storage class and ingress controller

[jeanclei]

Added storage class and ingress controller via cloudinit

[jeanclei]

@jpetazzo , @fserve
I thoroughly tested the Ingress Controller nginx functionality with metallb, I put the master's public IP to the internet, and what happens is that when I access the master's public IP, it routes it to one of the nodes that will serve with Ingress Controller because one of the nodes is chosen by metallb to be the leader. then I turned off the node that had the IP allocated in the ingress, (see with "kubectl get ing") and I realized that it takes on average 6 minutes for metallb to notice the failure and choose another node to be the leader. despite this high time for failover, I thought it was great to be able to use the nginx ingress controller on the bare metal cluster!

As for the longhorn, it's amazing!

[jeanclei]

I'm thinking of adding a network load balancing that is also free, so that the master doesn't have the public IP so exposed.