The main milestones for SIG Network this release are the graduation of IPVS-based load balancing and CoreDNS to general availability.

IPVS is an alternative approach to in-cluster load balancing that uses in-kernel hash tables rather than the previous iptables approach, while CoreDNS is a replacement for kube-dns for service discovery.

### SIG Node

SIG-Node advanced several features and made incremental improvements in a few key topic areas this release.

  - Use of the `--node-labels` flag to set labels under the `kubernetes.io/` and `k8s.io/` prefix will be subject to restriction by the `NodeRestriction` admission plugin in future releases. [See admission plugin documentation](https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#noderestriction) for allowed labels. ([#68267](https://github.com/kubernetes/kubernetes/pull/68267), [@liggitt](https://github.com/liggitt))...

- Update `kube-proxy` base image `debian-iptables` to v1.6.2 to pickup [documentation](https://github.com/kubernetes/release/pull/2106)
  \n"- `debian-iptables`: select nft mode if ntf lines > legacy lines, matching [iptables-wrappers](https://github.com/kubernetes-sigs/iptables-wrappers/)" ([#102590](https://github.com/kubernetes/kubernetes/pull/102590), [@BenTheElder](https://github.com/BenTheElder))

- [`KT-55828`](https://youtrack.jetbrains.com/issue/KT-55828) [K2/N]: Fix test fails in OPT mode : `Internal compiler error: no implementation found ... when building itable/vtable`
- [`KT-56169`](https://youtrack.jetbrains.com/issue/KT-56169) False negative deprecation warning about future inference error with builder inference

  - cAdvisor json endpoints have been deprecated since 1.15. ([#78504](https://github.com/kubernetes/kubernetes/pull/78504), [@dashpole](https://github.com/dashpole))

- Updated distroless I-tables to use registry.k8s.io/build-image/distroless-iptables:v0.2.5 ([#118541](https://github.com/kubernetes/kubernetes/pull/118541), [@jeremyrickard](https://github.com/jeremyrickard)) [SIG Testing]

- The kubelet now creates an iptables chain named `KUBE-IPTABLES-HINT` in
  the `mangle` table. Containerized components that need to modify iptables
  rules in the host network namespace can use the existence of this chain
  to more-reliably determine whether the system is using iptables-legacy or

## Changelog since v1.20.12

## Changes by Kind

### Feature

- Update debian-base, debian-iptables, setcap images to pick up CVE fixes
  - Debian-base to v1.9.0
  - Debian-iptables to v1.6.7 (#106148, @cpanato) [SIG Release and Testing]

### Failing Test

- Fixes hostpath storage e2e tests within SELinux enabled env (#105788, @Elbehery) [SIG Testing]

- Graduating `pending_pods`, `preemption_attempts_total`, `preemption_victims` and `schedule_attempts_total` metrics to stable. Also `e2e_scheduling_duration_seconds` is renamed to `scheduling_attempt_duration_seconds` and the latter is graduated to stable. (#105941, @rezakrimi) [SIG Instrumentation, Scheduling and Testing]

    - [Promoted endPort in Network Policy to Stable](#promoted-endport-in-network-policy-to-stable)
    - [Promoted Local Ephemeral Storage Capacity Isolation to Stable](#promoted-local-ephemeral-storage-capacity-isolation-to-stable)
    - [Promoted core CSI Migration to Stable](#promoted-core-csi-migration-to-stable)
    - [Promoted CSI Ephemeral Volume to Stable](#promoted-csi-ephemeral-volume-to-stable)