matrix-public-archive/server
Eric Eastwood df89750401
Throw more understandable error when we fail to fetch from the homeserver room directory (#84)
Fix https://github.com/matrix-org/matrix-public-archive/issues/80

```
RethrownError: Unable to fetch rooms from room directory (homeserver=http://localhost:8008/)
    searchTerm=, paginationToken=undefined, limit=9
    at matrix-public-archive\server\routes\room-directory-routes.js:55:13
    --- Original Error ---
    Error: HTTP Error Response: 500 Internal Server Error: {"errcode":"M_UNKNOWN","error":"Internal server error"}
        URL=http://localhost:8008/_matrix/client/v3/publicRooms?
        at checkResponseStatus (matrix-public-archive\server\lib\fetch-endpoint.js:21:11)
        at processTicksAndRejections (node:internal/process/task_queues:96:5)
        at async fetchEndpoint (matrix-public-archive\server\lib\fetch-endpoint.js:38:3)
        at async fetchEndpointAsJson (matrix-public-archive\server\lib\fetch-endpoint.js:63:15)
        at async fetchPublicRooms (matrix-public-archive\server\lib\matrix-utils\fetch-public-rooms.js:26:26)
        at async matrix-public-archive\server\tracing\trace-utilities.js:31:24
        at async matrix-public-archive\server\routes\room-directory-routes.js:45:62
```
2022-10-18 16:42:33 -05:00
..
child-process-runner Room directory landing page v1 (#61) 2022-09-08 01:30:04 -05:00
hydrogen-render Sanity check that we are not leaking the access token to the client (#82) 2022-10-18 02:40:40 -05:00
lib Show surrounding messages for a full screen of content (#71) 2022-09-20 16:02:09 -05:00
routes Throw more understandable error when we fail to fetch from the homeserver room directory (#84) 2022-10-18 16:42:33 -05:00
tracing Add domain to tracing service to distinguish different Matrix public archive instances (#76) 2022-10-11 16:03:33 -05:00
README.md Add available Jaeger port (#48) 2022-08-29 14:08:15 -05:00
server.js Enable tracing by config so we can enable from argv, env variable, or config file (#41) 2022-07-14 11:26:53 -05:00
start-dev.js Show surrounding messages for a full screen of content (#71) 2022-09-20 16:02:09 -05:00

README.md

Tracing

Run the app with the OpenTelemetry tracing.

npm run start -- --tracing
# or
npm run start-dev -- --tracing

Manually:

node --require './server/tracing.js' server/server.js

Traces are made up of many spans. Each span defines a traceId which it is associated with.

Viewing traces in Jaeger

via https://www.jaegertracing.io/docs/1.35/getting-started/

docker run -d --name jaeger \
  -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
  -e COLLECTOR_OTLP_ENABLED=true \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 5775:5775/udp \
  -p 16686:16686 \
  -p 4317:4317 \
  -p 4318:4318 \
  -p 14250:14250 \
  -p 14268:14268 \
  -p 14269:14269 \
  -p 9411:9411 \
  jaegertracing/all-in-one:1.35
Port Protocol Component Function
6831 UDP agent accept jaeger.thrift over Thrift-compact protocol (used by most SDKs)
6832 UDP agent accept jaeger.thrift over Thrift-binary protocol (used by Node.js SDK)
5775 UDP agent (deprecated) accept zipkin.thrift over compact Thrift protocol (used by legacy clients only)
5778 HTTP agent serve configs (sampling, etc.)
16686 HTTP query serve frontend
4317 HTTP collector accept OpenTelemetry Protocol (OTLP) over gRPC, if enabled
4318 HTTP collector accept OpenTelemetry Protocol (OTLP) over HTTP, if enabled
14268 HTTP collector accept jaeger.thrift directly from clients
14250 HTTP collector accept model.proto
9411 HTTP collector Zipkin compatible endpoint (optional)

With Service Performance Monitoring (SPM)