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* Self-hosted Kuberntes api-server comes up without a hostname override and detects the hostname it should use from `uname -n` * kube-apiserver name must correspond to routable kubelet hostname-override * Provision /etc/hostname with the FQDN so `uname -n` can be used by Kubernetes (until NODE_NAME is avail. in k8s 1.4)
Examples
These examples network boot and provision machines into CoreOS clusters using bootcfg. You can re-use their profiles to provision your own physical machines.
| Name | Description | CoreOS Version | FS | Docs |
|---|---|---|---|---|
| pxe | CoreOS via iPXE | alpha/1109.1.0 | RAM | reference |
| grub | CoreOS via GRUB2 Netboot | alpha/1109.1.0 | RAM | NA |
| pxe-disk | CoreOS via iPXE, with a root filesystem | alpha/1109.1.0 | Disk | reference |
| etcd | iPXE boot a 3 node etcd cluster and proxy | alpha/1109.1.0 | RAM | reference |
| etcd-install | Install a 3-node etcd cluster to disk | alpha/1109.1.0 | Disk | reference |
| etcd3 | Install a 3-node etcd3 cluster | alpha/1109.1.0 | RAM | None |
| k8s | Kubernetes cluster with 1 master, 2 workers, and TLS-authentication | alpha/1109.1.0 | Disk | tutorial |
| k8s-install | Install a Kubernetes cluster to disk | alpha/1109.1.0 | Disk | tutorial |
| rktnetes | Kubernetes cluster with rkt container runtime, 1 master, workers, TLS auth (known bugs, experimental) | alpha/1122.0.0 | Disk | None |
| bootkube | iPXE boot a self-hosted Kubernetes cluster (with bootkube) | alpha/1109.1.0 | Disk | tutorial |
| bootkube-install | Install a self-hosted Kubernetes cluster (with bootkube) | alpha/1109.1.0 | Disk | tutorial |
| torus | Torus distributed storage | alpha/1109.1.0 | Disk | tutorial |
Tutorials
Get started running bootcfg on your Linux machine to network boot and provision clusters of VMs or physical hardware.
SSH Keys
Most examples allow ssh_authorized_keys to be added for the core user as machine group metadata.
# /var/lib/bootcfg/groups/default.json
{
"name": "Example Machine Group",
"profile": "pxe",
"metadata": {
"ssh_authorized_keys": ["ssh-rsa pub-key-goes-here"]
}
}
Conditional Variables
"pxe"
Some examples check the pxe variable to determine whether to create a /dev/sda1 filesystem and partition for PXEing with root=/dev/sda1 ("pxe":"true") or to write files to the existing filesystem on /dev/disk/by-label/ROOT ("pxe":"false").