- Switch to Docker 19.03.6
- Switch to Docker 18.06.
- Switch to chrony instead of NTP.
- Enable live restore for Docker daemon.
- Port kubelet and container-runtime health monitor from GCE K8s image.
- Fix DNS resolution for Ubuntu 18.04.
- Use Ubuntu 18.04 as base AMI instead of Amazon Linux 2.
- Use spot instances to build AMI.
- Install awscli from yum instead of pip.
- Install additional diagnostic tools.
- Setup Docker container log rotation.