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// 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,
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// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.network.lb;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import javax.inject.Inject;
import org.apache.cloudstack.api.command.user.loadbalancer.CreateLoadBalancerRuleCmd;
import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.engine.orchestration.service.NetworkOrchestrationService;
import org.apache.log4j.Logger;
import com.cloud.configuration.ConfigurationManagerImpl;
import com.cloud.dc.DataCenter;
import com.cloud.dc.Pod;
import com.cloud.dc.PodVlanMapVO;
import com.cloud.dc.Vlan.VlanType;
import com.cloud.dc.dao.ClusterDao;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.dc.dao.HostPodDao;
import com.cloud.dc.dao.PodVlanMapDao;
import com.cloud.deploy.DataCenterDeployment;
import com.cloud.deploy.DeployDestination;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientAddressCapacityException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.NetworkRuleConflictException;
import com.cloud.network.ElasticLbVmMapVO;
import com.cloud.network.IpAddressManager;
import com.cloud.network.Network;
import com.cloud.network.Network.Provider;
import com.cloud.network.Network.Service;
import com.cloud.network.NetworkModel;
import com.cloud.network.PhysicalNetworkServiceProvider;
import com.cloud.network.VirtualRouterProvider;
import com.cloud.network.VirtualRouterProvider.Type;
import com.cloud.network.addr.PublicIp;
import com.cloud.network.dao.IPAddressDao;
import com.cloud.network.dao.IPAddressVO;
import com.cloud.network.dao.LoadBalancerDao;
import com.cloud.network.dao.LoadBalancerVO;
import com.cloud.network.dao.NetworkDao;
import com.cloud.network.dao.NetworkVO;
import com.cloud.network.dao.PhysicalNetworkServiceProviderDao;
import com.cloud.network.dao.VirtualRouterProviderDao;
import com.cloud.network.lb.dao.ElasticLbVmMapDao;
import com.cloud.network.router.VirtualRouter.RedundantState;
import com.cloud.network.router.VirtualRouter.Role;
import com.cloud.network.rules.LoadBalancer;
import com.cloud.offering.NetworkOffering;
import com.cloud.offering.ServiceOffering;
import com.cloud.offerings.dao.NetworkOfferingDao;
import com.cloud.service.ServiceOfferingVO;
import com.cloud.service.dao.ServiceOfferingDao;
import com.cloud.storage.VMTemplateVO;
import com.cloud.storage.dao.VMTemplateDao;
import com.cloud.user.Account;
import com.cloud.user.AccountService;
import com.cloud.user.UserVO;
import com.cloud.user.dao.AccountDao;
import com.cloud.user.dao.UserDao;
import com.cloud.utils.db.DB;
import com.cloud.utils.db.SearchBuilder;
import com.cloud.utils.db.SearchCriteria;
import com.cloud.utils.db.Transaction;
import com.cloud.utils.db.TransactionCallbackWithException;
import com.cloud.utils.db.TransactionStatus;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.DomainRouterVO;
import com.cloud.vm.NicProfile;
import com.cloud.vm.VirtualMachine.State;
import com.cloud.vm.VirtualMachineManager;
import com.cloud.vm.VirtualMachineName;
import com.cloud.vm.VirtualMachineProfile;
import com.cloud.vm.VirtualMachineProfile.Param;
import com.cloud.vm.dao.DomainRouterDao;
public class LoadBalanceRuleHandler {
private static final Logger s_logger = Logger.getLogger(LoadBalanceRuleHandler.class);
@Inject
private IPAddressDao _ipAddressDao;
@Inject
private NetworkModel _networkModel;
@Inject
private NetworkOrchestrationService _networkMgr;
@Inject
private final LoadBalancerDao _loadBalancerDao = null;
@Inject
private LoadBalancingRulesManager _lbMgr;
@Inject
private final DomainRouterDao _routerDao = null;
@Inject
protected HostPodDao _podDao = null;
@Inject
protected ClusterDao _clusterDao;
@Inject
private final DataCenterDao _dcDao = null;
@Inject
private IpAddressManager _ipAddrMgr;
@Inject
protected NetworkDao _networkDao;
@Inject
protected NetworkOfferingDao _networkOfferingDao;
@Inject
private final VMTemplateDao _templateDao = null;
@Inject
private VirtualMachineManager _itMgr;
@Inject
private AccountService _accountService;
@Inject
private LoadBalancerDao _lbDao;
@Inject
private PodVlanMapDao _podVlanMapDao;
@Inject
private ElasticLbVmMapDao _elbVmMapDao;
@Inject
private AccountDao _accountDao;
@Inject
private PhysicalNetworkServiceProviderDao _physicalProviderDao;
@Inject
private VirtualRouterProviderDao _vrProviderDao;
@Inject
private ServiceOfferingDao _serviceOfferingDao;
@Inject
private UserDao _userDao;
static final private String ELB_VM_NAME_PREFIX = "l";
private final String _instance;
private final Account _systemAcct;
public LoadBalanceRuleHandler(String instance, Account systemAcct) {
_instance = instance;
_systemAcct = systemAcct;
}
public void handleDeleteLoadBalancerRule(final LoadBalancer lb, final long userId, final Account caller) {
final List<LoadBalancerVO> remainingLbs = _loadBalancerDao.listByIpAddress(lb.getSourceIpAddressId());
if (remainingLbs.size() == 0) {
s_logger.debug("ELB mgr: releasing ip " + lb.getSourceIpAddressId() + " since no LB rules remain for this ip address");
releaseIp(lb.getSourceIpAddressId(), userId, caller);
}
}
public LoadBalancer handleCreateLoadBalancerRule(final CreateLoadBalancerRuleCmd lb, Account account, final long networkId) throws InsufficientAddressCapacityException,
NetworkRuleConflictException {
//this part of code is executed when the LB provider is Elastic Load Balancer vm
if (!_networkModel.isProviderSupportServiceInNetwork(lb.getNetworkId(), Service.Lb, Provider.ElasticLoadBalancerVm)) {
return null;
}
final Long ipId = lb.getSourceIpAddressId();
if (ipId != null) {
return null;
}
account = _accountDao.acquireInLockTable(account.getId());
if (account == null) {
s_logger.warn("ELB: CreateLoadBalancer: Failed to acquire lock on account");
throw new CloudRuntimeException("Failed to acquire lock on account");
}
try {
return handleCreateLoadBalancerRuleWithLock(lb, account, networkId);
} finally {
if (account != null) {
_accountDao.releaseFromLockTable(account.getId());
}
}
}
private DomainRouterVO deployLoadBalancerVM(final Long networkId, final IPAddressVO ipAddr) {
final NetworkVO network = _networkDao.findById(networkId);
final DataCenter dc = _dcDao.findById(network.getDataCenterId());
final Long podId = getPodIdForDirectIp(ipAddr);
final Pod pod = podId == null ? null : _podDao.findById(podId);
final Map<VirtualMachineProfile.Param, Object> params = new HashMap<VirtualMachineProfile.Param, Object>(1);
params.put(VirtualMachineProfile.Param.ReProgramGuestNetworks, true);
final Account owner = _accountService.getActiveAccountByName("system", new Long(1));
final DeployDestination dest = new DeployDestination(dc, pod, null, null);
s_logger.debug("About to deploy ELB vm ");
try {
final DomainRouterVO elbVm = deployELBVm(network, dest, owner, params);
if (elbVm == null) {
throw new InvalidParameterValueException("Could not deploy or find existing ELB VM");
}
s_logger.debug("Deployed ELB vm = " + elbVm);
return elbVm;
} catch (final Throwable t) {
s_logger.warn("Error while deploying ELB VM: ", t);
return null;
}
}
private DomainRouterVO deployELBVm(Network guestNetwork, final DeployDestination dest, Account owner, final Map<Param, Object> params) throws ConcurrentOperationException,
InsufficientCapacityException {
final long dcId = dest.getDataCenter().getId();
// lock guest network
final Long guestNetworkId = guestNetwork.getId();
guestNetwork = _networkDao.acquireInLockTable(guestNetworkId);
if (guestNetwork == null) {
throw new ConcurrentOperationException("Unable to acquire network lock: " + guestNetworkId);
}
try {
if (_networkModel.isNetworkSystem(guestNetwork) || guestNetwork.getGuestType() == Network.GuestType.Shared) {
owner = _accountService.getSystemAccount();
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("Starting a ELB vm for network configurations: " + guestNetwork + " in " + dest);
}
assert guestNetwork.getState() == Network.State.Implemented || guestNetwork.getState() == Network.State.Setup || guestNetwork.getState() == Network.State.Implementing : "Network is not yet fully implemented: "
+ guestNetwork;
DataCenterDeployment plan = null;
DomainRouterVO elbVm = null;
plan = new DataCenterDeployment(dcId, dest.getPod().getId(), null, null, null, null);
if (elbVm == null) {
final long id = _routerDao.getNextInSequence(Long.class, "id");
if (s_logger.isDebugEnabled()) {
s_logger.debug("Creating the ELB vm " + id);
}
final List<? extends NetworkOffering> offerings = _networkModel.getSystemAccountNetworkOfferings(NetworkOffering.SystemControlNetwork);
final NetworkOffering controlOffering = offerings.get(0);
final Network controlConfig = _networkMgr.setupNetwork(_systemAcct, controlOffering, plan, null, null, false).get(0);
final LinkedHashMap<Network, List<? extends NicProfile>> networks = new LinkedHashMap<Network, List<? extends NicProfile>>(2);
final NicProfile guestNic = new NicProfile();
guestNic.setDefaultNic(true);
networks.put(controlConfig, new ArrayList<NicProfile>());
networks.put(guestNetwork, new ArrayList<NicProfile>(Arrays.asList(guestNic)));
final VMTemplateVO template = _templateDao.findSystemVMTemplate(dcId);
final String typeString = "ElasticLoadBalancerVm";
final Long physicalNetworkId = _networkModel.getPhysicalNetworkId(guestNetwork);
final PhysicalNetworkServiceProvider provider = _physicalProviderDao.findByServiceProvider(physicalNetworkId, typeString);
if (provider == null) {
throw new CloudRuntimeException("Cannot find service provider " + typeString + " in physical network " + physicalNetworkId);
}
final VirtualRouterProvider vrProvider = _vrProviderDao.findByNspIdAndType(provider.getId(), Type.ElasticLoadBalancerVm);
if (vrProvider == null) {
throw new CloudRuntimeException("Cannot find virtual router provider " + typeString + " as service provider " + provider.getId());
}
long userId = CallContext.current().getCallingUserId();
if (CallContext.current().getCallingAccount().getId() != owner.getId()) {
List<UserVO> userVOs = _userDao.listByAccount(owner.getAccountId());
if (!userVOs.isEmpty()) {
userId = userVOs.get(0).getId();
}
}
ServiceOfferingVO elasticLbVmOffering = _serviceOfferingDao.findDefaultSystemOffering(ServiceOffering.elbVmDefaultOffUniqueName, ConfigurationManagerImpl.SystemVMUseLocalStorage.valueIn(dest.getDataCenter().getId()));
elbVm = new DomainRouterVO(id, elasticLbVmOffering.getId(), vrProvider.getId(), VirtualMachineName.getSystemVmName(id, _instance, ELB_VM_NAME_PREFIX),
template.getId(), template.getHypervisorType(), template.getGuestOSId(), owner.getDomainId(), owner.getId(), userId, false, RedundantState.UNKNOWN,
elasticLbVmOffering.getOfferHA(), false, null);
elbVm.setRole(Role.LB);
elbVm = _routerDao.persist(elbVm);
_itMgr.allocate(elbVm.getInstanceName(), template, elasticLbVmOffering, networks, plan, null);
elbVm = _routerDao.findById(elbVm.getId());
//TODO: create usage stats
}
final State state = elbVm.getState();
if (state != State.Running) {
elbVm = start(elbVm, params);
}
return elbVm;
} finally {
_networkDao.releaseFromLockTable(guestNetworkId);
}
}
private void releaseIp(final long ipId, final long userId, final Account caller) {
s_logger.info("ELB: Release public IP for loadbalancing " + ipId);
final IPAddressVO ipvo = _ipAddressDao.findById(ipId);
ipvo.setAssociatedWithNetworkId(null);
_ipAddressDao.update(ipvo.getId(), ipvo);
_ipAddrMgr.disassociatePublicIpAddress(ipId, userId, caller);
_ipAddressDao.unassignIpAddress(ipId);
}
protected Long getPodIdForDirectIp(final IPAddressVO ipAddr) {
final PodVlanMapVO podVlanMaps = _podVlanMapDao.listPodVlanMapsByVlan(ipAddr.getVlanId());
if (podVlanMaps == null) {
return null;
} else {
return podVlanMaps.getPodId();
}
}
private LoadBalancer handleCreateLoadBalancerRuleWithLock(final CreateLoadBalancerRuleCmd lb, final Account account, final long networkId) throws InsufficientAddressCapacityException,
NetworkRuleConflictException {
Long ipId = null;
boolean newIp = false;
List<LoadBalancerVO> existingLbs = findExistingLoadBalancers(lb.getName(), lb.getSourceIpAddressId(), lb.getAccountId(), lb.getDomainId(), lb.getSourcePortStart());
if (existingLbs == null) {
existingLbs = findExistingLoadBalancers(lb.getName(), lb.getSourceIpAddressId(), lb.getAccountId(), lb.getDomainId(), null);
if (existingLbs == null) {
if (lb.getSourceIpAddressId() != null) {
throwExceptionIfSuppliedlLbNameIsNotAssociatedWithIpAddress(lb);
} else {
s_logger.debug("Could not find any existing frontend ips for this account for this LB rule, acquiring a new frontent IP for ELB");
final PublicIp ip = allocDirectIp(account, networkId);
ipId = ip.getId();
newIp = true;
}
} else {
ipId = existingLbs.get(0).getSourceIpAddressId();
s_logger.debug("ELB: Found existing frontend ip for this account for this LB rule " + ipId);
}
} else {
s_logger.warn("ELB: Found existing load balancers matching requested new LB");
throw new NetworkRuleConflictException("ELB: Found existing load balancers matching requested new LB");
}
final IPAddressVO ipAddr = _ipAddressDao.findById(ipId);
LoadBalancer result = null;
try {
lb.setSourceIpAddressId(ipId);
result = _lbMgr.createPublicLoadBalancer(lb.getXid(), lb.getName(), lb.getDescription(), lb.getSourcePortStart(), lb.getDefaultPortStart(), ipId.longValue(),
lb.getProtocol(), lb.getAlgorithm(), false, CallContext.current(), lb.getLbProtocol(), true);
} catch (final NetworkRuleConflictException e) {
s_logger.warn("Failed to create LB rule, not continuing with ELB deployment");
if (newIp) {
releaseIp(ipId, CallContext.current().getCallingUserId(), account);
}
throw e;
}
DomainRouterVO elbVm = null;
if (existingLbs == null) {
elbVm = findElbVmWithCapacity(ipAddr);
if (elbVm == null) {
elbVm = deployLoadBalancerVM(networkId, ipAddr);
if (elbVm == null) {
final Network network = _networkModel.getNetwork(networkId);
s_logger.warn("Failed to deploy a new ELB vm for ip " + ipAddr + " in network " + network + "lb name=" + lb.getName());
if (newIp) {
releaseIp(ipId, CallContext.current().getCallingUserId(), account);
}
}
}
} else {
final ElasticLbVmMapVO elbVmMap = _elbVmMapDao.findOneByIp(ipId);
if (elbVmMap != null) {
elbVm = _routerDao.findById(elbVmMap.getElbVmId());
}
}
if (elbVm == null) {
s_logger.warn("No ELB VM can be found or deployed");
s_logger.warn("Deleting LB since we failed to deploy ELB VM");
_lbDao.remove(result.getId());
return null;
}
final ElasticLbVmMapVO mapping = new ElasticLbVmMapVO(ipId, elbVm.getId(), result.getId());
_elbVmMapDao.persist(mapping);
return result;
}
private void throwExceptionIfSuppliedlLbNameIsNotAssociatedWithIpAddress(final CreateLoadBalancerRuleCmd lb) {
final List<LoadBalancerVO> existingLbs = findExistingLoadBalancers(lb.getName(), null, lb.getAccountId(), lb.getDomainId(), null);
if (existingLbs != null) {
throw new InvalidParameterValueException("Supplied LB name " + lb.getName() + " is not associated with IP " + lb.getSourceIpAddressId());
}
}
protected List<LoadBalancerVO> findExistingLoadBalancers(final String lbName, final Long ipId, final Long accountId, final Long domainId, final Integer publicPort) {
final SearchBuilder<LoadBalancerVO> sb = _lbDao.createSearchBuilder();
sb.and("name", sb.entity().getName(), SearchCriteria.Op.EQ);
sb.and("accountId", sb.entity().getAccountId(), SearchCriteria.Op.EQ);
sb.and("publicPort", sb.entity().getSourcePortStart(), SearchCriteria.Op.EQ);
if (ipId != null) {
sb.and("sourceIpAddress", sb.entity().getSourceIpAddressId(), SearchCriteria.Op.EQ);
}
if (domainId != null) {
sb.and("domainId", sb.entity().getDomainId(), SearchCriteria.Op.EQ);
}
if (publicPort != null) {
sb.and("publicPort", sb.entity().getSourcePortStart(), SearchCriteria.Op.EQ);
}
final SearchCriteria<LoadBalancerVO> sc = sb.create();
sc.setParameters("name", lbName);
sc.setParameters("accountId", accountId);
if (ipId != null) {
sc.setParameters("sourceIpAddress", ipId);
}
if (domainId != null) {
sc.setParameters("domainId", domainId);
}
if (publicPort != null) {
sc.setParameters("publicPort", publicPort);
}
final List<LoadBalancerVO> lbs = _lbDao.search(sc, null);
return lbs == null || lbs.size() == 0 ? null : lbs;
}
@DB
private PublicIp allocDirectIp(final Account account, final long guestNetworkId) throws InsufficientAddressCapacityException {
return Transaction.execute(new TransactionCallbackWithException<PublicIp, InsufficientAddressCapacityException>() {
@Override
public PublicIp doInTransaction(final TransactionStatus status) throws InsufficientAddressCapacityException {
final Network frontEndNetwork = _networkModel.getNetwork(guestNetworkId);
final PublicIp ip = _ipAddrMgr.assignPublicIpAddress(frontEndNetwork.getDataCenterId(), null, account, VlanType.DirectAttached, frontEndNetwork.getId(), null, true);
final IPAddressVO ipvo = _ipAddressDao.findById(ip.getId());
ipvo.setAssociatedWithNetworkId(frontEndNetwork.getId());
_ipAddressDao.update(ipvo.getId(), ipvo);
s_logger.info("Acquired frontend IP for ELB " + ip);
return ip;
}
});
}
protected DomainRouterVO findElbVmWithCapacity(final IPAddressVO ipAddr) {
final List<DomainRouterVO> unusedElbVms = _elbVmMapDao.listUnusedElbVms();
if (unusedElbVms.size() > 0) {
final List<DomainRouterVO> candidateVms = new ArrayList<DomainRouterVO>();
for (final DomainRouterVO candidateVm : unusedElbVms) {
addCandidateVmIsPodIpMatches(candidateVm, getPodIdForDirectIp(ipAddr), candidateVms);
}
return candidateVms.size() == 0 ? null : candidateVms.get(new Random().nextInt(candidateVms.size()));
}
return null;
}
protected static void addCandidateVmIsPodIpMatches(final DomainRouterVO candidateVm, final Long podIdForDirectIp, final List<DomainRouterVO> candidateVms) {
if (candidateVm.getPodIdToDeployIn().equals(podIdForDirectIp)) {
candidateVms.add(candidateVm);
}
}
protected DomainRouterVO start(final DomainRouterVO elbVm, final Map<Param, Object> params) throws ConcurrentOperationException {
s_logger.debug("Starting ELB VM " + elbVm);
_itMgr.start(elbVm.getUuid(), params);
return _routerDao.findById(elbVm.getId());
}
}