@DB
protected boolean applyLoadBalancerRules(List<LoadBalancerVO> lbs)
throws ResourceUnavailableException {
Transaction txn = Transaction.currentTxn();
List<LoadBalancingRule> rules = new ArrayList<LoadBalancingRule>();
for (LoadBalancerVO lb : lbs) {
List<LbDestination> dstList = getExistingDestinations(lb.getId());
LoadBalancingRule loadBalancing = new LoadBalancingRule(lb, dstList);
rules.add(loadBalancing);
}
if (!_networkMgr.applyRules(rules, false)) {
s_logger.debug("LB rules are not completely applied");
return false;
}
for (LoadBalancerVO lb : lbs) {
txn.start();
if (lb.getState() == FirewallRule.State.Revoke) {
_lbDao.remove(lb.getId());
s_logger.warn("LB " + lb.getId() + " is successfully removed");
} else if (lb.getState() == FirewallRule.State.Add) {
lb.setState(FirewallRule.State.Active);
s_logger.warn("LB rule " + lb.getId() + " state is set to Active");
_lbDao.persist(lb);
}
// remove LB-Vm mappings that were state to revoke
List<LoadBalancerVMMapVO> lbVmMaps = _lb2VmMapDao.listByLoadBalancerId(lb.getId(), true);
List<Long> instanceIds = new ArrayList<Long>();
for (LoadBalancerVMMapVO lbVmMap : lbVmMaps) {
instanceIds.add(lbVmMap.getInstanceId());
}
if (!instanceIds.isEmpty()) {
_lb2VmMapDao.remove(lb.getId(), instanceIds, null);
s_logger.debug(
"Load balancer rule id " + lb.getId() + " is removed for vms " + instanceIds);
}
if (_lb2VmMapDao.listByLoadBalancerId(lb.getId()).isEmpty()) {
lb.setState(FirewallRule.State.Add);
_lbDao.persist(lb);
s_logger.debug(
"LB rule "
+ lb.getId()
+ " state is set to Add as there are no more active LB-VM mappings");
}
txn.commit();
}
return true;
}
@Override
public List<UserVmVO> listLoadBalancerInstances(ListLoadBalancerRuleInstancesCmd cmd)
throws PermissionDeniedException {
Account caller = UserContext.current().getCaller();
Long loadBalancerId = cmd.getId();
Boolean applied = cmd.isApplied();
if (applied == null) {
applied = Boolean.TRUE;
}
LoadBalancerVO loadBalancer = _lbDao.findById(loadBalancerId);
if (loadBalancer == null) {
return null;
}
_accountMgr.checkAccess(caller, null, loadBalancer);
List<UserVmVO> loadBalancerInstances = new ArrayList<UserVmVO>();
List<LoadBalancerVMMapVO> vmLoadBalancerMappings = null;
vmLoadBalancerMappings = _lb2VmMapDao.listByLoadBalancerId(loadBalancerId);
List<Long> appliedInstanceIdList = new ArrayList<Long>();
if ((vmLoadBalancerMappings != null) && !vmLoadBalancerMappings.isEmpty()) {
for (LoadBalancerVMMapVO vmLoadBalancerMapping : vmLoadBalancerMappings) {
appliedInstanceIdList.add(vmLoadBalancerMapping.getInstanceId());
}
}
IPAddressVO addr = _ipAddressDao.findById(loadBalancer.getSourceIpAddressId());
List<UserVmVO> userVms =
_vmDao.listVirtualNetworkInstancesByAcctAndZone(
loadBalancer.getAccountId(), addr.getDataCenterId(), loadBalancer.getNetworkId());
for (UserVmVO userVm : userVms) {
// if the VM is destroyed, being expunged, in an error state, or in an unknown state, skip it
switch (userVm.getState()) {
case Destroyed:
case Expunging:
case Error:
case Unknown:
continue;
}
boolean isApplied = appliedInstanceIdList.contains(userVm.getId());
if ((isApplied && applied) || (!isApplied && !applied)) {
loadBalancerInstances.add(userVm);
}
}
return loadBalancerInstances;
}
@Override
public List<LbDestination> getExistingDestinations(long lbId) {
List<LbDestination> dstList = new ArrayList<LbDestination>();
List<LoadBalancerVMMapVO> lbVmMaps = _lb2VmMapDao.listByLoadBalancerId(lbId);
LoadBalancerVO lb = _lbDao.findById(lbId);
String dstIp = null;
for (LoadBalancerVMMapVO lbVmMap : lbVmMaps) {
UserVm vm = _vmDao.findById(lbVmMap.getInstanceId());
Nic nic = _nicDao.findByInstanceIdAndNetworkIdIncludingRemoved(lb.getNetworkId(), vm.getId());
dstIp = nic.getIp4Address();
LbDestination lbDst =
new LbDestination(
lb.getDefaultPortStart(), lb.getDefaultPortEnd(), dstIp, lbVmMap.isRevoke());
dstList.add(lbDst);
}
return dstList;
}
private boolean removeFromLoadBalancerInternal(long loadBalancerId, List<Long> instanceIds) {
UserContext caller = UserContext.current();
LoadBalancerVO loadBalancer = _lbDao.findById(Long.valueOf(loadBalancerId));
if (loadBalancer == null) {
throw new InvalidParameterException("Invalid load balancer value: " + loadBalancerId);
}
_accountMgr.checkAccess(caller.getCaller(), null, loadBalancer);
try {
loadBalancer.setState(FirewallRule.State.Add);
_lbDao.persist(loadBalancer);
for (long instanceId : instanceIds) {
LoadBalancerVMMapVO map =
_lb2VmMapDao.findByLoadBalancerIdAndVmId(loadBalancerId, instanceId);
map.setRevoke(true);
_lb2VmMapDao.persist(map);
s_logger.debug(
"Set load balancer rule for revoke: rule id "
+ loadBalancerId
+ ", vmId "
+ instanceId);
}
if (!applyLoadBalancerConfig(loadBalancerId)) {
s_logger.warn(
"Failed to remove load balancer rule id " + loadBalancerId + " for vms " + instanceIds);
throw new CloudRuntimeException(
"Failed to remove load balancer rule id " + loadBalancerId + " for vms " + instanceIds);
}
} catch (ResourceUnavailableException e) {
s_logger.warn("Unable to apply the load balancer config because resource is unavaliable.", e);
return false;
}
return true;
}
@Override
public boolean removeVmFromLoadBalancers(long instanceId) {
boolean success = true;
List<LoadBalancerVMMapVO> maps = _lb2VmMapDao.listByInstanceId(instanceId);
if (maps == null || maps.isEmpty()) {
return true;
}
Map<Long, List<Long>> lbsToReconfigure = new HashMap<Long, List<Long>>();
// first set all existing lb mappings with Revoke state
for (LoadBalancerVMMapVO map : maps) {
long lbId = map.getLoadBalancerId();
List<Long> instances = lbsToReconfigure.get(lbId);
if (instances == null) {
instances = new ArrayList<Long>();
}
instances.add(map.getInstanceId());
lbsToReconfigure.put(lbId, instances);
map.setRevoke(true);
_lb2VmMapDao.persist(map);
s_logger.debug(
"Set load balancer rule for revoke: rule id "
+ map.getLoadBalancerId()
+ ", vmId "
+ instanceId);
}
// Reapply all lbs that had the vm assigned
if (lbsToReconfigure != null) {
for (Map.Entry<Long, List<Long>> lb : lbsToReconfigure.entrySet()) {
if (!removeFromLoadBalancerInternal(lb.getKey(), lb.getValue())) {
success = false;
}
}
}
return success;
}
@DB
public boolean deleteLoadBalancerRule(
long loadBalancerId, boolean apply, Account caller, long callerUserId) {
LoadBalancerVO lb = _lbDao.findById(loadBalancerId);
Transaction txn = Transaction.currentTxn();
boolean generateUsageEvent = false;
boolean success = true;
txn.start();
if (lb.getState() == FirewallRule.State.Staged) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Found a rule that is still in stage state so just removing it: " + lb);
}
generateUsageEvent = true;
} else if (lb.getState() == FirewallRule.State.Add
|| lb.getState() == FirewallRule.State.Active) {
lb.setState(FirewallRule.State.Revoke);
_lbDao.persist(lb);
generateUsageEvent = true;
}
List<LoadBalancerVMMapVO> maps = _lb2VmMapDao.listByLoadBalancerId(loadBalancerId);
if (maps != null) {
for (LoadBalancerVMMapVO map : maps) {
map.setRevoke(true);
_lb2VmMapDao.persist(map);
s_logger.debug(
"Set load balancer rule for revoke: rule id "
+ loadBalancerId
+ ", vmId "
+ map.getInstanceId());
}
}
if (generateUsageEvent) {
// Generate usage event right after all rules were marked for revoke
UsageEventVO usageEvent =
new UsageEventVO(
EventTypes.EVENT_LOAD_BALANCER_DELETE, lb.getAccountId(), 0, lb.getId(), null);
_usageEventDao.persist(usageEvent);
}
txn.commit();
if (apply) {
try {
if (!applyLoadBalancerConfig(loadBalancerId)) {
s_logger.warn("Unable to apply the load balancer config");
return false;
}
} catch (ResourceUnavailableException e) {
s_logger.warn(
"Unable to apply the load balancer config because resource is unavaliable.", e);
return false;
}
}
FirewallRuleVO relatedRule = _firewallDao.findByRelatedId(lb.getId());
if (relatedRule != null) {
s_logger.warn(
"Unable to remove firewall rule id="
+ lb.getId()
+ " as it has related firewall rule id="
+ relatedRule.getId()
+ "; leaving it in Revoke state");
success = false;
} else {
_firewallDao.remove(lb.getId());
}
_elbMgr.handleDeleteLoadBalancerRule(lb, callerUserId, caller);
if (success) {
s_logger.debug("Load balancer with id " + lb.getId() + " is removed successfully");
}
return success;
}
@Override
@DB
@ActionEvent(
eventType = EventTypes.EVENT_ASSIGN_TO_LOAD_BALANCER_RULE,
eventDescription = "assigning to load balancer",
async = true)
public boolean assignToLoadBalancer(long loadBalancerId, List<Long> instanceIds) {
UserContext ctx = UserContext.current();
Account caller = ctx.getCaller();
LoadBalancerVO loadBalancer = _lbDao.findById(loadBalancerId);
if (loadBalancer == null) {
throw new InvalidParameterValueException(
"Failed to assign to load balancer "
+ loadBalancerId
+ ", the load balancer was not found.");
}
List<LoadBalancerVMMapVO> mappedInstances =
_lb2VmMapDao.listByLoadBalancerId(loadBalancerId, false);
Set<Long> mappedInstanceIds = new HashSet<Long>();
for (LoadBalancerVMMapVO mappedInstance : mappedInstances) {
mappedInstanceIds.add(Long.valueOf(mappedInstance.getInstanceId()));
}
List<UserVm> vmsToAdd = new ArrayList<UserVm>();
for (Long instanceId : instanceIds) {
if (mappedInstanceIds.contains(instanceId)) {
throw new InvalidParameterValueException(
"VM " + instanceId + " is already mapped to load balancer.");
}
UserVm vm = _vmDao.findById(instanceId);
if (vm == null || vm.getState() == State.Destroyed || vm.getState() == State.Expunging) {
throw new InvalidParameterValueException("Invalid instance id: " + instanceId);
}
_rulesMgr.checkRuleAndUserVm(loadBalancer, vm, caller);
if (vm.getAccountId() != loadBalancer.getAccountId()) {
throw new PermissionDeniedException(
"Cannot add virtual machines that do not belong to the same owner.");
}
// Let's check to make sure the vm has a nic in the same network as the load balancing rule.
List<? extends Nic> nics = _networkMgr.getNics(vm.getId());
Nic nicInSameNetwork = null;
for (Nic nic : nics) {
if (nic.getNetworkId() == loadBalancer.getNetworkId()) {
nicInSameNetwork = nic;
break;
}
}
if (nicInSameNetwork == null) {
throw new InvalidParameterValueException(
"VM " + instanceId + " cannot be added because it doesn't belong in the same network.");
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("Adding " + vm + " to the load balancer pool");
}
vmsToAdd.add(vm);
}
Transaction txn = Transaction.currentTxn();
txn.start();
for (UserVm vm : vmsToAdd) {
LoadBalancerVMMapVO map = new LoadBalancerVMMapVO(loadBalancer.getId(), vm.getId(), false);
map = _lb2VmMapDao.persist(map);
}
txn.commit();
try {
loadBalancer.setState(FirewallRule.State.Add);
_lbDao.persist(loadBalancer);
applyLoadBalancerConfig(loadBalancerId);
} catch (ResourceUnavailableException e) {
s_logger.warn("Unable to apply the load balancer config because resource is unavaliable.", e);
return false;
}
return true;
}
