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one/include/DispatchManager.h
Ruben S. Montero c1c3d0479d F #4393: More work on resize
2016-12-15 21:12:33 +01:00

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2016, OpenNebula Project, OpenNebula Systems */
/* */
/* 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 DISPATCH_MANAGER_H_
#define DISPATCH_MANAGER_H_
#include "ActionManager.h"
#include "HostPool.h"
#include "VirtualMachinePool.h"
#include "VirtualRouterPool.h"
using namespace std;
extern "C" void * dm_action_loop(void *arg);
//Forward definitions
class TransferManager;
class LifeCycleManager;
class VirtualMachineManager;
class ImageManager;
class DispatchManager : public ActionListener
{
public:
DispatchManager():
hpool(0), vmpool(0), vrouterpool(0), tm(0), vmm(0), lcm(0), imagem(0)
{
am.addListener(this);
};
~DispatchManager(){};
/**
* Initializes internal pointers to other managers. Must be called when
* all the other managers exist in Nebula::instance
*/
void init_managers();
enum Actions
{
SUSPEND_SUCCESS,/**< Send by LCM when a VM is suspended*/
STOP_SUCCESS, /**< Send by LCM when a VM is stopped*/
UNDEPLOY_SUCCESS, /**< Send by LCM when a VM is undeployed and saved*/
POWEROFF_SUCCESS, /**< Send by LCM when a VM is powered off */
DONE, /**< Send by LCM when a VM is shut down*/
RESUBMIT, /**< Send by LCM when a VM is ready for resubmission*/
FINALIZE
};
/**
* Triggers specific actions to the Dispatch Manager. This function
* wraps the ActionManager trigger function.
* @param action the DM action
* @param vid VM unique id. This is the argument of the passed to the
* invoked action.
*/
void trigger(
Actions action,
int _vid);
/**
* This functions creates a new thread for the Dispatch 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 dm_thread;
};
//--------------------------------------------------------------------------
// DM Actions, the RM and the Scheduler will invoke this methods
//--------------------------------------------------------------------------
/**
* Deploys a VM. A new history record MUST be added before calling this
* function. Also the VM MUST have its mutex locked. If the function fails
* the calling funtion is responsible for recovering from the error.
* @param vm pointer to a VirtualMachine with its mutex locked.
* @return 0 on success
*/
int deploy (
VirtualMachine * vm);
/**
* Sets an imported VM to RUNNING state, a history record MUST be added,
* and the VM MUST be locked.
* @param vm pointer to a VirtualMachine with its mutex locked.
* @return 0 on success
*/
int import (
VirtualMachine * vm);
/**
* Migrates a VM. The following actions must be performed before calling
* this function:
* - Lock the VM mutex.
* - Update the History statistics of the current host.
* - Add a new History record with the new host.
* If the function fails the calling funtion is responsible for recovering
* from the error.
* @param vm pointer to a VirtualMachine with its mutex locked.
* @return 0 on success
*/
int migrate(
VirtualMachine * vm);
/**
* Migrates a VM. The following actions must be performed before calling
* this function:
* - Lock the VM mutex.
* - Update the History statistics of the current host.
* - Add a new History record with the new host.
* If the function fails the calling funtion is responsible for recovering
* from the error.
* @param vm pointer to a VirtualMachine with its mutex locked.
* @return 0 on success
*/
int live_migrate(
VirtualMachine * vm);
/**
* Terminates a VM.
* @param vid VirtualMachine identification
* @param hard True to force the shutdown (cancel instead of shutdown)
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int terminate (
int vid,
bool hard,
string& error_str);
/**
* Shuts down a VM, but it is saved in the system DS instead of destroyed.
* @param vid VirtualMachine identification
* @param hard True to force the shutdown (cancel instead of shutdown)
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int undeploy (
int vid,
bool hard,
string& error_str);
/**
* Powers off a VM.
* @param vid VirtualMachine identification
* @param hard True to force the poweroff (cancel instead of shutdown)
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int poweroff (
int vid,
bool hard,
string& error_str);
/**
* Holds a VM.
* @param vid VirtualMachine identification
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int hold(
int vid,
string& error_str);
/**
* Releases a VM.
* @param vid VirtualMachine identification
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int release(
int vid,
string& error_str);
/**
* Stops a VM.
* @param vid VirtualMachine identification
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int stop(
int vid,
string& error_str);
/**
* Suspends a VM.
* @param vid VirtualMachine identification
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int suspend(
int vid,
string& error_str);
/**
* Resumes a VM.
* @param vid VirtualMachine identification
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int resume(
int vid,
string& error_str);
/**
* Ends a VM life cycle inside ONE.
* @param vm VirtualMachine object
* @return 0 on success, the VM mutex is unlocked
*/
int delete_vm(VirtualMachine * vm, string& error_str);
/**
* VM ID interface
*/
int delete_vm(int vid, string& error_str)
{
VirtualMachine * vm;
vm = vmpool->get(vid, true);
if ( vm == 0 )
{
error_str = "Virtual machine does not exist";
return -1;
}
return delete_vm(vm, error_str);
}
/**
* Moves a VM to PENDING state preserving any resource (i.e. leases) and id
* @param vm VirtualMachine object
* @return 0 on success
*/
int delete_recreate(VirtualMachine * vm, string& error_str);
/**
* Recover the last operation on the VM
* @param vm VirtualMachine object
* @param success if the operation is assumed to succeed or not
* @return 0 on success
*/
int recover(VirtualMachine * vm, bool success, string& error_str);
/**
* Retry the last operation on the VM
* @param vm VirtualMachine object
* @return 0 on success
*/
int retry(VirtualMachine * vm, string& error_str);
/**
* Reboots a VM preserving any resource and RUNNING state
* @param vid VirtualMachine identification
* @param hard True to force the shutdown (cancel instead of shutdown)
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int reboot(
int vid,
bool hard,
string& error_str);
/**
* Set the re-scheduling flag for the VM (must be in RUNNING state)
* @param vid VirtualMachine identification
* @param do_resched set or unset the flag
*
* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
* in a wrong a state
*/
int resched(
int vid,
bool do_resched,
string& error_str);
/**
* Starts the attach disk action.
* @param vid VirtualMachine identification
* @param tmpl Template containing the new DISK attribute.
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int attach(
int vid,
VirtualMachineTemplate * tmpl,
string& error_str);
/**
* Starts the detach disk action.
* @param vid VirtualMachine identification
* @param disk_id Disk to detach
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int detach(
int id,
int disk_id,
string& error_str);
/**
* Starts the attach NIC action.
* @param vid VirtualMachine identification
* @param tmpl Template containing the new NIC attribute.
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int attach_nic(
int vid,
VirtualMachineTemplate * tmpl,
string& error_str);
/**
* Starts the detach NIC action.
* @param vid VirtualMachine identification
* @param nic_id NIC to detach
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int detach_nic(
int id,
int nic_id,
string& error_str);
/**
* Starts the snapshot create action
*
* @param vid VirtualMachine identification
* @param name Name for the new snapshot
* @param snap_id Will contain the new snapshot ID
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int snapshot_create(
int vid,
string& name,
int& snap_id,
string& error_str);
/**
* Starts the snapshot revert action
*
* @param vid VirtualMachine identification
* @param snap_id Snapshot to be restored
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int snapshot_revert(
int vid,
int snap_id,
string& error_str);
/**
* Starts the snapshot delete action
*
* @param vid VirtualMachine identification
* @param snap_id Snapshot to be deleted
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int snapshot_delete(
int vid,
int snap_id,
string& error_str);
/**
* Starts the disk snapshot create action
*
* @param vid VirtualMachine identification
* @param did DISK identification
* @param name Description for the new snapshot
* @param snap_id Will contain the new snapshot ID
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int disk_snapshot_create(
int vid,
int did,
const string& name,
int& snap_id,
string& error_str);
/**
* Reverts the disk state to a previous snapshot
*
* @param vid VirtualMachine identification
* @param did DISK identification
* @param snap_id Snapshot to be restored
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int disk_snapshot_revert(
int vid,
int did,
int snap_id,
string& error_str);
/**
* Deletes a disk snapshot
*
* @param vid VirtualMachine identification
* @param did DISK identification
* @param snap_id Snapshot to be restored
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int disk_snapshot_delete(
int vid,
int did,
int snap_id,
string& error_str);
/**
* Starts the disk resize create action
*
* @param vid VirtualMachine identification
* @param did DISK identification
* @param size new size for the disk
* @param error_str Error reason, if any
*
* @return 0 on success, -1 otherwise
*/
int disk_resize(
int vid,
int did,
long long new_size,
string& error_str);
private:
/**
* Thread id for the Dispatch Manager
*/
pthread_t dm_thread;
/**
* Pointer to the Host Pool, to access hosts
*/
HostPool * hpool;
/**
* Pointer to the Virtual Machine Pool, to access hosts
*/
VirtualMachinePool * vmpool;
/**
* Pointer to the Virtual Machine Pool, to access hosts
*/
VirtualRouterPool * vrouterpool;
/**
* Pointer to TransferManager
*/
TransferManager * tm;
/**
* Pointer to VirtualMachineManager
*/
VirtualMachineManager * vmm;
/**
* Pointer to LifeCycleManager
*/
LifeCycleManager * lcm;
/**
* Pointer to ImageManager
*/
ImageManager * imagem;
/**
* Action engine for the Manager
*/
ActionManager am;
/**
* Function to execute the Manager action loop method within a new pthread
* (requires C linkage)
*/
friend void * dm_action_loop(void *arg);
/**
* 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);
/**
* Frees the resources associated to a VM: disks, ip addresses and Quotas
*/
void free_vm_resources(VirtualMachine * vm);
//--------------------------------------------------------------------------
// DM Actions associated with a VM state transition
//--------------------------------------------------------------------------
void suspend_success_action(int vid);
void stop_success_action(int vid);
void undeploy_success_action(int vid);
void poweroff_success_action(int vid);
void done_action(int vid);
void resubmit_action(int vid);
};
#endif /*DISPATCH_MANAGER_H*/
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