* AWS: Allow cross-region image pulling with ECR ([#24369](https://github.com/kubernetes/kubernetes/pull/24369), [@therc](https://github.com/therc))
* Automatically add node labels beta.kubernetes.io/{os,arch} ([#23684](https://github.com/kubernetes/kubernetes/pull/23684), [@luxas](https://github.com/luxas))

        * `kubernetes.io/hostname`
        * `kubernetes.io/instance-type`
        * `kubernetes.io/os`
        * `kubernetes.io/arch`
        * `beta.kubernetes.io/instance-type`
        * `beta.kubernetes.io/os`
        * `beta.kubernetes.io/arch`
        * `failure-domain.kubernetes.io/zone`
        * `failure-domain.kubernetes.io/region`
        * `failure-domain.beta.kubernetes.io/zone`

* GC pod ips ([#35572](https://github.com/kubernetes/kubernetes/pull/35572), [@bprashanth](https://github.com/bprashanth))
* Stop including arch-specific binaries in kubernetes.tar.gz ([#35737](https://github.com/kubernetes/kubernetes/pull/35737), [@ixdy](https://github.com/ixdy))

- kubelet
  - The `beta.kubernetes.io/os` and `beta.kubernetes.io/arch` labels, deprecated since v1.14, are targeted for removal in v1.18.
  - The `--containerized` flag, deprecated since v1.14, will be removed in a future release.

hear oneself speak--and they don't seem to have any rules in
particular; at least, if there are, nobody attends to them--and
you've no idea how confusing it is all the things being alive;
for instance, there's the arch I've got to go through next
walking about at the other end of the ground--and I should have
croqueted the Queen's hedgehog just now, only it ran away when it
saw mine coming!'

* The Kubelet's --enable-custom-metrics flag is now marked deprecated. ([#54154](https://github.com/kubernetes/kubernetes/pull/54154), [@mtaufen](https://github.com/mtaufen))
* Use multi-arch busybox image for e2e ([#54034](https://github.com/kubernetes/kubernetes/pull/54034), [@dixudx](https://github.com/dixudx))

  - the `--containerized` flag was deprecated in 1.14 and has been removed ([#80043](https://github.com/kubernetes/kubernetes/pull/80043), [@dims](https://github.com/dims))
  - the `beta.kubernetes.io/os` and `beta.kubernetes.io/arch` labels, deprecated since v1.14, are targeted for removal in v1.18.
  - cAdvisor json endpoints have been deprecated since 1.15. ([#78504](https://github.com/kubernetes/kubernetes/pull/78504), [@dashpole](https://github.com/dashpole))