Class: WASP::Aws

Inherits:
Object show all
Defined in:
lib/wasp/ec2.rb

Constant Summary collapse

SLEEP_TIME = 
1
LINE_LENGTH = 
100

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Aws

Returns a new instance of Aws.



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# File 'lib/wasp/ec2.rb', line 18

def initialize (args)
  config_path = ENV["HOME"] + "/.waspaws.yml"
  begin
    AWS.config(YAML.load(File.read(config_path)))
    @ec2 = AWS::EC2.new
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
    puts "[WARN]".yellow + " Please set AWS credential file."
    exit false
  end
  
  # evaluate AWS access_key and secret_access_key
  begin
    print "EC2".green + " Checking access key validation.."
    @ec2.availability_zones.each do |av| 
      av.name 
    end
    puts " OK".green
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
    puts "[WARN]".yellow + " Please copy/paste correct AWS access_key and secret_access_key to config/aws.yml file"
    exit false
  end
  
  @num_wasps = if args[:server].nil? then WASP::Const::DEFAULT_WASPS
              else
                args[:server].to_i
              end
  @group = if args[:group].nil? then WASP::Const::DEFAULT_GROUP
           else
             args[:group]
           end
  @zone = if args[:zone].nil? then WASP::Const::DEFAULT_ZONE
          else
            args[:zone]
          end              
  @ami = if args[:ami].nil? then get_default_ami(@zone)
         else
           args[:ami]
         end
  @login = if args[:login].nil? then WASP::Const::DEFAULT_USER
           else
             args[:login]
           end     
  
  @key = args[:key]
  
  
  @regions = @ec2.regions
  @instance_list = []
  @instances = nil
end

Instance Attribute Details

#config_path ⇒ Object (readonly)

Returns the value of attribute config_path.



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# File 'lib/wasp/ec2.rb', line 5

def config_path
  @config_path
end

#ec2 ⇒ Object (readonly)

Returns the value of attribute ec2.



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# File 'lib/wasp/ec2.rb', line 6

def ec2
  @ec2
end

#group ⇒ Object (readonly)

Returns the value of attribute group.



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# File 'lib/wasp/ec2.rb', line 7

def group
  @group
end

#instance_list ⇒ Object (readonly)

Returns the value of attribute instance_list.



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# File 'lib/wasp/ec2.rb', line 11

def instance_list
  @instance_list
end

#instances ⇒ Object (readonly)

Returns the value of attribute instances.



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# File 'lib/wasp/ec2.rb', line 9

def instances
  @instances
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/wasp/ec2.rb', line 8

def key
  @key
end

#login ⇒ Object (readonly)

Returns the value of attribute login.



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# File 'lib/wasp/ec2.rb', line 13

def 
  @login
end

#regions ⇒ Object (readonly)

Returns the value of attribute regions.



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# File 'lib/wasp/ec2.rb', line 10

def regions
  @regions
end

#threads ⇒ Object (readonly)

Returns the value of attribute threads.



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# File 'lib/wasp/ec2.rb', line 12

def threads
  @threads
end

Instance Method Details

#_delete_file ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 218

def _delete_file
  begin
    File.delete("#{ENV["HOME"]}/.nest")
  rescue => ex
    puts "[WARN]".yellow + "#{ex.message}"
    puts "There is no wasps in the air."
  end
end

#_get_instances ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 173

def _get_instances
  status_of_wasps = {}
  if @instance_list.count == 0 then
    begin
      File.open("#{ENV["HOME"]}/.nest", "r") do |file|
        lines = file.readlines
        lines.each do |line|
          instance, key, zone,  = line.split(' ')
          
          if status_of_wasps[zone].nil? then
            status_of_wasps[zone] = {}
            status_of_wasps[zone][:instances] = []
            status_of_wasps[zone][:instances].push(instance)
            status_of_wasps[zone][:login] = 
          else
            status_of_wasps[zone][:instances].push(instance)
          end
        end
      end
    rescue => ex
      puts "There is no wasps in the air."
      
      return nil
    end
  end

  return status_of_wasps
end

#_write_to_file ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 202

def _write_to_file
  begin
    File.open("#{ENV["HOME"]}/.nest", "a+") do |file|
      if @instances.class == Array then
        @instances.each do |i|
          file.puts("#{i.id} #{i.key_name} #{i.availability_zone} #{@login}\n")
        end
      else
        file.puts("#{@instances.id} #{@instances.key_name} #{@instances.availability_zone} #{@login}\n")
      end
    end
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
  end
end

#create ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 143

def create 
  puts "EC2".green + " #{@num_wasps} wasps will be launched.."
  
  begin
    @instances = @ec2.regions[@zone].instances.create(:image_id=>@ami,
                                          :security_groups=>[@group],
                                          :key_name=>@key + '-' + @zone,
                                          :instance_type=>'t1.micro',
                                          :count=>@num_wasps)                                      
    num_wasps = 0
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
    return false
  end
  if @instances.class == Array then
    @instances.each do |i|
      waiting_wasp(i)
    end
    num_wasps = @instances.count
  else
    waiting_wasp(@instances)
    num_wasps = 1
  end
  
  _write_to_file

  puts "The swarm has assembled " + "#{num_wasps}".yellow + " wasps.\n"
  true
end

#get_default_ami(zone) ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 325

def get_default_ami(zone)
  case
  when zone.match(/eu-west-1/)
    "ami-895069fd"
  when zone.match(/sa-east-1/)
    "ami-b673acab"
  when zone.match(/us-west-1/)
    "ami-6da8f128"
  when zone.match(/us-west-2/)
    "ami-ae05889e"
  when zone.match(/ap-northeast-1/)
    "ami-10299f11"
  when zone.match(/us-east-1/)
    "ami-baba68d3"
  when zone.match(/ap-southeast-1/)
    "ami-4296d210"
  else
    "ami-baba68d3"
  end
end

#get_ec2_zone(zone) ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 304

def get_ec2_zone(zone)
  case
  when zone.match(/eu-west-1/)
    "eu-west-1"
  when zone.match(/sa-east-1/)
    "sa-east-1"
  when zone.match(/us-west-1/)
    "us-west-1"
  when zone.match(/us-west-2/)
    "us-west-2"
  when zone.match(/ap-northeast-1/)
    "ap-northeast-1"
  when zone.match(/us-east-1/)
    "us-east-1"
  when zone.match(/ap-southeast-1/)
    "ap-southeast-1"
  else
    "us-east-1"
  end
end

#get_keypair ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 71

def get_keypair 
  make_key = true
  key = @regions[@zone].key_pairs.filter('key-name', @key + '-' + @zone).first
  
  if key.nil? == false then
    if not File.exists?("#{ENV['HOME']}/.ssh/#{@key}-#{@zone}.pem") then
      key.delete 
      make_key = true
    else
      make_key = false
    end
  end
              
  if make_key then
    key = @regions[@zone].key_pairs.create(@key + '-' + @zone)
    keyfile = "#{ENV['HOME']}/.ssh/#{@key}-#{@zone}.pem"
    begin
      File.delete(keyfile) if File.exists?(keyfile)
      File.open(keyfile, "w") do |f|
        f.write(key.private_key)
      end
      File.chmod(0400, keyfile)
    rescue => ex
      print "[WARN]".yellow + " #{ex.message}"
      exit false
    end
  end

  puts "EC2".green + " Private key is created in " + "~/.ssh/#{@key}-#{@zone}.pem".bold
end

#get_regions ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 346

def get_regions
  regions = []
  @ec2.regions.each do |r|
    regions.push(r.name)
  end
  
  regions
end

#get_security_group ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 102

def get_security_group
  found = false
  puts "EC2".green + " Look up existed security group [" + "#{@group}".bold + "].."
  security_groups = @regions[@zone].security_groups
  
  found = true if security_groups.filter('group-name', @group).first != nil
  
  if not found then
    puts "EC2".green + " Creating security group " + "#{@group}".bold + ".."
    wasps = security_groups.create(@group)
    puts "EC2".green + " Open inbound tcp port :#{WASP::Const::SSH_PORT}"
    wasps.authorize_ingress(:tcp, WASP::Const::SSH_PORT)
    puts "EC2".green + " Open inbound tcp port :#{WASP::Const::NATS_PORT}"
    wasps.authorize_ingress(:tcp, WASP::Const::NATS_PORT)
    puts "EC2".green + " Allow ping"
    wasps.allow_ping
  end
  
  puts "EC2".green + " Security group [#{@group}] have set.."
end

#get_wasp_domain(zone = WASP::Const::DEFAULT_ZONE, id) ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 294

def get_wasp_domain(zone=WASP::Const::DEFAULT_ZONE , id)
  begin
    z = get_ec2_zone(zone)
    @ec2.regions[z].instances[id].dns_name
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
    return nil
  end
end

#get_wasp_status(zone = WASP::Const::DEFAULT_ZONE, id) ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 284

def get_wasp_status(zone=WASP::Const::DEFAULT_ZONE , id)
  begin
    z = get_ec2_zone(zone)
    @ec2.regions[z].instances[id].status
  rescue => ex
    puts "[WARN]".yellow + " #{ex.message}"
    return nil
  end        
end

#get_wasps ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 254

def get_wasps
  wasps = []
  ins = _get_instances
  
  return nil if ins.nil?
  
  count = ins.count
  ins.each do |region, info|
    r = get_ec2_zone(region)
     = info[:login]
    info[:instances].each do |it|
      i = @ec2.regions[r].instances[it]
    
      wasps.push({:instance_id => i.id, 
                 :instance_name => i.dns_name, 
                 :region => region,
                 :login => ,
                 :key_name => i.key_pair.name,
                 :report => nil,
                 :wavereport => nil})
    end
  end
  
  wasps
end

#status ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 280

def status
  return ins = _get_instances
end

#terminate ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 227

def terminate
  count = 0
  
  #if @instances.nil? then
    ins = _get_instances
    
    return nil if ins.nil?
    
    
    ins.each do |region, info|
      r = get_ec2_zone(region)
      info[:instances].each do |i| 
        count += 1
        puts "Wasp" + " #{i}".yellow + " from #{region} is going home"
        begin
          @ec2.regions[r].instances[i].terminate
        rescue => e
          puts "#{e.message}"
        end
      end
    end
  
  _delete_file
  
  puts "EC2".green + " Stood down #{count} wasps.\n"
end

#waiting_wasp(i) ⇒ Object 



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# File 'lib/wasp/ec2.rb', line 123

def waiting_wasp (i)
  banner = "EC2".green + " Launching wasps: "
  
  display banner, false      
  while i.status == :pending do
    print '.'
    sleep SLEEP_TIME
  end

  if i.status == :running then
    clear(LINE_LENGTH)
    display "#{banner}#{'OK'.green}"
    @instance_list.push(i.id)
    puts "Wasp " + "#{i.id}".yellow + " is ready to attack"
    i.tags.Name = 'a wasp!'
  else
    puts "EC2".green + " #{i.id} is going to wrong place"
  end
end