mirror of
https://github.com/OpenNebula/one.git
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522 lines
15 KiB
C++
522 lines
15 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2019, 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 HOST_H_
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#define HOST_H_
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#include "PoolSQL.h"
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#include "HostTemplate.h"
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#include "HostShare.h"
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#include "ClusterableSingle.h"
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#include "ObjectCollection.h"
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#include "NebulaLog.h"
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#include "NebulaUtil.h"
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using namespace std;
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/**
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* The Host class.
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*/
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class Host : public PoolObjectSQL, public ClusterableSingle
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{
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public:
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// HOST STATES +----------------+
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// | VM DEPLOYMENT |
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// +----------------+------------+--------+-------+
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// | STATE | MONITORING | MANUAL | SCHED |
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// +----------------+------------+--------+-------+
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// | INIT/MONITORED | Yes | Yes |
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// +----------------+------------+--------+-------+
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// | DISABLED | Yes | Yes | No |
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// +----------------+------------+----------------+
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// | OFFLINE | No | No |
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// +----------------+-----------------------------+
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enum HostState
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{
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INIT = 0, /**< Initial state for enabled hosts. */
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MONITORING_MONITORED = 1, /**< Monitoring the host (from monitored). */
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MONITORED = 2, /**< The host has been monitored. */
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ERROR = 3, /**< An error ocurrer in host monitoring. */
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DISABLED = 4, /**< The host is disabled see above. */
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MONITORING_ERROR = 5, /**< Monitoring the host (from error). */
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MONITORING_INIT = 6, /**< Monitoring the host (from init). */
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MONITORING_DISABLED = 7, /**< Monitoring the host (from disabled). */
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OFFLINE = 8 /**< The host is set offline, see above */
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};
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/**
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* Function to print the Host 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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/**
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* Checks if the host is a remote public cloud
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* @return true if the host is a remote public cloud
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*/
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bool is_public_cloud() const;
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/**
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* Sets the current host offline, it will not be monitored nor used by the
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* scheduler, manual VM deployment is also restricted
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*/
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void offline();
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/**
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* Sets the current host disable, it will receive monitor updates, manual
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* deployment of VMs is allowed and the scheduler will not consider this
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* host.
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*/
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void disable();
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/**
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* Enables the current host, it will be monitored and could be used by
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* the scheduler
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*/
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void enable();
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/**
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* Sets the host in error
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*/
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void set_error()
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{
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state = ERROR;
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}
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/**
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* Updates the Host's last_monitored time stamp.
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* @param success if the monitored action was successfully performed
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*/
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void touch(bool success)
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{
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last_monitored = time(0);
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switch (state)
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{
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case OFFLINE:
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state = OFFLINE;
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break;
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case DISABLED:
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case MONITORING_DISABLED:
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state = DISABLED;
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break;
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case INIT:
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case ERROR:
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case MONITORED:
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case MONITORING_ERROR:
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case MONITORING_INIT:
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case MONITORING_MONITORED:
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if (success == true)
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{
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state = MONITORED;
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}
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else
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{
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state = ERROR;
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}
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break;
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}
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};
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/**
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* Update host after a successful monitor. It modifies counters, state
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* and template attributes
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* @param parse_str string with values to be parsed
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* @param with_vm_info if monitoring contains VM information
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* @param lost set of VMs that should be in the host and were not found
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* @param found VMs running in the host (as expected) and info.
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* @param reserved_cpu from cluster defaults
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* @param reserved_mem from cluster defaults
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* @return 0 on success
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**/
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int update_info(Template &tmpl,
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bool &with_vm_info,
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set<int> &lost,
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map<int,string> &found,
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const set<int> &non_shared_ds,
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const string& reserved_cpu,
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const string& reserved_mem);
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/**
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* Extracts the DS attributes from the given template
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* @param parse_str string with values to be parsed
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* @param ds map of DS monitoring information
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* @param template object parsed from parse_str
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*
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* @return 0 on success
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*/
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int extract_ds_info(
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string &parse_str,
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Template &tmpl,
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map<int, const VectorAttribute*> &ds);
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/**
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* Update host after a failed monitor. It state
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* and template attributes
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* @param message from the driver
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* @param vm_ids running on the host
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*/
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void error_info(const string& message, set<int> &vm_ids);
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/**
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* Inserts the last monitoring, and deletes old monitoring entries.
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*
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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_monitoring(SqlDB * db);
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/**
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* Retrieves host state
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* @return HostState code number
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*/
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HostState get_state() const
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{
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return state;
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};
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/**
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* Retrieves VMM mad name
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* @return string vmm mad name
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*/
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const string& get_vmm_mad() const
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{
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return vmm_mad_name;
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};
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/**
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* Retrieves IM mad name
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* @return string im mad name
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*/
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const string& get_im_mad() const
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{
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return im_mad_name;
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};
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/**
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* Sets the corresponding monitoring state based on the actual host state
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*/
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void set_monitoring_state()
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{
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last_monitored = time(0); //Needed to expire this monitor action
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switch (state)
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{
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case ERROR:
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state = MONITORING_ERROR;
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break;
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case MONITORED:
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state = MONITORING_MONITORED;
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break;
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case INIT:
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state = MONITORING_INIT;
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break;
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case DISABLED:
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state = MONITORING_DISABLED;
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break;
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default:
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break;
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}
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};
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/**
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* Retrieves last time the host was monitored
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* @return time_t last monitored time
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*/
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time_t get_last_monitored() const
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{
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return last_monitored;
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};
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/**
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* Get the reserved capacity for this host. Parameters will be only updated
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* if values are defined in the host. Reserved capacity will be subtracted
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* from the Host total capacity.
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* @param cpu reserved cpu (in percentage)
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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)
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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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// Share functions.
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// -------------------------------------------------------------------------
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long long get_share_running_vms()
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{
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return host_share.get_running_vms();
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}
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/**
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* Adds a new VM to the host share by incrementing usage counters
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* @param sr the capacity request of the VM
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* @return 0 on success
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*/
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void add_capacity(HostShareCapacity &sr)
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{
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if ( vm_collection.add(sr.vmid) == 0 )
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{
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host_share.add(sr);
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}
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else
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{
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ostringstream oss;
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oss << "VM " << sr.vmid << " is already in host " << oid << ".";
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NebulaLog::log("ONE", Log::ERROR, oss);
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}
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};
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/**
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* Deletes a new VM to the host share by incrementing usage counters
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* @param sr the capacity request of the VM
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* @return 0 on success
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*/
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void del_capacity(HostShareCapacity& sr)
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{
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if ( vm_collection.del(sr.vmid) == 0 )
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{
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host_share.del(sr);
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}
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else
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{
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ostringstream oss;
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oss << "VM " << sr.vmid << " is not in host " << oid << ".";
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NebulaLog::log("ONE", Log::ERROR, oss);
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}
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};
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/**
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* Tests whether a VM device capacity can be allocated in the host
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* @param sr capacity requested by the VM
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* @param error returns the error reason, if any
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*
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* @return true if the share can host the VM
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*/
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bool test_capacity(HostShareCapacity &sr, string& error)
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{
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return host_share.test(sr, error);
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}
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/**
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* Returns a copy of the VM IDs set
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*/
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set<int> get_vm_ids()
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{
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return vm_collection.clone();
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}
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/**
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* Factory method for host 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 HostTemplate;
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}
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/**
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* Executed after an update operation to process the new template
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* - encrypt secret attributes.
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*/
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int post_update_template(string& error) override;
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/**
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* Returns the rediscovered VMs (from poff to running) in the previous
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* monitorization cycle
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* @return the previous rediscovered VMs (from poff to running)
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*/
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const set<int>& get_prev_rediscovered_vms() const
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{
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return *prev_rediscovered_vms;
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}
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/**
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* Sets the previous rediscovered VMs (from poff to running). This set
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* is not stored in the DB, the pool update method is not needed
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* @param rediscovered_vms the previous rediscovered VMs (from poff to running)
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*/
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void set_prev_rediscovered_vms(const set<int>& rediscovered_vms)
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{
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*prev_rediscovered_vms = rediscovered_vms;
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}
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class HostPool;
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// -------------------------------------------------------------------------
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// Host Description
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// -------------------------------------------------------------------------
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/**
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* The state of the Host
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*/
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HostState state;
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/**
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* Name of the IM driver used to monitor this host
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*/
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string im_mad_name;
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/**
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* Name of the VM driver used to execute VMs in this host
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*/
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string vmm_mad_name;
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/**
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* If Host State = MONITORED last time it got fully monitored or 1 Jan 1970
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* Host State = MONITORING* last time it got a signal to be monitored
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*/
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time_t last_monitored;
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// -------------------------------------------------------------------------
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// Host Attributes
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// -------------------------------------------------------------------------
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/**
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* The Share represents the logical capacity associated with the host
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*/
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HostShare host_share;
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/**
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* Tmp set of lost VM IDs. Used to give lost VMs one grace cycle, in case
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* they reappear.
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*/
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set<int> * tmp_lost_vms;
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/**
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* Tmp set of zombie VM IDs. Used to give zombie VMs one grace cycle, in
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* case they are cleaned.
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*/
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set<int> * tmp_zombie_vms;
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/**
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* Set that stores the VMs reported as found from the poweroff state. This
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* is managed from outside the host to avoid deadlocks, as the current
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* VM state is needed
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*/
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set<int> * prev_rediscovered_vms;
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// -------------------------------------------------------------------------
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// VM Collection
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// -------------------------------------------------------------------------
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/**
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* Stores a collection with the VMs running in the host
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*/
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ObjectCollection vm_collection;
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// *************************************************************************
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// Constructor
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// *************************************************************************
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Host(int id,
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const string& hostname,
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const string& im_mad_name,
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const string& vmm_mad_name,
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int cluster_id,
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const string& cluster_name);
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virtual ~Host() = default;
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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 * monit_db_names;
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static const char * monit_db_bootstrap;
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static const char * monit_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 Host
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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_host(Host::db_bootstrap);
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ostringstream oss_monit(Host::monit_db_bootstrap);
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rc = db->exec_local_wr(oss_host);
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rc += db->exec_local_wr(oss_monit);
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return rc;
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};
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/**
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* Writes the Host and its associated HostShares 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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return insert_replace(db, false, error_str);
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};
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/**
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* Writes/updates the Hosts 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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#endif /*HOST_H_*/
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