- Handle slow CronJob lister in CronJob controller v2 and improve memory footprint. ([#96443](https://github.com/kubernetes/kubernetes/pull/96443), [@alaypatel07](https://github.com/alaypatel07)) [SIG Apps]
- --redirect-container-streaming is no longer functional. The flag will be removed in v1.22 ([#95935](https://github.com/kubernetes/kubernetes/pull/95935), [@tallclair](https://github.com/tallclair)) [SIG Node]

pkg syscall (freebsd-arm64), const O_ASYNC = 64
pkg syscall (freebsd-arm64), const O_CLOEXEC = 1048576
pkg syscall (freebsd-arm64), const O_CREAT = 512
pkg syscall (freebsd-arm64), const O_DIRECT = 65536
pkg syscall (freebsd-arm64), const O_DIRECT ideal-int
pkg syscall (freebsd-arm64), const O_DIRECTORY = 131072
pkg syscall (freebsd-arm64), const O_DIRECTORY ideal-int
pkg syscall (freebsd-arm64), const O_EXCL = 2048

pkg syscall (netbsd-arm64-cgo), const O_CREAT = 512
pkg syscall (netbsd-arm64-cgo), const OCRNL = 16
pkg syscall (netbsd-arm64-cgo), const OCRNL ideal-int
pkg syscall (netbsd-arm64-cgo), const O_DIRECT = 524288
pkg syscall (netbsd-arm64-cgo), const O_DIRECT ideal-int
pkg syscall (netbsd-arm64-cgo), const O_DIRECTORY = 2097152
pkg syscall (netbsd-arm64-cgo), const O_DIRECTORY ideal-int
pkg syscall (netbsd-arm64-cgo), const O_DSYNC = 65536

- client-go releases will no longer have bootstrap (k8s.io/client-go/tools/bootstrap) related code. Any reference to it will break. Please redirect all references to k8s.io/bootstrap instead. ([#67356](https://github.com/kubernetes/kubernetes/pull/67356), [@yliaog](https://github.com/yliaog))

pkg syscall (freebsd-386-cgo), const ONOEOT ideal-int
pkg syscall (freebsd-386-cgo), const OPOST ideal-int
pkg syscall (freebsd-386-cgo), const O_ACCMODE ideal-int
pkg syscall (freebsd-386-cgo), const O_DIRECT ideal-int
pkg syscall (freebsd-386-cgo), const O_DIRECTORY ideal-int
pkg syscall (freebsd-386-cgo), const O_EXEC ideal-int
pkg syscall (freebsd-386-cgo), const O_EXLOCK ideal-int

- Kube-apiserver: redirect responses are no longer returned from backends by default. Set `--aggregator-reject-forwarding-redirect=false` to continue forwarding redirect responses. ([#112331](https://github.com/kubernetes/kubernetes/pull/112331), [@enj](https://github.com/enj)) [SIG API Machinery]

### (No, really, you MUST read this before you upgrade)

- The StreamingProxyRedirects feature and `--redirect-container-streaming` flag are deprecated, and will be removed in a future release. The default behavior (proxy streaming requests through the kubelet) will be the only supported option.

pkg syscall (freebsd-386), const O_APPEND = 8
pkg syscall (freebsd-386), const O_ASYNC = 64
pkg syscall (freebsd-386), const O_CLOEXEC = 0
pkg syscall (freebsd-386), const O_CREAT = 512
pkg syscall (freebsd-386), const O_DIRECT = 65536
pkg syscall (freebsd-386), const O_DIRECTORY = 131072
pkg syscall (freebsd-386), const O_EXCL = 2048
pkg syscall (freebsd-386), const O_EXEC = 262144
pkg syscall (freebsd-386), const O_EXLOCK = 32

lue":"500"},{"key":"transition_workers","value":"100"},{"key":"stale_uploads_cleanup_interval","value":"6h"},{"key":"stale_uploads_expiry","value":"24h"},{"key":"delete_cleanup_interval","value":"5m"},{"key":"disable_odirect","value":""},{"key":"odirect","value":"on"},{"key":"gzip_objects","value":"off"},{"key":"root_access","value":"on"},{"key":"sync_events","value":"off"},{"key":"object_max_versions","value":"9223372036854775807"}]},"audit_kafka":{"_":[{"key":"enable","value":"off"},{"key":"to...

* Use "k8s.gcr.io" for container images rather than "gcr.io/google_containers".  This is just a redirect, for now, so should not impact anyone materially.   ([#54174](https://github.com/kubernetes/kubernetes/pull/54174), [@thockin](https://github.com/thockin))