How to use VMDK sharing for Guest OS clustering

Operating system clustering is one of the major and popular high availability mechanism in system infrastructure products. Advantage of the os clustering is it can identify the application level failure.

As a systems administrators most of the time we may need to work with MS windows failover clusters. Most of the file servers and SQL clusters are depend on this failover cluster technology. Most of the situation one of the main requirement is this failover cluster is shared lus/disk. Earlier most of the time we sued to have minimum two physical servers for this cluster operation which is directly connect to SAN device(Shared storage). But to get the benefits of virtualization platform and reduce the cost , now we have to use same cluster features on top of the virtualization platform.

1. In my below example Im using two test virtual machines.

image

2. Now we need to add new scsi controller per this vm


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Troubleshooting vMotion

This blog post from blogs.vmware.com is dedicated to gaining more knowledge on what to do when troubleshooting vMotion if a live-migration is not successful. What are typical reasons for failed migrations? What logs to look into? Let’s have a look at how you can troubleshoot and prevent vMotion operations to fail

Full VMware Blog Troubleshooting vMotion

NSX-T 2.5 – A New Marker on the Innovation Timeline

NSX-T has seen great success in the market for multi-platform network and security use-cases, including automation, multi-cloud adoption, and containers as customers move through the digital transformation initiative. NSX-T is the industry’s only network and security platform delivering a wide range of L2-L7 services, built from the ground up for workloads running on all types of infrastructure – virtual machines, containers, physical servers and both private and public clouds.

Follow the link for full article NSX-T 2.5 – A New Marker on the Innovation Timeline

How to increase disk space of vCenter appliance

vCenter appliance is a vm and most of the time we are running it on the same ESXi cluster.

In some cases we may need to increase the disk capacity of some partition(most of the time its log file path).If our vCenter is running out of disk space, vCenter related services may not tart as expected. To resolve this issue we need to increase the free space capacity of the vCenter appliance.

How to do this

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ESXI shell register all the *.vmx files in datastore/s

Using below bash script we can register all the vms in datastores with ESXi host.This has tested in vSphere 6.5 & 6.7 Hol
 
for myvm in $(find / -name *.vmx);

do

vim-cmd solo/registervm $myvm

done

if we want we can find on specific datastore. please refer the below example
find /vmfs/voluems/datastore10R10/ -name *.vmx
(datastore10R10 is my datatore name)
 
 
 
 
 
 

Configure backup & restore vCenter 6.7

This is a very useful feature when its working with changes.This is the easiest way to restore our vCenter.

As a destination backup media we need to have http,https,ftp or ftps server. Since I had windows server. Just I add web roles with ffp feature sfrom server manager.

Once I completed that process. I have to do the following configuration on windows server.

Open Internet information service manager

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