examples: Add CoreOS alpha single node PXE example

.dockerignore

@@ -3,3 +3,4 @@ Godeps/
 vendor/
 assets/
 vagrant/
+*.aci

.gitignore

@@ -29,4 +29,3 @@ _testmain.go
 bin/
 assets/
 *.aci
-trustdb.gpg

examples/README.md

@@ -7,7 +7,8 @@ These examples show declarative configurations for network booting libvirt VMs i
 |------------|-------------|----------------|----------------|
 | etcd | Cluster with 3 etcd nodes, 2 proxies | [reference](https://coreos.com/os/docs/latest/cluster-architectures.html) | beta/899.6.0 |
 | Kubernetes | Kubernetes cluster with 1 master, 1 worker, 1 dedicated etcd node | [reference](https://github.com/coreos/coreos-kubernetes) | beta/899.6.0 |
-| etcd on disk | 2-stage Ignition: Install CoreOS, provision etcd cluster | [reference](https://coreos.com/os/docs/latest/installing-to-disk.html) | alpha/962.0.0,935.0.0 |
+| Disk install w etcd | 2-stage Ignition: Install CoreOS, provision etcd cluster | [reference](https://coreos.com/os/docs/latest/installing-to-disk.html) | alpha/962.0.0,935.0.0 |
+| alpha-pxe | PXE CoreOS alpha node, uses configured SSH keys | | alpha/962.0.0 |
 
 ## Experimental
 

examples/alpha-pxe.yaml

@@ -0,0 +1,7 @@
+---
+api_version: v1alpha1
+groups:
+  - name: PXE CoreOS alpha
+    spec: alpha-pxe
+    metadata:
+      ssh_authorized_keys:

examples/ignition/ssh.yaml

@@ -0,0 +1,11 @@
+---
+ignition_version: 1
+{{ if .ssh_authorized_keys }}
+passwd:
+  users:
+    - name: core
+      ssh_authorized_keys:
+        {{ range $element := .ssh_authorized_keys }}
+        - {{$element}}
+        {{end}}
+{{end}}

examples/specs/alpha-pxe/spec.json

@@ -0,0 +1,14 @@
+{
+  "id": "alpha-pxe",
+  "boot": {
+    "kernel": "/assets/coreos/962.0.0/coreos_production_pxe.vmlinuz",
+    "initrd": ["/assets/coreos/962.0.0/coreos_production_pxe_image.cpio.gz"],
+    "cmdline": {
+      "coreos.config.url": "http://bootcfg.foo:8080/ignition?uuid=${uuid}&mac=${net0/mac:hexhyp}",
+      "coreos.autologin": "",
+      "coreos.first_boot": ""
+    }
+  },
+  "cloud_id": "",
+  "ignition_id": "ssh.yaml"
+}