Backlog #1649 Prometheus smoke

scripts/prometheus_metrics_1649_smoke.py is a read-only environment check for the metric dimensions delivered by backlog #1649 and issues #1650-#1653. It uses Prometheus' instant-query API and does not start, stop, reconfigure, or load RustFS nodes.

Run the parser and selector self-test without a live environment:

bash

python3 scripts/prometheus_metrics_1649_smoke.py --self-test

For a live cluster, pass a Prometheus base URL (or its /api/v1/query endpoint), one or more expected server label values, and the built-in profile:

bash

python3 scripts/prometheus_metrics_1649_smoke.py \
  --query-url http://prometheus.example:9090 \
  --profile backlog-1649 \
  --server rustfs-node1 \
  --server rustfs-node2

The profile checks the disk, scanner, ILM, audit, and notification series and their required labels. It also requires the legacy aggregate audit and notification series, so an additive label change cannot silently break existing dashboards.

Dynamic series retirement is checked with an exact label set after the scheduler retirement window has elapsed:

bash

python3 scripts/prometheus_metrics_1649_smoke.py \
  --query-url http://prometheus.example:9090 \
  --retired 'rustfs_scanner_bucket_drive_result_total|server=node1,bucket=removed,drive=d1,result=success' \
  --retired 'rustfs_audit_total_messages_by_server|server=node1,target_id=removed'

--require METRIC|key=value,... requires a matching series; --require-labels METRIC|key1,key2 requires every returned series to carry the named labels. Use --bearer for a bearer token or --basic for a username:password credential when Prometheus is protected. Do not put credentials in committed commands, logs, or issue comments.