[DEBIAN Base] Possibly Fix Random Down, DNS Timeout, EAGAIN, EAI_AGAIN

If you are experiencing such issues, it is worth to try this debian base docker image, and let me know whether it is solved. Thank you!

Docker Image

uptime-kuma:1.5.3-debian

Story:

There were some Uptime Kuma users who were facing weird connectivity problems which I cannot explain. #114 #274 #220

Recently, one of our contributions @chakflying found out that it may be related to Alpine Docker which Uptime Kuma is based on it. https://github.com/louislam/uptime-kuma/issues/294#issuecomment-909353979

https://github.com/gliderlabs/docker-alpine/issues/255

[ovizii]

I did resolve it successfully though by ensuring kuma was going directly to my DNS server by setting DNS on the container instead of requests going through the docker gateway.

Just in case someone else wants to try this, I manually added these dns servers to uptime-kuma’s docker-compose.yml file and my response times have also gone down.

    dns:
      - 1.1.1.1
      - 9.9.9.9
      - 8.8.8.8

[louislam]

Thank you for you guys’ reports. Combining the reports here and the similar reports from the Internet, I am pretty sure Alpine Linux is having some kind of dns problem that they are not going to fix.

Plus, armv7 error in Alpine Linux >= 3.13, 3.14 (#41), I am going to fade out Alpine Linux in the next release.

If you are a developer in any other projects and to future me, my advice is that you should keep away from Alpine Linux. Imagine that your application need to call payment gateway API such as Paypal and it throws EAI_AGAIN randomly, that could be a disaster.