| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // 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. |
| package org.apache.cloudstack.utils.linux; |
| |
| import com.cloud.hypervisor.kvm.resource.LibvirtCapXMLParser; |
| import com.cloud.hypervisor.kvm.resource.LibvirtConnection; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.log4j.Logger; |
| import org.libvirt.Connect; |
| import org.libvirt.LibvirtException; |
| import org.libvirt.NodeInfo; |
| |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class KVMHostInfo { |
| |
| private static final Logger LOGGER = Logger.getLogger(KVMHostInfo.class); |
| |
| private int cpus; |
| private int cpusockets; |
| private long cpuSpeed; |
| private long totalMemory; |
| private long reservedMemory; |
| private long overCommitMemory; |
| private List<String> capabilities = new ArrayList<>(); |
| |
| public KVMHostInfo(long reservedMemory, long overCommitMemory) { |
| this.reservedMemory = reservedMemory; |
| this.overCommitMemory = overCommitMemory; |
| this.getHostInfoFromLibvirt(); |
| this.totalMemory = new MemStat(this.getReservedMemory(), this.getOverCommitMemory()).getTotal(); |
| } |
| |
| public int getCpus() { |
| return this.cpus; |
| } |
| |
| public int getCpuSockets() { |
| return this.cpusockets; |
| } |
| |
| public long getCpuSpeed() { |
| return this.cpuSpeed; |
| } |
| |
| public long getTotalMemory() { |
| return this.totalMemory; |
| } |
| |
| public long getReservedMemory() { |
| return this.reservedMemory; |
| } |
| |
| public long getOverCommitMemory() { |
| return this.overCommitMemory; |
| } |
| |
| public List<String> getCapabilities() { |
| return this.capabilities; |
| } |
| |
| protected static long getCpuSpeed(final NodeInfo nodeInfo) { |
| try (final Reader reader = new FileReader( |
| "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq")) { |
| return Long.parseLong(IOUtils.toString(reader).trim()) / 1000; |
| } catch (IOException | NumberFormatException e) { |
| LOGGER.info("Could not read cpuinfo_max_freq, falling back on libvirt"); |
| return nodeInfo.mhz; |
| } |
| } |
| |
| private void getHostInfoFromLibvirt() { |
| try { |
| final Connect conn = LibvirtConnection.getConnection(); |
| final NodeInfo hosts = conn.nodeInfo(); |
| this.cpuSpeed = getCpuSpeed(hosts); |
| |
| /* |
| * Some CPUs report a single socket and multiple NUMA cells. |
| * We need to multiply them to get the correct socket count. |
| */ |
| this.cpusockets = hosts.sockets; |
| if (hosts.nodes > 0) { |
| this.cpusockets = hosts.sockets * hosts.nodes; |
| } |
| this.cpus = hosts.cpus; |
| |
| final LibvirtCapXMLParser parser = new LibvirtCapXMLParser(); |
| parser.parseCapabilitiesXML(conn.getCapabilities()); |
| final ArrayList<String> oss = parser.getGuestOsType(); |
| for (final String s : oss) { |
| /* |
| * Even host supports guest os type more than hvm, we only |
| * report hvm to management server |
| */ |
| String hvmCapability = "hvm"; |
| if (s.equalsIgnoreCase(hvmCapability)) { |
| if (!this.capabilities.contains(hvmCapability)) { |
| this.capabilities.add(hvmCapability); |
| } |
| } |
| } |
| |
| /* |
| Any modern Qemu/KVM supports snapshots |
| We used to check if this was supported, but that is no longer required |
| */ |
| this.capabilities.add("snapshot"); |
| conn.close(); |
| } catch (final LibvirtException e) { |
| LOGGER.error("Caught libvirt exception while fetching host information", e); |
| } |
| } |
| } |