Examples of org.libvirt.Domain

org.libvirt.Domain

        return msg;
    }


    protected String stopVM(Connect conn, String vmName) {
        DomainInfo.DomainState state = null;
        Domain dm = null;


        s_logger.debug("Try to stop the vm at first");
        String ret = stopVM(conn, vmName, false);
        if (ret == Script.ERR_TIMEOUT) {
            ret = stopVM(conn, vmName, true);
        } else if (ret != null) {
            /*
             * There is a race condition between libvirt and qemu: libvirt
             * listens on qemu's monitor fd. If qemu is shutdown, while libvirt
             * is reading on the fd, then libvirt will report an error.
             */
            /* Retry 3 times, to make sure we can get the vm's status */
            for (int i = 0; i < 3; i++) {
                try {
                    dm = conn.domainLookupByName(vmName);
                    state = dm.getInfo().state;
                    break;
                } catch (LibvirtException e) {
                    s_logger.debug("Failed to get vm status:" + e.getMessage());
                } finally {
                    try {
                        if (dm != null) {
                            dm.free();
                        }
                    } catch (LibvirtException l) {
                        s_logger.trace("Ignoring libvirt error.", l);
                    }
                }

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        return null;
    }


    protected String stopVM(Connect conn, String vmName, boolean force) {
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);
            int persist = dm.isPersistent();
            if (force) {
                if (dm.isActive() == 1) {
                    dm.destroy();
                    if (persist == 1) {
                        dm.undefine();
                    }
                }
            } else {
                if (dm.isActive() == 0) {
                    return null;
                }
                dm.shutdown();
                int retry = _stopTimeout / 2000;
                /* Wait for the domain gets into shutoff state. When it does
                   the dm object will no longer work, so we need to catch it. */
                try {
                    while ( dm.isActive() == 1 && (retry >= 0)) {
                        Thread.sleep(2000);
                        retry--;
                    }
                } catch (LibvirtException e) {
                    String error = e.toString();
                    if (error.contains("Domain not found")) {
                        s_logger.debug("successfully shut down vm " + vmName);
                    } else {
                        s_logger.debug("Error in waiting for vm shutdown:" + error);
                    }
                }
                if (retry < 0) {
                    s_logger.warn("Timed out waiting for domain " + vmName
                            + " to shutdown gracefully");
                    return Script.ERR_TIMEOUT;
                } else {
                    if (persist == 1) {
                        dm.undefine();
                    }
                }
            }
        } catch (LibvirtException e) {
            if (e.getMessage().contains("Domain not found")) {
                s_logger.debug("VM " + vmName + " doesn't exist, no need to stop it");
                return null;
            }
            s_logger.debug("Failed to stop VM :" + vmName + " :", e);
            return e.getMessage();
        } catch (InterruptedException ie) {
            s_logger.debug("Interrupted sleep");
            return ie.getMessage();
        } finally {
            try {
                if (dm != null) {
                    dm.free();
                }
            } catch (LibvirtException e) {
                s_logger.trace("Ignoring libvirt error.", e);
            }
        }

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    }


    protected Integer getVncPort(Connect conn, String vmName)
            throws LibvirtException {
        LibvirtDomainXMLParser parser = new LibvirtDomainXMLParser();
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);
            String xmlDesc = dm.getXMLDesc(0);
            parser.parseDomainXML(xmlDesc);
            return parser.getVncPort();
        } finally {
            try {
                if (dm != null) {
                    dm.free();
                }
            } catch (LibvirtException l) {
                s_logger.trace("Ignoring libvirt error.", l);
            }
        }

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    }




    private String getGuestType(Connect conn, String vmName) {
        LibvirtDomainXMLParser parser = new LibvirtDomainXMLParser();
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);
            String xmlDesc = dm.getXMLDesc(0);
            parser.parseDomainXML(xmlDesc);
            return parser.getDescription();
        } catch (LibvirtException e) {
            s_logger.trace("Ignoring libvirt error.", e);
            return null;
        } finally {
            try {
                if (dm != null) {
                    dm.free();
                }
            } catch (LibvirtException l) {
                s_logger.trace("Ignoring libvirt error.", l);
            }
        }

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                .domainLookupByName(vmName);
    }


    protected List<InterfaceDef> getInterfaces(Connect conn, String vmName) {
        LibvirtDomainXMLParser parser = new LibvirtDomainXMLParser();
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);
            parser.parseDomainXML(dm.getXMLDesc(0));
            return parser.getInterfaces();


        } catch (LibvirtException e) {
            s_logger.debug("Failed to get dom xml: " + e.toString());
            return new ArrayList<InterfaceDef>();
        } finally {
            try {
                if (dm != null) {
                    dm.free();
                }
            } catch (LibvirtException e) {
                s_logger.trace("Ignoring libvirt error.", e);
            }
        }

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        }
    }


    public List<DiskDef> getDisks(Connect conn, String vmName) {
        LibvirtDomainXMLParser parser = new LibvirtDomainXMLParser();
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);
            parser.parseDomainXML(dm.getXMLDesc(0));
            return parser.getDisks();


        } catch (LibvirtException e) {
            s_logger.debug("Failed to get dom xml: " + e.toString());
            return new ArrayList<DiskDef>();
        } finally {
            try {
                if (dm != null) {
                    dm.free();
                }
            } catch (LibvirtException e) {
                s_logger.trace("Ignoring libvirt error.", e);
            }
        }

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    private List<VmDiskStatsEntry> getVmDiskStat(Connect conn, String vmName)
            throws LibvirtException {
        Domain dm = null;
        try {
            dm = getDomain(conn, vmName);


            List<VmDiskStatsEntry> stats = new ArrayList<VmDiskStatsEntry>();


            List<DiskDef> disks = getDisks(conn, vmName);


            for (DiskDef disk : disks) {
                DomainBlockStats blockStats = dm.blockStats(disk.getDiskLabel());
                String path = disk.getDiskPath(); // for example, path = /mnt/pool_uuid/disk_path/
                String diskPath = null;
                if (path != null) {
                    String[] token = path.split("/");
                    if (token.length > 3) {
                        diskPath = token[3];
                        VmDiskStatsEntry stat = new VmDiskStatsEntry(vmName, diskPath, blockStats.wr_req, blockStats.rd_req, blockStats.wr_bytes, blockStats.rd_bytes);
                        stats.add(stat);
                    }
                }
            }


            return stats;
        } finally {
            if (dm != null) {
                dm.free();
            }
        }
    }

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        Calendar _timestamp;
    }


    private VmStatsEntry getVmStat(Connect conn, String vmName)
            throws LibvirtException {
        Domain dm = null;
        try {
            dm = getDomain(conn, vmName);
            DomainInfo info = dm.getInfo();


            VmStatsEntry stats = new VmStatsEntry();
            stats.setNumCPUs(info.nrVirtCpu);
            stats.setEntityType("vm");


            /* get cpu utilization */
            vmStats oldStats = null;


            Calendar now = Calendar.getInstance();


            oldStats = _vmStats.get(vmName);


            long elapsedTime = 0;
            if (oldStats != null) {
                elapsedTime = now.getTimeInMillis()
                        - oldStats._timestamp.getTimeInMillis();
                double utilization = (info.cpuTime - oldStats._usedTime)
                        / ((double) elapsedTime * 1000000);


                NodeInfo node = conn.nodeInfo();
                utilization = utilization / node.cpus;
                if(utilization > 0){
                    stats.setCPUUtilization(utilization * 100);
                }
            }


            /* get network stats */


            List<InterfaceDef> vifs = getInterfaces(conn, vmName);
            long rx = 0;
            long tx = 0;
            for (InterfaceDef vif : vifs) {
                DomainInterfaceStats ifStats = dm.interfaceStats(vif
                        .getDevName());
                rx += ifStats.rx_bytes;
                tx += ifStats.tx_bytes;
            }


            if (oldStats != null) {
                long deltarx = rx - oldStats._rx;
                if (deltarx > 0)
                    stats.setNetworkReadKBs(deltarx / 1024);
                long deltatx = tx - oldStats._tx;
                if (deltatx > 0)
                    stats.setNetworkWriteKBs(deltatx / 1024);
            }


            /* get disk stats */
            List<DiskDef> disks = getDisks(conn, vmName);
            long io_rd = 0;
            long io_wr = 0;
            long bytes_rd = 0;
            long bytes_wr = 0;
            for (DiskDef disk : disks) {
                DomainBlockStats blockStats = dm.blockStats(disk.getDiskLabel());
                io_rd += blockStats.rd_req;
                io_wr += blockStats.wr_req;
                bytes_rd += blockStats.rd_bytes;
                bytes_wr += blockStats.wr_bytes;
            }
            
            if (oldStats != null) {
                long deltaiord = io_rd - oldStats._io_rd;
                if (deltaiord > 0)
                    stats.setDiskReadIOs(deltaiord);
                long deltaiowr = io_wr - oldStats._io_wr;
                if (deltaiowr > 0)
                    stats.setDiskWriteIOs(deltaiowr);
                long deltabytesrd = bytes_rd - oldStats._bytes_rd;
                if (deltabytesrd > 0)
                    stats.setDiskReadKBs(deltabytesrd / 1024);
                long deltabyteswr = bytes_wr - oldStats._bytes_wr;
                if (deltabyteswr > 0)
                    stats.setDiskWriteKBs(deltabyteswr / 1024);
            }
            
            /* save to Hashmap */
            vmStats newStat = new vmStats();
            newStat._usedTime = info.cpuTime;
            newStat._rx = rx;
            newStat._tx = tx;
            newStat._io_rd = io_rd;
            newStat._io_wr = io_wr;
            newStat._bytes_rd = bytes_rd;
            newStat._bytes_wr = bytes_wr;
            newStat._timestamp = now;
            _vmStats.put(vmName, newStat);
            return stats;
        } finally {
            if (dm != null) {
                dm.free();
            }
        }
    }

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            }


            /* Delete the snapshot on primary */


            DomainInfo.DomainState state = null;
            Domain vm = null;
            if (vmName != null) {
                try {
                    vm = this.resource.getDomain(conn, vmName);
                    state = vm.getInfo().state;
                } catch (LibvirtException e) {
                    s_logger.trace("Ignoring libvirt error.", e);
                }
            }


            KVMStoragePool primaryStorage = storagePoolMgr.getStoragePool(primaryStore.getPoolType(),
                    primaryStore.getUuid());
            if (state == DomainInfo.DomainState.VIR_DOMAIN_RUNNING && !primaryStorage.isExternalSnapshot()) {
                DomainSnapshot snap = vm.snapshotLookupByName(snapshotName);
                snap.delete(0);


                /*
                 * libvirt on RHEL6 doesn't handle resume event emitted from
                 * qemu
                 */
                vm = this.resource.getDomain(conn, vmName);
                state = vm.getInfo().state;
                if (state == DomainInfo.DomainState.VIR_DOMAIN_PAUSED) {
                    vm.resume();
                }
            } else {
                if (primaryPool.getType() != StoragePoolType.RBD) {
                    Script command = new Script(_manageSnapshotPath, _cmdsTimeout, s_logger);
                    command.add("-d", snapshotDisk.getPath());

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        return new Answer(cmd);
    }


    protected synchronized String attachOrDetachDevice(Connect conn, boolean attach, String vmName, String xml)
            throws LibvirtException, InternalErrorException {
        Domain dm = null;
        try {
            dm = conn.domainLookupByName(vmName);


            if (attach) {
                s_logger.debug("Attaching device: " + xml);
                dm.attachDevice(xml);
            } else {
                s_logger.debug("Detaching device: " + xml);
                dm.detachDevice(xml);
            }
        } catch (LibvirtException e) {
            if (attach) {
                s_logger.warn("Failed to attach device to " + vmName + ": " + e.getMessage());
            } else {
                s_logger.warn("Failed to detach device from " + vmName + ": " + e.getMessage());
            }
            throw e;
        } finally {
            if (dm != null) {
                try {
                    dm.free();
                } catch (LibvirtException l) {
                    s_logger.trace("Ignoring libvirt error.", l);
                }
            }
        }

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Related Classes of org.libvirt.Domain

com.cloud.hypervisor.kvm.resource.LibvirtComputingResource

com.cloud.hypervisor.kvm.resource.LibvirtComputingResourceTest

com.cloud.hypervisor.kvm.storage.KVMStorageProcessor

org.jclouds.libvirt.compute.strategy.LibvirtComputeServiceAdapter

org.rhq.plugins.virt.LibVirtConnection

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