* AWS kube-up: set net.ipv4.neigh.default.gc_thresh1=0 to avoid ARP over-caching ([#27682](https://github.com/kubernetes/kubernetes/pull/27682), [@justinsb](https://github.com/justinsb))
* AWS volumes: Use /dev/xvdXX names with EC2 ([#27628](https://github.com/kubernetes/kubernetes/pull/27628), [@justinsb](https://github.com/justinsb))

  * Multiple fixes to EBS volume mounting code for robustness, and to support
mounting the full number of AWS recommended volumes.
  * Multiple fixes to avoid hitting AWS rate limits, and to throttle if we do
  * Support for the EC2 Container Registry (currently in us-east-1 only)

With kube-up:

  * Automatically install updates on boot & reboot
  * Use optimized image based on Jessie by default
  * Add support for Ubuntu Wily

    * OverrideSeparator string Delimiter to use to separate region of occurrence, url and signing region for each override Defaults to ","
    * ServiceOverrides string example: s3|region1, https://s3.foo.bar, some signing_region & ec2|region2, https://ec2.foo.bar, signing_region

- Limit use of tags when calling EC2 API to prevent API throttling for very large clusters. ([#76749](https://github.com/kubernetes/kubernetes/pull/76749), [@mcrute](https://github.com/mcrute))

- github.com/aws/aws-sdk-go-v2/credentials: [v1.17.24](https://github.com/aws/aws-sdk-go-v2/tree/credentials/v1.17.24)
- github.com/aws/aws-sdk-go-v2/feature/ec2/imds: [v1.16.9](https://github.com/aws/aws-sdk-go-v2/tree/feature/ec2/imds/v1.16.9)
- github.com/aws/aws-sdk-go-v2/internal/configsources: [v1.3.13](https://github.com/aws/aws-sdk-go-v2/tree/internal/configsources/v1.3.13)

- Optimize EC2 DescribeInstances API calls in aws cloud provider library by querying instance ID instead of EC2 filters when possible ([#78140](https://github.com/kubernetes/kubernetes/pull/78140), [@zhan849](https://github.com/zhan849))

* Fixed bug in AWS provider to handle multiple IPs when using more than 1 network interface per ec2 instance. ([#50112](https://github.com/kubernetes/kubernetes/pull/50112), [@jlz27](https://github.com/jlz27))

* Fixed bug in AWS provider to handle multiple IPs when using more than 1 network interface per ec2 instance. ([#50112](https://github.com/kubernetes/kubernetes/pull/50112), [@jlz27](https://github.com/jlz27))

  
  ### AliCloud
  - Add missing daemonsets and replicasets to ALI example cluster role
  
  ### Apache CloudStack
  - Add support for Apache CloudStack
  
  ### AWS
  - Regenerate list of EC2 instances
  - Fix pricing endpoint in AWS China Region
  
  ### Azure
  - Add optional jitter on initial VMSS VM cache refresh, keep the refreshes spread over time

  
  ### AliCloud
  - Add missing daemonsets and replicasets to ALI example cluster role
  
  ### Apache CloudStack
  - Add support for Apache CloudStack
  
  ### AWS
  - Regenerate list of EC2 instances
  - Fix pricing endpoint in AWS China Region
  
  ### Azure
  - Add optional jitter on initial VMSS VM cache refresh, keep the refreshes spread over time