Class: PoolParty::Cloud

Inherits:
Base show all
Defined in:
lib/poolparty/cloud.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#name

Instance Method Summary collapse

Methods inherited from Base

#initialize, #method_missing

Constructor Details

This class inherits a constructor from PoolParty::Base

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class PoolParty::Base

Instance Attribute Details

#cloud_provider ⇒ Object (readonly)

Returns the value of attribute cloud_provider.



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# File 'lib/poolparty/cloud.rb', line 78

def cloud_provider
  @cloud_provider
end

Instance Method Details

#bootstrap! ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 197

def bootstrap!
  cloud_provider.bootstrap_nodes!(tmp_path)
end

#chef(chef_type = :solo, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/poolparty/cloud.rb', line 96

def chef(chef_type=:solo, &block)
  raise ArgumentError, "Chef type must be one of #{Chef.types.map{|v| ":" + v.to_s}.join(",")}." unless Chef.types.include?(chef_type)
  @chef||=Chef.get_chef(chef_type,self,&block)
end

#cmd(commands, opts = {}) ⇒ Object

Run command/s on all nodes in the cloud. Returns a hash of instance_id=>result pairs



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# File 'lib/poolparty/cloud.rb', line 227

def cmd(commands, opts={})
  key_by = opts.delete(:key_by) || :instance_id
  results = {}
  threads = nodes.collect do |n|
    puts "result for #{n.instance_id} ==> n.ssh(#{commands.inspect}, #{opts.inspect})"
    Thread.new{ results[ n.send(key_by) ] = n.ssh(commands, opts) }
  end
  threads.each{ |aThread| aThread.join }
  results
end

#compile! ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 187

def compile!
  unless @uploads.nil?
    puts "Uploading files via rsync"
    @uploads.each do |upload|
      rsync upload[:source], upload[:dest]
    end
  end
  @chef.compile! unless @chef.nil?
end

#configure! ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 201

def configure!
  compile!
  cloud_provider.configure_nodes!(tmp_path)
end

#describe_instance(o = {}) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 242

def describe_instance(o={}); cloud_provider.describe_instance(o);end

#describe_instances(o = {}) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 241

def describe_instances(o={}); cloud_provider.describe_instances(o);end

#instances(arg) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 43

def instances(arg)
  case arg
  when Range
    minimum_instances arg.first
    maximum_instances arg.last
  when Fixnum
    minimum_instances arg
    maximum_instances arg
  when Hash
    nodes(arg)
  else
    raise PoolParty::PoolPartyError.create("DslMethodCall", "You must call instances with either a number, a range or a hash (for a list of nodes)")
  end
end

#keypair(n = nil, extra_paths = []) ⇒ Object

returns an instance of Keypair You can pass either a filename which will be searched for in ~/.ec2/ and ~/.ssh/ Or you can pass a full filepath



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# File 'lib/poolparty/cloud.rb', line 12

def keypair(n=nil, extra_paths=[])
  return @keypair if @keypair
  @keypair = case n
  when String
    Keypair.new(n, extra_paths)
  when nil
    fpath = CloudProviders::CloudProvider.default_keypair_path/"#{proper_name}"
    File.exists?(fpath) ? Keypair.new(fpath, extra_paths) : generate_keypair(extra_paths)
  else
    raise ArgumentError, "There was an error when defining the keypair"
  end
end

#nodes ⇒ Object

TODO: list of nodes needs to be consistentley sorted



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# File 'lib/poolparty/cloud.rb', line 221

def nodes
  cloud_provider.nodes.select {|a| a.in_service? }
end

#pool ⇒ Object

The pool can either be the parent (the context where the object is declared) or the global pool object



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# File 'lib/poolparty/cloud.rb', line 68

def pool
  parent || pool
end

#proper_name ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 244

def proper_name
  "#{parent.name}-#{name}"
end

#reboot! ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 150

def reboot!
  orig_nodes = nodes
  if autoscalers.empty?
    puts <<-EOE
No autoscalers defined
  Launching new nodes and then shutting down original nodes
    EOE
    # Terminate the nodes
    orig_nodes.each_with_index do |node, i|
      # Start new nodes
      print "Starting node: #{i}...\n"
      expand_by(1)
      print "Terminating node: #{i}...\n"
      node.terminate!
      puts ""
    end
  else
    # Terminate the nodes
    @num_nodes = orig_nodes.size
    orig_nodes.each do |node|
      node.terminate!
      puts "----> Terminated node: #{node.instance_id}"
      # Wait for the autoscaler to boot the next node
      puts "----> Waiting for new node to boot via the autoscaler"
      loop do
        reset!
        break if nodes.size == @num_nodes
        $stdout.print "."
        $stdout.flush
        sleep 1
      end
    end
  end
  run
  puts ""
end

#reset! ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 206

def reset!
  cloud_provider.reset!
end

#rsync(source, dest) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 214

def rsync(source, dest)
  nodes.each do |node|
    node.rsync(:source => source, :destination => dest)
  end
end

#run ⇒ Object

compile the cloud spec and execute the compiled system and remote calls



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# File 'lib/poolparty/cloud.rb', line 101

def run
  puts "  running on #{cloud_provider.class}"
  cloud_provider.run
  unless @chef.nil?
    compile!
    bootstrap!
  end
end

#run_instance(o = {}) ⇒ Object

Explicit proxies to cloud_provider methods



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# File 'lib/poolparty/cloud.rb', line 239

def run_instance(o={}); cloud_provider.run_instance(o);end

#ssh(num = 0) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 210

def ssh(num=0)
  nodes[num].ssh
end

#teardown ⇒ Object

TODO: Incomplete and needs testing Shutdown and delete the load_balancers, auto_scaling_groups, launch_configurations, security_groups, triggers and instances defined by this cloud



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# File 'lib/poolparty/cloud.rb', line 114

def teardown
  raise "Only Ec2 teardown supported" unless cloud_provider.name.to_s == 'ec2'
  puts "! Tearing down cloud #{name}"
  # load_balancers.each do |name, lb|
  #   puts "! Deleting load_balaner #{lb_name}"
  #   lb.teardown
  # end
  load_balancers.each do |lb|
    puts "-----> Tearing down load balancer: #{lb.name}"
    lb.teardown
  end

  rds_instances.each do |rds|
    puts "-----> Tearing down RDS Instance: #{rds.name}"
    rds.teardown
  end
  # instances belonging to an auto_scaling group must be deleted before the auto_scaling group
  #THIS SCARES ME! nodes.each{|n| n.terminate_instance!}
  # loop {nodes.size>0 ? sleep(4) : break }
  if autoscalers.empty?
    nodes.each do |node|
      node.terminate!
    end
  else
    autoscalers.each do |a|
      puts "-----> Tearing down autoscaler #{a.name}"
      a.teardown
    end
  end
  # autoscalers.keys.each do |as_name|
  #   puts "! Deleting auto_scaling_group #{as_name}"
  #   cloud_provider.as.delete_autoscaling_group('AutoScalingGroupName' => as_name)
  # end
  #TODO: keypair.delete # Do we want to delete the keypair?  probably, but not certain
end

#terminate_instance!(o = {}) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 240

def terminate_instance!(o={}); cloud_provider.terminate_instance!(o);end

#tmp_path ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 72

def tmp_path
  "/tmp/poolparty" / pool.name / name
end

#upload(source, dest) ⇒ Object

Upload the source to dest ( using rsync )



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# File 'lib/poolparty/cloud.rb', line 60

def upload source, dest
  @uploads ||= []
  @uploads << { :source => source, :dest => dest }
end

#using(provider_name, &block) ⇒ Object 



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# File 'lib/poolparty/cloud.rb', line 79

def using(provider_name, &block)
  return @cloud_provider if @cloud_provider
  @cloud_provider = "#{provider_name}".constantize(CloudProviders).send(:new, provider_name, :cloud => self, &block)
  # Decorate the cloud with the cloud_provider methods
  (class << self; self; end).instance_variable_set('@cloud_provider', @cloud_provider)
    (class << self; self; end).class_eval do
      @cloud_provider.public_methods(false).each do |meth|
        next if respond_to?(meth) || method_defined?(meth) || private_method_defined?(meth)
        eval <<-EOE
          def #{meth}(*args, &block)
            @cloud_provider.send(:#{meth}, *args, &block)
          end
        EOE
    end
  end
end