Class: CloudInfo::Instances

Inherits:
Object
  • Object
show all
Includes:
Aws
Defined in:
lib/cloud_info/instances.rb

Defined Under Namespace

Modules: Aws

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Aws

#aws_group_for_instance_id, #aws_groups, #aws_instances

Constructor Details

#initialize(cloud_info, options = {}) ⇒ Instances

Returns a new instance of Instances.



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# File 'lib/cloud_info/instances.rb', line 10

def initialize(cloud_info, options = {})
  @cloud_info = cloud_info
  @home_dir = ENV['HOME']
  @user = "root"  # TODO: move out
  @private_key = options[:private_key] # TODO: move out
  
  @ey_cloud = "#{@home_dir}/.ey-cloud.yml"
  unless File.exist?(@ey_cloud)
    warn("You need to have an ~/.ey-cloud.yml file")
    exit(1)
  end
  @config = YAML.load(IO.read(@ey_cloud))
  
  @servers = {}
  @sessions = []
  @ec2 = setup_ec2
end

Instance Attribute Details

#private_key ⇒ Object

Returns the value of attribute private_key.



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# File 'lib/cloud_info/instances.rb', line 8

def private_key
  @private_key
end

#servers ⇒ Object

Returns the value of attribute servers.



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# File 'lib/cloud_info/instances.rb', line 8

def servers
  @servers
end

#sessions ⇒ Object

Returns the value of attribute sessions.



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# File 'lib/cloud_info/instances.rb', line 8

def sessions
  @sessions
end

#user ⇒ Object

Returns the value of attribute user.



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# File 'lib/cloud_info/instances.rb', line 8

def user
  @user
end

Class Method Details

.ey_environments ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 139

def self.ey_environments
  out = ey_recipes
  environments = out.split("\n").grep(/env/).collect {|x| x =~ /env\: (\w+) / ; $1 }
end

.ey_recipes ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 132

def self.ey_recipes
  @@ey_recipes ||= `ey-recipes`
end

Instance Method Details

#build_server_infos ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 65

def build_server_infos
  return if @built
  execute_on_servers do |ssh|
    @servers[ssh.host] ||= {}
    dna_json = ssh.exec!("cat /etc/chef/dna.json")
    @servers[ssh.host]["dna"] = JSON.parse(dna_json)
  end
  @built = true
end

#connect_to_servers ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 48

def connect_to_servers
  thread = Thread.current
  hosts_with_blanks = instances.select{|i| i[:aws_state] == 'running'}.collect {|i| i[:dns_name]}
  hosts = hosts_with_blanks.select{|i| i[:dns_name] != ""}
  if hosts_with_blanks.size != hosts.size
    puts "WARNING: some hosts do not have dns_name's yet, amazon is not yet ready"
  end
  
  threads = hosts.collect do |host|
    Thread.new {
      @sessions << Net::SSH.start(host, @user, {:keys => @private_key})
      @sessions
    }
  end
  threads.collect {|t| t.join}
end

#execute_on_servers ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 75

def execute_on_servers
  connect_to_servers
  threads = []
  sessions.each do |ssh|
    threads << Thread.new {
      yield(ssh)
    }
  end
  threads.collect{|t| t.join}
end

#ey_environments ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 143

def ey_environments
  self.class.ey_environments
end

#ey_instances(env_name = nil) ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 147

def ey_instances(env_name = nil)
  instance_ids = []
  out = ey_recipes
  lines = out.split("\n")
  line_with_instances = false
  lines.each do |line|
    if line_with_instances
      md = line.match(/\[(.*)\]/)
      list = md[1]
      instance_ids = list.split(",").collect{|x| x.gsub('"','').strip}
      break
    end
    if line =~ Regexp.new(env_name)
      line_with_instances = true # next line will have the instances info on it
    end
  end
  instance_ids
end

#ey_recipes ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 135

def ey_recipes
  self.class.ey_recipes
end

#hosts ⇒ Object

builds up the hosts hash TODO: move out looks like this: 

"prod_br_util0"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_memcached0"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_util1"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_memcached1"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_app1"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_app2"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_app3"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_db0"=>"ec2-123.456.789.123.compute-1.amazonaws.com",
"prod_br_db1"=>"ec2-123.456.789.123.compute-1.amazonaws.com"



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# File 'lib/cloud_info/instances.rb', line 99

def hosts
  build_server_infos
  h = {}
  counters = Hash.new(0)
  servers.each do |host, v|
    node = v["dna"]
    instance_role = node["instance_role"]
    env_name = @cloud_info.env_name
    
    case instance_role
    when "app_master"
      h["#{env_name}_app0"] = node["master_app_server"]["public_ip"]
    when "solo"
      h["#{env_name}_app0"] = host
    when "app"
      h["#{env_name}_app#{counters[:app] += 1}"] = host
    when "util"
      if node["name"] =~ /util/
        h["#{env_name}_#{node["name"]}"] = host
        counters[:util] += 1
      elsif
        h["#{env_name}_#{node["name"]}"] = host
        counters[:memcached] += 1
      end
    when "db_master"
      h["#{env_name}_db0"] = host
    when "db_slave"
      h["#{env_name}_db#{counters[:db] += 1}"] = host
    end
  end
  h
end

#instances ⇒ Object

only the instances for the env



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# File 'lib/cloud_info/instances.rb', line 37

def instances
  instance_ids = ey_instances(@cloud_info.env_name)
  if instance_ids.empty?
    instances = []
  else
    group_id = aws_group_for_instance_id(instance_ids.first)
    instances = instances_in_group(group_id)
    instances
  end
end

#instances_in_group(group_id) ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 32

def instances_in_group(group_id)
  aws_instances.select {|x| x[:aws_groups].include?(group_id) }
end

#setup_ec2 ⇒ Object 



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# File 'lib/cloud_info/instances.rb', line 28

def setup_ec2
  RightAws::Ec2.new(@config[:aws_secret_id], @config[:aws_secret_key])
end