minio/internal
Klaus Post c5b3f5553f
Add per connection RPC metrics (#19852)
Provides individual and aggregate stats for each RPC connection.

Example:

```
  "rpc": {
   "collectedAt": "2024-05-31T14:33:29.1373103+02:00",
   "connected": 30,
   "disconnected": 0,
   "outgoingStreams": 69,
   "incomingStreams": 0,
   "outgoingBytes": 174822796,
   "incomingBytes": 175821566,
   "outgoingMessages": 768595,
   "incomingMessages": 768589,
   "outQueue": 0,
   "lastPongTime": "2024-05-31T12:33:28Z",
   "byDestination": {
    "http://127.0.0.1:9001": {
     "collectedAt": "2024-05-31T14:33:29.1373103+02:00",
     "connected": 5,
     "disconnected": 0,
     "outgoingStreams": 2,
     "incomingStreams": 0,
     "outgoingBytes": 38432543,
     "incomingBytes": 66604052,
     "outgoingMessages": 229496,
     "incomingMessages": 229575,
     "outQueue": 0,
     "lastPongTime": "2024-05-31T12:33:27Z"
    },
    "http://127.0.0.1:9002": {
     "collectedAt": "2024-05-31T14:33:29.1373103+02:00",
     "connected": 5,
     "disconnected": 0,
     "outgoingStreams": 6,
     "incomingStreams": 0,
     "outgoingBytes": 38215680,
     "incomingBytes": 66121283,
     "outgoingMessages": 228525,
     "incomingMessages": 228510,
     "outQueue": 0,
     "lastPongTime": "2024-05-31T12:33:27Z"
    },
...
```
2024-05-31 22:16:24 -07:00
..
2024-01-17 23:03:17 -08:00
2022-12-30 11:37:07 -08:00
2023-03-04 20:57:35 -08:00
2024-01-17 23:03:17 -08:00