Run OpsWorks Stack command on Instance

run_command_on_instance.rb

require 'aws-sdk-v1'
require 'pp'

AWS_KEY_ID = ENV['AWS_KEY_ID']
AWS_SEC_KEY = ENV['AWS_SEC_KEY']

opsw = AWS::OpsWorks.new(access_key_id: AWS_KEY_ID, secret_access_key: AWS_SEC_KEY)
@opsw_cli = opsw.client

def retrieve_stacks(region = nil, stack_prefix_hint = nil)
  response = @opsw_cli.describe_stacks
  stacks = response.data[:stacks]
  stacks = stacks.select do |s|
    (region.nil? || s[:region] == region) &&
      (stack_prefix_hint.nil? || s[:name].start_with?(stack_prefix_hint))
  end
end

def retrieve_instances(stack)
  response = @opsw_cli.describe_instances(stack_id: stack[:stack_id])
  response.data[:instances]
end

def search_instance(hostname, region = nil, stack_prefix_hint = nil)
  retrieve_stacks(region, stack_prefix_hint).each do |stack|
    retrieve_instances(stack).each do |instance|
      return instance if instance[:hostname] == hostname
    end
  end
  nil
end

def run_command(instance, command = :configure)
  option = {
    stack_id: instance[:stack_id],
    command: { name: command.to_s, },
    instance_ids: [
      instance[:instance_id]
    ],
  }
  @opsw_cli.create_deployment(option)
end

# main
hostname = "<target-instancename>"
region = nil
stack_prefix_hint = nil
command = "configure"

instance = search_instance(hostname, region, stack_prefix_hint)
if instance
  puts "Start running a command - hostname:#{hostname} command:#{command}"
  pp run_command(instance, command)
else
  $stderr.puts "Error: Failed to find an instance - #{hostname}"
  exit 1
end