Set non-empty METRICS_BIND in the environment to enable GET /metrics on the same host/port as the API (value is a flag; scrape http://<API_BIND>:<API_PORT>/metrics).
Counters: indexer_blocks_processed_total, indexer_block_process_errors_total, indexer_block_time_fallbacks_total (indexer/src/metrics.rs, wired from indexer/src/indexer/poller.rs).
/metrics is mounted outside the rate-limit layer (indexer/src/api/mod.rs).
Tests: indexer/tests/api_metrics.rs (lazy DB pool), metrics::tests in lib.

Verify: cd indexer && cargo test --test api_metrics --lib metrics::

@brouie please review.

## Epic #62 delivery Optional Prometheus metrics: - Set **non-empty** `METRICS_BIND` in the environment to enable `GET /metrics` on the **same host/port as the API** (value is a flag; scrape `http://<API_BIND>:<API_PORT>/metrics`). - Counters: `indexer_blocks_processed_total`, `indexer_block_process_errors_total`, `indexer_block_time_fallbacks_total` (`indexer/src/metrics.rs`, wired from `indexer/src/indexer/poller.rs`). - `/metrics` is mounted **outside** the rate-limit layer (`indexer/src/api/mod.rs`). - Tests: `indexer/tests/api_metrics.rs` (lazy DB pool), `metrics::tests` in lib. Verify: `cd indexer && cargo test --test api_metrics --lib metrics::` @brouie please review.

PlasticDigits commented

2026-04-13 12:29:18 +00:00

(Migrated from gitlab.com)

mentioned in issue #62

Brouie commented

2026-04-20 06:58:46 +00:00

(Migrated from gitlab.com)

@PlasticDigits Verified on current main. All 3 tests pass:

Unit (metrics::tests): 1 passed

gather_contains_indexer_counters

Integration (api_metrics): 2 passed

prometheus_metrics_not_exposed_by_default
prometheus_metrics_when_enabled

Implementation confirmed: indexer/src/metrics.rs exposes counters indexer_blocks_processed_total, indexer_block_process_errors_total, indexer_block_time_fallbacks_total. /metrics mounted outside rate-limit layer per indexer/src/api/mod.rs. METRICS_BIND env var gates the endpoint (disabled by default, enabled when non-empty).

Optional Prometheus metrics properly wired. Closing.

@PlasticDigits Verified on current main. All 3 tests pass: **Unit (metrics::tests):** 1 passed - gather_contains_indexer_counters **Integration (api_metrics):** 2 passed - prometheus_metrics_not_exposed_by_default - prometheus_metrics_when_enabled Implementation confirmed: indexer/src/metrics.rs exposes counters indexer_blocks_processed_total, indexer_block_process_errors_total, indexer_block_time_fallbacks_total. /metrics mounted outside rate-limit layer per indexer/src/api/mod.rs. METRICS_BIND env var gates the endpoint (disabled by default, enabled when non-empty). Optional Prometheus metrics properly wired. Closing.

Brouie (Migrated from gitlab.com) closed this issue

2026-04-20 06:58:50 +00:00

Brouie commented

2026-04-20 07:20:01 +00:00

(Migrated from gitlab.com)

mentioned in issue #97