Located under /etc/pve/.members, the member node file shows all the member nodes that are part of the Proxmox cluster. It is a great way to see the cluster status when the Proxmox GUI becomes inaccessible for any reason. The following is the .members file in our basic cluster:

"nodename": "pm4-2" 

The nodename section shows the current node where the .members file is being accessed:

"version": 4 

The .members file has its own version numbering system. Like the .version file, every time .members is changed, the version increases incrementally. For example, when a node is added or removed from the cluster, the version number moves upward:

"cluster": { "name": "pmx-cluster", "version": 2, "nodes": 2, "quorate": 1 }, 

The previous code shows the cluster information, such as the cluster name, cluster version, number of member nodes, and number of votes (quorate) needed to form a quorum.

"nodelist": {  }

Nodes mentioned in the node list section provide information about each node, such as the ID, online/offline status, and IP address.