So I’ve been collecting some HA best practices lately. I just wanted to have them all in one place so I can use them myself for the VMTN forum and/or customers. The first two are obvious in my opinion but still often overlooked:
- Your ESX host-names should be in lowercase and use fqdn’s
- Provide Service Console redundancy
- If you add an isolation validation address with “das.isolationaddress”, add an additional 5000 to “das.failuredetectiontime”
- If your Service Console network is setup with “active / standby” redundancy then your ”das.failuredetectiontime” needs to be set to 60000
- If you ensured Service Console redundancy by adding a secondary service console then ”das.failuredetectiontime” needs to be set to 20000 and you need to setup an additional “das.isolationaddress”
- If you setup a secondary Service Console use a different subnet and vSwitch then your primary has
- If you don’t want to use your default gateway as an isolation validation address or can’t use it because it’s a non-pingable device then disable the usage by setting das.usedefaultisolationaddress to false and add a pingable “das.isolationaddress”
- Change default isolation response to “power off vm” and set restart priorities for your AD/DNS/VC/SQL servers
So if you’ve got more, add them into the comments and I will update the list!
Hi,
I tell my customers that they must foster there hosts files.
Thomas