632 lines
20 KiB
Ruby
632 lines
20 KiB
Ruby
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#!/usr/bin/env ruby
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#
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# This script is intended to manage a single AWS EC2 instance for use during
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# pentests. The script offers following functionalities:
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#
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# start - Starts an EC2 instance. If it does not exist, it is to be created
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# stop - Stops the EC2 instance. It does not terminate it.
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# restart - Restarts the EC2 instance
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# terminate - Terminates the EC2 instance.
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# address - Gets an IPv4 address of the EC2 instance. If verbose options is set, will return more FQDN also.
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# status - Checks what is a status of picked EC2 instance.
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# ssh - Opens a ssh connection with specified instance. If it is not running, it is to be created and started.
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# notify - Sends gnome notification using "notify-send" with running instance uptime
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#
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# The basic use case for this script is to have yourself launched an EC2 instance for quick
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# verification of Web Application vulnerabilities like out-of-bound communication: blind-XXE for instance.
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# Everytime you will be in position of needing a machine with public IPv4 address - take this script for a spin,
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# and it will provide you with your own EC2 instance.
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#
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# Requirements:
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# - gem "aws-sdk-ec2"
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#
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# Author: Mariusz B., '19, <mb@binary-offensive.com>
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#
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require 'aws-sdk-ec2'
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require 'base64'
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require 'optparse'
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VERSION = '0.1'
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$aws_config_path = File.join((ENV['OS'] == 'Windows_NT') ? ENV['UserProfile'] : File.expand_path('~'), '.aws')
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$config = {
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#
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# Notably interesting configuration to fill up
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#
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:image_id => 'ami-07360d1b1c9e13198',
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:key_name => 'ec2-pentest-key',
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:sg_name => 'ec2-pentest-usage',
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:instance_name => 'pentestec2',
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:instance_type => 't2.micro',
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:ssh_user => 'ec2-user',
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:ssh_identity_file => File.join($aws_config_path, 'ec2-pentest-key.pem'),
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# ----
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:verbose => false,
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:quiet => false,
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:debug => false,
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:aws_path => "",
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:aws_profile => 'default',
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:region => 'us-east-1',
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}
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$supported_funcs = {
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'start' => 'Starts an EC2 instance. If it does not exist, it is to be created',
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'stop' => 'Stops the EC2 instance. It does not terminate it.',
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'restart' => 'Restarts the EC2 instance',
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'terminate' => 'Terminates the EC2 instance.',
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'address' => 'Gets an IPv4 address of the EC2 instance. If verbose options is set, will return more FQDN also.',
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'status' => 'Checks what is a status of picked EC2 instance.',
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'ssh' => 'Opens a ssh connection with specified instance. If it is not running, it is to be created and started.',
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'notify' => 'Sends gnome notification using "notify-send" with running instance uptime.'
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}
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class Logger
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def Logger._out(x)
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if not $config[:quiet] and ($config[:verbose] or $config[:debug])
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STDOUT.write(x + "\n")
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end
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end
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def Logger.dbg(x)
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if $config[:debug]
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Logger._out("[dbg] #{x}")
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end
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end
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def Logger.info(x)
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Logger._out("[.] #{x}")
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end
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def Logger.fatal(x)
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unless $config[:quiet]
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STDOUT.write(x + "\n")
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end
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exit 1
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end
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def Logger.fail(x)
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Logger._out("[-] #{x}")
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end
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def Logger.ok(x)
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Logger._out("[+] #{x}")
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end
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end
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class AwsEc2Manager
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attr_reader :instance_name
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def initialize(func, instance_name, config)
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@instance_name = instance_name
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@checked = false
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@func = func
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@config = config
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@instance_id = ""
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@instance_id_file = File.join($aws_config_path, instance_name+'_id')
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try_to_load_instance_id
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@aws_access_key_id = ""
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@aws_secret_access_key = ""
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if @config[:aws_profile] != 'default' or not @config[:aws_path].to_s.empty?
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path = @config[:aws_path].to_s.empty? ? $aws_config_path : @config[:aws_path]
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Logger.dbg("Initializing AWS config with creds from path: #{path} - profile: #{@config[:aws_profile]}")
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shared_creds = Aws::SharedCredentials.new(
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path: path,
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profile_name: @config[:aws_profile]
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)
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Aws.config.update({
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credentials: shared_creds
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})
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end
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Aws.config.update({region: @config[:region]})
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@ec2_client = Aws::EC2::Client.new(region: @config[:region])
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@ec2 = Aws::EC2::Resource.new(client: @ec2_client)
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end
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def try_to_load_instance_id
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if File.file? @instance_id_file
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File.open(@instance_id_file) do |f|
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@instance_id = f.gets.strip
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Logger.dbg("Using instance ID: #{@instance_id}")
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end
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else
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Logger.fail("No instance id file: #{@instance_id_file}")
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end
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end
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def get_security_group_id
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group_id = ""
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@ec2_client.describe_security_groups do |security_group|
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if security_group.group_name == @config[:sg_name]
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group_id = security_group.group_id
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break
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end
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end
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group_id
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end
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def try_to_find_instance_id
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Logger.dbg("Trying to find that specific instance online...")
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insts = @ec2.instances({
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filters: [
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{
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name: 'image-id',
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values: [@config[:image_id]]
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},
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{
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name: 'instance-type',
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values: [@config[:instance_type]]
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},
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{
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name: 'tag:name',
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values: [@config[:instance_name]]
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},
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{
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name: 'key-name',
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values: [@config[:key_name]]
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},
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]
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})
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insts.each do |instance|
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Logger.dbg("Checking instance with ID: #{instance.id}")
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if instance.state.code == 48
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Logger.fail("Instance is terminated. Leaving id file empty.")
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File.open(@instance_id_file, 'w') do |f|
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f.puts("")
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end
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@instance_id = ""
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break
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end
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Logger.dbg("Found proper instance: #{instance.id} / #{instance.image_id}. Clobberring id file...")
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@instance_id = instance.id
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File.open(@instance_id_file, 'w') do |f|
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f.puts(instance.id)
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end
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break
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end
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if not insts.any?
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Logger.fail("Did not found any instance matching our criterias.")
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end
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@instance_id
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end
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def get_instance_id
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if @checked and not @instance_id.to_s.empty?
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Logger.dbg("Returning cached checked instance id.")
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elsif not @instance_id.to_s.empty?
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Logger.dbg("Checking if instance with ID = #{@instance_id} still exists.")
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i = @ec2.instance(@instance_id)
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if i.exists?
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Logger.dbg("Instance still exists.")
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@checked = true
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else
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Logger.dbg("Instance does not exist, clearing cached instance id in file.")
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File.open(@instance_id_file, 'w') do |f|
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f.puts("")
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end
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try_to_find_instance_id
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end
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end
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Logger.info("Working on instance: #{@instance_id}")
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@instance_id
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end
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def create(wait: false)
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# group_id = get_security_group_id
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# unless group_id
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# Logger.fatal("Could not obtain EC2 Security Group ID by name: #{@config[:sg_name]}")
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# end
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Logger.dbg(%Q(Creating an instance:
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AMI Image ID: #{@config[:image_id]}
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EC2 Key Name: #{@config[:key_name]}
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Security Group Name: #{@config[:sg_name]}
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))
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# Security Group ID: #{group_id}
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instance = @ec2.create_instances({
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image_id: @config[:image_id],
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min_count: 1,
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max_count: 1,
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key_name: @config[:key_name],
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security_groups: [@config[:sg_name]],
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instance_type: @config[:instance_type],
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tag_specifications: [
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{
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resource_type: 'instance',
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tags: [
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key: 'name',
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value: @config[:instance_name],
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],
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},
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],
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})
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if instance.any?
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Logger.ok("Instance created. Waiting for it to get into running state...")
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else
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Logger.fail("Could not spin up an instance! Something went wrong but will proceed anyway...")
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end
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# Wait for the instance to be created, running, and passed status checks
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inst = instance.first
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if wait
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puts "Waiting for instance to get it up & running. This might take a couple of minutes."
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@ec2.client.wait_until(:instance_status_ok, {instance_ids: [inst.id]})
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else
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Logger.ok("Instance up & initializing.")
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end
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File.open(@instance_id_file, 'w') do |f|
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f.puts(inst.id)
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end
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if @config[:quiet]
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puts "created"
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elsif @config[:verbose] or @config[:debug]
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puts "Created instance: inst.id"
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end
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end
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def start(wait: false)
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state = status(raw: true)
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Logger.info("Instance is in state: #{state}")
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if state == 'notcreated'
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create(wait: wait)
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else
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if get_instance_id.to_s.empty?
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Logger.fatal("No instance that could be started.")
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end
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i = @ec2.instance(@instance_id)
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if i.exists?
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case i.state.code
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when 0 # pending
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puts "#{i.id} is pending, so it will be running in a bit"
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when 16 # started
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puts "#{i.id} is already started"
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when 48 # terminated
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puts "#{i.id} is terminated, gotta create another one."
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create(wait: wait)
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else
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puts "Started instance. Please wait couple of minutes before doing SSH."
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begin
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i.start
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return true
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rescue Aws::EC2::Errors::IncorrectInstanceState => e
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if e.include? "is not in a state from which it can be started."
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Logger.fatal("EC2 instance is in a state from which it can't be started right now. Try later.")
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else
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Logger.fatal("Could not start EC2 instance: #{e}")
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end
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end
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end
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end
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end
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return false
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end
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def stop
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if get_instance_id.to_s.empty?
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Logger.fatal("No instance that could be stopped.")
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end
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i = @ec2.instance(@instance_id)
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if i.exists?
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case i.state.code
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when 48 # terminated
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puts "#{i.id} is already stopped."
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when 64 # stopping
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puts "#{i.id} is stopping, so it become stopped in a while."
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when 80 # stopped
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puts "#{i.id} is already stopped."
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else
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puts "Stopped an instance."
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i.stop
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end
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end
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end
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def restart
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if get_instance_id.to_s.empty?
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Logger.fatal("No instance that could be restarted.")
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end
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i = @ec2.instance(@instance_id)
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if i.exists?
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case i.state.code
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when 48 # terminated
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start
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else
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puts "Issued instance reboot signal."
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i.reboot
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end
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end
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end
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def terminate
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if get_instance_id.to_s.empty?
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Logger.fatal("No instance that could be terminated.")
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end
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i = @ec2.instance(@instance_id)
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if i.exists?
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case i.state.code
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when 48 # terminated
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puts "#{i.id} is already terminated."
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else
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puts "Terminated instance. Cleared instance id file."
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i.terminate
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File.open(@instance_id_file, 'w') do |f|
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f.puts("")
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end
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end
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end
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end
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def address(raw: false)
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if get_instance_id.to_s.empty?
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if @config[:quiet]
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exit 1
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end
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Logger.fatal("No instance id to operate on. Instance will need to be created first.")
|
||
|
|
end
|
||
|
|
|
||
|
|
addr = ""
|
||
|
|
i = @ec2.instance(@instance_id)
|
||
|
|
if i.exists?
|
||
|
|
Logger.dbg("Instance found.")
|
||
|
|
|
||
|
|
addr = i.public_ip_address
|
||
|
|
|
||
|
|
if not raw
|
||
|
|
if @config[:verbose]
|
||
|
|
puts "Public IPv4:\t#{i.public_ip_address}"
|
||
|
|
puts "Public FQDN:\t#{i.public_dns_name}"
|
||
|
|
puts "Private IPv4:\t#{i.private_ip_address}"
|
||
|
|
puts "Private FQDN:\t#{i.private_dns_name}"
|
||
|
|
else
|
||
|
|
puts i.public_ip_address
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
addr
|
||
|
|
end
|
||
|
|
|
||
|
|
def status(raw: false, quitOnFailure: true)
|
||
|
|
get_instance_id
|
||
|
|
|
||
|
|
if @instance_id.to_s.empty?
|
||
|
|
Logger.fail("No instance id stored locally. Will try to look up online.")
|
||
|
|
if not try_to_find_instance_id
|
||
|
|
puts("No instance created.")
|
||
|
|
exit 1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
if @instance_id.to_s.empty? and quitOnFailure
|
||
|
|
state = "notcreated"
|
||
|
|
if not raw
|
||
|
|
puts "State: notcreated"
|
||
|
|
end
|
||
|
|
return state
|
||
|
|
end
|
||
|
|
|
||
|
|
state = ""
|
||
|
|
inst = @ec2.instance(@instance_id)
|
||
|
|
if inst.exists?
|
||
|
|
state = inst.state.name
|
||
|
|
if not raw
|
||
|
|
if @config[:verbose] or @config[:debug]
|
||
|
|
puts "State:\t\tInstance is #{inst.state.name} (#{inst.state.code})"
|
||
|
|
|
||
|
|
if inst.state.code == 16
|
||
|
|
dif = ((Time.now - inst.launch_time) / 60).ceil
|
||
|
|
t = inst.launch_time
|
||
|
|
stime = t.strftime("%Y-%m-%d %I:%M%P UTC")
|
||
|
|
puts "Launched time:\t#{stime}; #{dif.to_s} minutes ago."
|
||
|
|
end
|
||
|
|
else
|
||
|
|
puts inst.state.name
|
||
|
|
end
|
||
|
|
end
|
||
|
|
else
|
||
|
|
state = "notcreated"
|
||
|
|
if not raw
|
||
|
|
puts "State: notcreated"
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
state
|
||
|
|
end
|
||
|
|
|
||
|
|
def ssh
|
||
|
|
state = status(raw: true)
|
||
|
|
|
||
|
|
if state == 'stopped'
|
||
|
|
puts "Instance is stopped. Creating it first."
|
||
|
|
if not start(wait: true)
|
||
|
|
Logger.fatal("Could not create EC2 instance.")
|
||
|
|
end
|
||
|
|
|
||
|
|
state = 'running'
|
||
|
|
end
|
||
|
|
|
||
|
|
if state == 'running'
|
||
|
|
addr = address(raw: true)
|
||
|
|
|
||
|
|
cmd = "ssh -i #{@config[:ssh_identity_file]} -o ConnectTimeout=10 -oStrictHostKeyChecking=no #{@config[:ssh_user]}@#{addr}"
|
||
|
|
Logger.dbg("Running command: #{cmd}")
|
||
|
|
|
||
|
|
puts "Attempting to ssh #{@config[:ssh_user]}@#{addr} ...\n\n"
|
||
|
|
exec(cmd)
|
||
|
|
end
|
||
|
|
|
||
|
|
raise "Unsupported EC2 machine state: #{state}"
|
||
|
|
end
|
||
|
|
|
||
|
|
def notify
|
||
|
|
get_instance_id
|
||
|
|
|
||
|
|
if @instance_id.to_s.empty?
|
||
|
|
if not try_to_find_instance_id
|
||
|
|
exit 1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
inst = @ec2.instance(@instance_id)
|
||
|
|
if inst.exists?
|
||
|
|
Logger.dbg('Instance exists.')
|
||
|
|
if inst.state.code == 16
|
||
|
|
Logger.dbg('Instance is running.')
|
||
|
|
minutes = ((Time.now - inst.launch_time) / 60).ceil
|
||
|
|
|
||
|
|
title = "EC2 Instance #{@config[:instance_name]} is running."
|
||
|
|
body = ""
|
||
|
|
if minutes < 60
|
||
|
|
body = "Your instance has been running #{minutes} minutes by now. Consider stopping it."
|
||
|
|
else
|
||
|
|
hours = (minutes / 60).floor
|
||
|
|
restm = minutes % 60
|
||
|
|
body = "Your instance's been running #{hours}h and #{restm}mins by now. Consider stopping it."
|
||
|
|
end
|
||
|
|
|
||
|
|
cmd = "notify-send '#{title}' '#{body}'"
|
||
|
|
|
||
|
|
Logger.dbg("Executing notification command: #{cmd}")
|
||
|
|
exec(cmd)
|
||
|
|
puts cmd
|
||
|
|
else
|
||
|
|
Logger.dbg("Instance is not running.")
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
def parse_options
|
||
|
|
options = {}
|
||
|
|
parser = OptionParser.new do |opts|
|
||
|
|
funcs = ""
|
||
|
|
$supported_funcs.each do |k, v|
|
||
|
|
funcs += " - #{k}\t\t\t#{v}\n"
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.banner = %Q(
|
||
|
|
Usage: aws-manager.rb [options] <func> <name>
|
||
|
|
|
||
|
|
Available 'func' values:
|
||
|
|
#{funcs}
|
||
|
|
Options:
|
||
|
|
)
|
||
|
|
opts.on('-h', '--help', 'Display this screen' ) do
|
||
|
|
puts opts
|
||
|
|
exit
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-q', '--quiet', 'Surpress informative output.') do |q|
|
||
|
|
$config[:quiet] = q
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-v', '--verbose', 'Turn on verbose logging.') do |v|
|
||
|
|
$config[:verbose] = v
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('--debug', 'Turn on debug logging.') do |d|
|
||
|
|
$config[:debug] = d
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-dPATH', '--aws-path=PATH', "Path to shared AWS credentials file. Default value that will be used: $AWS_PATH/credentials ") do |p|
|
||
|
|
$config[:aws_path] = p
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-pNAME', '--profile=NAME', 'AWS credentials profile to use. Should no option is given, "default" is used.') do |n|
|
||
|
|
$config[:aws_profile] = n
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-pREGION', '--region=REGION', 'AWS regoin to use. Default one: "us-east-1".') do |n|
|
||
|
|
$config[:region] = n
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-iID', '--image-id=ID', "AWS image ID to create an EC2 from. Default: '#{$config[:image_id]}") do |i|
|
||
|
|
$config[:image_id] = i
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-kKEY', '--key-name=KEY', "AWS EC2 Key Name to use. Default: '#{$config[:key_name]}") do |k|
|
||
|
|
$config[:key_name] = k
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-sNAME', '--security-group-name=NAME', "AWS EC2 Security Group name to use. Default: '#{$config[:sg_name]}") do |s|
|
||
|
|
$config[:sg_name] = s
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-tTYPE', '--instance-type=TYPE', "Instance type to spin. Default: '#{$config[:instance_type]}") do |s|
|
||
|
|
$config[:instance_type] = s
|
||
|
|
end
|
||
|
|
|
||
|
|
opts.on('-uUSER', '--user=USER', "SSH user to log into when doing 'ssh'. Default: '#{$config[:ssh_user]}") do |s|
|
||
|
|
$config[:ssh_user] = s
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
args = parser.parse!
|
||
|
|
|
||
|
|
func = args.shift.downcase
|
||
|
|
raise "Need to specify <func> parameter to invoke." unless func
|
||
|
|
|
||
|
|
unless $supported_funcs.keys.include? func
|
||
|
|
Logger.fatal("Unsupported function specified. You need to pick on of these: #{$supported_funcs.keys.join(', ')}")
|
||
|
|
end
|
||
|
|
|
||
|
|
instance_name = args.shift.downcase
|
||
|
|
$config[:instance_name] = instance_name
|
||
|
|
|
||
|
|
raise "Need to specify <name> parameter to invoke." unless instance_name
|
||
|
|
|
||
|
|
raise "EC2 Security Group name must be specified." unless $config[:sg_name]
|
||
|
|
raise "EC2 Key pair name must be specified." unless $config[:key_name]
|
||
|
|
raise "EC2 image id (AMI) must be specified." unless $config[:image_id]
|
||
|
|
raise "EC2 instance type must be specified." unless $config[:instance_type]
|
||
|
|
raise "EC2 instance name must be specified." unless $config[:instance_name]
|
||
|
|
raise "EC2 instance name must be specified." unless $config[:ssh_user]
|
||
|
|
|
||
|
|
return func, instance_name
|
||
|
|
end
|
||
|
|
|
||
|
|
def main
|
||
|
|
func, instance_name = parse_options
|
||
|
|
Logger.dbg("Using AWS configuration path: #{$aws_config_path}")
|
||
|
|
Logger.dbg("Action to take: #{func} #{instance_name}")
|
||
|
|
|
||
|
|
manager = AwsEc2Manager.new(func, instance_name, $config)
|
||
|
|
manager.send func
|
||
|
|
end
|
||
|
|
|
||
|
|
main
|