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one/include/VirtualMachineManager.h
Ruben S. Montero 10442f8182 feature #3782: Snapshots in RUNNING state
2015-07-01 13:38:19 +02:00

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2015, OpenNebula Project (OpenNebula.org), C12G Labs */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef VIRTUAL_MACHINE_MANAGER_H_
#define VIRTUAL_MACHINE_MANAGER_H_
#include "MadManager.h"
#include "ActionManager.h"
#include "VirtualMachineManagerDriver.h"
#include "VirtualMachinePool.h"
#include "HostPool.h"
#include "NebulaTemplate.h"
using namespace std;
extern "C" void * vmm_action_loop(void *arg);
class VirtualMachineManager : public MadManager, public ActionListener
{
public:
VirtualMachineManager(
VirtualMachinePool * _vmpool,
HostPool * _hpool,
time_t _timer_period,
time_t _poll_period,
bool _do_vm_poll,
int _vm_limit,
vector<const Attribute*>& _mads);
~VirtualMachineManager(){};
enum Actions
{
DEPLOY,
SAVE,
SHUTDOWN,
CANCEL,
CANCEL_PREVIOUS,
CLEANUP,
CLEANUP_BOTH,
CLEANUP_PREVIOUS,
MIGRATE,
RESTORE,
REBOOT,
RESET,
POLL,
TIMER,
DRIVER_CANCEL,
FINALIZE,
ATTACH,
DETACH,
ATTACH_NIC,
DETACH_NIC,
SNAPSHOT_CREATE,
SNAPSHOT_REVERT,
SNAPSHOT_DELETE,
DISK_SNAPSHOT_CREATE,
DISK_SNAPSHOT_REVERT
};
/**
* Triggers specific actions to the Virtual Machine Manager. This function
* wraps the ActionManager trigger function.
* @param action the VMM action
* @param vid VM unique id. This is the argument of the passed to the
* invoked action.
*/
virtual void trigger(
Actions action,
int vid);
/**
* This functions starts the associated listener thread, and creates a
* new thread for the Virtual Machine Manager. This thread will wait in
* an action loop till it receives ACTION_FINALIZE.
* @return 0 on success.
*/
int start();
/**
* Gets the thread identification.
* @return pthread_t for the manager thread (that in the action loop).
*/
pthread_t get_thread_id() const
{
return vmm_thread;
};
/**
* Loads Virtual Machine Manager Mads defined in configuration file
* @param uid of the user executing the driver. When uid is 0 the nebula
* identity will be used. Otherwise the Mad will be loaded through the
* sudo application.
*/
int load_mads(int uid);
private:
/**
* Thread id for the Virtual Machine Manager
*/
pthread_t vmm_thread;
/**
* Pointer to the Virtual Machine Pool, to access VMs
*/
VirtualMachinePool * vmpool;
/**
* Pointer to the Host Pool, to access hosts
*/
HostPool * hpool;
/**
* Timer period for the Virtual Machine Manager.
*/
time_t timer_period;
/**
* Virtual Machine polling interval
*/
time_t poll_period;
/**
* Perform pro-active VM monitoring
*/
bool do_vm_poll;
/**
* Virtual Machine polling limit
*/
int vm_limit;
/**
* Action engine for the Manager
*/
ActionManager am;
/**
* Function to execute the Manager action loop method within a new pthread
* (requires C linkage)
*/
friend void * vmm_action_loop(void *arg);
/**
* Returns a pointer to a Virtual Machine Manager driver.
* @param uid of the owner of the driver
* @param name of an attribute of the driver (e.g. its type)
* @param value of the attribute
* @return the VM driver owned by uid with attribute name equal to value
* or 0 in not found
*/
const VirtualMachineManagerDriver * get(
const string& name,
const string& value)
{
return static_cast<const VirtualMachineManagerDriver *>
(MadManager::get(0,name,value));
};
/**
* Returns a pointer to a Virtual Machine Manager driver. The driver is
* searched by its name.
* @param name the name of the driver
* @return the VM driver owned by uid with attribute name equal to value
* or 0 in not found
*/
const VirtualMachineManagerDriver * get(
const string& name)
{
string _name("NAME");
return static_cast<const VirtualMachineManagerDriver *>
(MadManager::get(0,_name,name));
};
/**
* The action function executed when an action is triggered.
* @param action the name of the action
* @param arg arguments for the action function
*/
void do_action(
const string & action,
void * arg);
/**
* Function to format a VMM Driver message in the form:
* <VMM_DRIVER_ACTION_DATA>
* <HOST> hostname </HOST>
* <NET_DRV> net_drv </NET_DRV>
* <MIGR_HOST> m_hostname </MIGR_HOST>
* <MIGR_NET_DRV> m_net_drv </MIGR_NET_DRV>
* <DOMAIN> domain_id </DOMAIN>
* <DEPLOYMENT_FILE> dfile </DEPLOYMENT_FILE>
* <CHECKPOINT_FILE> cfile </CHECKPOINT_FILE>
* <VM>
* VM representation in XML
* </VM>
* </VMM_DRIVER_ACTION_DATA>
*
* @param hostname of the host to perform the action
* @param net_drv name of the vlan driver
* @param m_hostname name of the host to migrate the VM
* @param m_net_drv name of the vlan driver
* @param domain domain id as returned by the hypervisor
* @param dfile deployment file to boot the VM
* @param cfile checkpoint file to save the VM
* @param disk_id Disk to attach/detach, if any
* @param tm_command Transfer Manager command to attach/detach, if any
* @param tm_command_rollback TM command in case of attach failure
* @param disk_target_path Path of the disk to attach, if any
* @param tmpl the VM information in XML
*/
string * format_message(
const string& hostname,
const string& net_drv,
const string& m_hostname,
const string& m_net_drv,
const string& domain,
const string& ldfile,
const string& rdfile,
const string& cfile,
const string& tm_command,
const string& tm_command_rollback,
const string& disk_target_path,
const string& tmpl);
/**
* Function executed when a DEPLOY action is received. It deploys a VM on
* a Host.
* @param vid the id of the VM to be deployed.
*/
void deploy_action(
int vid);
/**
* Function to stop a running VM and generate a checkpoint file. This
* function is executed when a SAVE action is triggered.
* @param vid the id of the VM.
*/
void save_action(
int vid);
/**
* Shutdowns a VM when a SHUTDOWN action is received.
* @param vid the id of the VM.
*/
void shutdown_action(
int vid);
/**
* Cancels a VM when a CANCEL action is received.
* @param vid the id of the VM.
*/
void cancel_action(
int vid);
/**
* Cancels a VM (in the previous host) when a CANCEL action is received.
* Note that the domain-id is the last one returned by a boot action
* @param vid the id of the VM.
*/
void cancel_previous_action(
int vid);
/**
* Cleanups a host (cancel VM + delete disk images).
* @param vid the id of the VM.
* @param cancel_previous if true the VM will be canceled in the previous
* host (only relevant to delete VM's in MIGRATE state)
*/
void cleanup_action(
int vid, bool cancel_previous);
/**
* Cleanups the previous host (cancel VM + delete disk images).
* @param vid the id of the VM.
*/
void cleanup_previous_action(
int vid);
/**
* Function to migrate (live) a VM (MIGRATE action).
* @param vid the id of the VM.
*/
void migrate_action(
int vid);
/**
* Restores a VM from a checkpoint file.
* @param vid the id of the VM.
*/
void restore_action(
int vid);
/**
* Reboots a running VM.
* @param vid the id of the VM.
*/
void reboot_action(
int vid);
/**
* Resets a running VM.
* @param vid the id of the VM.
*/
void reset_action(
int vid);
/**
* Polls a VM.
* @param vid the id of the VM.
*/
void poll_action(
int vid);
/**
* This function is executed periodically to poll the running VMs
*/
void timer_action();
/**
* Attaches a new disk to a VM. The VM must have a disk with the
* attribute ATTACH = YES
* @param vid the id of the VM.
*/
void attach_action(
int vid);
/**
* Detaches a disk from a VM. The VM must have a disk with the
* attribute ATTACH = YES
* @param vid the id of the VM.
*/
void detach_action(
int vid);
/**
* Attaches a new NIC to a VM. The VM must have a NIC with the
* attribute ATTACH = YES
* @param vid the id of the VM.
*/
void attach_nic_action(
int vid);
/**
* Detaches a NIC from a VM. The VM must have a NIC with the
* attribute ATTACH = YES
* @param vid the id of the VM.
*/
void detach_nic_action(
int vid);
/**
* Creates a new system snapshot. The VM must have a snapshot with the
* attribute ACTIVE = YES
*
* @param vid the id of the VM.
*/
void snapshot_create_action(int vid);
/**
* Reverts to a snapshot. The VM must have a snapshot with the
* attribute ACTIVE = YES
*
* @param vid the id of the VM.
*/
void snapshot_revert_action(int vid);
/**
* Deletes a snapshot. The VM must have a snapshot with the
* attribute ACTIVE = YES
*
* @param vid the id of the VM.
*/
void snapshot_delete_action(int vid);
/**
* Creates a new disk system snapshot.
*
* @param vid the id of the VM.
*/
void disk_snapshot_create_action(int vid);
/**
* Reverts to a disk snapshot.
*
* @param vid the id of the VM.
*/
void disk_snapshot_revert_action(int vid);
/**
* This function cancels the current driver operation
*/
void driver_cancel_action(
int vid);
};
#endif /*VIRTUAL_MACHINE_MANAGER_H*/
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