Examples with LVM com.cloud.agent.resource.kvm.storage.utils.LVM used on opensource projects

Example 1 with LVM

use of com.cloud.agent.resource.kvm.storage.utils.LVM in project cosmic by MissionCriticalCloud.

the class LibvirtResizeVolumeCommandWrapper method execute.

@Override
public Answer execute(final ResizeVolumeCommand command, final LibvirtComputingResource libvirtComputingResource) {
    final String volid = command.getPath();
    final long newSize = command.getNewSize();
    final long currentSize = command.getCurrentSize();
    final String vmInstanceName = command.getInstanceName();
    final boolean shrinkOk = command.getShrinkOk();
    final StorageFilerTO spool = command.getPool();
    if (currentSize == newSize) {
        s_logger.info("No need to resize volume: current size " + currentSize + " is same as new size " + newSize);
        return new ResizeVolumeAnswer(command, true, "success", currentSize);
    }
    final KvmStoragePoolManager storagePoolMgr = libvirtComputingResource.getStoragePoolMgr();
    final KvmStoragePool pool = storagePoolMgr.getStoragePool(spool.getType(), spool.getUuid());
    final KvmPhysicalDisk vol = pool.getPhysicalDisk(volid);
    final String path = vol.getPath();
    s_logger.debug("Resizing volume: " + path + "," + currentSize + "," + newSize + "," + vol.getFormat() + "," + vmInstanceName + "," + shrinkOk);
    if (pool.getType() == StoragePoolType.RBD) {
        s_logger.debug("Volume " + path + " is on a RBD storage pool. No need to query for additional information.");
    } else if (pool.getType() == StoragePoolType.LVM || pool.getType() == StoragePoolType.CLVM) {
        s_logger.debug("Volume " + path + " can be resized by libvirt. Asking libvirt to resize the volume.");
        final LVM lvm = new LVM(command.getWait());
        try {
            // 1. Resize the logical volume
            lvm.resize(newSize, vol.getPath());
            // 2. If the volume is attached to a virtualmachine, notify libvirt domain of the size change
            libvirtBlockResize(libvirtComputingResource, newSize, vmInstanceName, vol);
        } catch (final LVMException e) {
            // First step went wrong, nothing to clean up. Just return that it didn't work out.
            return new ResizeVolumeAnswer(command, false, e.toString());
        } catch (final LibvirtException e) {
            // Second step went wrong, we should resize the volume back to how it was!
            try {
                lvm.resize(currentSize, vol.getPath());
            } catch (final LVMException e1) {
                s_logger.error("Unable to reverse lv resize: " + e1);
            }
            return new ResizeVolumeAnswer(command, false, e.toString());
        }
    } else if (pool.getType() == StoragePoolType.NetworkFilesystem) {
        if (vol.getFormat() == PhysicalDiskFormat.QCOW2 && shrinkOk) {
            return new ResizeVolumeAnswer(command, false, "Unable to shrink volumes of type " + PhysicalDiskFormat.QCOW2);
        }
        try {
            final LibvirtUtilitiesHelper libvirtUtilitiesHelper = libvirtComputingResource.getLibvirtUtilitiesHelper();
            final Connect connection = libvirtUtilitiesHelper.getConnection();
            final StorageVol storageVol = connection.storageVolLookupByPath(vol.getPath());
            final VirtualMachine.PowerState state = libvirtComputingResource.getVmState(libvirtUtilitiesHelper.getConnection(), vmInstanceName);
            if (state == VirtualMachine.PowerState.PowerOn) {
                libvirtBlockResize(libvirtComputingResource, newSize, vmInstanceName, vol);
            } else {
                final int flags = shrinkOk ? StorageVol.ResizeFlags.SHRINK : 0;
                storageVol.resize(newSize, flags);
            }
        } catch (final LibvirtException e) {
            return new ResizeVolumeAnswer(command, false, e.toString());
        }
    }
    /* fetch new size as seen from libvirt, don't want to assume anything */
    pool.refresh();
    final long finalSize = pool.getPhysicalDisk(volid).getVirtualSize();
    s_logger.debug("after resize, size reports as " + finalSize + ", requested " + newSize);
    return new ResizeVolumeAnswer(command, true, "success", finalSize);
}