I’m pleased to announce this blog is a finalist in the 2018 IT Blog Awards hosted by Cisco in the category of “Best Analysis”. Voting is open to the tech community through January 4th 2019, so if you’ve found this blog useful or insightful at any point (or you’ve followed my advice and your datacentre didn’t catch fire as a result) please can you go to http://cs.co/itblogawards and pop in a vote for “IT Should Just Work” in the first section.
If you don’t want to vote for this blog, that’s fair enough, but I’d still recommend having a look at the voting form if only for the awesome “I’m not a bot” section at the bottom.
vSAN licenses are assigned per-cluster, so whilst the total number of vSAN licenses in a vCenter inventory might match the total number of vSAN host CPUs, they may not be assigned correctly to the clusters. This will trigger the critical vCenter alarm “License inventory monitoring”. This will also occur if a cluster is expanded (e.g. additional hosts and vSAN licenses are purchased) as it’s only possible to assign one license key to each cluster.
In the example screenshot here we have 2 vSAN license keys, each valid for 8 CPU. The total 16 CPU capacity matches the 16 CPU in use. However, one cluster has 10 CPUs (i.e. 5 dual socket hosts) and the other only 6 CPU. Therefore one license key is 2 CPU oversubscribed whilst the other has 2 free.
The method to resolve this is to use the MyVMware license portal to split and merge your pool of vSAN licenses until you have license keys where the capacities match your cluster sizes, and then re-license the vSAN environment. This VMware KB article explains in detail how to do this divide, and merging is a similar process on the same interface: https://kb.vmware.com/s/article/2006972
In the example screenshot above, this was a case of splitting one of the 8 CPUs into a 6 and a 2, and then merging that 2 with the remaining 8 CPU key to create a 10 CPU key and a 6 CPU key which matched the cluster sizes. The old 8-CPU key that was split was removed from the license inventory.
Big news today from workload monitoring and management vendor VMTurbo – The name has gone and the brand is now called “turbonomic”.
The name change emphasises several facets of the company’s product- not least that it’s not limited to Virtual Machines, or VMware. At a community briefing by Eric Wright last week the compatibilities with Microsoft Hyper-V, XenServer, RHEL, plus container and cloud platforms were highlighted just for starters.
What’s in a name? Continue reading
I don’t spend quite as much time reading books as I’d like to, in fact I think my new years resolution this year might be to read more IT books. In this world of blog posts, white papers, online articles, webinars, and video it’s easy to overlook the more traditional material (even in eBook form)- but it’s still probably my best option for taking some time out and focusing in depth on a subject. Looking back at last year, here’s some of the new (to me) books I read in 2015.
In case you missed it, here are some of the highlights of this blog from the last year.
PowerShell and PowerCLI
Windows in General
Have a great 2016!