Automated cherry pick of #8727: Add support for Ubuntu 20.04 (Focal)

[hakman]

Cherry pick of #8727 on release-1.16.

#8727: Add support for Ubuntu 20.04 (Focal)

For details on the cherry pick process, see the cherry pick requests page.

[hogepodge]

Would it be possible to include support for 19.10 also?

[hakman]

@hogepodge usually we don't support non-LTS versions of Ubuntu.
Any special reason to add support 19.10?

[hogepodge]

The new Calico eBPF dataplane is being developed and tested against 19.10, which has a supported kernel. I could see how things are working with 20.04 though.

[hakman]

Ah, that makes sense. I read the requirements for the tech preview.
If you could check agains 20.04, would be great. Please let me know how things go.

[hogepodge]

I tried to bring am Ubuntu 20.04 cluster up, using a nightly build, on AWS using the kops/master branch. nodeup fails, saying it found an unknown version of Debian.

[hakman]

@hogepodge that is because it probably uses an old version of NodeUp. By nightly build I guess you mean you built it yourself?
If that is so, you could try running the latest version manually. This builds, uploads and runs it via SSH:

make push-aws-run TARGET=user@host

[geojaz]

/lgtm

[geojaz]

If there's still interest in 19.10 support, I think we can address that in a later PR. thanks @hakman 😎

[geojaz]

/approve

[k8s-ci-robot]

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[hakman]

Thanks @geojaz :)

[hakman]

@hogepodge I checked that latest Kops releases can create a cluster with Ubuntu 20.04 and the bundled Calico v3.13.3. I hope that works ok for the eBPF dataplane also.