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one/include/VirtualMachineManagerDriver.h
Pavel Czerný 7ba1bbe633
F #1660: Hotplug VCPU and mem for KVM (#392) 
Co-authored-by: Ruben S. Montero <rsmontero@opennebula.org>
2020-11-17 11:24:52 +01:00

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2020, 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 VIRTUAL_MACHINE_MANAGER_DRIVER_H_
#define VIRTUAL_MACHINE_MANAGER_DRIVER_H_
#include <map>
#include <string>
#include <sstream>
#include "ProtocolMessages.h"
#include "Driver.h"
#include "ActionSet.h"
#include "VMActions.h"
#include "Host.h"
#include "Cluster.h"
#include "VirtualMachine.h"
/**
* VirtualMachineManagerDriver provides a base class to implement VM Manager
* Drivers. This class implements the protocol and recover functions
* from the Mad interface. Classes derived from the VirtualMachineManagerDriver
* must implement the deployment function to generate specific VM
* deployment information for the unerlying MAD.
*/
class VirtualMachineManagerDriver : public Driver<vm_msg_t>
{
public:
VirtualMachineManagerDriver(const std::string& mad_location,
const std::map<std::string,std::string>& attrs);
virtual ~VirtualMachineManagerDriver() = default;
/**
* Generates a driver-specific deployment file:
* @param vm pointer to a virtual machine
* @param file_name to generate the deployment description
* @return 0 on success
*/
virtual int deployment_description(
const VirtualMachine * vm,
const std::string& file_name) const = 0;
/**
* Validates de VM raws section
* @param raw_section raw section of the VM.
* @param error description on error
* @return 0 on success
*/
virtual int validate_raw(const std::string& raw, std::string& error) const
{
return 0;
}
/**
* Check if action is supported for imported VMs
* @param action
* @return True if it is supported
*/
bool is_imported_action_supported(VMActions::Action action) const
{
return imported_actions.is_set(action);
}
/**
* @return true if system snapshots are preserved
*/
bool is_keep_snapshots() const
{
return keep_snapshots;
}
/**
* @return true if datastore live migration
*/
bool is_ds_live_migration() const
{
return ds_live_migration;
}
/**
* @return true if cold nic attach
*/
bool is_cold_nic_attach() const
{
return cold_nic_attach;
}
/**
* @return true if hotplug vcpu and memory supported
*/
bool is_live_resize() const
{
return live_resize;
}
protected:
/**
* Gets a configuration attr from driver configuration file (single
* version)
* @param name of config attribute
* @param value of the attribute
*/
template<typename T>
void get_default(const std::string& name, T& value) const
{
driver_conf.get(name, value);
}
/**
* Gets a configuration attr from driver configuration file (vector
* version)
* @param name of config vector attribute for the domain
* @param vname of the attribute
* @param value of the attribute
*/
template<typename T>
int get_default(const char* name, const char* vname, T& value) const
{
const VectorAttribute * vattr = driver_conf.get(name);
if (vattr == 0)
{
return -1;
}
return vattr->vector_value(vname, value);
}
/**
* Gets a configuration attribute (single version)
* priority VM > host > cluster > config_file
* @param vm pointer to Virtual Machine
* @param host pointer to Host
* @param cluster pointer Cluster
* @param name of config attribute
* @param value of the attribute
* @return true if atribute was found, false otherwise
*/
template<typename T>
bool get_attribute(const VirtualMachine * vm,
const Host * host,
const Cluster * cluster,
const std::string& name,
T& value) const
{
// Get value from VM
if (vm && vm->get_template_attribute(name, value))
{
return true;
}
// Get value from host
if (host && host->get_template_attribute(name, value))
{
return true;
}
// Get value from cluster
if (cluster && cluster->get_template_attribute(name, value))
{
return true;
}
return driver_conf.get(name, value);
}
/**
* Gets a configuration attribute (vector version)
* priority VM > host > cluster > config_file
* @param vm pointer to Virtual Machine
* @param host pointer to Host
* @param cluster pointer Cluster
* @param name of config vector attribute for the domain
* @param vname of the attribute
* @param value of the attribute
* @return true if atribute was found, false otherwise
*/
template<typename T>
bool get_attribute(const VirtualMachine * vm,
const Host * host,
const Cluster * cluster,
const std::string& name,
const std::string& vname,
T& value) const
{
const VectorAttribute * vattr;
// Get value from VM
if (vm)
{
vattr = vm->get_template_attribute(name);
if (vattr && vattr->vector_value(vname, value) == 0)
{
return true;
}
}
// Get value from host
if (host)
{
vattr = host->get_template_attribute(name);
if (vattr && vattr->vector_value(vname, value) == 0)
{
return true;
}
}
// Get value from cluster
if (cluster)
{
vattr = cluster->get_template_attribute(name);
if (vattr && vattr->vector_value(vname, value) == 0)
{
return true;
}
}
vattr = driver_conf.get(name);
if (vattr && vattr->vector_value(vname, value) == 0)
{
return true;
}
return false;
}
private:
friend class VirtualMachineManager;
static const std::string imported_actions_default;
static const std::string imported_actions_default_public;
/**
* Configuration file for the driver
*/
Template driver_conf;
/**
* List of available actions for imported VMs. Each bit is an action
* as defined in History.h, 1=supported and 0=not supported
*/
ActionSet<VMActions::Action> imported_actions;
/**
* Set to true if the hypervisor can keep system snapshots across
* create/delete cycles and live migrations.
*/
bool keep_snapshots;
/**
* Set to true if live migration between datastores is allowed.
*/
bool ds_live_migration;
/**
* Set to true if cold nic attach/detach calls (pre, post, clean scripts)
*/
bool cold_nic_attach;
/**
* Set to true if hypervisor supports hotplug vcpu and memory
*/
bool live_resize;
/**
* Sends a deploy request to the MAD: "DEPLOY ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void deploy(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::DEPLOY, oid, drv_msg);
}
/**
* Sends a shutdown request to the MAD: "SHUTDOWN ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void shutdown(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::SHUTDOWN, oid, drv_msg);
}
/**
* Sends a reset request to the MAD: "RESET ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void reset(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::RESET, oid, drv_msg);
}
/**
* Sends a reboot request to the MAD: "REBOOT ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void reboot(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::REBOOT, oid, drv_msg);
}
/**
* Sends a cancel request to the MAD: "CANCEL ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void cancel(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::CANCEL, oid, drv_msg);
}
/**
* Sends a cleanup request to the MAD: "CLEANUP ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void cleanup(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::CLEANUP, oid, drv_msg);
}
/**
* Sends a checkpoint request to the MAD: "CHECKPOINT ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void checkpoint(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::CHECKPOINT, oid, drv_msg);
}
/**
* Sends a save request to the MAD: "SAVE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void save(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::SAVE, oid, drv_msg);
}
/**
* Sends a save request to the MAD: "SAVE ID XML_DRV_MSG"
* @param oid the virtual machine id.
*/
void driver_cancel(const int oid) const
{
write_drv(VMManagerMessages::DRIVER_CANCEL, oid, "");
}
/**
* Sends a save request to the MAD: "RESTORE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void restore(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::RESTORE, oid, drv_msg);
}
/**
* Sends a migrate request to the MAD: "MIGRATE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void migrate(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::MIGRATE, oid, drv_msg);
}
/**
* Sends an attach request to the MAD: "ATTACHDISK ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void attach(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::ATTACHDISK, oid, drv_msg);
}
/**
* Sends a detach request to the MAD: "DETACHDISK ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void detach(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::DETACHDISK, oid, drv_msg);
}
/**
* Sends an attach NIC request to the MAD: "ATTACHNIC ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void attach_nic(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::ATTACHNIC, oid, drv_msg);
}
/**
* Sends a detach request to the MAD: "DETACHNIC ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void detach_nic(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::DETACHNIC, oid, drv_msg);
}
/**
* Sends a snapshot create request to the MAD:
* "SNAPSHOTCREATE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void snapshot_create(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::SNAPSHOTCREATE, oid, drv_msg);
}
/**
* Sends a snapshot revert request to the MAD:
* "SNAPSHOTREVERT ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void snapshot_revert(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::SNAPSHOTREVERT, oid, drv_msg);
}
/**
* Sends a snapshot delete request to the MAD:
* "SNAPSHOTDELETE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void snapshot_delete(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::SNAPSHOTDELETE, oid, drv_msg);
}
/**
* Sends a disk snapshot create request to the MAD:
* "DISKSNAPSHOTCREATE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void disk_snapshot_create(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::DISKSNAPSHOTCREATE, oid, drv_msg);
}
/**
* Sends a disk resize request to the MAD:
* "RESIZE ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void disk_resize(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::RESIZEDISK, oid, drv_msg);
}
/**
* Sends an updateconf request to the MAD: "UPDATECONF ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void update_conf(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::UPDATECONF, oid, drv_msg);
}
/**
* Sends a request to update the VM security groups:
* "UPDATESG ID XML_DRV_MSG"
* @param oid the virtual machine id.
* @param drv_msg xml data for the mad operation
*/
void updatesg(
const int oid,
const std::string& drv_msg) const
{
write_drv(VMManagerMessages::UPDATESG, oid, drv_msg);
}
/**
*
*/
void write_drv(VMManagerMessages type,
const int oid,
const std::string& msg) const
{
vm_msg_t drv_msg(type, "", oid, msg);
write(drv_msg);
}
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#endif /*VIRTUAL_MACHINE_MANAGER_DRIVER_H_*/
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