// 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 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.
package com.cloud.storage.allocator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.ejb.Local;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;
import com.cloud.deploy.DeploymentPlan;
import com.cloud.deploy.DeploymentPlanner.ExcludeList;
import com.cloud.server.StatsCollector;
import com.cloud.storage.StoragePool;
import com.cloud.storage.StoragePoolVO;
import com.cloud.storage.VMTemplateVO;
import com.cloud.vm.DiskProfile;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;
@Component
@Local(value=StoragePoolAllocator.class)
public class RandomStoragePoolAllocator extends AbstractStoragePoolAllocator {
private static final Logger s_logger = Logger.getLogger(RandomStoragePoolAllocator.class);
@Override
public boolean allocatorIsCorrectType(DiskProfile dskCh) {
return true;
}
@Override
public List<StoragePool> allocateToPool(DiskProfile dskCh, VirtualMachineProfile<? extends VirtualMachine> vmProfile, DeploymentPlan plan, ExcludeList avoid, int returnUpTo) {
List<StoragePool> suitablePools = new ArrayList<StoragePool>();
VMTemplateVO template = (VMTemplateVO)vmProfile.getTemplate();
// Check that the allocator type is correct
if (!allocatorIsCorrectType(dskCh)) {
return suitablePools;
}
long dcId = plan.getDataCenterId();
Long podId = plan.getPodId();
Long clusterId = plan.getClusterId();
s_logger.debug("Looking for pools in dc: " + dcId + " pod:" + podId + " cluster:" + clusterId);
List<StoragePoolVO> pools = _storagePoolDao.listBy(dcId, podId, clusterId);
if (pools.size() == 0) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("No storage pools available for allocation, returning");
}
return suitablePools;
}
StatsCollector sc = StatsCollector.getInstance();
Collections.shuffle(pools);
if (s_logger.isDebugEnabled()) {
s_logger.debug("RandomStoragePoolAllocator has " + pools.size() + " pools to check for allocation");
}
for (StoragePoolVO pool: pools) {
if(suitablePools.size() == returnUpTo){
break;
}
if (checkPool(avoid, pool, dskCh, template, null, sc, plan)) {
suitablePools.add(pool);
}
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("RandomStoragePoolAllocator returning "+suitablePools.size() +" suitable storage pools");
}
return suitablePools;
}
}