/* -------------------------------------------------------------------------- */ /* Copyright 2002-2011, OpenNebula Project Leads (OpenNebula.org) */ /* */ /* 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, int _vm_limit, vector& _mads); ~VirtualMachineManager(){}; enum Actions { DEPLOY, SAVE, SHUTDOWN, CANCEL, CANCEL_PREVIOUS, MIGRATE, RESTORE, POLL, TIMER, DRIVER_CANCEL, FINALIZE }; /** * 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. */ void 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; /** * 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 (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 (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: * * hostname * net_drv * m_hostname * m_net_drv * domain_id * dfile * cfile * * VM representation in XML * * * * @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 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& dfile, const string& cfile, 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); /** * 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); /** * 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(); /** * This function cancels the current driver operation */ void driver_cancel_action( int vid); }; #endif /*VIRTUAL_MACHINE_MANAGER_H*/