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CLOUDSTACK-9607: Preventing template deletion when template is in use (#1773)

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Consider this scenario:
1. User launches a VM from Template and keep it running
2. Admin logins and deleted that template [CloudPlatform does not check existing / running VM etc. while the deletion is done]
3. User resets the VM
4. CloudPlatform fails to star the VM as it cannot find the corresponding template.

It throws error as 
java.lang.RuntimeException: Job failed due to exception Resource [Host:11] is unreachable: Host 11: Unable to start instance due to can't find ready template: 209 for data center 1
at com.cloud.vm.VmWorkJobDispatcher.runJob(VmWorkJobDispatcher.java:113)
at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:495)

Client is requesting better handing of this scenario. We need to check existing / running VM's when the template is deleted and warn admin about the possible issue that may occur.

REPRO STEPS
==================
1. Launches a VM from Template and keep it running
2. Now delete that template 
3. Reset the VM
4. CloudPlatform fails to star the VM as it cannot find the corresponding template.

EXPECTED BEHAVIOR
==================
Cloud platform should throw some warning message while the template is deleted if that template is being used by existing / running VM's

ACTUAL BEHAVIOR
==================
Cloud platform does not throw as waring etc.
This commit is contained in:
Mowgli 2018-01-04 10:59:39 +05:30 committed by Rohit Yadav
parent 9988c269b2
commit 25b63f5e73
6 changed files with 117 additions and 8 deletions
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6
api/src/org/apache/cloudstack/api/command/user/template/DeleteTemplateCmd.java Normal file → Executable file
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@ -52,6 +52,9 @@ public class DeleteTemplateCmd extends BaseAsyncCmd {
@Parameter(name = ApiConstants.ZONE_ID, type = CommandType.UUID, entityType = ZoneResponse.class, description = "the ID of zone of the template")
private Long zoneId;
@Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force delete a template.", since = "4.9+")
private Boolean forced;
/////////////////////////////////////////////////////
/////////////////// Accessors ///////////////////////
/////////////////////////////////////////////////////
@ -64,6 +67,9 @@ public class DeleteTemplateCmd extends BaseAsyncCmd {
return zoneId;
}
public boolean isForced() {
return (forced != null) ? forced : true;
}
/////////////////////////////////////////////////////
/////////////// API Implementation///////////////////
/////////////////////////////////////////////////////

8
engine/schema/src/com/cloud/vm/dao/VMInstanceDao.java Normal file → Executable file
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@ -53,6 +53,14 @@ public interface VMInstanceDao extends GenericDao<VMInstanceVO, Long>, StateDao<
*/
List<VMInstanceVO> listByPodId(long podId);
/**
* Lists non-expunged VMs by templateId
* @param templateId
* @return list of VMInstanceVO deployed from the specified template, that are not expunged
*/
public List<VMInstanceVO> listNonExpungedByTemplate(long templateId);
/**
* Lists non-expunged VMs by zone ID and templateId
* @param zoneId

16
engine/schema/src/com/cloud/vm/dao/VMInstanceDaoImpl.java Normal file → Executable file
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@ -72,6 +72,7 @@ public class VMInstanceDaoImpl extends GenericDaoBase<VMInstanceVO, Long> implem
protected SearchBuilder<VMInstanceVO> IdStatesSearch;
protected SearchBuilder<VMInstanceVO> AllFieldsSearch;
protected SearchBuilder<VMInstanceVO> ZoneTemplateNonExpungedSearch;
protected SearchBuilder<VMInstanceVO> TemplateNonExpungedSearch;
protected SearchBuilder<VMInstanceVO> NameLikeSearch;
protected SearchBuilder<VMInstanceVO> StateChangeSearch;
protected SearchBuilder<VMInstanceVO> TransitionSearch;
@ -165,6 +166,12 @@ public class VMInstanceDaoImpl extends GenericDaoBase<VMInstanceVO, Long> implem
ZoneTemplateNonExpungedSearch.and("state", ZoneTemplateNonExpungedSearch.entity().getState(), Op.NEQ);
ZoneTemplateNonExpungedSearch.done();
TemplateNonExpungedSearch = createSearchBuilder();
TemplateNonExpungedSearch.and("template", TemplateNonExpungedSearch.entity().getTemplateId(), Op.EQ);
TemplateNonExpungedSearch.and("state", TemplateNonExpungedSearch.entity().getState(), Op.NEQ);
TemplateNonExpungedSearch.done();
NameLikeSearch = createSearchBuilder();
NameLikeSearch.and("name", NameLikeSearch.entity().getHostName(), Op.LIKE);
NameLikeSearch.done();
@ -334,6 +341,15 @@ public class VMInstanceDaoImpl extends GenericDaoBase<VMInstanceVO, Long> implem
return listBy(sc);
}
@Override
public List<VMInstanceVO> listNonExpungedByTemplate(long templateId) {
SearchCriteria<VMInstanceVO> sc = TemplateNonExpungedSearch.create();
sc.setParameters("template", templateId);
sc.setParameters("state", State.Expunging);
return listBy(sc);
}
@Override
public List<VMInstanceVO> listNonExpungedByZoneAndTemplate(long zoneId, long templateId) {
SearchCriteria<VMInstanceVO> sc = ZoneTemplateNonExpungedSearch.create();

14
server/src/com/cloud/template/TemplateManagerImpl.java Normal file → Executable file
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@ -38,6 +38,7 @@ import com.cloud.utils.EncryptionUtil;
import com.cloud.utils.DateUtil;
import com.cloud.utils.Pair;
import com.cloud.utils.EnumUtils;
import com.google.common.base.Joiner;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
@ -1235,6 +1236,19 @@ public class TemplateManagerImpl extends ManagerBase implements TemplateManager,
throw new InvalidParameterValueException("unable to find template with id " + templateId);
}
List<VMInstanceVO> vmInstanceVOList;
if(cmd.getZoneId() != null) {
vmInstanceVOList = _vmInstanceDao.listNonExpungedByZoneAndTemplate(cmd.getZoneId(), templateId);
}
else {
vmInstanceVOList = _vmInstanceDao.listNonExpungedByTemplate(templateId);
}
if(!cmd.isForced() && CollectionUtils.isNotEmpty(vmInstanceVOList)) {
final String message = String.format("Unable to delete template with id: %1$s because VM instances: [%2$s] are using it.", templateId, Joiner.on(",").join(vmInstanceVOList));
s_logger.warn(message);
throw new InvalidParameterValueException(message);
}
_accountMgr.checkAccess(caller, AccessType.OperateEntry, true, template);
if (template.getFormat() == ImageFormat.ISO) {

55
server/test/com/cloud/template/TemplateManagerImplTest.java Normal file → Executable file
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@ -30,6 +30,8 @@ import com.cloud.exception.ResourceAllocationException;
import com.cloud.host.Status;
import com.cloud.host.dao.HostDao;
import com.cloud.hypervisor.Hypervisor;
import com.cloud.storage.Storage;
import com.cloud.storage.TemplateProfile;
import com.cloud.projects.ProjectManager;
import com.cloud.storage.GuestOSVO;
import com.cloud.storage.Snapshot;
@ -59,9 +61,11 @@ import com.cloud.user.dao.AccountDao;
import com.cloud.utils.component.ComponentContext;
import com.cloud.utils.concurrency.NamedThreadFactory;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.VMInstanceVO;
import com.cloud.vm.dao.UserVmDao;
import com.cloud.vm.dao.VMInstanceDao;
import org.apache.cloudstack.api.command.user.template.CreateTemplateCmd;
import org.apache.cloudstack.api.command.user.template.DeleteTemplateCmd;
import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.engine.orchestration.service.VolumeOrchestrationService;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager;
@ -169,6 +173,13 @@ public class TemplateManagerImplTest {
@Inject
StorageStrategyFactory storageStrategyFactory;
@Inject
VMInstanceDao _vmInstanceDao;
@Inject
private VMTemplateDao _tmpltDao;
public class CustomThreadPoolExecutor extends ThreadPoolExecutor {
AtomicInteger ai = new AtomicInteger(0);
public CustomThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit,
@ -216,6 +227,50 @@ public class TemplateManagerImplTest {
templateManager.verifyTemplateId(1L);
}
@Test
public void testForceDeleteTemplate() {
//In this Unit test all the conditions related to "force template delete flag" are tested.
DeleteTemplateCmd cmd = mock(DeleteTemplateCmd.class);
VMTemplateVO template = mock(VMTemplateVO.class);
TemplateAdapter templateAdapter = mock(TemplateAdapter.class);
TemplateProfile templateProfile = mock(TemplateProfile.class);
List<VMInstanceVO> vmInstanceVOList = new ArrayList<VMInstanceVO>();
List<TemplateAdapter> adapters = new ArrayList<TemplateAdapter>();
adapters.add(templateAdapter);
when(cmd.getId()).thenReturn(0L);
when(_tmpltDao.findById(cmd.getId())).thenReturn(template);
when(cmd.getZoneId()).thenReturn(null);
when(template.getHypervisorType()).thenReturn(Hypervisor.HypervisorType.None);
when(template.getFormat()).thenReturn(Storage.ImageFormat.VMDK);
templateManager.setTemplateAdapters(adapters);
when(templateAdapter.getName()).thenReturn(TemplateAdapter.TemplateAdapterType.Hypervisor.getName().toString());
when(templateAdapter.prepareDelete(any(DeleteTemplateCmd.class))).thenReturn(templateProfile);
when(templateAdapter.delete(templateProfile)).thenReturn(true);
//case 1: When Force delete flag is 'true' but VM instance VO list is empty.
when(cmd.isForced()).thenReturn(true);
templateManager.deleteTemplate(cmd);
//case 2.1: When Force delete flag is 'false' and VM instance VO list is empty.
when(cmd.isForced()).thenReturn(false);
templateManager.deleteTemplate(cmd);
//case 2.2: When Force delete flag is 'false' and VM instance VO list is non empty.
when(cmd.isForced()).thenReturn(false);
VMInstanceVO vmInstanceVO = mock(VMInstanceVO.class);
when(vmInstanceVO.getInstanceName()).thenReturn("mydDummyVM");
vmInstanceVOList.add(vmInstanceVO);
when(_vmInstanceDao.listNonExpungedByTemplate(anyLong())).thenReturn(vmInstanceVOList);
try {
templateManager.deleteTemplate(cmd);
} catch(Exception e) {
assertTrue("Invalid Parameter Value Exception is expected", (e instanceof InvalidParameterValueException));
}
}
@Test
public void testPrepareTemplateIsSeeded() {
VMTemplateVO mockTemplate = mock(VMTemplateVO.class);

16
ui/scripts/templates.js
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@ -1538,14 +1538,24 @@
actions: {
remove: {
label: 'label.action.delete.template',
messages: {
confirm: function(args) {
createForm: {
title: 'label.action.delete.template',
desc: function(args) {
if(args.context.templates[0].crossZones == true) {
return 'message.action.delete.template.for.all.zones';
} else {
return 'message.action.delete.template';
}
},
fields: {
forced: {
label: 'force.delete',
isBoolean: true,
isChecked: false
}
}
},
messages: {
notification: function(args) {
return 'label.action.delete.template';
}
@ -1556,7 +1566,7 @@
queryParams += "&zoneid=" + args.context.zones[0].zoneid;
}
$.ajax({
url: createURL(queryParams),
url: createURL(queryParams + "&forced=" + (args.data.forced == "on")),
dataType: "json",
async: true,
success: function(json) {