Hi, Thank you both for your responses,
In a conclusion : - Don't mix up several solution that provide HA : - either choose oVirt HA. - or use software HA inside a VM. And since I need to monitor a service inside the VM for HA purpose, the implementation will be : - Create two VMs (nodes) without oVirt HA enabled. - Create the shared storage. - Configure pacemaker with stonith using fence rhev. - Test the configuration and my be try to test a hypervisor crash to see the behavior of the solution. Regards. 2018-05-24 17:12 GMT+01:00 Gianluca Cecchi <gianluca.cec...@gmail.com>: > On Thu, May 24, 2018 at 6:05 PM, Gianluca Cecchi < > gianluca.cec...@gmail.com> wrote: > >> >> >> >>> >>>> - What about the shared storage, we will use a shared disk on oVirt >>>> which does not support snapshot >>>> >>> >>> What is the question? >>> >> >> >> In the past I had to configure a virtual CentOS 6 cluster because I >> needed to replicate a problem I had in a physical production cluster and to >> verify if some actions/updates would have solved the problem. >> I had no more spare hw to configure an so using the poor-man method (dd + >> reconfigure) I had the cluster up and running with two twin nodes identical >> to the physical ones. >> I also opened this bugzilla to backport the el7 package to el6: >> https://bugzilla.redhat.com/show_bug.cgi?id=1446474 >> >> The intracluster network has been put on OVN btw >> >> But honestly I doubt I will use a virtual-cluster software stack to >> provide high availability to production services inside a VM. Too many >> inter-relations >> >> > I didn't complete the answer about storage. > Indeed if the cluster services need also a storage (eg a filesystem), you > should create dedicated virtual disks that you mark as shared and assign to > all the nodes of the virtual-cluster. > This compromise the snapshot functionality (of only the shared disks, you > can snapshot the boot disk and the not shared disks). > > HIH, > Gianluca > >
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