Class: Kontena::Cli::Apps::KontenaYmlGenerator

Inherits:
Object
  • Object
show all
Includes:
Common
Defined in:
lib/kontena/cli/apps/kontena_yml_generator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Common

#abort_on_validation_errors, #app_json, #current_dir, #display_notifications, #generate_services, #hint_on_validation_notifications, #prefixed_name, #project_name_from_yaml, #read_yaml, #require_config_file, #service_exists?, #services_from_yaml, #set_env_variables, #token, #valid_addons

Constructor Details

#initialize(image_name, service_prefix) ⇒ KontenaYmlGenerator

Returns a new instance of KontenaYmlGenerator.



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 9

def initialize(image_name, service_prefix)
  @image_name = image_name
  @service_prefix = service_prefix
end

Instance Attribute Details

#image_name ⇒ Object (readonly)

Returns the value of attribute image_name.



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 7

def image_name
  @image_name
end

#service_prefix ⇒ Object (readonly)

Returns the value of attribute service_prefix.



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 7

def service_prefix
  @service_prefix
end

Instance Method Details

#create_yml(services, filename) ⇒ Object 



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 88

def create_yml(services, filename)
  if File.exist?(filename) && !File.zero?(filename)
    kontena_services = yml_services(File.read(filename))
    services.each do |name, options|
      if kontena_services[name]
        services[name].merge!(kontena_services[name])
      end
    end
  end
  kontena_services = {
    'version' => '2',
    'name' => service_prefix,
    'services' => services
  }
  super(kontena_services, filename)
end

#generate(procfile, addons, env_file) ⇒ Object 



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 55

def generate(procfile, addons, env_file)
  image = image_name || "registry.kontena.local/#{File.basename(Dir.getwd)}:latest"
  if procfile.keys.size > 0
    # generate services found in Procfile
    services = {}
    procfile.keys.each do |name|
      services[name] = {'image' => image}
      services[name]['environment'] = ['PORT=5000'] if app_json && name == 'web' # Heroku generates PORT env variable so should we do too
      services[name]['command'] = "/start #{name}" if name != 'web'
      services[name]['env_file'] = env_file if env_file

      # generate addon services
      addons.each do |addon|
        addon_service = addon.split(":")[0]
        addon_service.slice!('heroku-')
        if valid_addons.has_key?(addon_service)
          services[name]['links'] ||= []
          services[name]['links'] << "#{addon_service}:#{addon_service}"
          services[name]['environment'] ||= []
          services[name]['environment'] += valid_addons(service_prefix)[addon_service]['environment']
          services[addon_service] = {'image' => valid_addons[addon_service]['image'], 'stateful' => true}
        end
      end
    end
  else
    # no Procfile found, create dummy web service
    services = {'web' => { 'image' => image}}
    services['web']['env_file'] = env_file if env_file
  end
  # create kontena.yml file
  create_yml(services, 'kontena.yml')
end

#generate_from_compose_file(docker_compose_file) ⇒ Object 



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 14

def generate_from_compose_file(docker_compose_file)
  services = {}
  # extend services from docker-compose.yml
  file = File.read(docker_compose_file)

  yml_services(file).each do |name, options|
    services[name] = {'extends' => { 'file' => 'docker-compose.yml', 'service' => name }}
    if options.has_key?('build')
      image = image_name || "registry.kontena.local/#{File.basename(Dir.getwd)}:latest"
      services[name]['image'] = image
    end

    # set Heroku addon service as stateful by default
    if valid_addons.has_key?(name)
      services[name]['stateful'] = true
    end

    # we have to generate Kontena urls to env vars for Heroku addons
    # redis://openredis:6379 -> redis://project-name-openredis:6379
    if options['links']
      options['links'].each do |link|
        service_link = link.split(':').first
        if valid_addons.has_key?(service_link)
          services[name]['environment'] ||= []
          services[name]['environment'] += valid_addons(service_prefix)[service_link]['environment']
        end
      end
    end
  end
  create_yml(services, 'kontena.yml')
end

#yml_services(file) ⇒ Object 



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# File 'lib/kontena/cli/apps/kontena_yml_generator.rb', line 46

def yml_services(file)
  yml = ::YAML.safe_load(file)
  if yml['version'] == '2'
    yml['services']
  else
    yml
  end
end