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https://github.com/OpenNebula/one.git
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337 lines
11 KiB
C++
337 lines
11 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2020, OpenNebula Project, OpenNebula Systems */
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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 "ProtocolMessages.h"
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#include "DriverManager.h"
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#include "Listener.h"
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class HostPool;
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class VirtualMachine;
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class VirtualMachineDisk;
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class VirtualMachinePool;
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class LifeCycleManager;
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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class TransferManager :
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public DriverManager<Driver<transfer_msg_t>>,
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public Listener
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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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const std::string& _mad_location):
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DriverManager(_mad_location),
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Listener("Transfer Manager"),
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vmpool(_vmpool),
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hpool(_hpool)
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{
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};
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~TransferManager() = default;
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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 Transfer Manager Drivers in configuration file
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* @param _mads configuration of drivers
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*/
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int load_drivers(const std::vector<const VectorAttribute*>& _mads);
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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 VirtualMachineDisk* disk,
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std::string& system_tm_mad,
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std::string& opennebula_hostname,
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std::ostream& xfr,
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std::ostringstream& error);
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/**
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* Inserts a context command in the xfs stream
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*
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* @param vm The VM
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* @param token_password Owner user's token password
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* @param system_tm_mad The Transfer Manager for the system datastore
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* @param disk_id of the context disk
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* @param xfr Stream where the transfer command will be written
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*
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* @return -1 in case of error, 0 if the VM has no context, 1 on success
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*/
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int prolog_context_command(
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VirtualMachine * vm,
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const std::string& token_password,
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std::string& system_tm_mad,
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int& disk_id,
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std::ostream& xfr);
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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 host where the operation will be performed fe or host
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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 std::string& host,
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const VirtualMachineDisk * disk,
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std::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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std::ostream& xfr);
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/**
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* This function generates 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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std::ostream& xfr,
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bool local,
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bool previous);
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/**
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* This function generates the TM command for the given snapshot action
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* @param vm pointer to VM, locked
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* @param snap_action: "SNAP_CREATE, SNAP_DELETE, SNAP_REVERT"
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* @param xfr stream to write the commands
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*
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* @return 0 on success
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*/
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int snapshot_transfer_command(VirtualMachine * vm,
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const char * snap_action,
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std::ostream& xfr);
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/**
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* Inserts a resize command in the xfr stream
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* @param vm
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* @param disk to resize
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* @param xfr stream to include the command.
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*/
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void resize_command(
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VirtualMachine * vm,
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const VirtualMachineDisk * disk,
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std::ostream& xfr);
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private:
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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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* 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. 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 Driver<transfer_msg_t> * get(const std::string& name) const
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{
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return DriverManager::get_driver(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 Driver<transfer_msg_t> * get() const
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{
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return DriverManager::get_driver(transfer_driver_name);
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};
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// -------------------------------------------------------------------------
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// Protocol implementation, procesing messages from driver
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// -------------------------------------------------------------------------
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static void _undefined(std::unique_ptr<transfer_msg_t> msg);
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void _transfer(std::unique_ptr<transfer_msg_t> msg);
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static void _log(std::unique_ptr<transfer_msg_t> msg);
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// -------------------------------------------------------------------------
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// Action Listener interface
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// -------------------------------------------------------------------------
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static const int drivers_timeout = 10;
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void finalize_action()
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{
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DriverManager::stop(drivers_timeout);
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};
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public:
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/**
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* This function starts the prolog sequence
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*/
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void trigger_prolog(VirtualMachine * vm);
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/**
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* This function starts the prolog migration sequence
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*/
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void trigger_prolog_migr(VirtualMachine * vm);
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/**
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* This function starts the prolog resume sequence
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*/
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void trigger_prolog_resume(VirtualMachine * vm);
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/**
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* This function starts the prolog attach sequence
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*/
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void trigger_prolog_attach(VirtualMachine * vm);
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/**
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* This function starts the epilog sequence
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*/
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void trigger_epilog(bool local, VirtualMachine * vm);
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/**
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* This function starts the epilog_stop sequence
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*/
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void trigger_epilog_stop(VirtualMachine * vm);
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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 trigger_epilog_delete(VirtualMachine * vm)
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{
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trigger_epilog_delete(false, vm);
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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 trigger_epilog_delete_stop(VirtualMachine * vm)
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{
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trigger_epilog_delete(true, vm);
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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 trigger_epilog_delete_previous(VirtualMachine * vm);
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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 trigger_epilog_delete_both(VirtualMachine * vm);
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/**
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* This function starts the epilog_delete sequence
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*/
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void trigger_epilog_delete(bool local, VirtualMachine * vm);
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/**
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* This function starts the epilog detach sequence
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*/
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void trigger_epilog_detach(VirtualMachine * vm);
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/**
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* This function starts the epilog sequence
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*/
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void trigger_checkpoint(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 trigger_driver_cancel(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 trigger_saveas_hot(int vid);
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/**
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* This function performs a generic snapshot action
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*/
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void do_snapshot_action(int vid, const char * action);
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/**
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* This function takes an snapshot of a disk
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*/
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void trigger_snapshot_create(int vid);
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/**
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* This function takes an snapshot of a disk
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*/
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void trigger_snapshot_revert(int vid);
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/**
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* This function deletes an snapshot of a disk
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*/
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void trigger_snapshot_delete(int vid);
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/**
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* This function resizes a VM disk
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*/
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void trigger_resize(int vid);
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};
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#endif /*TRANSFER_MANAGER_H*/
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