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5 Commits

Author SHA1 Message Date
Eric Eastwood 858c9dde8b
We can better detect static assets to avoid tracing nowadays (#207) 
Because all assets are served from `/assets` since https://github.com/matrix-org/matrix-public-archive/pull/175
 2023-05-02 00:55:22 -05:00
Eric Eastwood 9078abf4f1
Timeout requests and stop processing further (#204) 
Fix https://github.com/matrix-org/matrix-public-archive/issues/148
Fix https://github.com/matrix-org/matrix-public-archive/issues/40

 - Apply timeout middleware to all room directory and room routes
 - Stop messing with the response after we timeout. Fix https://github.com/matrix-org/matrix-public-archive/issues/148
    - This also involves cancelling any `async/await` things like requests in the routes so we throw an abort error instead of continuing on. Fix https://github.com/matrix-org/matrix-public-archive/issues/40
 - Also abort the route if we see that the user closed the request before we could respond to them
 - Bumps minimum supported Node.js version to v18 because we're now using the built-in native `fetch` in Node.js vs `node-fetch`. This gives us the custom `signal.reason` that we aborted with instead of a generic `AbortError`.
    - This also means we had to add some instrumentation for `fetch` which uses `undici` under the hood. Settled on some unofficial instrumentation: [`opentelemetry-instrumentation-fetch-node`](https://www.npmjs.com/package/opentelemetry-instrumentation-fetch-node)
 2023-05-02 00:39:01 -05:00
Eric Eastwood ff315141fd
Add domain to tracing service to distinguish different Matrix public archive instances (#76) 2022-10-11 16:03:33 -05:00
Eric Eastwood b5b79b94f2
Manually instrument some archive logic (#44) 2022-08-29 14:13:13 -05:00
Eric Eastwood ddfe94beab
OpenTelemetry tracing so we can see spans where the app is taking time (#27) 
OpenTelemetry tracing so we can see spans where the app is taking time.
For the user, we specifically show the spans for the external API HTTP requests
that are slow (so we know when the Matrix API is being slow).

Enable tracing:

 - `npm run start -- --tracing`
 - `npm run start-dev -- --tracing`

What does this PR change:

 - Adds OpenTelemetry tracing with some of the automatic instrumentation (includes HTTP and express)
    - We ignore traces for serving static assets (just noise)
 - Adds `X-Trace-Id` to the response headers
 - Adds `window.tracingSpansForRequest` which includes the external HTTP API requests made during the request
 - Adds a fancy 504 timeout page that includes trace details and lists the slow HTTP requests
 - Adds `jaegerTracesEndpoint` configuration to export tracing spans to Jaeger
 - Related to, https://github.com/matrix-org/matrix-public-archive/issues/26
 2022-07-14 11:08:50 -05:00