Added ZFS state metrics

README.md

@@ -4,7 +4,7 @@ Proxmox Virtual Environment Prometheus metrics exporter.
 
 ## Overview
 
-PVE Exporter is a tool that collects metrics from a Proxmox Virtual Environment cluster and exposes them for Prometheus to scrape. This exporter supports gathering metrics for cluster state, LXC containers, QEMU virtual machines, physical disks, node storage, node status, node subscription details, and software-defined networking (SDN).
+PVE Exporter is a tool that collects metrics from a Proxmox Virtual Environment cluster and exposes them for Prometheus to scrape. This exporter supports gathering metrics for cluster state, LXC containers, QEMU virtual machines, physical disks, ZFS pools, node storage, node status, node subscription details, and software-defined networking (SDN).
 
 ## Features
 
@@ -52,6 +52,7 @@ metrics:
   ltc: true            # Enable collection of LXC container metrics.
   qemu: true           # Enable collection of QEMU virtual machine metrics.
   disk: true           # Enable collection of physical disk metrics.
+  zfs: true            # Enable collection of ZFS pool metrics.
   storage: true        # Enable collection of node storage metrics.
   nodeStatus: true     # Enable collection of node status metrics.
   subscription: true   # Enable collection of node subscription details.
@@ -65,6 +66,14 @@ The `pve_node_subscription_status` metric uses `0` when no subscription is
 configured, `1` for an active subscription, and `2` for an expired or otherwise
 unusable subscription.
 
+The ZFS collector discovers all pools on every node and exports their recursive
+topology with `cluster`, `node`, `pool`, `component`, `path`, and `leaf` labels:
+
+- `pve_node_zfs_state` (`1` for `ONLINE`, otherwise `0`)
+- `pve_node_zfs_read_errors`
+- `pve_node_zfs_write_errors`
+- `pve_node_zfs_checksum_errors`
+
 ## Build
 
 To build the Docker image for PVE Exporter, use the following command: