rob thijssen
67b9b044d3
Emit cortex_requests_total, cortex_request_duration_seconds, cortex_request_errors_total, and cortex_cold_starts_total with model and node labels on every proxied request. Add install_test_recorder() for testing metrics without HTTP listener. Integration test verifies counters and histograms appear after proxy. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
mod common;
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use serde_json::json;
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#[tokio::test]
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async fn test_metrics_emitted_after_proxy() {
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// Install a test recorder (no HTTP listener, renders to string).
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// This sets the global recorder, so only one test can do this.
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let handle = cortex_gateway::metrics::install_test_recorder().expect("recorder should install");
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let mock_url = common::spawn_mock_backend().await;
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let gw_url = common::spawn_gateway(&mock_url).await;
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// Verify no request metrics yet.
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let before = handle.render();
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assert!(
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!before.contains("cortex_requests_total"),
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"no request metrics before any requests"
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);
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// Make a successful request.
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let client = reqwest::Client::new();
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let resp = client
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.post(format!("{gw_url}/v1/chat/completions"))
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.header("content-type", "application/json")
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.json(&json!({
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"model": "test-model",
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"messages": [{"role": "user", "content": "Hi"}]
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}))
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.send()
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.await
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.expect("request should succeed");
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assert_eq!(resp.status(), 200);
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// Consume the response body to ensure the proxy completes.
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let _body: serde_json::Value = resp.json().await.unwrap();
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// Check metrics were emitted.
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let after = handle.render();
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assert!(
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after.contains("cortex_requests_total"),
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"cortex_requests_total should be present after a request.\nMetrics:\n{after}"
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);
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assert!(
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after.contains("cortex_request_duration_seconds"),
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"cortex_request_duration_seconds should be present.\nMetrics:\n{after}"
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);
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// Should NOT have error or cold start counters for this request.
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assert!(
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!after.contains("cortex_request_errors_total"),
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"no errors expected for a successful request"
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);
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}
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