Find VMs without tags

Check Backup-Tag SLA

VMware tags are a versatile tool to dynamically assign VMs to groups. One use-case is leveraging VM-Tags to guarantee backup-SLA. Im my case there’s a category named “Backup” which contains several backup SLA tags for weekly or daily backups.


With PowerCLI you can find out quickly which VMs have no tags.

connect-viserver myVC
get-vm | ?{ (get-tagassignment $_) -eq $null}

This query isn’t sufficient yet. It’ll report only VMs that have no tags at all. But we’d like to find VMs that have no tags from the category “Backup”. So we have to modify our query a little bit.

get-vm | ?{ (get-tagassignment $_ -category Backup) -eq $null}

You need to adjust your query with the corresponding category name.


ESX physical uplink resiliency

Ensure vmnic uplink redundancy with Link State Tracking / Smart Links

A vSphere cluster is redundant in many aspects. The loss of one component may not lead to a loss of functionality. Therefore we are building RAID sets from multiple disk drives, have redundant controllers in our storages, have multiple paths, redundant LAN- and SAN-switches and multiple uplinks from a host to the physical network.

VMware vSphere uses multiple physical NICs to form a logical NIC in order to gain redundancy. This is crucial for kernelports, which are responsible for vMotion, Management Network, FT, iSCSI and Heartbeats.

But there are scenarios where all vmnics have physical uplink, but a path loss further downstream towards the core lets packets wander into a black hole.

We will now discuss some network architectures and how to work around the issue.

Continue reading “ESX physical uplink resiliency”

Top vBlog 2018 Elections

vCommunity votes for most important Blogs 2018

This year, like many years before, Eric Siebert from holds elections to Top vBlog 2018. You can vote for your favourite blogs in virtualization.

How can everybody vote?

Rules are simple. Everybody can vote for ones personal top 12 blogs. In a second step you can rank your 12 selected sites. First rank 12 points, 12th rank 1 point. There are special categories too. Best scripting blog, best female blogger, best non-english blog, best newcomer etc.

There are roughly 300 blogs nominated and I’m happy to be one of them.

Don’t hesitate and vote for your Top vBlog 2018.