Today my colleague (vmware administrator) asked me a small favour – help to perform RCA (root cause analyze) – related to one of production VM that had recently a problem. VM for some reason was migrated (collegue stands that it happened without administrative intervention) to other ESXi host that do not have proper network config for this vm – this caused outage for whole system. I asked about issue time and we went deeper into logs in order to find…
Survival guide for any vm snaphost consolidation problems all in one place : Note! Make sure any backup software is turned off or that all jobs are stopped. A reboot of the backup server is required to clear any potential residual locks. Restart vc service – https://kb.vmware.com/kb/1003895 Restart the management agents on the ESXi cluster where problematic vms are working #services.sh restart – https://kb.vmware.com/kb/1003490, or manually verify to determine “who” is holding the lock 3. Use vmfstools (-D) command against vm…
Sound Card in vSphere Virtual Machine is an unsupported configuration. This is feature dedicated to Virtual Machines created in VMware Workstation. However, you can still add HD Audio device to vSphere Virtual Machine by manually editing .vmx file. I have tested it in our lab environment and it works just fine. Below procedure how to do this: 1. Verify storage where VM with no soundcard reside Login with root to the ESXi host where VM reside using SSH. 3. Navigate…
Before we start I would like to describe main motivation to write this article which is quite simple – to gather in one place all basic theoretical background about iscsi protocol and best practices at its implementation on vSphere platform with special consideration about potential performance tuning tips & tricks . This is first part of the series where We (I’m counting on readers participation) try to gather and verify all this “magical” parameters often treated as myths by…
Virtual SAN provides the Storage Performance Proactive Tests which lets you to check parameters of your environment in an easy way. You just need few clicks to run a test. Well, we can see a lot of tests from nested labs in the Internet, however there are not so many real examples. I decided to share some results of such a real environment which consists 5 ESXi hosts. Each is equipped with 1x SSD Disk 1,92 TB and 5x HDD…