Class: Distem::Daemon::DistemCoordinator

Inherits:
Object
  • Object
show all
Defined in:
lib/distem/daemon/distemcoordinator.rb

Constant Summary

MAC_PREFIX =

See en.wikipedia.org/wiki/MAC_address#Address_details for allowed addresses

"fe:#{rand(256).to_s(16).rjust(2,"0")}:#{rand(256).to_s(16).rjust(2,"0")}"
WINDOW_SIZE = 
250
ADMIN_NETWORK_IP = 
'220.0.0.0/8'
ADMIN_NETWORK_NAME = 
'adm'
@@lockslock = 
Mutex.new
@@locks = 
{
  :vnetsync => {},
}
@@threads = 
{
  :pnode_init => {},
  :vnode_stop => {},
}
@@mac_id = 
0
@@mac_id_lock = 
Mutex.new
@@vxlan_id = 
0
@@vxlan_mcast_id = 
0
@@vxlan_id_lock = 
Mutex.new

Instance Attribute Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (DistemCoordinator) initialize(enable_admin_network = false, vxlan_id = 1)

Returns a new instance of DistemCoordinator



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# File 'lib/distem/daemon/distemcoordinator.rb', line 40

def initialize(enable_admin_network = false, vxlan_id = 1)
  #Thread::abort_on_exception = true
  @node_name = Socket::gethostname
  @daemon_resources = Resource::VPlatform.new
  @daemon_resources_lock = Mutex.new
  @vnet_id = 0
  @event_trace = Events::Trace.new
  @event_manager = Events::EventManager.new(@event_trace)
  @admin_network = nil
  # Since a vxlan_id is a 24 bits value, this allows to hage 16 instances of 2^20 vxlan networks
  @@vxlan_id = vxlan_id.to_i * 2**20
  @@vxlan_mcast_id = vxlan_id.to_i
  if enable_admin_network
    @admin_network = vnetwork_create(ADMIN_NETWORK_NAME, ADMIN_NETWORK_IP,
                                     {'network_type' => 'vxlan',
                                      'vxlan_id' => vxlan_id})
  end
end

Instance Attribute Details

- (Object) daemon_resources (readonly)

The VPlatform object that describes each resources in the experimental platform



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# File 'lib/distem/daemon/distemcoordinator.rb', line 15

def daemon_resources
  @daemon_resources
end

Instance Method Details

- (Object) event_manager_start

Start the churn



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1442

def event_manager_start
  @event_manager.run
end

- (Object) event_manager_stop

Stop the churn



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1447

def event_manager_stop
  @event_manager.stop
end

- (Object) event_random_add(resource_desc, event_type, generator_desc, first_value = nil)

Add an random generated event to a resource



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1436

def event_random_add(resource_desc, event_type, generator_desc, first_value = nil)
  event = Events::EventGenerator.new(resource_desc, event_type, generator_desc, first_value)
  @event_trace.add_event(event.get_next_date, event)
end

- (Object) event_trace_add(resource_desc, event_type, trace)

Add an event trace to a resource



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1421

def event_trace_add(resource_desc, event_type, trace)
  trace.to_a.each do |date, event_value|
    @event_trace.add_event(date.to_f, Events::Event.new(resource_desc, event_type, event_value))
  end
end

- (Object) event_trace_string_add(resource_desc, event_type, trace)

Add an event trace to a resource, from a string



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1428

def event_trace_string_add(resource_desc, event_type, trace)
  trace.strip.split(/\n+/).each do |trace_line|
    date, event_value = trace_line.split
    @event_trace.add_event(date.to_f, Events::Event.new(resource_desc, event_type, event_value))
  end
end

- (Object) pcpu_get(hostname, raising = true)

Get the description of the cpu of a physical node



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# File 'lib/distem/daemon/distemcoordinator.rb', line 287

def pcpu_get(hostname, raising = true)
  pnode = pnode_get(hostname)
  return pnode.cpu
end

- (Object) pmemory_get(hostname, raising = true)

Get the description of the memory of a physical node



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# File 'lib/distem/daemon/distemcoordinator.rb', line 293

def pmemory_get(hostname, raising = true)
  pnode = pnode_get(hostname)
  return pnode.memory
end

- (Object) pnode_create(targets, desc = {}, async = false)

Initialise a physical machine (launching daemon, creating cgroups, …) This step have to be performed to be able to create virtual nodes on a machine

Attributes

  • target the name/address of the physical machine

  • properties async,max_vifaces,cpu_algorithm

Returns

Resource::PNode object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 68

def pnode_create(targets,desc={},async=false)
  l = lambda { |target|
    begin
      async = parse_bool(async)
      pnode = @daemon_resources.get_pnode_by_address(target)
      pnode = Resource::PNode.new(target) unless pnode
      @daemon_resources.add_pnode(pnode)
      block = Proc.new {
        Admin.pnode_run_server(pnode)
        cl = NetAPI::Client.new(target, 4568)
        ret = cl.pnode_init(nil,desc,async)
        # here ret should always contains one element
        updateobj_pnode(pnode,ret)
        pnode.status = Resource::Status::RUNNING
        if @admin_network && (target == @node_name)
          vnetwork_sync(@admin_network,pnode)
        end
      }

      if async
        #thr = @@threads[:pnode_init][pnode.address.to_s] = Thread.new {
        @@threads[:pnode_init][pnode.address.to_s] = Thread.new {
          block.call
        }
        #thr.abort_on_exception = true
      else
        block.call
      end

      pnode_update(pnode.address.to_s,desc)
      return pnode
    rescue Lib::AlreadyExistingResourceError
      raise
    rescue Exception
      destroy(pnode) if pnode
      raise
    end
  }

  if targets.is_a?(Array) then
    threads_info = {}
    targets.each { |target|
      threads_info[target] = {}
      threads_info[target]['tid'] = Thread.new {
        threads_info[target]['ret'] = l.call(target)
      }
    }
    ret = []
    threads_info.each_value { |host|
      host['tid'].join
      ret << host['ret']
    }
    return ret
  else
    return [l.call(targets)]
  end
end

- (Object) pnode_get(hostname, raising = true)

Get the description of a virtual node

Attributes

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 193

def pnode_get(hostname, raising = true)
  pnode = nil

  hostname = '' unless hostname
  begin
    address = Resolv.getaddress(hostname)
  rescue Resolv::ResolvError
    raise Lib::InvalidParameterError, hostname
  end
  pnode = @daemon_resources.get_pnode_by_address(address)
  raise Lib::ResourceNotFoundError, hostname if raising and !pnode
  return pnode
end

- (Object) pnode_update(target, desc)

Update PNode properties



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# File 'lib/distem/daemon/distemcoordinator.rb', line 128

def pnode_update(target,desc)
  pnode = pnode_get(target)

  if desc['algorithms']
    if desc['algorithms']['cpu']
      algo = desc['algorithms']['cpu'].upcase
      raise InvalidParameterError "algorithms/cpu" unless \
      [Algorithm::CPU::GOV.upcase,
       Algorithm::CPU::HOGS.upcase].include?(algo)
      pnode.algorithms[:cpu] = algo
      return {'algorithms' => {'cpu'=> algo }}
    end
  end
end

- (Object) pnode_wait(target)

Wait for a PNode to be ready



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# File 'lib/distem/daemon/distemcoordinator.rb', line 144

def pnode_wait(target)
  pnode = pnode_get(target)

  @@threads[:pnode_init][pnode.address.to_s].join if \
  @@threads[:pnode_init][pnode.address.to_s]
end

- (Object) pnodes_delete_probes

Delete the probes on every PNode



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# File 'lib/distem/daemon/distemcoordinator.rb', line 257

def pnodes_delete_probes()
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.pnodes_delete_probes()
    }
    w.add(block)
  }
  w.run
end

- (Object) pnodes_get

Get the list of the the currently created physical nodes

Returns

Array of Resource::PNode objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 212

def pnodes_get()
  return @daemon_resources.pnodes
end

- (Object) pnodes_get_probes_data

Get the data collected bu the probes

Returns

Hash with one entry per probe. Every entry is an Array containing a time series



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# File 'lib/distem/daemon/distemcoordinator.rb', line 272

def pnodes_get_probes_data()
  result = {}
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      result[Resolv.getname(pnode.address)] = cl.pnodes_get_probes_data()
    }
    w.add(block)
  }
  w.run
  return result
end

- (Object) pnodes_launch_probes(desc, _)

Launch a set of probes on every PNode



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# File 'lib/distem/daemon/distemcoordinator.rb', line 217

def pnodes_launch_probes(desc,_)
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.pnodes_launch_probes(desc, Time.now.to_f)
    }
    w.add(block)
  }
  w.run
end

- (Object) pnodes_quit

Quit distem on all the physical machines (remove everything that was created)

Returns

Array of Resource::PNode objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 156

def pnodes_quit()
  ret = @daemon_resources.pnodes.dup
  first_node = Resolv.getaddress(@node_name).to_s
  tids = []

  distant_quit = lambda { |target|
    pnode = pnode_get(target,false)
    cl = NetAPI::Client.new(target, 4568)
    cl.pnode_quit(target)
    @daemon_resources.remove_pnode(pnode)
  }
  @daemon_resources.pnodes.each_value { |pnode|
    tids << Thread.new {
      pnode.status = Resource::Status::CONFIGURING
      vnodes = []
      @daemon_resources.vnodes.each_value { |vnode|
        if vnode.host != nil && (vnode.host.address.to_s == pnode.address.to_s)
          vnodes << vnode
        end
      }
      vn = vnodes.map { |vnode| vnode.name }
      vnodes_stop(vn, false)
      vnodes_remove(vn)

      distant_quit.call(pnode.address.to_s) if pnode.address.to_s != first_node
      pnode.status = Resource::Status::READY
    }
  }
  tids.each { |tid| tid.join }
  distant_quit.call(first_node)
  return ret
end

- (Object) pnodes_restart_probes

Restart the probes on every PNode



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# File 'lib/distem/daemon/distemcoordinator.rb', line 231

def pnodes_restart_probes()
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.pnodes_restart_probes()
    }
    w.add(block)
  }
  w.run
end

- (Object) pnodes_stop_probes

Stop the probes on every PNode



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# File 'lib/distem/daemon/distemcoordinator.rb', line 244

def pnodes_stop_probes()
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.pnodes_stop_probes()
    }
    w.add(block)
  }
  w.run
end

- (Object) set_global_arptable(param = nil, arp_file = nil) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1599

def set_global_arptable(param = nil, arp_file = nil)
  results = []
  @daemon_resources.vnodes.each_value {|vnode|
    vnode.vifaces.each {|viface|
      if viface.vnetwork
        results << viface.macaddress + " " + viface.address.address.to_s
      end
    }
  }
  data = Base64.encode64(Zlib::Deflate.deflate(results.join("\n")))
  arp_file = '/tmp/fullarptable'
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.set_global_arptable(data, arp_file)
    }
    w.add(block)
  }
  w.run
end

- (Object) set_global_etchosts(param = nil) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1569

def set_global_etchosts(param = nil)
  results = []
  @daemon_resources.vnodes.each_value {|vnode|
    vnode.vifaces.each do |viface|
      if viface.vnetwork
        if viface.default
          results << viface.address.address.to_s + " " + vnode.name
        end
        results << viface.address.address.to_s + " " + vnode.name + "-" + viface.vnetwork.name
      end
    end
  }
  data = Base64.encode64(Zlib::Deflate.deflate(results.join("\n")))
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  @daemon_resources.pnodes.each_value {|pnode|
    block = Proc.new {
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.set_global_etchosts(data)
    }
    w.add(block)
  }
  w.run
end

- (Object) set_peers_latencies(vnodes, matrix) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1525

def set_peers_latencies(vnodes, matrix)
  #sanity check
  if (vnodes.length == matrix.length)
    matrix.each { |row|
      if row.length != vnodes.length
        return false
      end
    }
  else
    return false
  end
  vnodesbyhost = {}
  #group vnodes by pnode
  vnodes.each { |name|
    vnode = vnode_get(name)
    vnode.status = Resource::Status::CONFIGURING
    host = vnode.host.address
    vnodesbyhost[host] = {} if !vnodesbyhost.has_key?(host)
    vnodesbyhost[host][vnode.name] = {}
    row = matrix[vnodes.index(name)]
    rules = {}
    (0...matrix.length).each { |i|
      if row[i] != 0
        dest_vnode = vnode_get(vnodes[i])
        rules[dest_vnode.vifaces[0].address.to_s] = row[i]
      end
    }
    vnodesbyhost[host][vnode.name] = vnode.vifaces[0].latency_filters = rules
  }
  tids = []
  vnodesbyhost.each_pair { |pnode,vnodeshash|
    tids << Thread.new {
      cl = NetAPI::Client.new(pnode, 4568)
      cl.set_peers_latencies(nil, vnodeshash)
    }
  }
  tids.each { |tid| tid.join }
  vnodes.each { |name|
    vnode = vnode_get(name)
    vnode.status = Resource::Status::RUNNING
  }
  return true
end

- (Object) vcpu_create(vnodename, desc)

Create a new virtual cpu on the targeted virtual node. By default all the virtual nodes on a same physical one are sharing available CPU resources, using this method you can allocate some cores to a virtual node and apply some limitations on them

Attributes

  • corenb the number of cores to allocate (need to have enough free ones on the physical node)

  • frequency (optional) the frequency each node have to be set (need to be lesser or equal than the physical core frequency). If the frequency is included in ]0,1] it'll be interpreted as a percentage of the physical core frequency, otherwise the frequency will be set to the specified number

Returns

Resource::VCPU object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1031

def vcpu_create(vnodename,desc)
  begin
    vnode = vnode_get(vnodename)

    downkeys(desc)

    corenb = nil
    val = nil
    unit = 'mhz'

    if desc['vcores']
      raise Lib::InvalidParameterError, 'vcores' unless desc['vcores'].is_a?(Array)
      val = desc['vcores'][0]['frequency']
      corenb = desc['vcores'].size
    else
      if desc['val']
        val = desc['val']
        unit = desc['unit'] if desc.has_key?('unit')
      else
        val = 1
        unit = 'ratio'
      end
      corenb = desc['corenb'].to_i || 1
    end

    vnode.add_vcpu(corenb,val,unit)

    vnode.vcpu.attach if vnode.host

    if vnode.status == Resource::Status::RUNNING
      vnode.status = Resource::Status::CONFIGURING
      cl = NetAPI::Client.new(vnode.host.address, 4568)
      cl.vcpu_update(vnode.name,val,unit)
      vnode.status = Resource::Status::RUNNING
    end

    return vnode.vcpu

  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    vnode.remove_vcpu() if vnode
    raise
  end
end

- (Object) vcpu_remove(vnodename)

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1117

def vcpu_remove(vnodename)
  vnode = vnode_get(vnodename)
  raise Lib::UninitializedResourceError, 'vcpu' unless vnode.vcpu
  vcpu = vnode.vcpu
  vnode.remove_vcpu()
  return vcpu
end

- (Object) vcpu_update(vnodename, desc) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1077

def vcpu_update(vnodename,desc)
  begin
    vnode = vnode_get(vnodename)
    raise Lib::UninitializedResourceError, 'vcpu' unless vnode.vcpu
    vcpu = vnode.vcpu
    downkeys(desc)

    val = nil
    unit = 'mhz'
    if desc['vcores']
      raise Lib::InvalidParameterError, 'vcores' unless desc['vcores'].is_a?(Array)
      val = desc['vcores'][0]['frequency']
    else
      if desc['val']
        val = desc['val']
        unit = desc['unit'] if desc.has_key?('unit')
      else
        val = 1
        unit = 'ratio'
      end
    end

    vcpu.update_vcores(val,unit)

    if vnode.status == Resource::Status::RUNNING
      vnode.status = Resource::Status::CONFIGURING
      cl = NetAPI::Client.new(vnode.host.address, 4568)
      cl.vcpu_update(vnode.name,val,unit)
      vnode.status = Resource::Status::RUNNING
    end

    return vnode.vcpu
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    vnode.remove_vcpu() if vnode
    raise
  end
end

- (Object) vfilesystem_create(vnodename, desc)

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1126

def vfilesystem_create(vnodename,desc)
  vnode = vnode_get(vnodename)
  raise Lib::AlreadyExistingResourceError, 'filesystem' if vnode.filesystem
  raise Lib::MissingParameterError, "filesystem/image" unless \
  desc['image']
  desc['shared'] = parse_bool(desc['shared'])
  desc['cow'] = parse_bool(desc['cow'])
  if desc.has_key?('disk_throttling') && desc['disk_throttling']
    desc['disk_throttling'].each_key { |k|
      raise Lib::InvalidParameterError, "filesystem/disk_throttling/#{k}" if !['device','read_limit', 'write_limit'].include?(k)
    }
    raise Lib::MissingParameterError, "filesystem/disk_throttling/device" if (desc['disk_throttling'].has_key?('read_limit') || desc['disk_throttling'].has_key?('write_limit')) && !desc['disk_throttling'].has_key?('device')
  else
    desc['disk_throttling'] = nil
  end
  vnode.filesystem = Resource::FileSystem.new(vnode,desc['image'],desc['shared'],desc['cow'],desc['disk_throttling'])
  return vnode.filesystem
end

- (Object) vfilesystem_get(vnodename)

Retrieve informations about the virtual node filesystem

Returns

Resource::FileSystem object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1160

def vfilesystem_get(vnodename)
  vnode = vnode_get(vnodename)
  raise Lib::UninitializedResourceError, "filesystem" unless \
  vnode.filesystem
  return vnode.filesystem
end

- (Object) vfilesystem_update(vnodename, desc)

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1145

def vfilesystem_update(vnodename,desc)
  vnode = vnode_get(vnodename)
  raise Lib::UninitializedResourceError, "filesystem" unless \
  vnode.filesystem
  vnode.filesystem.image = URI.encode(desc['image']) if desc['image']
  vnode.filesystem.shared = parse_bool(desc['shared']) if desc['shared']
  vnode.filesystem.cow = parse_bool(desc['cow']) if desc['cow']
  return vnode.filesystem
end

- (Object) viface_attach(vnodename, vifacename, desc)

Connect a virtual node on a virtual network specifying which of it's virtual interface to use The IP address is auto assigned to the virtual interface Dettach the virtual interface if properties is empty You can change the traffic specification on the fly, only specifying a vtraffic property

Attributes

  • vnodename The VNode name (String)

  • vifacename The VIface name (String)

  • properties the address or the vnetwork to connect the virtual interface with (JSON, 'address' or 'vnetwork'), the traffic the interface will have to emulate (not mandatory, JSON, 'vtraffic', INPUT/OUTPUT)

Usage

Returns

Resource::VIface object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 844

def viface_attach(vnodename,vifacename,desc)
  begin
    vnode = vnode_get(vnodename)
    viface = viface_get(vnodename,vifacename)

    downkeys(desc)

    desc['vnetwork'] = desc['vnetwork'].gsub(' ','_') if desc['vnetwork']

    raise Lib::MissingParameterError, "address|vnetwork" if \
    ((!desc['address'] or desc['address'].empty?) \
     and (!desc['vnetwork'] or desc['vnetwork'].empty?))

    vplatform = @daemon_resources

    address = ''
    if desc['address'] and !desc['address'].empty?
      begin
        address = IPAddress.parse(desc['address'])
      rescue ArgumentError
        raise Lib::InvalidParameterError, desc['address']
      end
      prop = desc['address']
      vnetwork = vplatform.get_vnetwork_by_address(prop)
    end

    if (!desc.has_key?('macaddress')) || (desc['macaddress'] == nil) || (desc['macaddress'] == '')
      @@mac_id_lock.synchronize {
        mac_suffix = [@@mac_id/65536, @@mac_id%65536/256, @@mac_id%65536%256].map {|i| i.to_s(16).rjust(2,"0")}.join(":")
        viface.macaddress = "#{MAC_PREFIX}:#{mac_suffix}"
        @@mac_id += 1
      }
    else
      if desc['macaddress'].match(/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$/)
        viface.macaddress = desc['macaddress']
      else
        raise Lib::InvalidParameterError, desc['macaddress']
      end
    end
    if desc['vnetwork'] and !desc['vnetwork'].empty?
      prop = desc['vnetwork']
      vnetwork = vplatform.get_vnetwork_by_name(prop)
    end
    raise Lib::ResourceNotFoundError, "vnetwork:#{prop}" unless vnetwork

    if desc['address']
      vnetwork.add_vnode(vnode,viface,address)
    else
      vnetwork.add_vnode(vnode,viface)
    end

    desc.delete('address')
    desc.delete('vnetwork')
    vtraffic_update(vnode.name,viface.name,desc) unless desc.empty?

    return viface
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    vnetwork.remove_vnode(vnode) if vnetwork
    raise
  end
end

- (Object) viface_create(vnodename, vifacename, desc)

Create a new virtual interface on the targeted virtual node (without attaching it to any network -> no ip address)

Attributes

  • name the name of the virtual interface (need to be unique on this virtual node)

Returns

Resource::VIface object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 780

def viface_create(vnodename,vifacename,desc)
  begin
    vifacename = vifacename.gsub(' ','_')
    vnode = vnode_get(vnodename)
    downkeys(desc)
    default = desc.has_key?('default') ? desc['default'] : false
    viface = Resource::VIface.new(vifacename,vnode,default)
    vnode.add_viface(viface)
    viface_update(vnode.name,viface.name,desc)
    return viface
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    vnode.remove_viface(viface) if vnode and viface
    raise
  end
end

- (Object) viface_detach(vnodename, vifacename)

Disconnect a virtual network interface from every networks it's connected to

Attributes

  • vnodename The VNode name (String)

  • vifacename The VIface name (String)

Returns

Resource::PNode object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 916

def viface_detach(vnodename,vifacename)
  viface = viface_get(vnodename,vifacename)
  viface.detach()

  return viface
end

- (Object) viface_get(vnodename, vifacename, raising = true)

Get the description of a virtual network interface

Returns

Resource::VIface object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 928

def viface_get(vnodename,vifacename,raising = true)
  vifacename = vifacename.gsub(' ','_')
  vnode = vnode_get(vnodename,raising)
  viface = vnode.get_viface_by_name(vifacename)

  raise Lib::ResourceNotFoundError, vifacename if raising and !viface

  return viface
end

- (Object) viface_remove(vnodename, vifacename)

Remove the virtual interface

Returns

Resource::VIface object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 803

def viface_remove(vnodename,vifacename)
  vnode = vnode_get(vnodename)
  @daemon_resources_lock.synchronize {
    vnode.host.local_vifaces -= 1 if vnode.host
  }
  viface = viface_get(vnodename,vifacename)
  viface_detach(vnode.name,viface.name)
  vnode.remove_viface(viface)

  return viface
end

- (Object) viface_update(vnodename, vifacename, desc) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 815

def viface_update(vnodename,vifacename,desc)
  ret = nil
  downkeys(desc)
  if !desc or desc.empty?
    ret = viface_detach(vnodename,vifacename)
  else
    if (desc.keys - ['input'] - ['output']).size == 0
      #only vtraffic change
      ret = vtraffic_update(vnodename,vifacename,desc)
    else
      ret = viface_attach(vnodename,vifacename,desc)
    end
  end
  return ret
end

- (Object) vinput_get(vnodename, vifacename, raising = true)

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 959

def vinput_get(vnodename,vifacename, raising = true)
  viface = viface_get(vnodename,vifacename)

  raise Lib::UninitializedResourceError, 'input' if raising and !viface.vinput

  return viface.vinput
end

- (Object) vinput_update(vnodename, vifacename, desc) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 967

def vinput_update(vnodename,vifacename,desc)
  vnode = vnode_get(vnodename)
  viface = viface_get(vnodename,vifacename)

  downkeys(desc)

  if desc and !desc.empty?
    viface.vinput = Resource::VIface::VTraffic.new(viface,
                                                   Resource::VIface::VTraffic::Direction::INPUT,desc)
  else
    viface.vinput = nil
  end

  if vnode.status == Resource::Status::RUNNING
    vnode.status = Resource::Status::CONFIGURING
    cl = NetAPI::Client.new(vnode.host.address, 4568)
    cl.vinput_update(vnode.name,viface.name,desc)
    vnode.status = Resource::Status::RUNNING
  end

  return viface.vinput
end

- (Object) vmem_create(vnodename, opts) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1593

def vmem_create(vnodename, opts)
  vnode = vnode_get(vnodename)
  vnode.add_vmem(opts)
  return opts
end

- (Object) vnetwork_create(name, address, opts = nil)

Create a new virtual network specifying his range of IP address (IPv4 atm).

Attributes

  • name the -unique- name of the virtual network (it will be used in a lot of methods)

  • address the address in the CIDR (10.0.0.1/24) or IP/NetMask (10.0.0.1/255.255.255.0) format

  • opts

Returns

Resource::VNetwork object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1252

def vnetwork_create(name,address,opts=nil)
  begin
    if name
      name = name.gsub(' ','_')
    else
      name = "vnetwork#{@vnet_id}"
      @vnet_id += 1
    end
    if !opts
      opts = {}
    end
    if opts.has_key?('network_type')
      raise Lib::InvalidParameterError, opts['network_type'] if !['classical','vxlan'].include?(opts['network_type'])
    else
      opts['network_type'] = 'classical'
    end

    if opts['network_type'] == 'vxlan'
      opts['vxlan_id'] = @@vxlan_id
      @@vxlan_id_lock.synchronize {
        @@vxlan_id += 1
      }
      opts['vxlan_mcast_id'] = @@vxlan_mcast_id
    end
    vnetwork = Resource::VNetwork.new(address, name, @daemon_resources.pnodes.length, opts)
    @daemon_resources.add_vnetwork(vnetwork)
    return vnetwork
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    destroy(vnetwork) if vnetwork
    raise
  end
end

- (Object) vnetwork_get(name, raising = true)

Get the description of a virtual network

Returns

Resource::VNetwork object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1323

def vnetwork_get(name,raising = true)
  name = name.gsub(' ','_')
  vnetwork = @daemon_resources.get_vnetwork_by_name(name)
  raise Lib::ResourceNotFoundError, name if raising and !vnetwork
  return vnetwork
end

- (Object) vnetwork_remove(name)

Delete the virtual network

Returns

Resource::VNetwork object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1292

def vnetwork_remove(name)
  vnetwork = vnetwork_get(name)
  vnetwork.vnodes.each_pair do |vnode,viface|
    viface_detach(vnode.name,viface.name)
  end
  @daemon_resources.remove_vnetwork(vnetwork)
  vnetwork.visibility.each do |pnode|
    if (pnode.status == Resource::Status::RUNNING)
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      cl.vnetwork_remove(vnetwork.name)
    end
  end
  return vnetwork
end

- (Object) vnetwork_sync(vnet, pnode, lock = true) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1211

def vnetwork_sync(vnet, pnode, lock=true)
  block = Proc.new do
    if !vnet.visibility.include?(pnode)
      vnet.visibility << pnode
      cl = NetAPI::Client.new(pnode.address.to_s, 4568)
      # Adding VNetwork on the pnode
      opts = vnet.opts
      opts['nb_pnodes'] = @daemon_resources.pnodes.length
      opts['pnode_index'] = @daemon_resources.pnodes.keys.index(pnode.address.to_s)
      cl.vnetwork_create(vnet.name,vnet.address.to_string,opts)
      # Adding VRoutes to the new VNetwork
      vnet.vroutes.values.each do |vroute|
        vnetwork_sync(vroute.dstnet,pnode,false)
        cl.vroute_create(vnet.name,vroute.dstnet.name,vroute.gw.to_s)
      end
    end
  end

  if lock
    @@lockslock.synchronize {
      @@locks[:vnetsync][pnode] = Mutex.new unless \
      @@locks[:vnetsync][pnode]
    }

    @@locks[:vnetsync][pnode].synchronize do
      block.call
    end
  else
    block.call
  end
end

- (Object) vnetworks_get

Get the list of the the currently created virtual networks

Returns

Array of Resource::VNetwork objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1335

def vnetworks_get()
  return @daemon_resources.vnetworks
end

- (Object) vnetworks_remove

Delete every virtual networks

Returns

Array of Resource::VNetwork objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1312

def vnetworks_remove()
  vnetworks = @daemon_resources.vnetworks
  vnetworks.each_value { |vnetwork| vnetwork_remove(vnetwork.name) }
  return vnetworks
end

- (Object) vnode_attach(name, host) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 439

def vnode_attach(name,host)
  vnode = vnode_get(name)
  pnode = @daemon_resources.get_pnode_by_address(host)
  if pnode
    raise Lib::UninitializedResourceError, pnode.address.to_s unless \
    pnode.status == Resource::Status::RUNNING
  else
    raise Lib::ResourceNotFoundError host if host
  end

  if vnode.host and vnode.status == Resource::Status::RUNNING
    raise Lib::AlreadyExistingResourceError, 'host'
  else
    vnode.host = pnode
  end

  return vnode
end

- (Object) vnode_create(names, desc, ssh_key = {}, async = false)

Create a virtual node using a compressed file system image.

Attributes

  • name the -unique- name of the virtual node to create (it will be used in a lot of methods)

  • properties target,image,async,fs_shared,ssh_key

Returns

Resource::VNode object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 327

def vnode_create(names,desc,ssh_key={},async=false)
  begin
    async = parse_bool(async)
    downkeys(desc)
    raise Lib::ArgumentMissingError "names" if !names
    names = [names] if !names.is_a?(Array)
    names = names.map { |name| name.gsub(' ','_') }
    vnodes = []
    names.each { |name|
      vnode = Resource::VNode.new(name,ssh_key)
      @daemon_resources.add_vnode(vnode)
      vnodes << vnode
    }
    # Creation of an interface connected to the administration network
    if @admin_network
      desc['vifaces'] = [] if !desc.has_key?('vifaces')
      desc['vifaces'] << { 'name' => 'ifadm', 'vnetwork' => ADMIN_NETWORK_NAME } if desc['vifaces'].select {|viface| viface['vnetwork'] == ADMIN_NETWORK_NAME}.empty?
    end
    vnode_update(names,desc,async)
    return vnodes
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    raise
  end

end

- (Object) vnode_execute(vnodename, command)

Execute and get the result of a command on a virtual node

Attributes

  • command the command to be executed

Returns

Hash object: { 'command' => <the command that was executed>, 'result' => <the result of the command> }

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1174

def vnode_execute(vnodename,command)
  ret = ""
  # >>> TODO: check if vnode exists
  vnode = vnode_get(vnodename)
  raise unless vnode
  raise Lib::UninitializedResourceError, vnode.name unless \
  vnode.status == Resource::Status::RUNNING
  ret = Daemon::Admin.vnode_run(vnode,command)

  return ret
end

- (Object) vnode_get(name, raising = true)

Get the description of a virtual node

Returns

Resource::VNode object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 463

def vnode_get(name, raising = true)
  name = name.gsub(' ','_')
  vnode = @daemon_resources.get_vnode(name)
  raise Lib::ResourceNotFoundError, name if raising and !vnode
  return vnode
end

- (Object) vnode_get_info(vnodename)

Get the description of a vnode



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# File 'lib/distem/daemon/distemcoordinator.rb', line 299

def vnode_get_info(vnodename)
  vnode = vnode_get(vnodename).dup
  if vnode.filesystem && vnode.filesystem.image
    vnode.filesystem.image = CGI.unescape(vnode.filesystem.image)
  end
  return vnode
end

- (Object) vnode_mode_update(name, mode)

Change the mode of a virtual node (normal or gateway)

Attributes

  • mode “Normal” or “Gateway”

Returns

Resource::VNode object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 748

def vnode_mode_update(name,mode)
  vnode = vnode_get(name)

  case mode.upcase
  when Resource::VNode::MODE_GATEWAY.upcase
    vnode.gateway = true
  when Resource::VNode::MODE_NORMAL.upcase
    vnode.gateway = false
  else
    raise Lib::InvalidParameterError, "mode:#{mode}"
  end

  return vnode
end

- (Object) vnode_remove(names)

Remove the virtual node (“Cascade” removing -> remove all the vroutes it apears as gateway)

Returns

Resource::VNode object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 397

def vnode_remove(names)
  names = [names] if !names.is_a?(Array)
  vnodes = names.map { |name| vnode_get(name) }
  ret = vnodes.dup
  vnodes_to_remove = []
  vnodes.each { |vnode|
    raise Lib::BusyResourceError, "#{vnode.name}/running" if vnode.status == Resource::Status::RUNNING
    vnode.vifaces.each { |viface| viface_remove(vnode.name,viface.name) }
    @daemon_resources_lock.synchronize {
      vnode.remove_vcpu()
      vnode.remove_vmem() if vnode.vmem
    }
    vnodes_to_remove << vnode if vnode.host
    @daemon_resources.remove_vnode(vnode)
  }
  vnodesperpnode = Hash.new
  vnodes_to_remove.each { |vnode|
    vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
    vnodesperpnode[vnode.host.address.to_s] << vnode
  }
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  vnodesperpnode.each { |address,vn|
    block = Proc.new {
      cl = NetAPI::Client.new(address, 4568)
      cl.vnodes_remove(vn)
    }
    w.add(block)
  }
  w.run
  return ret
end

- (Object) vnode_start(names, async = false)

Same as vnode_set_status(name,Resource::Status::RUNNING,properties)



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# File 'lib/distem/daemon/distemcoordinator.rb', line 498

def vnode_start(names,async=false)
  async = parse_bool(async)
  vnodes = []
  vnodes_previous_status = {}
  names.each { |name|
    vnode = vnode_get(name)
    raise Lib::BusyResourceError, vnode.name if \
    vnode.status == Resource::Status::CONFIGURING

    raise Lib::ResourceError, "#{vnode.name} already running" if \
    vnode.status == Resource::Status::RUNNING
    vnodes_previous_status[name] = vnode.status

    vnode.status = Resource::Status::CONFIGURING
    if (vnodes_previous_status[name] != Resource::Status::DOWN)
      @daemon_resources_lock.synchronize {
        if vnode.host
          if ((vnode.host.local_vifaces + vnode.vifaces.length) > Node::Admin.vifaces_max)
            raise Lib::UnavailableResourceError, "Maximum ifaces number of #{Node::Admin.vifaces_max} reached"
          else
            vnode.host.local_vifaces += vnode.vifaces.length
          end
        else
          vnode.host = @daemon_resources.get_pnode_available(vnode)
        end
        vnode.host.memory.allocate({:mem => vnode.vmem.mem, :swap => vnode.vmem.swap}) if vnode.vmem
        vnode.vcpu.attach if vnode.vcpu and !vnode.vcpu.attached?
      }
    end
    vnodes << vnode
  }
  vnodesperpnode = Hash.new
  vnodes.each { |vnode|
    vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
    vnodesperpnode[vnode.host.address.to_s] << vnode
  }
  blocks = []
  vnodesperpnode.each { |address,vn|
    blocks << Proc.new {
      vnodes_to_start = vn.map { |vnode| vnode if (vnodes_previous_status[vnode.name] == Resource::Status::DOWN) }.compact
      vnodes_to_create = vn.map { |vnode| vnode if (vnodes_previous_status[vnode.name] != Resource::Status::DOWN) }.compact
      cl = NetAPI::Client.new(address, 4568)
      ret = nil
      if vnodes_to_start
        # Just restart the node
        n = vnodes_to_start.map { |vnode| vnode.name }
        ret = cl.vnodes_start(n, async)
        vnodes_to_start.each_index { |i|
          updateobj_vnode(vnodes_to_start[i],ret[i])
          vnodes_to_start[i].status = Resource::Status::RUNNING
        }
      end
      if vnodes_to_create
        descs = []
        # Create VNetworks on remote PNode
        # TODO: vectorize vnetwork_sync
        vnodes_to_create.each { |vnode|
          vnode.get_vnetworks.each do |vnet|
            vnetwork_sync(vnet,vnode.host)
          end
          desc = TopologyStore::HashWriter.new.visit(vnode)
          desc['status'] = Resource::Status::RUNNING
          descs << desc
        }

        n = vnodes_to_create.map { |vnode| vnode.name }
        # we want the node to be runned
        ret = cl.vnodes_create(n,descs)
        vnodes_to_create.each_index { |i|
          updateobj_vnode(vnodes_to_create[i],ret[i])
          vnodes_to_create[i].status = Resource::Status::RUNNING
        }
      end
    }
  }

  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  if async
    thr = Thread.new {
      blocks.each { |block|
        w.add(block)
      }
      w.run
    }
    thr.abort_on_exception = true
  else
    blocks.each { |block|
      w.add(block)
    }
    w.run
  end

  return vnodes
end

- (Object) vnode_status_update(names, status, async = false)

Change the status of the -previously created- virtual node.

Attributes

  • status the status to set: “Running” or “Down”

  • properties async

Returns

Resource::VNode object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 479

def vnode_status_update(names,status,async=false)
  async = parse_bool(async)
  vnodes = []
  raise Lib::InvalidParameterError, status unless \
  Resource::Status.valid?(status)
  if status.upcase == Resource::Status::RUNNING
    vnodes = vnodes_start(names,async)
  elsif status.upcase == Resource::Status::DOWN
    vnodes = vnodes_stop(names,async)
  elsif status.upcase == Resource::Status::INIT
    #Just do nothing
  else
    raise Lib::InvalidParameterError, status
  end

  return vnodes
end

- (Object) vnode_stop(names, async = false)

Same as vnode_set_status(name,Resource::Status::DOWN,properties)



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# File 'lib/distem/daemon/distemcoordinator.rb', line 599

def vnode_stop(names, async=false)
  async = parse_bool(async)
  names = [names] if !names.is_a?(Array)
  vnodes = names.map { |name| vnode_get(name) }
  status = {}

  vnodes.each { |vnode|
    status[vnode.name] = vnode.status
    raise Lib::BusyResourceError, vnode.name if vnode.status == Resource::Status::CONFIGURING
#          raise Lib::UninitializedResourceError, vnode.name if vnode.status == Resource::Status::INIT
    vnode.status = Resource::Status::CONFIGURING
  }
  block = Proc.new {
    vnodesperpnode = Hash.new
    vnodes.each { |vnode|
      #Discard vnodes that are not yet initialized
      if status[vnode.name] != Resource::Status::INIT
        vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
        vnodesperpnode[vnode.host.address.to_s] << vnode
      end
    }
    w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
    vnodesperpnode.each { |address,vn|
      sub_block = Proc.new {
        n = vn.map { |vnode| vnode.name }
        Distem.client(address, 4568) do |cl|
          cl.vnodes_stop(n,false)
        end
      }
      w.add(sub_block)
    }
    w.run
    vnodes.each { |vnode|
      vnode.status = Resource::Status::DOWN
    }
  }
  if async
    thr = Thread.new {
      block.call
    }
    thr.abort_on_exception = true
  else
      block.call
  end
  return vnodes
end

- (Object) vnode_update(names, description, async = false)

Update the vnode resource



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# File 'lib/distem/daemon/distemcoordinator.rb', line 356

def vnode_update(names,description,async=false)
  async = parse_bool(async)
  names = [names] if !names.is_a?(Array)
  vnodes = []
  downkeys(description)
  names.each { |name|
    desc = Marshal.load(Marshal.dump(description))
    vnode = vnode_get(name)
    vnode.sshkey = desc['ssh_key'] if desc['ssh_key'] and \
    (desc['ssh_key'].is_a?(Hash) or desc['ssh_key'].nil?)
    vnode_attach(vnode.name,desc['host']) if desc['host']
    vfilesystem_create(vnode.name,desc['vfilesystem']) if desc['vfilesystem']
    if desc['vcpu']
      if vnode.vcpu
        vcpu_update(vnode.name,desc['vcpu'])
      else
        vcpu_create(vnode.name,desc['vcpu'])
      end
    end
    if desc['vifaces']
      desc['vifaces'].each do |ifdesc|
        if vnode.get_viface_by_name(ifdesc['name'])
          viface_update(vnode.name,ifdesc['name'],ifdesc)
        else
          viface_create(vnode.name,ifdesc['name'],ifdesc)
        end
      end
    end
    vmem_create(vnode.name, desc['vmem']) if desc['vmem']
    vnode_mode_update(vnode.name,desc['mode']) if desc['mode']
    vnodes << vnode
  }
  vnode_status_update(names,description['status'],async) if description['status']
  return vnodes
end

- (Object) vnodes_execute(names, command) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1186

def vnodes_execute(names, command)
  names = [names] if !names.is_a?(Array)
  vnodes = names.map { |name| vnode_get(name) }
  ret = {}
  vnodesperpnode = Hash.new
  vnodes.each { |vnode|
    vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
    vnodesperpnode[vnode.host.address.to_s] << vnode
  }
  tmp_ret = {}
  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  vnodesperpnode.each { |address,vn|
    sub_block = Proc.new {
      n = vn.map { |vnode| vnode.name }
      Distem.client(address, 4568) do |cl|
        tmp_ret[address] = cl.vnodes_execute(n, command)
      end
    }
    w.add(sub_block)
  }
  w.run
  tmp_ret.each_value {|v| ret.merge!(v)}
  return ret
end

- (Object) vnodes_freeze(names, async = false) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 652

def vnodes_freeze(names, async=false)
  async = parse_bool(async)

  vnodes = names.map { |name| vnode_get(name) }
  vnodes.each { |vnode|
    raise Lib::BusyResourceError, vnode.name if vnode.status == Resource::Status::CONFIGURING
    raise Lib::UninitializedResourceError, vnode.name if vnode.status == Resource::Status::INIT
    vnode.status = Resource::Status::CONFIGURING
  }

  block = Proc.new {
    vnodesperpnode = Hash.new
    vnodes.each { |vnode|
      vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
      vnodesperpnode[vnode.host.address.to_s] << vnode
    }
    w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
    vnodesperpnode.each { |address,vn|
      sub_block = Proc.new {
        n = vn.map { |vnode| vnode.name }
        Distem.client(address, 4568) do |cl|
          cl.vnodes_freeze(n, async)
        end
      }
      w.add(sub_block)
    }
    w.run

    vnodes.each { |vnode|
      vnode.status = Resource::Status::FROZEN
    }
  }

  if async
    thr = Thread.new {
      block.call
    }
    thr.abort_on_exception = true
  else
    block.call
  end

  return vnodes
end

- (Object) vnodes_get

Get the list of the the currently created virtual nodes

Returns

Array of Resource::PNode objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 768

def vnodes_get()
  return @daemon_resources.vnodes
end

- (Object) vnodes_get_info

Get the description of the vnodes



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# File 'lib/distem/daemon/distemcoordinator.rb', line 308

def vnodes_get_info()
  vnodes = vnodes_get().dup
  vnodes.each_value { |vnode|
    if vnode.filesystem && vnode.filesystem.image
      vnode.filesystem.image = CGI.unescape(vnode.filesystem.image)
    end
  }
  return vnodes
end

- (Object) vnodes_remove(names)

Remove the given virtual nodes, or every if names is nil

Returns

Array of Resource::PNode objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 434

def vnodes_remove(names)
  names = @daemon_resources.vnodes.keys if !names
  return vnode_remove(names)
end

- (Object) vnodes_start(names, async = false) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 593

def vnodes_start(names, async=false)
  async = parse_bool(async)
  return vnode_start(names, async)
end

- (Object) vnodes_stop(names, async = false) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 646

def vnodes_stop(names, async=false)
  async = parse_bool(async)
  names = @daemon_resources.vnodes if !names
  return vnode_stop(names,async)
end

- (Object) vnodes_unfreeze(names, async = false) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 697

def vnodes_unfreeze(names, async=false)
  async = parse_bool(async)

  vnodes = names.map { |name| vnode_get(name) }
  vnodes.each { |vnode|
    raise Lib::BusyResourceError, vnode.name if vnode.status != Resource::Status::FROZEN
    vnode.status = Resource::Status::CONFIGURING
  }

  block = Proc.new {
    vnodesperpnode = Hash.new
    vnodes.each { |vnode|
      vnodesperpnode[vnode.host.address.to_s] = [] if !vnodesperpnode.has_key?(vnode.host.address.to_s)
      vnodesperpnode[vnode.host.address.to_s] << vnode
    }
    w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
    vnodesperpnode.each { |address,vn|
      sub_block = Proc.new {
        n = vn.map { |vnode| vnode.name }
        Distem.client(address, 4568) do |cl|
          cl.vnodes_unfreeze(n, async)
        end
      }
      w.add(sub_block)
    }
    w.run

    vnodes.each { |vnode|
      vnode.status = Resource::Status::RUNNING
    }
  }

  if async
    thr = Thread.new {
      block.call
    }
    thr.abort_on_exception = true
  else
    block.call
  end

  return vnodes
end

- (Object) voutput_get(vnodename, vifacename, raising = true)

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 990

def voutput_get(vnodename,vifacename, raising = true)
  viface = viface_get(vnodename,vifacename)

  raise Lib::UninitializedResourceError, 'voutput' if raising and !viface.voutput

  return viface.voutput
end

- (Object) voutput_update(vnodename, vifacename, desc) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 998

def voutput_update(vnodename,vifacename,desc)
  vnode = vnode_get(vnodename)
  viface = viface_get(vnodename,vifacename)

  downkeys(desc)

  if desc and !desc.empty?
    viface.voutput = Resource::VIface::VTraffic.new(viface,
                                                    Resource::VIface::VTraffic::Direction::OUTPUT,desc)
  else
    viface.voutput = nil
  end

  if vnode.status == Resource::Status::RUNNING
    vnode.status = Resource::Status::CONFIGURING
    cl = NetAPI::Client.new(vnode.host.address, 4568)
    cl.voutput_update(vnode.name,viface.name,desc)
    vnode.status = Resource::Status::RUNNING
  end

  return viface.voutput
end

- (Object) vplatform_create(format, data, rootfs = nil)

Load a configuration

Attributes

  • data data to be applied

  • format the format of the data

  • rootfs the rootfs to boot vnodes

Returns

Resource::VPlatform object

Exceptions

Raises:



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1460

def vplatform_create(format,data,rootfs=nil)
  # >>> TODO: check if there is already a created vplatform
  raise Lib::MissingParameterError, 'data' unless data
  parser = nil
  desc = {}
  case format.upcase
  when 'JSON'
    desc = JSON.parse(data)
  when 'SIMGRID'
    raise Lib::MissingParameterError, 'rootfs' unless rootfs
    parser = TopologyStore::SimgridReader.new(rootfs)
    desc = parser.parse(data)
  else
    raise Lib::InvalidParameterError, format
  end
  # Creating vnetworks
  if desc['vplatform']['vnetworks']
    desc['vplatform']['vnetworks'].each do |v|
      vnetdesc = v[1]
      vnetwork_create(vnetdesc['name'],vnetdesc['address'])
    end
  end
  # Creating the vnodes
  if desc['vplatform']['vnodes']
    desc['vplatform']['vnodes'].each do |v|
      vnodedesc = v[1]
      vnode_create([vnodedesc['name']], vnodedesc).first
    end
  end
  # Creating VRoutes
  #vroute_complete()
  if desc['vplatform']['vnetworks']
    desc['vplatform']['vnetworks'].each do |v|
      vnetdesc = v[1]
      if vnetdesc['vroutes']
        vnetdesc['vroutes'].each do |vr|
          vroutedesc = vr[1]
          vroute_create(vroutedesc['networksrc'],vroutedesc['networkdst'],
                        vroutedesc['gateway'])
        end
      end
    end
  end
  return @daemon_resources
end

- (Object) vplatform_get

Get the description file of the current platform in a specified format (JSON if not specified)

Returns

String value that reprents the platform in the format form

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1511

def vplatform_get()
  visitor = TopologyStore::HashWriter.new
  h = visitor.visit(@daemon_resources)
  if h["vplatform"]["vnodes"] && !h["vplatform"]["vnodes"].empty?
    h["vplatform"]["vnodes"].each { |v|
      vnode = v[1]
      if vnode["vfilesystem"]["image"]
        vnode["vfilesystem"]["image"] = CGI.unescape(vnode["vfilesystem"]["image"])
      end
    }
  end
  return JSON.pretty_generate(h)
end

- (Object) vroute_complete

Try to create every possible virtual routes between the current set of virtual nodes automagically finding and setting up the gateways to use

Returns

Array of Resource::VRoute objects

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1405

def vroute_complete()
  ret = []
  # >>> TODO: Use vnetworks_get
  @daemon_resources.vnetworks.each_value do |srcnet|
    @daemon_resources.vnetworks.each_value do |destnet|
      next if (srcnet == destnet) or (srcnet == @admin_network) or (destnet == @admin_network)
      gw = srcnet.perform_vroute(destnet,@admin_network)
      if gw
        vnode_mode_update(gw.name,Resource::VNode::MODE_GATEWAY) unless gw.gateway
        ret << vroute_create(srcnet.name,destnet.name,gw.name)
      end
    end
  end
end

- (Object) vroute_create(networksrc, networkdst, nodegw)

Create a virtual route (“go from <networkname> to <destnetwork> via <gatewaynode>”). The virtual route is applied to all the vnodes of <networkname>. This method automagically set <gatewaynode> in gateway mode (if it's not already the case) and find the right virtual interface to set the virtual route on

Attributes

  • destnetwork the name of the destination network

  • gatewaynode the name of the virtual node to use as a gateway

Deprecated: * vnode the virtual node to set the virtual route on (optional)

Returns

Resource::VRoute object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1350

def vroute_create(networksrc,networkdst,nodegw)
  begin
    srcnet = vnetwork_get(networksrc)
    raise Lib::ResourceNotFoundError, networksrc unless srcnet
    destnet = vnetwork_get(networkdst)
    raise Lib::ResourceNotFoundError, networkdst unless destnet
    found = false
    if IPAddress.valid?(nodegw)
      @daemon_resources.vnodes.each_value { |vnode|
        vnode.vifaces.each { |viface|
          if viface.address.address == nodegw
            nodegw = vnode.name
            found = true
            break
          end
        }
        break if found
      }
    end
    gw = vnode_get(nodegw)
    raise Lib::ResourceNotFoundError, nodegw unless gw
    gwaddr = gw.get_viface_by_network(srcnet)
    gwaddr = gwaddr.address if gwaddr
    raise Lib::InvalidParameterError, nodegw unless gwaddr
    vroute = srcnet.get_vroute(destnet)
    unless vroute
      vroute = Resource::VRoute.new(srcnet,destnet,gwaddr)
      srcnet.add_vroute(vroute)
    end
    raise Lib::InvalidParameterError, "#{gw.name}->#{srcnet}" unless gw.connected_to?(srcnet)
    vnode_mode_update(gw.name,Resource::VNode::MODE_GATEWAY) unless gw.gateway
    srcnet.visibility.each do |pnode|
      if (pnode.status == Resource::Status::RUNNING)
        cl = NetAPI::Client.new(pnode.address.to_s, 4568)
        vnetwork_sync(destnet,pnode)
        cl.vroute_create(srcnet.name,destnet.name,gwaddr.to_s)
      end
    end
    return vroute
  rescue Lib::AlreadyExistingResourceError
    raise
  rescue Exception
    destroy(vroute) if srcnet
    raise
  end
end

- (Object) vtraffic_update(vnodename, vifacename, desc)

Configure the virtual traffic on a virtual network interface, replacing previous values

Attributes

  • vnodename The VNode name (String)

  • vifacename The VIface name (String)

  • desc Hash that represents the VTraffic description (see Lib::Validator)

Returns

Resource::VIface object

Exceptions



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# File 'lib/distem/daemon/distemcoordinator.rb', line 947

def vtraffic_update(vnodename,vifacename,desc)
  vnode = vnode_get(vnodename)
  viface = viface_get(vnodename,vifacename)

  downkeys(desc)

  voutput_update(vnode.name,viface.name,desc['output']) if desc['output']
  vinput_update(vnode.name,viface.name,desc['input']) if desc['input']

  return viface
end

- (Object) wait_vnodes(opts) 



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# File 'lib/distem/daemon/distemcoordinator.rb', line 1621

def wait_vnodes(opts)
  vnodes = nil
  timeout = 600
  port = 22
  if opts
    if opts.has_key?('vnodes') && (opts['vnodes'] != nil)
      vnodes = opts['vnodes'].is_a?(Array) ? opts['vnodes'] : [ opts['vnodes'] ]
    end
    if opts.has_key?('timeout') && (opts['timeout'] != nil)
      timeout = opts['timeout']
    end
    if opts.has_key?('port') && (opts['port'] != nil)
      port = opts['port']
    end
  end

  vnodesbyhost = nil
  #group vnodes by pnode
  if vnodes
    vnodesbyhost = {}
    vnodes.each { |name|
      vnode = vnode_get(name)
      host = vnode.host.address.to_s
      vnodesbyhost[host] = [] if !vnodesbyhost.has_key?(host)
      vnodesbyhost[host] << vnode.name
    }
  end

  w = Distem::Lib::Synchronization::SlidingWindow.new(WINDOW_SIZE)
  ret = {}
  if vnodesbyhost
    vnodesbyhost.each_pair { |pnodeaddress,vn|
      block = Proc.new {
        cl = NetAPI::Client.new(pnodeaddress, 4568)
        ret[pnodeaddress] = cl.wait_vnodes({'port' => port, 'vnodes' => vn, 'timeout' => timeout})
      }
      w.add(block)
    }
  else
    @daemon_resources.pnodes.each_value {|pnode|
      block = Proc.new {
        cl = NetAPI::Client.new(pnode.address.to_s, 4568)
        ret[pnode.address.to_s] = cl.wait_vnodes({'port' => port, 'vnodes' => nil, 'timeout' => timeout})
      }
      w.add(block)
    }
  end
  w.run

  return ret.values.include?(false) ? ['false'] : ['true']
end