/* -------------------------------------------------------------------------- */ /* Copyright 2002-2012, 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_H_ #define VIRTUAL_MACHINE_H_ #include "VirtualMachineTemplate.h" #include "PoolSQL.h" #include "History.h" #include "Log.h" #include "NebulaLog.h" #include #include using namespace std; class AuthRequest; /* -------------------------------------------------------------------------- */ /* -------------------------------------------------------------------------- */ /** * The Virtual Machine class. It represents a VM... */ class VirtualMachine : public PoolObjectSQL { public: // ------------------------------------------------------------------------- // VM States // ------------------------------------------------------------------------- /** * Global Virtual Machine state */ enum VmState { INIT = 0, PENDING = 1, HOLD = 2, ACTIVE = 3, STOPPED = 4, SUSPENDED = 5, DONE = 6, FAILED = 7 }; /** * Virtual Machine state associated to the Life-cycle Manager */ enum LcmState { LCM_INIT = 0, PROLOG = 1, BOOT = 2, RUNNING = 3, MIGRATE = 4, SAVE_STOP = 5, SAVE_SUSPEND = 6, SAVE_MIGRATE = 7, PROLOG_MIGRATE = 8, PROLOG_RESUME = 9, EPILOG_STOP = 10, EPILOG = 11, SHUTDOWN = 12, CANCEL = 13, FAILURE = 14, CLEANUP = 15, UNKNOWN = 16 }; // ------------------------------------------------------------------------- // Log & Print // ------------------------------------------------------------------------- /** * writes a log message in vm.log. The class lock should be locked and * the VM MUST BE obtained through the VirtualMachinePool get() method. */ void log( const char * module, const Log::MessageType type, const ostringstream& message) const { if (_log != 0) { _log->log(module,type,message.str().c_str()); } }; /** * writes a log message in vm.log. The class lock should be locked and * the VM MUST BE obtained through the VirtualMachinePool get() method. */ void log( const char * module, const Log::MessageType type, const char * message) const { if (_log != 0) { _log->log(module,type,message); } }; /** * Function to print the VirtualMachine object into a string in * XML format * @param xml the resulting XML string * @return a reference to the generated string */ string& to_xml(string& xml) const; /** * Function to print the VirtualMachine object into a string in * XML format, with extended information (full history records) * @param xml the resulting XML string * @return a reference to the generated string */ string& to_xml_extended(string& xml) const; /** * Rebuilds the object from an xml formatted string * @param xml_str The xml-formatted string * * @return 0 on success, -1 otherwise */ int from_xml(const string &xml_str); // ------------------------------------------------------------------------ // Dynamic Info // ------------------------------------------------------------------------ /** * Updates VM dynamic information (id). * @param _deploy_id the VMM driver specific id */ void update_info( const string& _deploy_id) { deploy_id = _deploy_id; }; /** * Updates VM dynamic information (usage counters). * @param _memory used by the VM (total) * @param _cpu used by the VM (rate) * @param _net_tx transmitted bytes (total) * @param _net_tx received bytes (total) */ void update_info( const int _memory, const int _cpu, const int _net_tx, const int _net_rx) { if (_memory != -1) { memory = _memory; } if (_cpu != -1) { cpu = _cpu; } if (_net_tx != -1) { net_tx = _net_tx; } if (_net_rx != -1) { net_rx = _net_rx; } }; /** * Returns the deployment ID * @return the VMM driver specific ID */ const string& get_deploy_id() const { return deploy_id; }; /** * Sets the VM exit time * @param _et VM exit time (when it arrived DONE/FAILED states) */ void set_exit_time(time_t et) { etime = et; }; // ------------------------------------------------------------------------ // Access to VM locations // ------------------------------------------------------------------------ /** * Returns the remote VM directory. The VM remote dir is in the form: * $DATASTORE_LOCATION/$SYSTEM_DS_ID/$VM_ID. The remote system_dir stores * disks for a running VM in the target host. * @return the remote system directory for the VM */ string get_remote_system_dir() const; /** * Returns the local VM directory. The VM local dir is in the form: * $SYSTEM_DS_BASE_PATH/$VM_ID. Temporary stores VM disks. * @return the system directory for the VM */ string get_system_dir() const; // ------------------------------------------------------------------------ // History // ------------------------------------------------------------------------ /** * Adds a new history record an writes it in the database. */ void add_history( int hid, const string& hostname, const string& vmm_mad, const string& vnm_mad); /** * Duplicates the last history record. Only the host related fields are * affected (i.e. no counter is copied nor initialized). * @param reason explaining the new addition. */ void cp_history(); /** * Duplicates the previous history record. Only the host related fields are * affected (i.e. no counter is copied nor initialized). * @param reason explaining the new addition. */ void cp_previous_history(); /** * Checks if the VM has a valid history record. This function * MUST be called before using any history related function. * @return true if the VM has a record */ bool hasHistory() const { return (history!=0); }; /** * Checks if the VM has a valid previous history record. This function * MUST be called before using any previous_history related function. * @return true if the VM has a previous record */ bool hasPreviousHistory() const { return (previous_history!=0); }; /** * Returns the VMM driver name for the current host. The hasHistory() * function MUST be called before this one. * @return the VMM mad name */ const string & get_vmm_mad() const { return history->vmm_mad_name; }; /** * Returns the VMM driver name for the previous host. The hasPreviousHistory() * function MUST be called before this one. * @return the VMM mad name */ const string & get_previous_vmm_mad() const { return previous_history->vmm_mad_name; }; /** * Returns the VNM driver name for the current host. The hasHistory() * function MUST be called before this one. * @return the VNM mad name */ const string & get_vnm_mad() const { return history->vnm_mad_name; }; /** * Returns the VNM driver name for the previous host. The hasPreviousHistory() * function MUST be called before this one. * @return the VNM mad name */ const string & get_previous_vnm_mad() const { return previous_history->vnm_mad_name; }; /** * Returns the transfer filename. The transfer file is in the form: * $ONE_LOCATION/var/$VM_ID/transfer.$SEQ * or, in case that OpenNebula is installed in root * /var/lib/one/$VM_ID/transfer.$SEQ * The hasHistory() function MUST be called before this one. * @return the transfer filename */ const string & get_transfer_file() const { return history->transfer_file; }; /** * Returns the deployment filename. The deployment file is in the form: * $ONE_LOCATION/var/$VM_ID/deployment.$SEQ * or, in case that OpenNebula is installed in root * /var/lib/one/$VM_ID/deployment.$SEQ * The hasHistory() function MUST be called before this one. * @return the deployment filename */ const string & get_deployment_file() const { return history->deployment_file; }; /** * Returns the context filename. The context file is in the form: * $ONE_LOCATION/var/$VM_ID/context.sh * or, in case that OpenNebula is installed in root * /var/lib/one/$VM_ID/context.sh * The hasHistory() function MUST be called before this one. * @return the deployment filename */ const string & get_context_file() const { return history->context_file; } /** * Returns the remote deployment filename. The file is in the form: * $VM_DIR/$VM_ID/images/deployment.$SEQ * The hasHistory() function MUST be called before this one. * @return the deployment filename */ const string & get_remote_deployment_file() const { return history->rdeployment_file; }; /** * Returns the checkpoint filename for the current host. The checkpoint file * is in the form: * $VM_DIR/$VM_ID/images/checkpoint * The hasHistory() function MUST be called before this one. * @return the checkpoint filename */ const string & get_checkpoint_file() const { return history->checkpoint_file; }; /** * Returns the hostname for the current host. The hasHistory() * function MUST be called before this one. * @return the hostname */ const string & get_hostname() const { return history->hostname; }; /** * Returns the hostname for the previous host. The hasPreviousHistory() * function MUST be called before this one. * @return the hostname */ const string & get_previous_hostname() const { return previous_history->hostname; }; /** * Returns the reason that originated the VM migration in the previous host * @return the migration reason to leave this host */ const History::MigrationReason get_previous_reason() const { return previous_history->reason; }; /** * Get host id where the VM is or is going to execute. The hasHistory() * function MUST be called before this one. */ int get_hid() { return history->hid; } /** * Get host id where the VM was executing. The hasPreviousHistory() * function MUST be called before this one. */ int get_previous_hid() { return previous_history->hid; } /** * Sets start time of a VM. * @param _stime time when the VM started */ void set_stime(time_t _stime) { history->stime=_stime; }; /** * Sets end time of a VM. * @param _etime time when the VM finished */ void set_etime(time_t _etime) { string xml; history->vm_info = obj_template->to_xml(xml); history->etime=_etime; }; /** * Sets end time of a VM in the previous Host. * @param _etime time when the VM finished */ void set_previous_etime(time_t _etime) { string xml; previous_history->vm_info = obj_template->to_xml(xml); previous_history->etime=_etime; }; /** * Sets start time of VM prolog. * @param _stime time when the prolog started */ void set_prolog_stime(time_t _stime) { history->prolog_stime=_stime; }; /** * Sets end time of VM prolog. * @param _etime time when the prolog finished */ void set_prolog_etime(time_t _etime) { history->prolog_etime=_etime; }; /** * Sets start time of VM running state. * @param _stime time when the running state started */ void set_running_stime(time_t _stime) { history->running_stime=_stime; }; /** * Sets end time of VM running state. * @param _etime time when the running state finished */ void set_running_etime(time_t _etime) { history->running_etime=_etime; }; /** * Sets end time of VM running state in the previous host. * @param _etime time when the running state finished */ void set_previous_running_etime(time_t _etime) { previous_history->running_etime=_etime; }; /** * Sets start time of VM epilog. * @param _stime time when the epilog started */ void set_epilog_stime(time_t _stime) { history->epilog_stime=_stime; }; /** * Sets end time of VM epilog. * @param _etime time when the epilog finished */ void set_epilog_etime(time_t _etime) { history->epilog_etime=_etime; }; /** * Sets the reason that originated the VM migration * @param _reason migration reason to leave this host */ void set_reason(History::MigrationReason _reason) { history->reason=_reason; }; /** * Sets the reason that originated the VM migration in the previous host * @param _reason migration reason to leave this host */ void set_previous_reason(History::MigrationReason _reason) { previous_history->reason=_reason; }; // ------------------------------------------------------------------------ // Template // ------------------------------------------------------------------------ /** * Parse a string and substitute variables (e.g. $NAME) using the VM * template values: * @param attribute, the string to be parsed * @param parsed, the resulting parsed string * @return 0 on success. */ int parse_template_attribute(const string& attribute, string& parsed); /** * Factory method for virtual machine templates */ Template * get_new_template() const { return new VirtualMachineTemplate; } // ------------------------------------------------------------------------ // States // ------------------------------------------------------------------------ /** * Returns the VM state (Dispatch Manager) * @return the VM state */ VmState get_state() const { return state; }; /** * Returns the VM state (life-cycle Manager) * @return the VM state */ LcmState get_lcm_state() const { return lcm_state; }; /** * Sets VM state * @param s state */ void set_state(VmState s) { state = s; }; /** * Sets VM LCM state * @param s state */ void set_state(LcmState s) { lcm_state = s; }; /** * Sets the re-scheduling flag * @param set or unset the re-schedule flag */ void set_resched(bool do_sched) { if ( do_sched == true ) { resched = 1; } else { resched = 0; } }; // ------------------------------------------------------------------------ // Timers // ------------------------------------------------------------------------ /** * Gets time from last information polling. * @return time of last poll (epoch) or 0 if never polled */ time_t get_last_poll() const { return last_poll; }; /** * Sets time of last information polling. * @param poll time in epoch, normally time(0) */ void set_last_poll(time_t poll) { last_poll = poll; }; /** * Get the VM physical requirements for the host. * @param cpu * @param memory * @param disk */ void get_requirements (int& cpu, int& memory, int& disk); // ------------------------------------------------------------------------ // Network Leases & Disk Images // ------------------------------------------------------------------------ /** * Get all network leases for this Virtual Machine * @return 0 if success */ int get_network_leases(string &error_str); /** * Releases all network leases taken by this Virtual Machine */ void release_network_leases(); /** * Get all disk images for this Virtual Machine * @param error_str Returns the error reason, if any * @return 0 if success */ int get_disk_images(string &error_str); /** * Releases all disk images taken by this Virtual Machine */ void release_disk_images(); // ------------------------------------------------------------------------ // Context related functions // ------------------------------------------------------------------------ /** * Writes the context file for this VM, and gets the paths to be included * in the context block device (CBD) * @param files space separated list of paths to be included in the CBD * @return 0 if success */ int generate_context(string &files); // ------------------------------------------------------------------------ // Datastore related functions // ------------------------------------------------------------------------ /** * Set the SAVE_AS attribute for the "disk_id"th disk. * @param disk_id Index of the disk to save * @param source to save the disk (SAVE_AS_SOURCE) * @param img_id ID of the image this disk will be saved to (SAVE_AS). * @return 0 if success */ int save_disk(const string& disk_id, const string& source, int img_id); /** * Get the original image id of the disk. It also checks that the disk can * be saved_as. * @param disk_id Index of the disk to save * @param error_str describes the error * @return -1 if failure */ int get_image_from_disk(int disk_id, string& error_str); // ------------------------------------------------------------------------ // Authorization related functions // ------------------------------------------------------------------------ /** * Sets an authorization request for a VirtualMachine template based on * the images and networks used * @param uid for template owner * @param ar the AuthRequest object * @param tmpl the virtual machine template */ static void set_auth_request(int uid, AuthRequest& ar, VirtualMachineTemplate *tmpl); // ------------------------------------------------------------------------ // DataBase implementation (Public) // ------------------------------------------------------------------------ static const char * table; private: // ------------------------------------------------------------------------- // Friends // ------------------------------------------------------------------------- friend class VirtualMachinePool; // ************************************************************************* // Virtual Machine Attributes // ************************************************************************* // ------------------------------------------------------------------------- // VM Scheduling & Managing Information // ------------------------------------------------------------------------- /** * Last time (in epoch) that the VM was polled to get its status */ time_t last_poll; // ------------------------------------------------------------------------- // Virtual Machine Description // ------------------------------------------------------------------------- /** * The state of the virtual machine. */ VmState state; /** * The state of the virtual machine (in the Life-cycle Manager). */ LcmState lcm_state; /** * Marks the VM as to be re-scheduled */ int resched; /** * Start time, the VM enter the nebula system (in epoch) */ time_t stime; /** * Exit time, the VM leave the nebula system (in epoch) */ time_t etime; /** * Deployment specific identification string, as returned by the VM driver */ string deploy_id; /** * Memory in Megabytes used by the VM */ int memory; /** * CPU usage (percent) */ int cpu; /** * Network usage, transmitted Kilobytes */ int net_tx; /** * Network usage, received Kilobytes */ int net_rx; /** * History record, for the current host */ History * history; /** * History record, for the previous host */ History * previous_history; /** * Complete set of history records for the VM */ vector history_records; // ------------------------------------------------------------------------- // Logging & Dirs // ------------------------------------------------------------------------- /** * Log class for the virtual machine, it writes log messages in * $ONE_LOCATION/var/$VID/vm.log * or, in case that OpenNebula is installed in root * /var/log/one/$VM_ID.log */ FileLog * _log; // ************************************************************************* // DataBase implementation (Private) // ************************************************************************* /** * Bootstraps the database table(s) associated to the VirtualMachine * @return 0 on success */ static int bootstrap(SqlDB * db) { int rc; ostringstream oss_vm(VirtualMachine::db_bootstrap); ostringstream oss_hist(History::db_bootstrap); rc = db->exec(oss_vm); rc += db->exec(oss_hist); return rc; }; /** * Callback function to unmarshall a VirtualMachine object * (VirtualMachine::select) * @param num the number of columns read from the DB * @param names the column names * @param vaues the column values * @return 0 on success */ int select_cb(void *nil, int num, char **names, char ** values); /** * Execute an INSERT or REPLACE Sql query. * @param db The SQL DB * @param replace Execute an INSERT or a REPLACE * @param error_str Returns the error reason, if any * @return 0 one success */ int insert_replace(SqlDB *db, bool replace, string& error_str); /** * Updates the VM history record * @param db pointer to the db * @return 0 on success */ int update_history(SqlDB * db) { if ( history != 0 ) { return history->update(db); } else return -1; }; /** * Updates the previous history record * @param db pointer to the db * @return 0 on success */ int update_previous_history(SqlDB * db) { if ( previous_history != 0 ) { return previous_history->update(db); } else return -1; }; // ------------------------------------------------------------------------- // Attribute Parser // ------------------------------------------------------------------------- /** * Mutex to perform just one attribute parse at a time */ static pthread_mutex_t lex_mutex; /** * Parse the "CONTEXT" attribute of the template by substituting * $VARIABLE, $VARIABLE[ATTR] and $VARIABLE[ATTR, ATTR = VALUE] * @param error_str Returns the error reason, if any * @return 0 on success */ int parse_context(string& error_str); /** * Parse the "REQUIREMENTS" attribute of the template by substituting * $VARIABLE, $VARIABLE[ATTR] and $VARIABLE[ATTR, ATTR = VALUE] * @param error_str Returns the error reason, if any * @return 0 on success */ int parse_requirements(string& error_str); /** * Adds automatic placement requirements: Datastore and Cluster * * @param error_str Returns the error reason, if any * @return 0 on success */ int automatic_requirements(string& error_str); /** * Parse the "GRAPHICS" attribute and generates a default PORT if not * defined */ void parse_graphics(); /** * Function that renders the VM in XML format optinally including * extended information (all history records) * @param xml the resulting XML string * @param extended include additional info if true * @return a reference to the generated string */ string& to_xml_extended(string& xml, bool extended) const; protected: //************************************************************************** // Constructor //************************************************************************** VirtualMachine(int id, int uid, int gid, const string& uname, const string& gname, VirtualMachineTemplate * _vm_template); virtual ~VirtualMachine(); // ************************************************************************* // DataBase implementation // ************************************************************************* static const char * db_names; static const char * db_bootstrap; /** * Reads the Virtual Machine (identified with its OID) from the database. * @param db pointer to the db * @return 0 on success */ int select(SqlDB * db); /** * Writes the Virtual Machine and its associated template in the database. * @param db pointer to the db * @return 0 on success */ int insert(SqlDB * db, string& error_str); /** * Writes/updates the Virtual Machine data fields in the database. * @param db pointer to the db * @return 0 on success */ int update(SqlDB * db) { string error_str; return insert_replace(db, true, error_str); } /** * Deletes a VM from the database and all its associated information * @param db pointer to the db * @return -1 */ int drop(SqlDB * db) { NebulaLog::log("ONE",Log::ERROR, "VM Drop not implemented!"); return -1; } }; #endif /*VIRTUAL_MACHINE_H_*/