* Update Fedora CoreOS live PXE and disk install examples to
Fedora 33
* Increase libvirt VM memory from 2GB to 3GB to support live
PXE example, which is mostly just for laptop examples/demos.
Reduce the VM count from 3 to 2 to compensate.
* Change `fedora-coreos.ign` to suggest using an ed25519 SSH
key since Fedora CoreOS 33 disables RSA SHA1 (256 is still ok
but most people won't know which they have)
* Update Terraform examples to use Terraform v0.13
* Refresh examples to show Fedora CoreOS and Flatcar Linux
* Remove the etcd3 example, not worth it to maintain
* Refactor examples to boot provision minimal hosts
with Fedora CoreOS or Flatcar Linux
* Remove the etcd3 cluster example or other specific
kinds of hosts
* Update script get-fedora-coreos
* Remove script get-coreos
* Matchbox examples should be simple and educational to
show how to PXE provision machines into clusters. Today,
these goals are achieved well enough by the 3-node etcd
cluster example
* Several years ago, I put together examples PXE booting
Kubernetes clusters with Matchbox. That was before we wrote
Tectonic or Kubernetes was as popular as it is. Today, a
Kubernetes distro is a project in its own right. It no
longer makes sense to maintain (duplicate) a Kubernetes
distro as "an example" inside Matchbox.
* Matchbox is now used for Kubernetes cluster provisioning in
more organizations than ever. It backs the poseidon/Typhoon and
kinvolk/Locomotive distros. These both serve as great external
examples of using Matchbox to provision Kubernetes clusters
Attention: If you relied on Matchbox Kubernetes docs, you can
find a similar guide at https://typhoon.psdn.io/cl/bare-metal/
(same author). https://github.com/poseidon/typhoon/
* Local QEMU/KVM tutorials use either docker or rkt/acbuild,
but they're dated. rkt and acbuild are no longer in mainstream
use since they successfully drove OCI standardization
* Remove the rkt examples, as they are just more difficult for
newcomers to use and seldom maintained at this point
* Retain Docker examples, although podman will likely supplant
all docker usage in future
* Define the required versions of terraform-provider-matchbox
and terraform-provider-ct, with install instructions
* Refresh the tutorial for using Matchbox to PXE boot local
QEMU/KVM machines (using Terraform as a client)
* Add ipxe.efi to dnsmasq image's /var/lib/tftpboot directory
* Add initrd kernel argument respected only by UEFI
https://github.com/coreos/bugs/issues/1239
* Improve network-setup docs and scripts to cover UEFI clients
and to support launching UEFI QEMU/KVM clusters locally
* Reduce references to grub.efi flow, its not a happy path
* Upstream fixes to bump all control plane components to v1.7.5
* Stop including etcd-network-checkpointer with on-host etcd
* Remove experimental_self_hosted_etcd support
* Mount host /opt/cni/bin in Kubelet to use host's CNI plugins
* Switch /var/run/kubelet-pod.uuid to /var/cache/kubelet-pod.uuid
to persist between reboots and cleanup old Kubelet pods
* Organize Kubelet flags in alphabetical order
etcd examples set ETCDCTL_API=3 but are using v2 etcdctl commands. This
works on CL by accident because it ships with 2.3 so etcdctl doesn't
recognize the API env var.
