* Upgrade to etcd client 3.3.17 to fix bug where etcd client does not parse IPv6 addresses correctly when members are joining, and to fix bug where failover on multi-member etcd cluster fails certificate check on DNS mismatch ([#83968](https://github.com/kubernetes/kubernetes/pull/83968), [@jpbetz](https://github.com/jpbetz))

* Add automatic etcd 3.2->3.1 and 3.1->3.0 minor version rollback support to gcr.io/google_container/etcd images. For HA clusters, all members must be stopped before performing a rollback. ([#59298](https://github.com/kubernetes/kubernetes/pull/59298), [@jpbetz](https://github.com/jpbetz))

dbMask. mgf1XOR(db, hash, h) // 11. Set the leftmost 8 * emLen - emBits bits of the leftmost octet in // maskedDB to zero. db[0] &= 0xff >> (8*emLen - emBits) // 12. Let EM = maskedDB || H || 0xbc. em[emLen-1] = 0xbc // 13. Output EM. return em, nil } const pssSaltLengthAutodet = -1 func emsaPSSVerify(mHash, em []byte, emBits, sLen int, hash fips140.Hash) error { // See RFC 8017, Section 9.1.2. hLen := hash.Size() emLen := (emBits + 7) / 8 if emLen != len(em) { return errors.New("rsa: internal error:...

- Kubeadm: increase robustness for "kubeadm join" when adding etcd members on slower setups ([#90645](https://github.com/kubernetes/kubernetes/pull/90645), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

* Add automatic etcd 3.2->3.1 and 3.1->3.0 minor version rollback support to gcr.io/google_container/etcd images. For HA clusters, all members must be stopped before performing a rollback. ([#59298](https://github.com/kubernetes/kubernetes/pull/59298), [@jpbetz](https://github.com/jpbetz))

- Kubeadm: fix a bug where "kubeadm join" would not properly handle missing names for existing etcd members. ([#97372](https://github.com/kubernetes/kubernetes/pull/97372), [@ihgann](https://github.com/ihgann)) [SIG Cluster Lifecycle]

atsuma.hokkaido.jp
bibai.hokkaido.jp
biei.hokkaido.jp
bifuka.hokkaido.jp
bihoro.hokkaido.jp
biratori.hokkaido.jp
chippubetsu.hokkaido.jp
chitose.hokkaido.jp
date.hokkaido.jp
ebetsu.hokkaido.jp
embetsu.hokkaido.jp
eniwa.hokkaido.jp
erimo.hokkaido.jp
esan.hokkaido.jp
esashi.hokkaido.jp
fukagawa.hokkaido.jp
fukushima.hokkaido.jp
furano.hokkaido.jp
furubira.hokkaido.jp
haboro.hokkaido.jp

This release shouldn't affect apps using FastAPI in any way. You don't even have to upgrade to this version yet. It's just a checkpoint. 🤓

### Refactors

### SIG-ibmcloud

As a newly created SIG, the SIG-ibmcloud has mainly focused on SIG set up, sharing IBM Clouds ongoing Kubernetes work like scalability tests, Kubernetes upgrade strategy etc. with the SIG members and start working on processes to move cloud provider code to a public GitHub repo.

### SIG-instrumentation

No feature work, but a large refactoring of metrics-server as well as a number of bug fixes.

- Kubeadm: when adding new control plane nodes with "kubeadm join", ensure that the etcd member addition is performed only if a given member URL does not already exist in the list of members. Similarly, on "kubeadm reset" only remove an etcd member if its ID exists. ([#127619](https://github.com/kubernetes/kubernetes/pull/127619), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]