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how to remove a node from nlb at runtime?

January 27, 2014, 8:20 am
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hello,

i need to temporally exclude a node from an nlb.

May happen that a server is up and working but the web application i'm balancing is out of sinch with the same application in the others nodes.

Eg. some static variables are not the same of the same static variables of other nodes, because of a timeout, a write error and so on but the server is still working.

in this case i need to stop the server from nlb because the information in the web application is not in sinch with other nodes.

I need to prevent users from being serverd from this out to date server, untill it will became updated, but i need to do this programmatically

how can i do it?


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is it possible to use SQL Server Cluster Disk as a Shared Storage for Load Balanced IIS servers?

February 3, 2014, 12:11 am
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HA Configuration:

Servers: Windows Server 2012 R2

2 node SQL Server FCI Cluster

2 node Web Server Behind a load balancer

is it possible to use cluster disk as a shared storage for IIS Servers?


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Failover Cluster Policy question

February 3, 2014, 10:47 am
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Hello,

I am confuse with the following settings:

1. "If resource fails, attempt to restart on current node" once within 15 mintes ... no problem with this one.

2. "If restart is unsuccessful, fail over all resources in this serviceor application"

What is(are) the all recources in this service or application? Is it also the two drives in dependency?

is it also the file server share?

If YES this mean that the service (TSM) is the Manager of all other resources above, isn't it ?

Thanks,

Dom

System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager

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SAS Cluster Storage 2012 R2

February 3, 2014, 3:10 am
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Hello Everyone,

We are in the design process of building a new 2012 R2 Hyper environment having moved away from VMware.

My planned setup is

  • 2 x HP360 G8 Servers,
  • 1 x HP P2000 SAN,
  • Interdependent switches to mange the Hyper-V management (migration traffic etc.)

I have built a test environment to help me plan our new system, at the moment the storage for the test lab is local on each physical host.

When I build the main system i will be using a HP P2000 with SAS connections to both hosts, am i going about this the right way? 

My thoughts were to setup the P2000 with a ISCI target connected to a large volume, then connect to the target via the initiator on both of my Hyper-V hosts. 

Would this then enable me to create VM's on the shared (Clustered) storage? and allow me to move servers around etc.

Hope this makes sense :)

Thank you all in advance!

Rob

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Custer dependency in Domain

January 22, 2014, 11:52 pm
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Hi,

I have come across a confusing question

One of our customer environment is having only one Windows 2008 Domain Controller in entrire FOrest and Domain. We know that its design problem which need to be corrected on priority. But i got struct in answering some of the questions as

1) If i am running Windows 2008 Failover Cluster for SQL DB, what is the level of dependency on my Domain/Domain Controller.

2) If Single Domain Controller which is there in environment is failed due to hardware or OS problem then Failover Cluster Server will get impacted immediately or it will run some time? If it run some time and fail later then what is the stage it will get failed actually.

Pls suggest if you know any of these points, its good discussion point as well.

Regards:Mahesh

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WWW service is not able to start via Microsoft Failover Cluster generic service resource

February 4, 2014, 7:49 am
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Environment

Cluster Nodes = two

Cluster Nodes OS = Windows 2008R2

Application = IIS

Query

I created generic service resources of many windows services under Microsoft Failover Cluster and they are failing over successfully but when I create a generic service resource for WWW, then the WWW service is not able to online via Microsoft Failover Cluster. It stuck in online pending.

I have noticed two things.

1.) If the WWW service is set to manual and started at passive node and I manually restart the Active node then the WWW service successfully switch over to stand by/passive node. but if the WWW service is set tomanual and not started on stand by/Passive node then the WWW service is not failing over.

2.) if I kill the WWW service manually (as a test case) on Active Node via this command (taskkill /f /pid XXXX) then the WWW service failed and is not failing over to standby/passive node.

Any comment will be appreciated. Thanks. Zahid Haseeb.


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Failed to online the cluster generic script resource

February 3, 2014, 1:09 am
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Environment

Cluster Nodes = two

Cluster Nodes OS = Windows 2012

Application = IIS

Query

I configured the cluster. I want to cluster IIS as failover cluster. For this I am using the following article. As per the direction of the below article I replaced both (SITE_NAME = "MyWebSite" andAPP_POOL_NAME = "DefaultAppPool") . Now when I try to online the generic script resource it failed.

http://support.microsoft.com/kb/970759/en-us

Please Note: When I used the same script mentioned in the above link with default web site, it works fine.

Any comment will be appreciated. Thanks. Zahid Haseeb.


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msmq private queue is not visible on windows 2008 r2

February 4, 2014, 10:30 am
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Hello

MSMQ privte queue are disappeared from the console. when i try to create a new queue with same name it says that entry is already there.

I am able to see the msmq status on the event viewer ,we use vcs cluster

is it some permission issue and or it configuration mismatch on the vcs cluster

Regards

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Cluster Disk keeps going offline. Service or application failed

February 3, 2014, 5:59 am
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We currently have 2 servers, both housing 3 VMs (6 nodes total).  2 Disk are used to house these VM's.  Cluster Disk 1 keeps going offline, which kicks 2 of our servers offline until we migrate the disk to another node (puts it into redirected mode).  We then have to restart the server to re-establish to connection to the cluster disk.  Digging around in event viewer, I saw the following:

Cluster resource 'Cluster Disk 2' in clustered service or application 'b0a21897-e59b-46c9-a495-273dc5ad2aea' failed.

Cluster physical disk resource 'Cluster Disk 2' cannot be brought online because the associated disk could not be found. The expected signature of the disk was '{92eb716c-6878-42ad-b7de-f3879d72e232}'. If the disk was replaced or restored, in the Failover Cluster Manager snap-in, you can use the Repair function (in the properties sheet for the disk) to repair the new or restored disk. If the disk will not be replaced, delete the associated disk resource.

The Cluster service failed to bring clustered service or application 'b0a21897-e59b-46c9-a495-273dc5ad2aea' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered service or application.

I ran the cluster validation test and all seemed to check out except for Cluster Disk 1 and the two servers associated with this server, as shown below:

    Validating cluster resource Cluster Disk 2.

    This resource is marked with a state of 'Offline'. The functionality that this resource provides is not available while it is in the offline state. The resource may be put in this state by an administrator or program. It may also be a newly created resource which has not been put in the online state or the resource may be dependent on a resource that is not online. Resources can be brought online by choosing the 'Bring this resource online' action in Failover Cluster Manager.

      This resource is marked with a state of 'Failed' instead of 'Online'. This failed state indicates that the resource had a problem either coming online or had a failure while it was online. The event logs and cluster logs may have information that is helpful in identifying the cause of the failure.

All disks are housed on our SAN.  Any idea where I can start troubleshooting further?  Changing the signature of the disk or finding out which application is failing?  All help is greatly appreciated.

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Unable to Validate a Cluster Configuration. The operation has failed. The action validate a configuration did not complete .

November 19, 2013, 12:03 pm
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There is an error in XML document (5, 73).  

Attempt by method

Microsoft.Xml.Serialzation.GeneratedAssembly.XmlSerialzationReaderClusterPrep.Config.Read4_As...Bolean) to access method

MS.Internal.ServerClusters.Validation.TestAssemblyCollection.Add(MS.Internal.ServerClusters.V....Failed

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Introducing Server 2012 R2 into a Server 2008 R2 Hyper-V failover-cluster

February 4, 2014, 5:55 pm
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Hello,

      I have a couple Server 2008 R2 Hyper-V Host clusters with many VM's running on them. Is there a way I can introduce a Server 2012 R2 Hyper-V host server into each cluster, migrate the VM's to the Server 2012 R2 system and then be able to live migrate the VM's to another Server 2012 R2 Hyper-V host in another cluster? Thanks

Pat

Pat

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Failover cluster server - File Server role is clustered - Shadow copies do not seem to travel to other node when failing over

January 24, 2014, 5:06 am
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Hi,

New to 2012 and implementing a clustered environment for our File Services role.  Have got to a point where I have successfully configured the Shadow copy settings.

Have a large (15tb) disk.  S:

Have a VSS drive (volume shadow copy drive) V:

Have successfully configured through Windows Explorer the Shadow copy settings.

Created dependencies in Failcover Cluster Server console whereby S: depends on V:

However, when I failover the resource and browse the Client Access Point share there are no entries under the "Previous Versions" tab. 

When I visit the S: drive in windows explorer and open the Shadow copy dialogue box, there are entries showing the times and dates of the shadow copies ran when on the original node.  So the disk knows about the shadow copies that were ran on the original node but the "previous versions" tab has no entries to display.

This is in a 2012 server (NOT R2 version).

Can anyone explain what might be the reason?  Do I have an "issue" or is this by design?

All help apprecieated!

Kathy

Kathleen Hayhurst Senior IT Support Analyst



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Server 2012 High availability - Load balanced DHCP

October 14, 2012, 3:39 pm
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I have two sever 2012 boxes with DHCP role installed on both. They are set up in a load balancing cluster.

How often do they sync or replicate to each other. I have noticed when I create a reservation on one, or a host gets a IP lease, it doesn't show up for a while on the other dhcp server.

How often to they sync?  Is there a way to configure how often they sync/replicate?

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Cluster network name resource error 1196

January 2, 2014, 12:49 pm
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I have a two-node Hyper-V 2012 Core Server cluster. Initially, the cluster was working fine and I was able to do live migrations with no problem. I first realized that something had gone wrong when I was attempting to move a VM's storage to the Cluster Disk. When I right click on the VM and select Move > Virtual Machine Storage, the bottom left area of the "move storage" screen says "Loading..." forever and never displays the cluster storage. This happened once before and I was able to correct the issue by taking the Server Name resource offline and doing More Actions > Repair. However, if I try a repair now I receive the following error messages:

"There was an error repairing the active directory object for 'Cluster Name'. Error Code: 0x800713b8. The cluster request is not valid for this object". 

I have verified that the cluster name Active Directory object (CCSDCluster) still exists and each node as well as itself has full permissions to the object. What I am not certain of is whether the object is still in the same Organizational Unit as it was originally. After the failed repair attempt, I am able to bring the Server Name resource back online successfully.

In addition, I am continually receiving cluster event errors indicating the following:

"Cluster network name resource 'Cluster Name' failed registration of one or more associated DNS name(s) for the following reason: The handle is invalid. Ensure that the network adapters associated with dependent IP address resources are configured with at least one accessible DNS server." 

Each of the two nodes has multiple NICs configured. One for management, one for guest OSs (Hyper-V virtual switch is configured to use this NIC and not allow management OS access), and two for iSCSI (for redundancy and multi-path). Live migration is set to only use the management NICs. The management NIC on both nodes is configured with valid DNS servers. The CCSDCluster DNS entry has full permissions for both nodes and itself.

Any suggestions on what to try would be greatly appreciated. Thank you!

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Cluster DNS stuatus: The handle is invalid -- server 2012 R2

February 5, 2014, 8:19 pm
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hi,

I cannot add a node, perform a live migration on cluster.

In the properties of cluster DNS status is : the handle is invalid. 

I can ping ipaddress/name of cluster, but there was no host A record created automatically. I had to create it manually.

I changed permission on host record as well, but still no luck.

Can you please help me fix this issue?

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Errors 2050 and 2051 repeated in CSV cluster

February 5, 2014, 8:28 pm
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Good afternoon,

OS on ISCSITarget: Microsoft Windows Server 2012Standard
OS Nodes: Microsoft Hyper-VServer 2012

Problem: These errorsappear repeatedly.

Nombre de registro:    Microsoft-Windows-FailoverClustering/Diagnostic
Origen:                Microsoft-Windows-FailoverClustering
Fecha:                 05-02-2014 11:21:58 p.m.
Id. del evento:        2050
Nivel:                 Advertencia
Usuario:               SYSTEM
Descripción:
[ClRtl] SsCoreShareAdd(): status = 2118 share = CSV$ server = (null)

Nombre de registro:    Microsoft-Windows-FailoverClustering/Diagnostic
Origen:                Microsoft-Windows-FailoverClustering
Fecha:                 05-02-2014 11:21:58 p.m.
Id. del evento:        2051
Categoría de la tarea:    Ninguno
Nivel:                 Error
Usuario:               SYSTEM
Descripción:
mscs::LocalIdentity::Refresh: ERROR_FILE_NOT_FOUND(2)' because of 'Failed to read value 'LastUpdatedOn''

AnyIdea?

Thanks for your help.

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Live Migration fails on windows server 2012 two nodes cluster

February 5, 2014, 11:28 pm
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Hi,

I am having issues as described in mention below KB link.

http://support.microsoft.com/kb/2838043

after applying this hotfix I have restart Nodes now I need to perform post installation task as described in article that's is simulate failure on Cluster Network Name and repair it .

 I am confuse and need  responses on below queries

 

  1. What is the impact on services  running on this cluster like VM's , CSV  after pressing Simulate Failure.
  2. Is this activity required any downtime?
  3. Another question is if Cluster Network Name Resource fails how it effects cluster service?

 

 

 

 

Usama Arif

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Problem with Clustered DFS Namespace

February 6, 2014, 6:17 am
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We have a Microsoft cluster running on 2 Server Enterprise 2008R2 Servers with the FileServices Roles (including DFS roles).  We have 3 Standalone DFS namespaces (roots) which have been up and running for a couple of months.  Users were complaining about performance so we added the DfsDnsConfig registry entry to force the FQDN format in the namespace (KB244380). 

Although it doesn't say to do so in the KB Article, I found several threads that said you also need to delete and recreate the namespaces afterwards.  This is where I got into the problem.

I deleted one of my namespaces from the Failover Cluster Manager utility.  I then recreated the namespace.  While it works, the share was empty.  This is because by default it placed the namespace in DFSRoots and we have our namespaces in DFSroot (no trailing "s").

So I am trying to delete the new namespace in DFSRoots and create it in the DFSRoot folder, but I get the error listed in the title.  This is what I've tried so far to resolve this:

1. dfsutil to remove the namespace and it fails saying the command is not supported in a cluster environment.  Fair enough.

2. I tried to delete the share (using "Share and "), but it fails saying the shared folder is a DFS namespace root.

3. I tried to find an option to add the namespace to the resource group (using "Failover Cluster Manager") but I can't find the appropriate option.  Maybe it cant be done from the "Failover Cluster Manager" unless you are created a new one, I think.

4. Of course I tried to delete the namespace (using the "DFS Management" utility) and that's where I get the error in the Title of this post.

5. I deleted the registry entry for the namespace under hklm\software\Microsoft\dfs\roots\standalone.  I did this on both Fileserver nodes in the cluster.  However then all the utilities complained that they couldn't find the namespace and I couldn't do anything with the specific namespace.  So I put the registry key back in.

At this point I don't know what else to try to delete this namespace properly.  Any assistance is appreciated.

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Live Migration to Best possible node

February 5, 2014, 9:09 pm
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Hi,

I have a 20 node cluster with virtual machine role.

I would like know equivalent power shell command for migrating VMs to best possible node.

When I right click on VM from cluster manager, I see below option for Live migration to Best possible node. Same thing I would like to achieve through powershell.

Thanks in advance.

Thanks, Krishna

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Failover cluster-Online(redirected) access message

February 6, 2014, 2:20 am
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Hi,

I have a four node cluster with CSV enabled. Out of the three disks in CSV, one of them is showing  the status as "online(redirected access)". The other two disks are showing the correct status "Online". When checking the "critical events" section of the failover cluster i could see the following message:

--

Cluster Shared Volume 'Volume4' ('Cluster Disk 1') is no longer directly accessible from this cluster node. I/O access will be redirected to the storage device over the network through the node that owns the volume. This may result in degraded performance. If redirected access is turned on for this volume, please turn it off. If redirected access is turned off, please troubleshoot this node's connectivity to the storage device and I/O will resume to a healthy state

--

I'm using win 2008 R2. How should i know the exact cause of the  above issue?

I checked the four possible causes as per http://blogs.technet.com/b/askcore/archive/2010/12/16/troubleshooting-redirected-access-on-a-cluster-shared-volume-csv.aspx

Please help me.

Regards,

Jaffer

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