From the course: Proxmox Virtual Environment Essential Training

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High availability

High availability - Proxmox VE Tutorial

From the course: Proxmox Virtual Environment Essential Training

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High availability

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- [Instructor] A VM or container only ever runs on one host or node at a time. Even when we perform live migration, there comes a time in the process where the guest ceases to be running on one node and begins running on the other. This doesn't really cause much, if any disruption when we're live-migrating guests on demand, as we've seen. But what happens when a node goes offline unexpectedly? This can happen suddenly if there's a hardware failure or a power failure. In that case, the VMs that are running on that node will simply vanish from our data center. To help avoid the case where our guests and their data are unexpectedly offline, we can designate our guests to be highly-available. This primarily means two things. First, it means that the cluster will store the configuration information for highly available or HA resources on all the nodes, and second, it means that the resources will be monitored by the cluster's high-availability daemon, which watches the status of these…

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