Exporter stops updating

[abrain]

The exporter updates the results from Mozilla Observatory two times and then stops updating. But the exporter still responds to Prometheus' scrapes.

I'm running the exporter inside a Docker container, launched with the following command:
docker run -d --name observatory-exporter --network monitoring --restart always jimdo/observatory-exporter:latest --observatory.target-url <target 1> --observatory.target-url <target 2> --observatory.target-url <target 3>

The log shows the following after startup:

2019/10/28 15:59:12 Exporting result.
2019/10/28 16:00:05 Updated result for <target 1>
2019/10/28 16:00:12 Exporting result.
2019/10/28 16:00:15 Updated result for <target 2>
2019/10/28 16:00:17 Updated result for <target 3>
2019/10/28 16:01:12 Exporting result.
...

Then one hour later (default interval) the results get updated.

2019/10/28 16:59:12 Exporting result.
2019/10/28 17:00:05 Updated result for <target 1>
2019/10/28 17:00:12 Exporting result.
2019/10/28 17:00:14 Updated result for <target 2>
2019/10/28 17:00:14 Updated result for <target 3>
2019/10/28 17:01:12 Exporting result.
...

The rest of the log is only Exporting result., but no Updated result or error. This also happens after deleting and redeploying the container.

Is there some external factor that could cause this behaviour? Because the Docker image f6e275fc88f0 hasn't changed in 2 years and it used to work until earlier this year.

[smon]

Hey @abrain
Thanks for your report and sorry for the late reply.

I checked the official documentation and apparently Timer is only triggering once after the initial run and stops signaling afterward. For a case of triggering 'forever,' one should go with Ticker.

I have no idea what caused the behavior change in this particular case because as you mentioned, the docker image was build years ago. Anyway, this should fix it: #7

(I introduced a small change of behavior, leaving out the initial scrape. This is fixed in #8)

Thanks again and Happy Holidays!

[abrain]

Great, thank you! I'll verify with my setup. Happy holidays to you, too! :)

[abrain]

Running for almost 4 days now, and looks fine :)