Kubeadm: Update the 1.15 documentation

[neolit123]

tracking issue for 1.15 docs updates.

PRs:

• [x] setup: https://github.com/kubernetes/website/pull/14594
• [x] tasks: https://github.com/kubernetes/website/pull/14595
• [x] reference: https://github.com/kubernetes/website/pull/14596
• [x] v1beta2: https://github.com/kubernetes/website/pull/14607 (@rosti)
• [x] cert management: https://github.com/kubernetes/website/pull/14716 (@fabriziopandini @jimangel)

deadline for placeholders is the 31st
deadline for final docs is the 4th
https://github.com/kubernetes/sig-release/tree/master/releases/release-1.15#timeline

[yagonobre]

@neolit123 do these prs include the changes on reset phase?

[neolit123]

yes

[RA489]

@neolit123 please include me in for some of the PRs

[SataQiu]

I am happy to be involved too. :laughing:

[neolit123]

it's OK, this cycle we're are pressed for time after kubecon, so i will try managing all (most) of the doc PRs.
thanks.

[RA489]

@neolit123 np, let me me if i can help with some other PRs

[neolit123]

all documentation PRs have merged.
will keep this open until release.

[neolit123]

we are done here.

[fabriziopandini]

@neolit123 thanks for coordinating this effort