Bump ubuntu base image in endpoint image

[tatsuhiro-t]

simulator image got a upgrade to use ubuntu 22.04, but endpoint image is still 20.04.
Is there any chance to upgrade the base image of endpoint Dockerfile to 22.04 as well?

[marten-seemann]

I hope this would be fine, but I'm wondering if we'd be breaking people's builds.

[tatsuhiro-t]

I built ngtcp2 interop image with custom entrypoint image as ubuntu 22.04 base, and all interop tests succeeded except for A which has a known issue (see quic-interop/quic-interop-runner#376).

but I'm wondering if we'd be breaking people's builds.

We can change the image name or tag, like:

• martenseemann/quic-network-simulator-endpoint:ubuntu-22.04
• martenseemann/quic-network-simulator-endpoint-v2:latest

etc

and tell people that old image will not get any update, and they should migrate their image to use new image.
What do you think about this?