dosubot[bot] commented on issue #7549:
URL:
https://github.com/apache/incubator-devlake/issues/7549#issuecomment-2140864982
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<!-- Answer -->
To resolve the issue of failed WebSocket connections to the `/api/live/ws`
endpoint on `localhost:4000`, follow these steps:
1. **Check WebSocket Configuration in Grafana**:
Ensure that the Grafana service is configured to allow WebSocket
connections. The `GF_LIVE_ALLOWED_ORIGINS` environment variable should be set
to `'*'` to allow connections from any origin.
2. **Network Configuration**:
Verify that there are no firewall rules or network policies blocking
WebSocket traffic. Since the `config-ui` service is mapped to `localhost:4000`,
ensure that this port is open and accessible.
3. **Service Dependencies**:
Confirm that all dependent services are running correctly. The
`config-ui` service depends on the `devlake` service, which in turn depends on
the `mysql` service. Ensure all these services are up and running without
errors.
4. **Browser Console**:
Check the browser console for any error messages related to WebSocket
connections. This can provide more specific information about why the
connection is failing.
5. **WebSocket Endpoint**:
Test the WebSocket endpoint `/api/live/ws` using a WebSocket client or a
simple script. Here is an example of how you can test the WebSocket connection
using a JavaScript snippet in the browser console:
```javascript
let socket = new WebSocket("ws://localhost:4000/api/live/ws");
socket.onopen = function(e) {
console.log("[open] Connection established");
};
socket.onmessage = function(event) {
console.log(`[message] Data received from server: ${event.data}`);
};
socket.onclose = function(event) {
if (event.wasClean) {
console.log(`[close] Connection closed cleanly, code=${event.code}
reason=${event.reason}`);
} else {
console.log('[close] Connection died');
}
};
socket.onerror = function(error) {
console.log(`[error] ${error.message}`);
};
```
If the connection is successful, you should see the "Connection established"
message in the console. If there are errors, the error message will provide
more details on what might be going wrong.
By following these steps, you should be able to identify and resolve the
issue with the WebSocket connections to the `/api/live/ws` endpoint on
`localhost:4000`
<sup>[[1]](https://github.com/apache/incubator-devlake/blob/main/devops/releases/lake-v0.10.1/docker-compose.yml)</sup><sup>[[2]](https://github.com/apache/incubator-devlake/blob/main/devops/releases/lake-v0.10.0/docker-compose.yml)</sup>.
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