When Microsoft launched Hyper-V on Windows Server 2008, it did not have a Live Migration (vMotion) feature. If a cluster node failed, failover would restart the virtual machine on another host, just like VMware. But we could not proactively move a virtual machine from one host to another. So imagine, after years of engineering made Hyper-V Live Migration best-in-class, Azure “didn’t have Live Migration”.
Realistically, there were 3 scenarios when you would want Live Migration to move virtual machines from one host to another with perceivably no downtime:
Microsoft finally admitted recently that Live Migration is in Azure for the above last scenario and has been there since early 2018. It has also been used in some of the patching scenarios, for example when doing their “regular fleet operations” such as software/BIOS updates.
The big story was how they’ve reduced failures by 50% by combining Live Migration (LM) with machine learning (ML), giving us what I guess we can call MLLM. Azure gathers numerous hardware and software health signals to detect faults. ML can read this matrix of data and predict failures before they happen. Live Migration can then be used to drain affected hosts of virtual machines and relocate them to healthy hosts without the customer noticing unless they look for the tell-tale signs of a vMotion or Live Migration.
Did you ever need a simple website for some quick job? But you find yourself having to deploy an Azure App Service or a virtual machine, when all you needed was a simple HTML hosting capacity. Good news – you can now host static websites on Azure Storage. If your website doesn’t require host-side execution, then this solution might be suitable – although Microsoft does discuss a few ways to combine other Azure services to execute code. Note that this is hosting in a storage account, so things like static IP addresses or Insights won’t be available.
The costs will be low – blob storage (GB and transactions) and outbound data transfer.
Here are other Azure IaaS headlines from the past month:
Here are my Azure posts from the month of November:
I have nothing! See you all in 2019!