Hi. Who can help me with: I have two physical servers, one is freshly installed and on the other I have the virtual machines. I would like to make a cluster with HA and have a security of redundancy. If one falls, I'll have the other. How should I do it and if someone can help me
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Mar 01, 2024 12:56 am
7 Replies
Mar 01, 2024 1:58 pm
Hello @neneia, welcome to the forums! Can you give some details on the environment, the servers, storage, networking? That would be helpful to know how to give some feedback.
Mar 01, 2024 2:02 pm
two dell servers, two private ips that communicate with each other, each of them, are linked via vcenter. storage have minim 10TB. I read how to do HA, but something seems to be holding me back, especially since the virtual machines are live and I shouldn't take them down
Mar 01, 2024 2:38 pm
@neneia so for true HA, you will need to have the VMs located on shared storage that both of the hosts can get to (NFS, iSCSI SAN/NAS, etc) Otherwise, you could do a two-node vSAN cluster comprised of the two servers local storage added to vSAN.
HA requires that both servers are able to get to the VM storage which makes sense since if one fails, the other will need to have access to the VM files to take ownership and restart them due to the HA event. Let me know if this makes sense. Do you have some type of shared storage?
Mar 01, 2024 3:10 pm
Both have access to the same space, the space between them differs slightly, one server has more, the other less, but when they arrive, they can change them.
I have attached the print screen
Mar 01, 2024 3:29 pm
@neneia just to clarify, those actually look like locally attached storaged with local hard disks. Is that correct? You would need to have a datastore that is shared between the two hosts to ensure you have failover between the two with HA. Let me know if one of those datastores is shared between them.
Mar 01, 2024 3:33 pm
I didn't do any sharing, but they can work with each other. if I create clones, vcenter solves it quickly
Mar 01, 2024 9:47 pm
@neneia Keep in mind a clone is a point in time copy of a virtual machine. If the data changes on the original VM, the clone doesn't contain the new information. If you don't have shared storage, you could look at a solution to replicate your VMs from the source host to the target host, say hourly, and then the most data loss you would experience would be 1 hour's worth of data.
I know several of the enterprise backup solutions will allow you to protect 10 workloads for free. Solutions like Veeam, NAKIVO, and BDRSuite by Vembu.