Class: Beaker::Vmpooler

Inherits:
Hypervisor
  • Object
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,
]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(vmpooler_hosts, options) ⇒ Vmpooler

Returns a new instance of Vmpooler.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 21

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

Instance Attribute Details

#credentials ⇒ Object (readonly)

Returns the value of attribute credentials.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 19

def credentials
  @credentials
end

#hosts ⇒ Object (readonly)

Returns the value of attribute hosts.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 19

def hosts
  @hosts
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 19

def logger
  @logger
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 19

def options
  @options
end

Instance Method Details

#add_disk(hostname, disk_size) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 269

def add_disk(hostname, disk_size)
  @logger.notify "Requesting an additional disk of size #{disk_size}GB for #{hostname}"

  if !disk_size.to_s.match /[0123456789]/ || size <= '0'
    raise NameError.new "Disk size must be an integer greater than zero!"
  end

  begin
    uri = URI.parse(@options[:pooling_api] + '/vm/' + hostname + '/disk/' + disk_size.to_s)

    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Post.new(uri.request_uri)
    request['X-AUTH-TOKEN'] = @credentials[:vmpooler_token]

    response = http.request(request)

    parsed = parse_response(response)

    raise "Response from #{hostname} indicates disk was not added" if !parsed['ok']

  rescue NameError, RuntimeError, Errno::EINVAL, Errno::ECONNRESET, EOFError,
      Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, *SSH_EXCEPTIONS => e
    report_and_raise(@logger, e, 'Vmpooler.add_disk')
  end
end

#add_tags(host) ⇒ Hash

Override host tags with presets

Parameters:

  • host (Beaker::Host) —

    Beaker host

Returns:

  • (Hash) —

    Tag hash



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 75

def add_tags(host)
  host[:host_tags].merge(
      'beaker_version'    => Beaker::Version::STRING,
      'jenkins_build_url' => @options[:jenkins_build_url],
      'department'        => @options[:department],
      'project'           => @options[:project],
      'created_by'        => @options[:created_by],
      'name'              => host.name,
      'roles'             => host.host_hash[:roles].join(', ')
  )
end

#check_url(url) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 47

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 240

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)

    if @credentials[:vmpooler_token]
      request['X-AUTH-TOKEN'] = @credentials[:vmpooler_token]
    end

    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

#connection_preference(host) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 43

def connection_preference(host)
  [:vmhostname, :ip, :hostname]
end

#disk_added?(host, disk_size, index) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/beaker/hypervisor/vmpooler.rb', line 299

def disk_added?(host, disk_size, index)
  if host['disk'].nil?
    false
  else
    host['disk'][index] == "+#{disk_size}gb"
  end
end

#get_host_info(parsed_response, template) ⇒ Hash

Get host info hash from parsed json response

Parameters:

  • parsed_response (Hash) —

    hash

  • template (String) —

    string

Returns:

  • (Hash) —

    Host info hash



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 91

def get_host_info(parsed_response, template)
  parsed_response[template]
end

#get_template_url(pooling_api, template) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 56

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

#get_vm(hostname) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 307

def get_vm(hostname)
  begin
    uri = URI.parse(@options[:pooling_api] + '/vm/' + hostname)

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

    response = http.request(request)
  rescue RuntimeError, Errno::EINVAL, Errno::ECONNRESET, EOFError,
      Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, *SSH_EXCEPTIONS => e
    @logger.notify "Failed to connect to vmpooler while getting VM information!"
  end
end

#load_credentials(dot_fog = '.fog') ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 28

def load_credentials(dot_fog = '.fog')
  creds = {}
  begin
    fog = get_fog_credentials(dot_fog)
    if fog[:vmpooler_token]
      creds[:vmpooler_token] = fog[:vmpooler_token]
    else
      @logger.warn "vmpooler_token not found in credentials file (#{dot_fog})\nProceeding without authentication"
    end
  rescue ArgumentError => e
    @logger.warn "Invalid credentials file:\n(#{e.class}) #{e.message}\nProceeding without authentication"
  end
  creds
end

#parse_response(response) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 295

def parse_response(response)
  parsed_response = JSON.parse(response.body)
end

#provision ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 95

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

  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)

    if @credentials[:vmpooler_token]
      request['X-AUTH-TOKEN'] = @credentials[:vmpooler_token]
      @logger.notify "Requesting VM set from vmpooler (with authentication token)"
    else
      @logger.notify "Requesting VM set from vmpooler"
    end

    request_payload_json = request_payload.to_json
    @logger.trace( "Request payload json: #{request_payload_json}" )
    request.body = request_payload_json

    response = http.request(request)
    parsed_response = JSON.parse(response.body)
    @logger.trace( "Response parsed json: #{parsed_response}" )

    if parsed_response['ok']
      domain = parsed_response['domain']
      request_payload = {}

      @hosts.each_with_index do |h, i|
        # If the requested host template is not available on vmpooler
        host_template = h['template']
        if get_host_info(parsed_response, host_template).nil?
          request_payload[host_template] ||= 0
          request_payload[host_template] += 1
          next
        end
        if parsed_response[h['template']]['hostname'].is_a?(Array)
          hostname = parsed_response[host_template]['hostname'].shift
        else
          hostname = parsed_response[host_template]['hostname']
        end

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

        @logger.notify "Using available host '#{h['vmhostname']}' (#{h.name})"
      end
      unless request_payload.empty?
        raise "Vmpooler.provision - requested VM templates #{request_payload.keys} not available"
      end
    else
      if response.code == '401'
        raise "Vmpooler.provision - response from pooler not ok. Vmpooler token not authorized to make request.\n#{parsed_response}"
      else
        raise "Vmpooler.provision - response from pooler not ok. Requested host set #{request_payload.keys} not available in pooler.\n#{parsed_response}"
      end
    end
  rescue JSON::ParserError, RuntimeError, *SSH_EXCEPTIONS => e
    @logger.debug "Failed vmpooler provision: #{e.class} : #{e.message}"
    if waited <= @options[:timeout].to_i
      @logger.debug("Retrying provision for vmpooler host after waiting #{wait} second(s)")
      sleep wait
      waited += wait
      last_wait, wait = wait, [last_wait + wait, 15].min + rand(5)
      retry
    end
    report_and_raise(@logger, e, 'Vmpooler.provision')
  end

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

  start = Time.now
  @logger.notify 'Tagging vmpooler VMs'

  @hosts.each_with_index do |h, i|
    begin
      uri = URI.parse(@options[:pooling_api] + '/vm/' + h['vmhostname'].split('.')[0])

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

      # merge pre-defined tags with host tags
      request.body = { 'tags' => add_tags(h) }.to_json

      response = http.request(request)
    rescue RuntimeError, Errno::EINVAL, Errno::ECONNRESET, EOFError,
        Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, *SSH_EXCEPTIONS => e
      @logger.notify "Failed to connect to vmpooler for tagging!"
    end

    begin
      parsed_response = JSON.parse(response.body)

      unless parsed_response['ok']
        @logger.notify "Failed to tag host '#{h['vmhostname']}'!"
      end
    rescue JSON::ParserError => e
      @logger.notify "Failed to tag host '#{h['vmhostname']}'! (failed with #{e.class})"
    end
  end

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

  # add additional disks to vm
  @logger.debug 'Looking for disks to add...'

  @hosts.each do |h|
    hostname = h['vmhostname'].split(".")[0]

    if h['disks']
      @logger.debug "Found disks for #{hostname}!"
      disks = h['disks']

      disks.each_with_index do |disk_size, index|
        start = Time.now

        add_disk(hostname, disk_size)

        done = wait_for_disk(hostname, disk_size, index)
        if done
          @logger.notify "Spent %.2f seconds adding disk #{index}. " % (Time.now - start)
        else
          raise "Could not verify disk was added after %.2f seconds" % (Time.now - start)
        end
      end
    else
      @logger.debug "No disks to add for #{hostname}"
    end
  end
end

#wait_for_disk(hostname, disk_size, index) ⇒ Object 



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# File 'lib/beaker/hypervisor/vmpooler.rb', line 321

def wait_for_disk(hostname, disk_size, index)
  response = get_vm(hostname)
  parsed = parse_response(response)

  @logger.notify "Waiting for disk"

  attempts = 0

  while (!disk_added?(parsed[hostname], disk_size, index) && attempts < 20)
    sleep 10
    begin
      response = get_vm(hostname)
      parsed = parse_response(response)
    rescue RuntimeError, Errno::EINVAL, Errno::ECONNRESET, EOFError,
        Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, *SSH_EXCEPTIONS => e
      report_and_raise(@logger, e, "Vmpooler.wait_for_disk")
    end
    print "."
    attempts += 1
  end

  puts " "

  disk_added?(parsed[hostname], disk_size, index)
end