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Virtlet pod example

In order to try out the example, do the following on a cluster that has nodes with Virtlet on it (see the instructions in deploy/ directory):

  1. Create a sample VM:
kubectl create -f cirros-vm.yaml
  1. Wait for cirros-vm pod to become Running:
kubectl get pods -w
  1. Connect to the VM console:
kubectl attach -it cirros-vm
  1. As soon as the VM has booted, you can use the vmssh.sh script to access it using ssh:
./vmssh.sh cirros@cirros-vm [command...]

Besides cirros-vm.yaml, there's also ubuntu-vm.yaml that can be used to start an Ubuntu Xenial VM. It can also be accessed using vmssh.sh after it boots:

./vmssh.sh root@ubuntu-vm [command...]

Another way to access a vm is to use virsh.sh tool. It can be used to access a vm only when logging is disabled. See vm-logging for more details. You can list libvirt domains with virsh.sh:

./virsh.sh list

And then connect to console:

$ ./virsh.sh console @cirros-vm
Connected to domain 411c70b0-1df3-46be-4838-c85474a1b44a-cirros-vm
Escape character is ^]
login as 'cirros' user. default password: 'gocubsgo'. use 'sudo' for root.
cirros-vm login: cirros
Password:
$

Kubernetes on VM-based StatefulSet

Another example involves starting several VMs using StatefulSet and deploying Kubernetes using kubeadm on it.

You can create the cluster like this:

kubectl create -f k8s.yaml

Watch progress of the cluster setup via the VM console:

kubectl attach k8s-0

After it's complete you can log into the master node:

./vmssh.sh k8s-0

There you can wait a bit for k8s nodes and pods to become ready. You can list them using the following commands inside the VM:

kubectl get nodes -w
kubectl get pods --all-namespaces -o wide -w

After that you can follow the instructions to install Virtlet on the cluster, but note that you'll have to disable KVM because nested virtualization is not yet supported by Virtlet.