Class: JackAndTheElasticBeanstalk::EB::Environment

Inherits:
Object
  • Object
show all
Defined in:
lib/jack_and_the_elastic_beanstalk/eb.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(application_name:, logger:, client:, environment_name:) ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 67

def initialize(application_name:, logger:, client:, environment_name:)
  @application_name = application_name
  @logger = logger
  @client = client
  @environment_name = environment_name
  @timeout = 600
end

Instance Attribute Details

#application_name ⇒ Object (readonly)

Returns the value of attribute application_name.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 61

def application_name
  @application_name
end

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 63

def client
  @client
end

#environment_name ⇒ Object (readonly)

Returns the value of attribute environment_name.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 64

def environment_name
  @environment_name
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 62

def logger
  @logger
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 65

def timeout
  @timeout
end

Instance Method Details

#configuration_setting ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 90

def configuration_setting
  @configuration_setting ||= client.describe_configuration_settings(application_name: application_name, environment_name: environment_name).configuration_settings.first
end

#data ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 84

def data
  @data ||= client.describe_environments(application_name: application_name).environments.find {|env|
    env.environment_name == environment_name
  }
end

#data=(v) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 80

def data=(v)
  @data = v
end

#deploy(label:) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 245

def deploy(label:)
  client.update_environment(environment_id: environment_id,
                            version_label: label)
end

#destroy ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 223

def destroy
  logger.info("jeb::eb") { "Terminating #{environment_name}..." }
  client.terminate_environment(environment_id: environment_id)
end

#ensure_version!(expected_label:) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 250

def ensure_version!(expected_label:)
  unless data.version_label == expected_label
    raise "Unexpected version label: expected=#{expected_label}, actual=#{data.version_label}"
  end
end

#env_vars ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 94

def env_vars
  configuration_setting.option_settings.each.with_object({}) do |option, hash|
    if option.namespace == "aws:elasticbeanstalk:application:environment"
      hash[option.option_name] = option.value
    end
  end
end

#environment_id ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 219

def environment_id
  data.environment_id
end

#health ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 228

def health
  logger.info("jeb::eb") { "Downloading health data on #{environment_name}..." }

  client.describe_environment_health(environment_id: environment_id, attribute_names: ["All"])
end

#refresh ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 75

def refresh
  @data = nil
  @configuration_setting = nil
end

#resources ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 234

def resources
  logger.info("jeb::eb") { "Downloading resources on #{environment_name}..."}

  client.describe_environment_resources(environment_id: environment_id)
end

#restart ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 240

def restart
  logger.info("jeb::eb") { "Restarting #{environment_name}..." }
  client.restart_app_server(environment_id: environment_id)
end

#scale ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 177

def scale
  option_settings = configuration_setting.option_settings

  min = option_settings.find {|option| option.namespace == "aws:autoscaling:asg" && option.option_name == "MinSize" }.value.to_i
  max = option_settings.find {|option| option.namespace == "aws:autoscaling:asg" && option.option_name == "MaxSize" }.value.to_i

  min...max
end

#set_env_vars(env) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 102

def set_env_vars(env)
  need_update = env.all? {|key, value|
    if value
      env_vars[key] == value
    else
      !env_vars.key?(key)
    end
  }

  if need_update
    logger.info("jeb::eb") { "Env vars looks like identical; skip" }
  else
    logger.info("jeb::eb") { "Updating environment variables" }

    options_to_update = []
    options_to_remove = []

    env.each do |key, value|
      if value
        options_to_update << {
          namespace: "aws:elasticbeanstalk:application:environment",
          option_name: key.to_s,
          value: value.to_s
        }
      else
        options_to_remove << {
          namespace: "aws:elasticbeanstalk:application:environment",
          option_name: key.to_s
        }
      end
    end

    client.update_environment(application_name: application_name,
                              environment_name: environment_name,
                              option_settings: options_to_update,
                              options_to_remove: options_to_remove)

    refresh
  end
end

#set_scale(scale) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 190

def set_scale(scale)
  if scale.is_a?(Integer)
    scale = scale...scale
  end

  if self.scale == scale
    logger.info("jeb::eb") { "New scale is identical to current scale; skip" }
  else
    logger.info("jeb::eb") { "Scaling to #{scale}" }

    client.update_environment(application_name: application_name,
                              environment_name: environment_name,
                              option_settings: [
                                {
                                  namespace: "aws:autoscaling:asg",
                                  option_name: "MinSize",
                                  value: scale.begin.to_s
                                },
                                {
                                  namespace: "aws:autoscaling:asg",
                                  option_name: "MaxSize",
                                  value: scale.end.to_s
                                }
                              ])

    refresh
  end
end

#status ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 186

def status
  data.status
end

#synchronize_update(timeout: self.timeout) ⇒ Object 



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# File 'lib/jack_and_the_elastic_beanstalk/eb.rb', line 143

def synchronize_update(timeout: self.timeout)
  logger.info("jeb::eb") { "Synchronizing update started... (timeout = #{timeout})" }

  yield if block_given?

  start = Time.now
  wait = 1

  while true
    refresh
    st = status

    logger.info("jeb::eb") { "#{environment_name}:: status=#{st}" }

    case st
    when "Ready"
      break
    when "Updating", "Launching", "Aborting"
      # ok
    else
      raise "Unexpected status: #{st}"
    end

    if Time.now - start > timeout
      raise "Timeout exceeded"
    end

    sleep wait
    wait = [wait*2, 30].min
  end

  logger.info("jeb::eb") { "Synchronized in #{(Time.now - start).to_i} seconds" }
end