mirror of
https://github.com/OpenNebula/one.git
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319 lines
9.4 KiB
C++
319 lines
9.4 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2014, OpenNebula Project (OpenNebula.org), C12G Labs */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef TRANSFER_MANAGER_H_
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#define TRANSFER_MANAGER_H_
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#include "MadManager.h"
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#include "ActionManager.h"
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#include "VirtualMachinePool.h"
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#include "LifeCycleManager.h"
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#include "TransferManagerDriver.h"
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using namespace std;
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extern "C" void * tm_action_loop(void *arg);
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class TransferManager : public MadManager, public ActionListener
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{
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public:
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TransferManager(
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VirtualMachinePool * _vmpool,
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HostPool * _hpool,
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vector<const Attribute*>& _mads):
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MadManager(_mads),
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vmpool(_vmpool),
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hpool(_hpool)
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{
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am.addListener(this);
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};
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~TransferManager(){};
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enum Actions
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{
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PROLOG,
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PROLOG_MIGR,
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PROLOG_RESUME,
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EPILOG,
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EPILOG_STOP,
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EPILOG_DELETE,
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EPILOG_DELETE_PREVIOUS,
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EPILOG_DELETE_STOP,
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EPILOG_DELETE_BOTH,
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CHECKPOINT,
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DRIVER_CANCEL,
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SAVEAS_HOT,
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FINALIZE
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};
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/**
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* Triggers specific actions to the Information Manager. This function
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* wraps the ActionManager trigger function.
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* @param action the IM action
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* @param vid VM unique id. This is the argument of the passed to the
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* invoked action.
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*/
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virtual void trigger(
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Actions action,
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int vid);
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/**
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* This functions starts the associated listener thread, and creates a
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* new thread for the Information Manager. This thread will wait in
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* an action loop till it receives ACTION_FINALIZE.
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* @return 0 on success.
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*/
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int start();
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/**
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* Loads Virtual Machine Manager Mads defined in configuration file
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* @param uid of the user executing the driver. When uid is 0 the nebula
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* identity will be used. Otherwise the Mad will be loaded through the
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* sudo application.
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*/
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int load_mads(int uid);
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/**
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* Gets the thread identification.
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* @return pthread_t for the manager thread (that in the action loop).
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*/
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pthread_t get_thread_id() const
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{
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return tm_thread;
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};
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/**
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* Inserts a transfer command in the xfs stream
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*
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* @param vm The VM
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* @param disk Disk to transfer
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* @param disk_index Disk index
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* @param system_tm_mad The Transfer Manager for the system datastore
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* @param opennebula_hostname The front-end hostname
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* @param xfr Stream where the transfer command will be written
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* @param error Error reason, if any
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*
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* @return 0 on success
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*/
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int prolog_transfer_command(
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VirtualMachine * vm,
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const VectorAttribute * disk,
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string& system_tm_mad,
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string& opennebula_hostname,
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ostream& xfr,
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ostringstream& error);
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/**
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* Inserts a transfer command in the xfs stream
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*
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* @param vm The VM
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* @param disk Disk to transfer
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* @param disk_index Disk index
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* @param xfr Stream where the transfer command will be written
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*/
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void epilog_transfer_command(
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VirtualMachine * vm,
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const VectorAttribute * disk,
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ostream& xfr);
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/**
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* Inserts a transfer command in the xfs stream, for live migration
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*
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* @param vm The VM
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* @param xfr Stream where the transfer command will be written
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*/
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void migrate_transfer_command(
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VirtualMachine * vm,
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ostream& xfr);
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/**
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* This function generates the the epilog_delete sequence for current,
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* front-end and previous hosts.
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* @param vm pointer to VM, locked
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* @param xfr stream to write the commands
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* @param local true to delete the front-end
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* @param previous true to delete the previous host
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*
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* @return 0 on success
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*/
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int epilog_delete_commands(VirtualMachine *vm,
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ostream& xfr,
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bool local,
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bool previous);
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private:
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/**
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* Thread id for the Transfer Manager
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*/
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pthread_t tm_thread;
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/**
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* Pointer to the Virtual Machine Pool, to access VMs
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*/
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VirtualMachinePool * vmpool;
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/**
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* Pointer to the Host Pool, to access hosts
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*/
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HostPool * hpool;
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/**
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* Action engine for the Manager
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*/
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ActionManager am;
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/**
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* Generic name for the TransferManager driver
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*/
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static const char * transfer_driver_name;
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/**
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* Returns a pointer to a Transfer Manager driver.
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* @param name of an attribute of the driver (e.g. its type)
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* @param value of the attribute
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* @return the TM driver owned by uid with attribute name equal to value
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* or 0 in not found
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*/
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const TransferManagerDriver * get(
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const string& name,
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const string& value)
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{
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return static_cast<const TransferManagerDriver *>
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(MadManager::get(0,name,value));
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};
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/**
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* Returns a pointer to a Transfer Manager driver. The driver is
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* searched by its name.
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* @param name the name of the driver
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* @return the TM driver owned by uid with attribute name equal to value
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* or 0 in not found
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*/
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const TransferManagerDriver * get(
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const string& name)
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{
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string _name("NAME");
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return static_cast<const TransferManagerDriver *>
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(MadManager::get(0,_name,name));
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};
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/**
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* Returns a pointer to a Transfer Manager driver. The driver is
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* searched by its name.
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* @return the TM driver for the Transfer Manager
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*/
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const TransferManagerDriver * get()
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{
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string _name("NAME");
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return static_cast<const TransferManagerDriver *>
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(MadManager::get(0,_name,transfer_driver_name));
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};
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/**
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* Function to execute the Manager action loop method within a new pthread
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* (requires C linkage)
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*/
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friend void * tm_action_loop(void *arg);
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/**
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* The action function executed when an action is triggered.
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* @param action the name of the action
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* @param arg arguments for the action function
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*/
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void do_action(
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const string & action,
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void * arg);
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/**
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* This function starts the prolog sequence
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*/
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void prolog_action(int vid);
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/**
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* This function starts the prolog migration sequence
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*/
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void prolog_migr_action(int vid);
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/**
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* This function starts the prolog resume sequence
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*/
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void prolog_resume_action(int vid);
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/**
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* This function starts the epilog sequence
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*/
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void epilog_action(int vid);
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/**
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* This function starts the epilog_stop sequence
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*/
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void epilog_stop_action(int vid);
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/**
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* This function starts the epilog_delete sequence in the current host
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* @param vid the Virtual Machine ID
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*/
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void epilog_delete_action(int vid)
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{
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epilog_delete_action(false, vid);
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}
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/**
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* This function starts the epilog_delete_stop sequence on the local host
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* i.e. the front-end (the VM is not running)
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* @param vid the Virtual Machine ID
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*/
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void epilog_delete_stop_action(int vid)
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{
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epilog_delete_action(true, vid);
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}
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/**
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* This function starts the epilog_delete sequence on the previous host
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* @param vid the Virtual Machine ID
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*/
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void epilog_delete_previous_action(int vid);
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/**
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* This function starts the epilog_delete sequence on the current and
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* previous hosts
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* @param vid the Virtual Machine ID
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*/
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void epilog_delete_both_action(int vid);
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/**
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* This function starts the epilog_delete sequence
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*/
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void epilog_delete_action(bool local, int vid);
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/**
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* This function starts the epilog sequence
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*/
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void checkpoint_action(int vid);
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/**
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* This function cancels the operation being performed by the driver
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*/
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void driver_cancel_action(int vid);
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/**
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* This function starts the saveas of the given disk
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*/
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void saveas_hot_action(int vid);
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};
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#endif /*TRANSFER_MANAGER_H*/
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