* A buffered audit backend can be used with other audit backends. ([#60076](https://github.com/kubernetes/kubernetes/pull/60076), [@crassirostris](https://github.com/crassirostris))

  - kube_apiserver_pod_logs_pods_logs_backend_tls_failure_total becomes kube_apiserver_pod_logs_backend_tls_failure_total
  - kube_apiserver_pod_logs_pods_logs_insecure_backend_total becomes kube_apiserver_pod_logs_insecure_backend_total ([#114497](https://github.com/kubernetes/kubernetes/pull/114497), [@dgrisonnet](https://github.com/dgrisonnet))

Before upgrading to Kubernetes 1.13, you must keep the following in mind:

- kube-apiserver

* GCE: Fix for internal load balancer management resulting in backend services with outdated instance group links. ([#62887](https://github.com/kubernetes/kubernetes/pull/62887), [@nicksardo](https://github.com/nicksardo))

## Changelog since v1.8.11

### Other notable changes

* GCE: Fix for internal load balancer management resulting in backend services with outdated instance group links. ([#62887](https://github.com/kubernetes/kubernetes/pull/62887), [@nicksardo](https://github.com/nicksardo))

- Kubectl-convert: Fix `no kind "Ingress" is registered for version` error ([#97754](https://github.com/kubernetes/kubernetes/pull/97754), [@wzshiming](https://github.com/wzshiming))
- Kubectl: Fixed panic when describing an ingress backend without an API Group ([#100505](https://github.com/kubernetes/kubernetes/pull/100505), [@lauchokyip](https://github.com/lauchokyip)) [SIG CLI]

# Changelog since v1.18.6

## Changes by Kind

### Bug or Regression

- Do not add nodes labeled with kubernetes.azure.com/managed=false to backend pool of load balancer. ([#93034](https://github.com/kubernetes/kubernetes/pull/93034), [@matthias50](https://github.com/matthias50)) [SIG Cloud Provider]

fronted by an L7 load balancer that already mitigates these http/2 attacks may choose not to enable the kube-apiserver mitigation to avoid disrupting load balancer → kube-apiserver connections if http/2 requests from multiple clients share the same backend connection. An API server on a private network may choose not to enable the kube-apiserver mitigation to prevent performance regressions for unauthenticated clients. Authenticated requests rely on the fix in golang.org/x/net v0.17.0 alone. https:...

- Print `<default>` as the value in case kubectl describe ingress shows `default-backend:80` when no default backend is present ([#108506](https://github.com/kubernetes/kubernetes/pull/108506), [@jlsong01](https://github.com/jlsong01))

## Changelog since v1.23.12

## Changes by Kind

### Bug or Regression

- Azure: Skip "instance not found" error for LB backend address pools ([#111428](https://github.com/kubernetes/kubernetes/pull/111428), [@lzhecheng](https://github.com/lzhecheng)) [SIG Cloud Provider]