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369 lines
10 KiB
C++
369 lines
10 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2020, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------*/
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#ifndef CLUSTER_H_
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#define CLUSTER_H_
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#include "PoolObjectSQL.h"
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#include "ObjectCollection.h"
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#include "DatastorePool.h"
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#include "ClusterTemplate.h"
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#include "BitMap.h"
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using namespace std;
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/**
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* The Cluster class.
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*/
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class Cluster : public PoolObjectSQL
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{
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public:
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// *************************************************************************
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// Object Collections (Public)
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// *************************************************************************
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/**
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* Returns a copy of the datastore IDs set
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*/
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set<int> get_datastores()
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{
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return datastores.clone();
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};
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/**
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* Returns a system DS for the cluster when none is set at the API level
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* @return the ID of the System
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*/
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static int get_default_system_ds(const set<int>& ds_collection);
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/**
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* Returns a copy of the host IDs set
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*/
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set<int> get_host_ids()
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{
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return hosts.clone();
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}
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/**
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* Returns a copy of the datastore IDs set
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*/
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set<int> get_datastore_ids()
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{
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return datastores.clone();
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}
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/**
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* Returns a copy of the vnet IDs set
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*/
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set<int> get_vnet_ids()
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{
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return vnets.clone();
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}
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/**
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* Get the default reserved capacity for hosts in the cluster. It can be
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* overridden if defined in the host template.
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* @param cpu reserved cpu (percentage, or absolute)
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* @param mem reserved mem (in KB)
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*/
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void get_reserved_capacity(string& cpu, string& mem) const
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{
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get_template_attribute("RESERVED_CPU", cpu);
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get_template_attribute("RESERVED_MEM", mem);
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}
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// *************************************************************************
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// DataBase implementation (Public)
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// *************************************************************************
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/**
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* Function to print the Cluster object into a string in XML format
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* @param xml the resulting XML string
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* @return a reference to the generated string
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*/
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string& to_xml(string& xml) const override;
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/**
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* Rebuilds the object from an xml formatted string
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* @param xml_str The xml-formatted string
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*
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* @return 0 on success, -1 otherwise
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*/
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int from_xml(const string &xml_str) override;
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class ClusterPool;
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// *************************************************************************
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// VNC Port management function
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// *************************************************************************
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/**
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* Returns a free VNC port, it will try first to allocate base_port + vmid.
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* If this port is not free the first lower port from the VNC_PORT/START
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* port is returned.
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* @param vmid of the VM
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* @param port reserved
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* @return 0 on success
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*/
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int get_vnc_port(int vmid, unsigned int& port)
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{
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unsigned int base_port = vnc_bitmap.get_start_bit();
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unsigned int hint_port = base_port + (vmid % (65535 - base_port));
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return vnc_bitmap.get(hint_port,port);
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}
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void release_vnc_port(int port)
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{
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vnc_bitmap.reset(port);
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}
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int set_vnc_port(int port)
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{
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return vnc_bitmap.set(port);
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}
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// *************************************************************************
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// Constructor
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// *************************************************************************
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Cluster(int id, const string& name, ClusterTemplate* cl_template,
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const VectorAttribute& vnc_conf);
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virtual ~Cluster() = default;
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// *************************************************************************
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// Attributes (Private)
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// *************************************************************************
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ObjectCollection hosts;
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ObjectCollection datastores;
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ObjectCollection vnets;
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BitMap<65536> vnc_bitmap;
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// *************************************************************************
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// DataBase implementation (Private)
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// *************************************************************************
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static const char * db_names;
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static const char * db_bootstrap;
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static const char * table;
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static const char * datastore_table;
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static const char * datastore_db_names;
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static const char * datastore_db_bootstrap;
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static const char * network_table;
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static const char * network_db_names;
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static const char * network_db_bootstrap;
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static const char * bitmap_table;
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/**
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* Execute an INSERT or REPLACE Sql query.
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* @param db The SQL DB
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* @param replace Execute an INSERT or a REPLACE
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* @param error_str Returns the error reason, if any
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* @return 0 one success
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*/
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int insert_replace(SqlDB *db, bool replace, string& error_str);
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/**
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* Bootstraps the database table(s) associated to the Cluster
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* @return 0 on success
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*/
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static int bootstrap(SqlDB * db)
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{
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int rc;
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ostringstream oss;
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oss.str(Cluster::db_bootstrap);
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rc = db->exec_local_wr(oss);
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oss.str(Cluster::datastore_db_bootstrap);
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rc += db->exec_local_wr(oss);
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oss.str(Cluster::network_db_bootstrap);
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rc += db->exec_local_wr(oss);
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return rc;
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};
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/**
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* Writes the Cluster in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int insert(SqlDB *db, string& error_str) override
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{
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int rc;
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rc = insert_replace(db, false, error_str);
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if ( rc != 0 )
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{
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return rc;
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}
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return vnc_bitmap.insert(oid, db);
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}
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/**
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* Writes/updates the Cluster's data fields in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int update(SqlDB *db) override
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{
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string error_str;
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return insert_replace(db, true, error_str);
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}
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/**
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* Writes/updates the vnc_bitmap data in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int update_vnc_bitmap(SqlDB *db)
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{
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return vnc_bitmap.update(db);
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}
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/**
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* Reads the PoolObjectSQL (identified by its OID) from the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int select(SqlDB *db) override
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{
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int rc = PoolObjectSQL::select(db);
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if ( rc != 0 )
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{
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return rc;
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}
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return vnc_bitmap.select(oid, db);
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}
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/**
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* Reads the PoolObjectSQL (identified by its OID) from the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int select(SqlDB *db, const string& _name, int _uid) override
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{
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int rc = PoolObjectSQL::select(db, _name, _uid);
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if ( rc != 0 )
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{
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return rc;
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}
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return vnc_bitmap.select(oid, db);
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}
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/**
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* Checks if all the collections are empty, and therefore this cluster
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* can be dropped.
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*
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* @param error_msg Error message, if any.
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* @return 0 if cluster can be dropped, -1 otherwise
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*/
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int check_drop(string& error_msg);
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/**
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* Factory method for cluster templates
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*/
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Template * get_new_template() const override
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{
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return new ClusterTemplate;
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}
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/**
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* Add a resource to the corresponding set.
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* @return 0 on success
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*/
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int add_resource(PoolObjectSQL::ObjectType type, int resource_id, string& error_msg)
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{
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ostringstream oss;
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int rc;
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switch (type)
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{
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case PoolObjectSQL::DATASTORE:
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rc = datastores.add(resource_id);
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break;
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case PoolObjectSQL::NET:
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rc = vnets.add(resource_id);
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break;
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case PoolObjectSQL::HOST:
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rc = hosts.add(resource_id);
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break;
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default:
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oss << "Invalid resource type: "<< PoolObjectSQL::type_to_str(type);
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error_msg = oss.str();
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return -1;
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}
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if (rc != 0)
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{
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oss << PoolObjectSQL::type_to_str(type) << " ID is already in the cluster set.";
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error_msg = oss.str();
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}
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return rc;
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}
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/**
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* Remove a resource from the corresponding set.
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* @return 0 on success
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*/
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int del_resource(PoolObjectSQL::ObjectType type, int resource_id, string& error_msg)
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{
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int rc;
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switch (type)
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{
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case PoolObjectSQL::DATASTORE:
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rc = datastores.del(resource_id);
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break;
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case PoolObjectSQL::NET:
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rc = vnets.del(resource_id);
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break;
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case PoolObjectSQL::HOST:
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rc = hosts.del(resource_id);
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break;
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default:
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error_msg = "Invalid resource type: " + PoolObjectSQL::type_to_str(type);
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return -1;
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}
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if (rc != 0)
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{
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error_msg = PoolObjectSQL::type_to_str(type) + " is not in the cluster set.";
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}
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return rc;
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}
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};
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#endif /*CLUSTER_H_*/
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