json logs: use python-json-logger

[boddumanohar]

python-json-logger hooks into the standard library's logging package so all the existing getLogger(name) continue to work just fine.

This is controlled by VELA_LOG_JSON environment variable. By default JSON logging is enabled.

sample output:

{"timestamp": "2026-03-20T14:29:13+0000", "level": "INFO", "logger": "uvicorn.access", "message": "10.244.2.1:42880 - "GET /health HTTP/1.1" 200"}
{"timestamp": "2026-03-20T14:29:18+0000", "level": "INFO", "logger": "uvicorn.access", "message": "10.244.2.1:49488 - "GET /health HTTP/1.1" 200"}
{"timestamp": "2026-03-20T14:29:21+0000", "level": "INFO", "logger": "uvicorn.access", "message": "10.244.2.1:49502 - "GET /health HTTP/1.1" 200"}
{"timestamp": "2026-03-20T14:29:23+0000", "level": "INFO", "logger": "uvicorn.access", "message": "10.244.2.1:49508 - "GET /health HTTP/1.1" 200"}
{"timestamp": "2026-03-20T14:29:25+0000", "level": "INFO", "logger": "simplyblock.vela.api.resources", "message": "Found 1 branches"}
{"timestamp": "2026-03-20T14:29:25+0000", "level": "INFO", "logger": "httpx", "message": "HTTP Request: GET http://192.168.10.66/api/v2/clusters/0c296ee1-b91e-4ecd-8cf9-201a0d555f39/storage-pools/ "HTTP/1.1 200 OK""}
{"timestamp": "2026-03-20T14:29:25+0000", "level": "INFO", "logger": "httpx", "message": "HTTP Request: GET http://192.168.10.66/api/v2/clusters/0c296ee1-b91e-4ecd-8cf9-201a0d555f39/storage-pools/5f3bcaba-208b-4147-b3fa-bc44bc9d2db8/volumes/e21ef5b0-f97d-4a04-a3b8-b3c8b3d4f169/iostats "HTTP/1.1 200 OK""}

[mxsrc]

I suppose this requires adaption of the loki/vector/grafana configuration?

[boddumanohar]

Thanks, missed it. Have updated the vector-config.yaml to fix the parsing as per the new JSON logs.

[boddumanohar]

showing parsed logs in the PR branch deployment's Grafana

[mxsrc]

Great, thanks!