Change vmsnapshot.max configuration to be dynamic

engine/components-api/src/main/java/com/cloud/vm/snapshot/VMSnapshotManager.java

@@ -31,7 +31,7 @@ public interface VMSnapshotManager extends VMSnapshotService, Manager {
     static final ConfigKey<Integer> VMSnapshotExpireInterval = new ConfigKey<Integer>("Advanced", Integer.class, "vmsnapshot.expire.interval", "-1",
             "VM Snapshot expire interval in hours", true, ConfigKey.Scope.Account);
 
-    public static final int VMSNAPSHOTMAX = 10;
+    ConfigKey<Integer> VMSnapshotMax = new ConfigKey<Integer>("Advanced", Integer.class, "vmsnapshot.max", "10", "Maximum vm snapshots for a single vm", true, ConfigKey.Scope.Global);
 
     /**
      * Delete all VM snapshots belonging to one VM

server/src/main/java/com/cloud/configuration/Config.java

@@ -1740,7 +1740,6 @@ public enum Config {
                     null),
 
     // VMSnapshots
-    VMSnapshotMax("Advanced", VMSnapshotManager.class, Integer.class, "vmsnapshot.max", "10", "Maximum vm snapshots for a vm", null),
     VMSnapshotCreateWait("Advanced", VMSnapshotManager.class, Integer.class, "vmsnapshot.create.wait", "1800", "In second, timeout for create vm snapshot", null),
 
     CloudDnsName("Advanced", ManagementServer.class, String.class, "cloud.dns.name", null, "DNS name of the cloud for the GSLB service", null),

server/src/main/java/com/cloud/vm/snapshot/VMSnapshotManagerImpl.java

@@ -174,7 +174,6 @@ public class VMSnapshotManagerImpl extends MutualExclusiveIdsManagerBase impleme
 
     VmWorkJobHandlerProxy _jobHandlerProxy = new VmWorkJobHandlerProxy(this);
 
-    int _vmSnapshotMax;
     int _wait;
 
     static final ConfigKey<Long> VmJobCheckInterval = new ConfigKey<Long>("Advanced",
@@ -188,8 +187,6 @@ public boolean configure(String name, Map<String, Object> params) throws Configu
             throw new ConfigurationException("Unable to get the configuration dao.");
         }
 
-        _vmSnapshotMax = NumbersUtil.parseInt(_configDao.getValue("vmsnapshot.max"), VMSNAPSHOTMAX);
-
         String value = _configDao.getValue("vmsnapshot.create.wait");
         _wait = NumbersUtil.parseInt(value, 1800);
 
@@ -398,8 +395,10 @@ public VMSnapshot allocVMSnapshot(Long vmId, String vsDisplayName, String vsDesc
         _accountMgr.checkAccess(caller, null, true, userVmVo);
 
         // check max snapshot limit for per VM
-        if (_vmSnapshotDao.findByVm(vmId).size() >= _vmSnapshotMax) {
-            throw new CloudRuntimeException("Creating vm snapshot failed due to a VM can just have : " + _vmSnapshotMax + " VM snapshots. Please delete old ones");
+        int vmSnapshotMax = VMSnapshotManager.VMSnapshotMax.value();
+
+        if (_vmSnapshotDao.findByVm(vmId).size() >= vmSnapshotMax) {
+            throw new CloudRuntimeException("Creating vm snapshot failed due to a VM can just have : " + vmSnapshotMax + " VM snapshots. Please delete old ones");
         }
 
         // check if there are active volume snapshots tasks
@@ -1391,6 +1390,6 @@ public String getConfigComponentName() {
 
     @Override
     public ConfigKey<?>[] getConfigKeys() {
-        return new ConfigKey<?>[] {VMSnapshotExpireInterval};
+        return new ConfigKey<?>[] {VMSnapshotExpireInterval, VMSnapshotMax};
     }
 }

server/src/test/java/com/cloud/vm/snapshot/VMSnapshotManagerTest.java

@@ -136,7 +136,6 @@ public class VMSnapshotManagerTest {
     VMSnapshotDetailsDao _vmSnapshotDetailsDao;
     @Mock
     UserVmManager _userVmManager;
-    int _vmSnapshotMax = 10;
 
     private static final long TEST_VM_ID = 3L;
     private static final long SERVICE_OFFERING_ID = 1L;
@@ -194,8 +193,6 @@ public void setup() {
 
         doNothing().when(_accountMgr).checkAccess(any(Account.class), any(AccessType.class), any(Boolean.class), any(ControlledEntity.class));
 
-        _vmSnapshotMgr._vmSnapshotMax = _vmSnapshotMax;
-
         _vmSnapshotMgr._serviceOfferingDao = _serviceOfferingDao;
         _vmSnapshotMgr._userVmDetailsDao = _userVmDetailsDao;
         _vmSnapshotMgr._vmSnapshotDetailsDao = _vmSnapshotDetailsDao;