examples/rktnetes: Update to CoreOS Beta 1185.1.0

[dghubble]

• rkt v1.14.0 is needed for rktnetes
• Validated via QEMU/KVM PXE boot
• Validated on lab hardware https://github.com/dghubble/metal/commit/68ac004a2345d04f4577f818f5765b8a0487114c (actually CoreOS Alpha 1192.0.0)

closes #353

[crawford]

coreos/bugs#1600

[dghubble]

Looks like that's for AWS, are there expected issues on bare-metal in Alpha 1192.0.0?

[dghubble]

Hm, I do have issues with the PXE image in QEMU/KVM (/dev/sda1 does not exist). Let's use CoreOS beta for now since it has rkt v1.14.0 too.

[crawford]

No expected issues. Can you file a bug?

[dghubble]

Yep, lemme collect some info and test some other examples.

[dghubble]

A rktnetes cluster with CoreOS Beta 1185.1.0,

kubectl get pods --all-namespaces
NAMESPACE     NAME                                        READY     STATUS    RESTARTS   AGE
kube-system   heapster-v1.2.0-4088228293-nfqyo            2/2       Running   0          11m
kube-system   kube-apiserver-node1.example.com            1/1       Running   0          11m
kube-system   kube-controller-manager-node1.example.com   1/1       Running   0          11m
kube-system   kube-dns-v19-bj1m8                          3/3       Running   0          12m
kube-system   kube-proxy-node1.example.com                1/1       Running   0          11m
kube-system   kube-proxy-node2.example.com                1/1       Running   0          15s
kube-system   kube-proxy-node3.example.com                1/1       Running   0          11m
kube-system   kube-scheduler-node1.example.com            1/1       Running   0          11m
kube-system   kubernetes-dashboard-v1.4.0-q3z3b           1/1       Running   1          12m