- `kube-apiserver` updated:

    - `apiserver_flowcontrol_upper_limit_seats`: Configured upper bound on number of execution seats available to each priority level
    - `apiserver_flowcontrol_demand_seats`: Observations, at the end of every nanosecond, of (the number of seats each priority level could use) / (nominal number of seats for that level)
    - `apiserver_flowcontrol_demand_seats_high_watermark`: High watermark, over last adjustment period, of demand_seats

          <type>String</type>
        </field>
        <field>
          <description>
            <![CDATA[
            <p>The configuration as DOM object.</p>
            <p>By default, every element content is trimmed, but starting with Maven 3.1.0, you can add
            {@code xml:space="preserve"} to elements you want to preserve whitespace.</p>

* Enable lazy inode table and journal initialization for ext3 and ext4 ([#38865](https://github.com/kubernetes/kubernetes/pull/38865), [@codablock](https://github.com/codablock))
* Kubelet will no longer set hairpin mode on every interface on the machine when an error occurs in setting up hairpin for a specific interface. ([#36990](https://github.com/kubernetes/kubernetes/pull/36990), [@bboreham](https://github.com/bboreham))

architecture doesn't have a way to turn off AES support // at runtime with GODEBUG=cpu.something=off, so introduce a new GODEBUG // knob for that. It's intentionally only checked at init() time, to // avoid the performance overhead of checking it every time. if godebug.Value("#ppc64aes") == "off" { supportsAES = false } impl.Register("aes", "POWER8", &supportsAES) } } // checkGenericIsExpect is called by the variable-time implementation to make // sure it is not used when hardware support is available....

* new dhcp-domain parameter to be used for figuring out the hostname of a node ([#61890](https://github.com/kubernetes/kubernetes/pull/61890), [@dims](https://github.com/dims))
* Disable ipamperf integration tests as part of every PR verification. ([#61863](https://github.com/kubernetes/kubernetes/pull/61863), [@satyasm](https://github.com/satyasm))

### Kubernetes Node system swap support

* Adds the Categories []string field to API resources, which represents the list of group aliases (e.g. "all") that every resource belongs to. ([#43338](https://github.com/kubernetes/kubernetes/pull/43338), [@fabianofranz](https://github.com/fabianofranz))

- Fix kubelet NodeLease potential performance issues. Kubelet now will try to update lease using cached one instead of get from API Server every time. ([#81174](https://github.com/kubernetes/kubernetes/pull/81174), [@answer1991](https://github.com/answer1991))

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