package org.ovirt.engine.core.bll.scheduling.policyunits;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.math.NumberUtils;
import org.ovirt.engine.core.bll.scheduling.PolicyUnitImpl;
import org.ovirt.engine.core.bll.scheduling.PolicyUnitParameter;
import org.ovirt.engine.core.bll.scheduling.SchedulingUnit;
import org.ovirt.engine.core.bll.scheduling.pending.PendingResourceManager;
import org.ovirt.engine.core.bll.scheduling.pending.PendingVM;
import org.ovirt.engine.core.common.businessentities.Cluster;
import org.ovirt.engine.core.common.businessentities.VDS;
import org.ovirt.engine.core.common.businessentities.VM;
import org.ovirt.engine.core.common.config.Config;
import org.ovirt.engine.core.common.config.ConfigValues;
import org.ovirt.engine.core.common.scheduling.PolicyUnit;
import org.ovirt.engine.core.common.scheduling.PolicyUnitType;
import org.ovirt.engine.core.common.utils.Pair;
import org.ovirt.engine.core.compat.Guid;
@SchedulingUnit(
guid = "3ba8c988-f779-42c0-90ce-caa8243edee7",
name = "OptimalForEvenGuestDistribution",
type = PolicyUnitType.WEIGHT,
parameters = {
PolicyUnitParameter.SPM_VM_GRACE
}
)
public class EvenGuestDistributionWeightPolicyUnit extends PolicyUnitImpl {
final int spmVmGrace;
public EvenGuestDistributionWeightPolicyUnit (PolicyUnit policyUnit,
PendingResourceManager pendingResourceManager) {
super(policyUnit, pendingResourceManager);
spmVmGrace = Config.<Integer> getValue(ConfigValues.SpmVmGraceForEvenGuestDistribute);
}
private int getOccupiedVmSlots(VDS vds, Map<String, String> parameters) {
int occupiedSlots = vds.getVmActive();
final int SPMVMCountGrace = NumberUtils.toInt(parameters.get(PolicyUnitParameter.SPM_VM_GRACE.getDbName()),
spmVmGrace);
if (vds.isSpm()) {
occupiedSlots += SPMVMCountGrace;
}
occupiedSlots += PendingVM.collectForHost(getPendingResourceManager(), vds.getId()).size();
return occupiedSlots;
}
private int calcEvenGuestDistributionScore(VDS vds, Map<String, String> parameters) {
return Math.max(0, getOccupiedVmSlots(vds, parameters));
}
@Override
public List<Pair<Guid, Integer>> score(Cluster cluster, List<VDS> hosts, VM vm, Map<String, String> parameters) {
List<Pair<Guid, Integer>> scores = new ArrayList<>();
for (VDS vds : hosts) {
scores.add(new Pair<>(vds.getId(), calcEvenGuestDistributionScore(vds, parameters)));
}
return scores;
}
}