Class: Beaker::Vmpooler

Inherits:
Hypervisor show all
Defined in:
lib/beaker/hypervisor/vmpooler.rb

Constant Summary collapse

SSH_EXCEPTIONS = 
[
  SocketError,
  Timeout::Error,
  Errno::ETIMEDOUT,
  Errno::EHOSTDOWN,
  Errno::EHOSTUNREACH,
  Errno::ECONNREFUSED,
  Errno::ECONNRESET,
  Errno::ENETUNREACH,
]

Constants inherited from Hypervisor

Hypervisor::CHARMAP

Constants included from HostPrebuiltSteps

HostPrebuiltSteps::APT_CFG, HostPrebuiltSteps::CUMULUS_PACKAGES, HostPrebuiltSteps::DEBIAN_PACKAGES, HostPrebuiltSteps::ETC_HOSTS_PATH, HostPrebuiltSteps::ETC_HOSTS_PATH_SOLARIS, HostPrebuiltSteps::IPS_PKG_REPO, HostPrebuiltSteps::NTPSERVER, HostPrebuiltSteps::PSWINDOWS_PACKAGES, HostPrebuiltSteps::ROOT_KEYS_SCRIPT, HostPrebuiltSteps::ROOT_KEYS_SYNC_CMD, HostPrebuiltSteps::SLEEPWAIT, HostPrebuiltSteps::SLES_PACKAGES, HostPrebuiltSteps::TRIES, HostPrebuiltSteps::UNIX_PACKAGES, HostPrebuiltSteps::WINDOWS_PACKAGES

Instance Method Summary collapse

Methods inherited from Hypervisor

#configure, create, #generate_host_name, #proxy_package_manager, #validate

Methods included from HostPrebuiltSteps

#add_el_extras, #additive_hash_merge, #apt_get_update, #check_and_install_packages_if_needed, #construct_env, #copy_file_to_remote, #copy_ssh_to_root, #disable_iptables, #disable_se_linux, #echo_on_host, #enable_root_login, #epel_info_for, #get_domain_name, #get_ip, #hack_etc_hosts, #package_proxy, #proxy_config, #set_env, #set_etc_hosts, #sync_root_keys, #timesync, #validate_host

Methods included from DSL::Patterns

#block_on

Constructor Details

#initialize(vmpooler_hosts, options) ⇒ Vmpooler

Returns a new instance of Vmpooler.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 18

def initialize(vmpooler_hosts, options)
  @options = options
  @logger = options[:logger]
  @hosts = vmpooler_hosts
end

Instance Method Details

#check_url(url) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 24

def check_url url
  begin
    URI.parse(url)
  rescue
    return false
  end
  true
end

#cleanup ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 111

def cleanup
  vm_names = @hosts.map {|h| h['vmhostname'] }.compact
  if @hosts.length != vm_names.length
    @logger.warn "Some hosts did not have vmhostname set correctly! This likely means VM provisioning was not successful"
  end

  start = Time.now
  vm_names.each do |name|
    @logger.notify "Handing '#{name}' back to vmpooler for VM destruction"

    uri = URI.parse(get_template_url(@options['pooling_api'], name))

    http = Net::HTTP.new( uri.host, uri.port )
    request = Net::HTTP::Delete.new(uri.request_uri)

    begin
      response = http.request(request)
    rescue *SSH_EXCEPTIONS => e
      report_and_raise(@logger, e, 'Vmpooler.cleanup (http.request)')
    end
  end

  @logger.notify "Spent %.2f seconds cleaning up" % (Time.now - start)
end

#get_template_url(pooling_api, template) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 33

def get_template_url pooling_api, template
  if not check_url(pooling_api)
    raise ArgumentError, "Invalid pooling_api URL: #{pooling_api}"
  end
  scheme = ''
  if not URI.parse(pooling_api).scheme
    scheme = 'http://'
  end
  #check that you have a valid uri
  template_url = scheme + pooling_api + '/vm/' + template
  if not check_url(template_url)
    raise ArgumentError, "Invalid full template URL: #{template_url}"
  end
  template_url
end

#provision ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 49

def provision
  request_payload = {}
  start = Time.now

  @hosts.each_with_index do |h, i|
    if not h['template']
      raise ArgumentError, "You must specify a template name for #{h}"
    end
    if h['template'] =~ /\//
      templatefolders = h['template'].split('/')
      h['template'] = templatefolders.pop
    end

    request_payload[h['template']] = (request_payload[h['template']].to_i + 1).to_s
  end

  @logger.notify "Requesting VM set from vmpooler"

  last_wait, wait = 0, 1
  waited = 0 #the amount of time we've spent waiting for this host to provision
  begin
    uri = URI.parse(@options['pooling_api'] + '/vm/')

    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Post.new(uri.request_uri)

    request.body = request_payload.to_json

    response = http.request(request)
    parsed_response = JSON.parse(response.body)

    if parsed_response['ok']
      domain = parsed_response['domain']

      @hosts.each_with_index do |h, i|
        if parsed_response[h['template']]['hostname'].is_a?(Array)
          hostname = parsed_response[h['template']]['hostname'].shift
        else
          hostname = parsed_response[h['template']]['hostname']
        end

        h['vmhostname'] = domain ? "#{hostname}.#{domain}" : hostname

        @logger.notify "Using available host '#{h['vmhostname']}' (#{h.name})"
      end
    else
      raise "Vmpooler.provision - requested host set not available"
    end
  rescue JSON::ParserError, RuntimeError, *SSH_EXCEPTIONS => e
    if waited <= @options[:timeout].to_i
      @logger.debug("Retrying provision for vmpooler host after waiting #{wait} second(s) (failed with #{e.class})")
      sleep wait
      waited += wait
      last_wait, wait = wait, last_wait + wait
    retry
    end
    report_and_raise(@logger, e, 'Vmpooler.provision')
  end

  @logger.notify 'Spent %.2f seconds grabbing VMs' % (Time.now - start)
end