Class: Mcrain::Riak

Inherits:
Base
  • Object
show all
Defined in:
lib/mcrain/riak.rb

Defined Under Namespace

Classes: Node

Instance Attribute Summary collapse

Attributes inherited from Base

#skip_reset_after_teardown

Instance Method Summary collapse

Methods inherited from Base

#logger, #start, #stop_or_kill_and_remove, #wait

Methods included from ClientProvider

#build_client, #client, #client_script

Methods included from ContainerController

#add_volume_options, #build_docker_options, #container, #container_image, #find_portno, #host, included, #info, #ip, #name, #port, #ssh_uri, #url

Instance Attribute Details

#automatic_clustering ⇒ Object

Returns the value of attribute automatic_clustering.



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# File 'lib/mcrain/riak.rb', line 12

def automatic_clustering
  @automatic_clustering
end

#backend ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 17

def backend
  @backend ||= "bitcask" # "leveldb"
end

#cluster_size ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 14

def cluster_size
  @cluster_size ||= 1
end

Instance Method Details

#client_class ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 93

def client_class
  ::Riak::Client
end

#client_init_args ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 97

def client_init_args
  return [
   {
     nodes: nodes.map{|node| {host: node.host, pb_port: node.port} }
   }
  ]
end

#client_require ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 105

def client_require
  'riak'
end

#nodes ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 78

def nodes
  unless @nodes
    @nodes = (cluster_size || 1).times.map{ Node.new(self) }
    array = @nodes.dup
    primary_node = array.shift
    array.each{|node| node.primary_node = primary_node}
  end
  @nodes
end

#reset ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 88

def reset
  (@nodes || []).each(&:reset)
  super
end

#setup ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 141

def setup
  DockerMachine.setup_docker_options
  # setup_nodes(nodes[0, 1]) # primary node
  # setup_nodes(nodes[1..-1])
  nodes.each do |node|
    setup_nodes([node])
  end
end

#setup_nodes(nodes) ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 150

def setup_nodes(nodes)
  return if nodes.empty?
  containers = nodes.map(&:container)
  containers.each(&:start!)

  # http://basho.co.jp/riak-quick-start-with-docker/
  #
  # "Please wait approximately 30 seconds for the cluster to stabilize"
  #   from https://gist.github.com/agutow/11133143#file-docker3-sh-L12
  sleep(30)
  nodes.each do |node|
    success = false
    20.times do
      success = node.ping
      break if success
      sleep(3)
    end
    unless success
      msg = "failed to run a riak server"
      timeout(10) do
        logs = node.container.logs(stdout: 1, stderr: 1)
        logger.error("#{msg}\nthe container logs...\n#{logs}")
      end
      raise msg
    end
  end
  logger.info("container started: " << containers.map{|c| c.json}.join("\n"))
end

#teardown ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 179

def teardown
  nodes.map(&:container).each do |c|
    begin
      c.stop!
    rescue => e
      c.kill!
    end
    c.remove
  end
  reset unless skip_reset_after_teardown
end

#wait_for_ready ⇒ Object 



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# File 'lib/mcrain/riak.rb', line 109

def wait_for_ready
  c = client
  logger.debug("sending a ping from client")
  begin
    r = c.ping
    raise "Ping failure with #{c.inspect}" unless r
  rescue => e
    logger.debug("[#{e.class.name}] #{e.message} by #{c.inspect}")
    raise e
  end
  20.times do |i|
    begin
      logger.debug("get and store ##{i}")
      o1 = c.bucket("test").get_or_new("foo")
      o1.data = {"bar" => 100}
      o1.store
      o2 = c.bucket("test").get_or_new("foo")
      raise "Something wrong!" unless o2.data == o1.data
      break
    rescue => e
      if e.message =~ /Expected success from Riak but received 0/
        sleep(0.5)
        logger.debug("retrying [#{e.class}] #{e.message}")
        retry
      else
        logger.warn(e)
        raise
      end
    end
  end
end

#wait_port ⇒ Object

ポートがLISTENされるまで待つ



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# File 'lib/mcrain/riak.rb', line 192

def wait_port
  nodes.each do |node|
    Mcrain.wait_port_opened(node.host, node.port, interval: 0.5, timeout: 30)
  end
end