { |u| u.key?(:contents) || u.key?(:dropins) || u.fetch(:enabled, true) == false || u.fetch(:mask, false) == true }
    raise 'All enabled unmasked units have to have contents and/or dropins'
  end

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

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