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
We now run the Hydrogen render in a `child_process` so we can exit the whole render process. We still use the `vm` to setup the browser-like globals. With a `vm`, everything continues to run even after it returns and there isn't a way to clean up, stop, kill, terminate the vm script or context so we need this extra `child_process` now to clean up. I don't like the complexity necessary for this though. I wish the `vm` API allowed for this use case. The only way to stop a `vm` is the `timeout` and we want to stop as soon as we return.
Fix https://github.com/matrix-org/matrix-public-archive/issues/34
`renderHydrogenToString` is a pure function (probably) which means it will give the same output given the same input. This means, that if we give it a certain input and an error occurs, we should be able to reproduce it again if we have the arguments. This PR exposes those arguments in the logged error so we can investigate what's going wrong.
Added so we can investigate https://github.com/matrix-org/matrix-public-archive/issues/34 better and reproduce locally.
Fix image not running in K8s (ROSA)
Trying to solve the container exiting with error code `243`. `npm` throws `243` for any command you try to run with it.
Here is how to get into the container while the entrypoint normally errors.
```
$ oc run -i --tty --image=ghcr.io/matrix-org/matrix-public-archive/matrix-public-archive:sha-65edaea1a9713bb2cc93fa98638327fdeff765cd mpa-test2 --port=3050 --restart=Never --env="DOMAIN=cluster" --command /bin/bash
$ npm start
$ echo $?
243
```
Why does the same image work in Docker?
```
$ docker run -it --entrypoint /bin/bash ghcr.io/matrix-org/matrix-public-archive/matrix-public-archive:sha-65edaea1a9713bb2cc93fa98638327fdeff765cd
$ npm start
# it starts ✅
```
## Root cause
Seems like it could be either of these issues. Both are `8.6.0`+ problems as well which lines up with the `npm` version available in each base image.
- https://github.com/npm/cli/issues/4769
- https://github.com/npm/cli/issues/4996
- Specific comment about breaking stuff in k8s for other people, https://github.com/npm/cli/issues/4996#issuecomment-1150290804
Easy get the app running steps:
1. Install
2. Edit the config to point at your homeserver
3. Run the app!
---
This is made possible thanks to the change we made in https://github.com/matrix-org/matrix-public-archive/pull/20#discussion_r897567619 to start using a scoped custom version of `hydrogen-view-sdk`. This includes all of the scratch changes necessary to get this project running which makes the `npm install` just work out of the box without all of the `npm link` hassle.
1. Build test homeserver Docker images which can federate with each other
2. Run end-to-end (e2e) tests
#### Dev notes
Sharing variables across jobs when the `services` field can't access the `env` context, https://github.community/t/how-to-use-env-with-container-image/17252/24
```yaml
env:
FOO: bar
jobs:
set_env:
outputs:
var: ${{ steps.save_var.outputs.var }}
steps:
- id: save_var
run: echo "::set-output name=var::${{ env.FOO }}"
actual_job:
needs: set_env
container:
image: ...whatever_you_need_here...${{ needs.set_env.outputs.var }}
```
Remove `matrix-bot-sdk` usage in tests because it didn't have timestamp massaging `?ts` and it's not really necessary to rely on since we can just call the API directly 🤷. `matrix-bot-sdk` is also very annoying having to build rust crypto packages.
We're now using direct `fetch` requests against the Matrix API and lightweight `client` object.
All 3 current tests pass ✅
Get this project running again after a few months of changes
from `hydrogen-view-sdk` and now finally after
https://github.com/vector-im/hydrogen-web/pull/693
merged to make the SDK friendly to locally link and develop on.
Because we had to update the `assets` `export` to avoid the following deprecation warning:
```
(node:133896) [DEP0148] DeprecationWarning: Use of deprecated folder mapping "./assets/" in the "exports" field module resolution of the package at C:\Users\MLM\Documents\GitHub\element\matrix-public-archive\node_modules\hydrogen-view-sdk\package.json.
Update this package.json to use a subpath pattern like "./assets/*".
(Use `node --trace-deprecation ...` to show where the warning was created)
```
`hydrogen-view-sdk` `package.json` before:
```json
{
"exports": {
".": {
"import": "./lib-build/hydrogen.es.js",
"require": "./lib-build/hydrogen.cjs.js"
},
"./paths/vite": "./paths/vite.js",
"./style.css": "./style.css",
"./assets/": "./asset-build/assets/"
}
}
```
`hydrogen-view-sdk` `package.json` after:
```json
{
"exports": {
".": {
"import": "./lib-build/hydrogen.es.js",
"require": "./lib-build/hydrogen.cjs.js"
},
"./paths/vite": "./paths/vite.js",
"./style.css": "./style.css",
"./assets/*": "./asset-build/assets/*"
}
}
```
Eric Eastwood
