{"url":"https://nexovirt.com/features/high-availability","title":"Proxmox HA and ZFS replication in one panel · NexoVirt","description":"Manage Proxmox VE high availability and ZFS replication for your clusters: quorum at a glance, HA guests, groups or node affinity rules and replication jobs.","markdown_url":"https://nexovirt.com/features/high-availability.md","sections":[{"heading":"Proxmox HA and storage replication from one panel","content":"For Proxmox VE clusters, NexoVirt manages the cluster's own high availability and storage replication. You see quorum and every node's HA state at a glance, put a guest under HA from its page, and replicate its disks to another node on a schedule, while Proxmox keeps doing the fencing and restarts.\n\n[Install free](https://docs.nexovirt.com/getting-started/installation/) [Read the HA & replication guide](https://docs.nexovirt.com/guides/ha/)\n\n![HA & replication in the NexoVirt panel](https://nexovirt.com/assets/img/screenshots/ha-cluster-light.webp?v=1793111507)"},{"heading":"What it does","content":"Cluster status, HA guests and ZFS replication jobs, with an agent on every node.\n\n- ### Cluster status\n\nCluster name, quorum, the active HA manager, the Proxmox VE version and every node with its local resource manager state.\n- ### HA per guest\n\nRequested state, group or rule, max restart and max relocate, set on the guest page. The confirmation lists every value that changes.\n- ### Groups or rules\n\nHA groups on Proxmox VE 8, node affinity rules on Proxmox VE 9. The panel picks the right model from the version.\n- ### Storage replication\n\nReplication jobs per guest with target node, schedule and rate limit, plus Run now. The panel checks that every disk is on ZFS first.\n- ### An agent on every node\n\nEach cluster node gets its own agent: onboarding, updates, health, NAT, firewall and VPN run per node, and the API fails over to another member when one is down.\n- ### Guarded changes\n\nChanges need quorum and a fresh sign-in proof, and land in the audit log. Safety copies and HA-managed guests are protected from conflicting actions."},{"heading":"Why not just use the Proxmox web UI?","content":"Proxmox VE runs the virtualization. NexoVirt adds the layer around it. HA & replication, task by task:\n\n| Task | Proxmox web UI | NexoVirt |\n|---|---|---|\n| Put a VM under HA | Datacenter, HA, Add, one cluster at a time | A section on the guest page |\n| Replicate a VM to another node | Replication tab per guest | Next to HA on the guest page, ZFS checked first |\n| Watch several clusters | One cluster web UI each | Every cluster's HA page in one panel |"},{"heading":"How to use it","content":"Up and running in 4 steps, all in the panel.\n\n1. Add the cluster and set up the agent on every node.\n2. Open a node and choose Actions, High availability to see the cluster status.\n3. On a guest page, open High availability, pick the requested state and click Add to HA.\n4. Add a replication job with its target node and schedule.\n\n[HA & replication: step-by-step guide in the docs](https://docs.nexovirt.com/guides/ha/)"},{"heading":"See it in the panel","content":"Real screenshots from NexoVirt, with demo data.\n\n![HA and a ZFS replication job on a guest page.](https://nexovirt.com/assets/img/screenshots/guest-ha-light.webp?v=1793111507)\n\nHA and a ZFS replication job on a guest page."},{"heading":"HA & replication FAQ","content":"Does NexoVirt replace Proxmox HA?No. HA and replication run inside Proxmox VE. NexoVirt reads and writes their configuration, so the cluster keeps fencing and restarting guests on its own.\n\nCan I use HA on a single Proxmox node?No. HA and replication need a Proxmox VE cluster. For standalone hosts, assisted failover restores guests from Proxmox Backup Server backups instead.\n\nWhy is replication only offered for some guests?Proxmox storage replication works with ZFS. NexoVirt offers it only when every disk of the guest is on a ZFS pool."},{"heading":"Related pages","content":"- [ Assisted failover Bring a failed node's guests back from their latest PBS backups. ](https://nexovirt.com/features/failover)\n- [ Migration & evacuation Move guests between separate nodes and clusters, live, with a safety copy. ](https://nexovirt.com/features/migration)\n- [ Multi-host & onboarding Every Proxmox host and cluster in one panel, fresh or already running. ](https://nexovirt.com/features/multi-host)\n- [ All features Everything NexoVirt adds to Proxmox VE. ](https://nexovirt.com/features)"},{"heading":"Start running NexoVirt today","content":"Free for homelabs with unlimited VMs on up to 2 nodes. Running a hosting business? Upgrade in place when you grow, no migration.\n\n[Install free](https://docs.nexovirt.com/getting-started/installation/) [See pricing](https://nexovirt.com/pricing)"}],"faq":[{"question":"Does NexoVirt replace Proxmox HA?","answer":"No. HA and replication run inside Proxmox VE. NexoVirt reads and writes their configuration, so the cluster keeps fencing and restarting guests on its own."},{"question":"Can I use HA on a single Proxmox node?","answer":"No. HA and replication need a Proxmox VE cluster. For standalone hosts, assisted failover restores guests from Proxmox Backup Server backups instead."},{"question":"Why is replication only offered for some guests?","answer":"Proxmox storage replication works with ZFS. NexoVirt offers it only when every disk of the guest is on a ZFS pool."}]}