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one/include/HostShare.h
Ruben S. Montero 565094961a
F #4936: oned refactor
* Remove duplicit methods from NebulaUtil

    * Const correctness

    * Fix minor code quality issues

    * Remove ObjectCollection::clone()

    * Minor SSLUtil interface change

co-authored-by: Pavel Czerný <pczerny@opennebula.systems>
2020-07-05 22:01:32 +02:00

199 lines
6.5 KiB
C++

/* ------------------------------------------------------------------------ */
/* 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 HOST_SHARE_H_
#define HOST_SHARE_H_
#include "ObjectXML.h"
#include "Template.h"
#include "HostSharePCI.h"
#include "HostShareNUMA.h"
#include "HostShareDatastore.h"
#include "HostShareCapacity.h"
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/**
* The HostShare class. It represents a logical partition of a host...
*/
class HostShare : public ObjectXML
{
public:
HostShare();
~HostShare(){};
/**
* Pin policy for the host
*/
enum PinPolicy
{
PP_NONE = 0, /**< No pin. Default. */
PP_CORE = 1, /**< vCPUs are assigned to host cores exclusively */
PP_THREAD = 2, /**< vCPUS are assigned to host threads */
PP_SHARED = 3 /**< vCPUs are assigned to a set of host threads */
};
static PinPolicy str_to_pin_policy(std::string& pp_s);
/**
* Rebuilds the object from an xml node
* @param node The xml node pointer
*
* @return 0 on success, -1 otherwise
*/
int from_xml_node(const xmlNodePtr node);
/**
* Add a VM capacity to this share
* @param sr requested capacity by the VM
*/
void add(HostShareCapacity &sr);
/**
* Delete VM capacity from this share
* @param sr requested capacity by the VM
*/
void del(HostShareCapacity &sr);
/**
* Check if this share can host a VM.
* @param cpu requested by the VM
* @param mem requested by the VM
* @param disk requested by the VM
* @param pci_devs requested by the VM
* @param error Returns the error reason, if any
*
* @return true if the share can host the VM or it is the only one
* configured
*/
bool test(HostShareCapacity& sr, std::string& error) const;
/**
* Function to write a HostShare to an output stream
*/
friend std::ostream& operator<<(std::ostream& os, const HostShare& hs);
/**
* Function to print the HostShare object into a string in
* XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
std::string& to_xml(std::string& xml) const;
/**
* Set the capacity attributes of the share. CPU and Memory may reserve some
* capacity according to RESERVED_CPU and RESERVED_MEM. These values can be
* either absolute or a percentage.
*
* The function also set the PCI, NUMA and datastore information.
*
* Share values are read from the Host template returned by the monitoring
* probes. The values are removed from the template.
*
* @param ht template for the host
* @param rcpu, reserved cpu for the host
* @param rmem, reserved mem for the host
*
* NOTE: reserved strings will be modified
*/
void set_monitorization(Template& ht, std::string& rcpu, std::string& rmem);
/**
* Set the capacity attributes of the share.
* Same as the 3 parameter method, except it does not update reserved CPU and Memory
*/
void set_monitorization(Template& ht);
/**
* Resets capaity values of the share
*/
void reset_capacity()
{
total_cpu = 0;
total_mem = 0;
max_cpu = 0;
max_mem = 0;
};
/**
* Update the capacity attributes when the RESERVED_CPU and RESERVED_MEM
* are updated. This function also updates VMS_THREAD and ISOLCPUS
* @param ht, host template
* @para rcpu, reserved cpu for the host
* @para rmem, reserved mem for the host
*
* NOTE: reserved strings will be modified
*/
void update_capacity(Template& ht, std::string& rcpu, std::string& rmem);
/**
* Return the number of running VMs in this host
*/
long long get_running_vms() const
{
return running_vms;
};
long long get_total_mem() const { return total_mem; }
long long get_total_cpu() const { return total_cpu; }
long long get_max_mem() const { return max_mem; }
long long get_max_cpu() const { return max_cpu; }
private:
long long mem_usage; /**< Memory allocated to VMs (in KB) */
long long cpu_usage; /**< CPU allocated to VMs (in percentage) */
long long total_mem; /**< Total memory capacity (in KB) */
long long total_cpu; /**< Total cpu capacity (in percentage) */
long long max_mem; /**< Total memory capacity (in KB) +/- reserved */
long long max_cpu; /**< Total cpu capacity (in percentage) +/- reserved*/
long long running_vms;/**< Number of running VMs in this Host */
unsigned int vms_thread; /**< VMs that can be allocated to a thread */
HostShareDatastore ds;
HostSharePCI pci;
HostShareNUMA numa;
/**
* Check if this share can host a VM, testing only the PCI devices.
* @param pci_devs requested by the VM
* @param error Returns the error reason, if any
*
* @return true if the share can host the VM or it is the only one
* configured
*/
bool test_compute(int cpu, long long mem, std::string &error) const;
bool test_pci(std::vector<VectorAttribute *>& pci_devs, std::string& error) const;
bool test_numa(HostShareCapacity &sr, std::string& error) const;
};
#endif /*HOST_SHARE_H_*/