Book Tipp: Introduction to Windows Server Failover Clustering

Hi everybody,

5nine Software Vice President Symon Perriman published a book with some cool best practices for configuration Windows Server Failover Clusters. ūüôā

Greate stuff and great to read.

You can download it here.

Where to find logs from cluster role movement?

Hi everybody,

as you know sometimes it is neccessary to get some more information about where and when roles within a cluster were successfully moved from one node to another.

One example could be Hyper-V Livemigrations or role movements from mixed role cluster servers.

When you have errors or warnings during rolemigrations, you can see the events directly within the failover cluster manager.

2016-02-19_11-03-59

But what is if I want to see successfull role moves? Where do I find them?

Those messages are a bit hidden within the logfile structures of a Windows Server.

  1. Navigate to Applications and Services Logs\Microsoft\Windows\Failover Clustering\Operational
  2. There you can find several events dependig if you are on the role sender or receiver2016-02-19_11-07-222016-02-19_11-07-522016-02-19_11-08-14

Hyper-V|W2k12R2|4x1GB|2xFC

Hyper-V Cluster Network configuration with following parameters:

The following configuration leverages 4x 1GB Ethernet and 2x Fibre channel connections. The storage can be connected via Fibre Channel with MPIO. The configurations uses physical configuration and software defined / converged network for Hyper-V.


¬†Pro’s and Con’s of that solution

 Pro Con
– High Bandwidth for VM- Good Bandwidth for Storage
– Fault redundant
– Can be used in switch independent or LACP (with stacked switches) teaming mode
– Fibrechannel ist most common SAN technology
– Limited Bandwidth for Livemigration
– a lot of technologies involved

 Switches

Switch name Bandwidth Switchtyp
1GBE SW01 1 GBit/s physical stacked or independed
1GBE SW02 1 GBit/s physical stacked or independed
FC SW01 4/8 GB FC/s physical stacked or independed
FC SW02 4/8 GB FC/s physical stacked or independed
SoftSW01 1 GBit/s Software defined / converged
SoftSW02 1 GBit/s Software defined / converged

 Neccessary Networks

Networkname VLAN IP Network (IPv4) Connected to Switch
Management 100 10.11.100.0/24 SoftSW01
Cluster 101 10.11.101.0/24  SoftSW01
Livemigration 450 10.11.45.0/24  SoftSW01
Virtual Machines 200 Рx 10.11.x.x/x  SoftSW02

 Possible rearview Server

NIC17


 Schematic representation

NIC14 NIC15

Switch Port Configuration

NIC16  

Bandwidth Configuration vNICs

vNIC min. Bandwidth Weight PowerShell Command
Management 20%
Cluster 10%
Livemigration 40%

QoS Configuration Switch

Networkname Priority
Management medium
Cluster high
Livemigration medium
VMs dependig on VM Workload

 

You install Hyper-V & VMM from the green? Please do it in the right order.

Hi everybody,

today another story I see most of the days when I do Healthcheck on customer site.

One of the first things I found was a new VMM installation on top of a new Microsoft Hyper-V Cluster. The issue was, that the cluster was installed first and every thing was running on Hyper-V converged network and standard Hyper-V Switches. There was no VMM network configured or the host made compliant within VMM.

Why is that so bad? It’s bad because VMM uses it’s own kind of switches (logical switches) and needs some additional configurations to manage the hosts in the best possible way.

When I ask guy’s why they do it in that way, I normally get the answer “how should I configure the host when no VMM is in place before he install the cluster?”.

So now my answer and how you can do it in the right way.

  1. Install a Hyper-V Host as Standalone host
  2. Configure and install the VMs for VMM and SQL Server (if needed) on the standalone host
  3. Performe the ful VMM configuration
  4. Install the other Hyper-V Hosts and roll out the VMM configuration to that hosts
  5. Cluster the Hyper-V Hosts
  6. Migrate your SQL DB and VMM with shared nothing livemigration to the new Hyper-V Cluster
  7. Reconfigure the standalone Hyper-V Host with VMM and add it to the cluster
  8. Run the cluster validation again

That’s all and it will cost you the same amount of time.

Small scripts to configure Livemigration on Hyper-V Hosts & Cluster

Hi everybody,

based on blogposts by¬†John Savill and Ben Armstrong I developed two small scripts to configure Livemigration on Hyper-V Hosts and Cluster to save some time for configuration. I will no provide my whole script but I think the two snipes will help you too ūüôā

First one you run on all Hyper-V Hosts.

The next one you run on the cluster its self. You only need to run one, depending on what suits you best.