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vesper_pl
Contributor
Contributor

Setting HA problem with mascine failure [Vcenter 4.1]

Hi

I don't know what i did wrong in my setup. I create a HA cluster with any problem i have 4 host (right now they using less then 50% of Memory) for test i move one test machine to one of the cluster to see if i shutdown server using RSA[then F12 reboot] machine will be migrated without turning off to another one... but it's migrated with reboot sequence. For me it would be better if stay online  without reboot. I read it can be problem with Vmotion but i test it using migrate option and it working well. I have filling i didn't setup something or wrongly understand option .

Thx for help

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a_p_
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Leadership

I think you are mixing up two features. HA - which is supposed to restart VMs in case of a host failure - and DRS, which live migrates VM's to other hosts if required. DRS will also kick in if you set the host to Maintenance Mode so you can safely reboot the host once all VM's have been migrated off the host. Using the F12 method to reboot or shutdown the host will result in a hard reboot/shutdown where HA will restart the VMs on other hosts if configured that way.

André

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vesper_pl
Contributor
Contributor

Hmm so i should configure DRS to have option of migrating live from failure host?? do you have maybe a  link for  step by step how to?? i want to do it right

Smiley Happy

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a_p_
Leadership
Leadership

Not exactly, there's no way to live migrate VMs from a failed host. If the host is dead, the VMs which were previously running on theis host are dead too and HA will try to restart them on remaioning hosts.

André

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vesper_pl
Contributor
Contributor

hmm but if I use FT for it?? i have two VM, they need to work all the time  (production servers)

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a_p_
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Leadership

Fault Tolerance might be an option. However, keep in mind that FT still has several limitations, e.g. 1 vCPU, no snapshots, ...

André