Get node level stats

[souravgupta-msft]

Type of Change

• Bug fix
• New feature
• Code quality improvement
• Other (describe):

Description

Add RPC to get node level stats like memory usage (for now). This can be extended to include other stats like CPU usage, network bandwidth, etc. This information can be seen by doing read on fs=debug/cluster-stats path.
Sample output,

user@user-vm:~$ cat mntdir/fs=debug/nodes-stats
{
  "timestamp": "2025-10-24T08:38:39Z",
  "count": 1,
  "nodes": [
    {
      "node_id": "9b201668-e71f-422c-b2e9-b66bda2343eb",
      "hostname": "user-vm",
      "mem_used_bytes": 3489771520,
      "mem_total_bytes": 12911104000,
      "timestamp": "2025-10-24T08:38:39Z"
    }
  ],
  "aggregate": {
    "mem_used_bytes": 3489771520,
    "mem_total_bytes": 12911104000
  }
}