Support for multi node in shared mode

[galal-hussein]

The PR adds the following:

• Converting the shared agent deployment to deamonset so that it can be scheduled on all nodes of the host cluster

• Using the cluster.Spec.NodeSelector to only schedule the pods of the agent daemonset to specific nodes selected by the user

• Using leader election for controllers running by the k3k-kubelet

• Refactoring the PV/PVC support by:

  • for each pod that consumes a pvc, we create a fake PV (pseudoPV) in the virtual cluster to simulate persistent volume, this will enable the pod to be picked up (scheduled) by the virtual-kubelet and then created on the host cluster

• [EPIC]Support multiple nodes (agents) in shared mode #167

[enrichman]

A couple of small comments, maybe we need to go through all the logging part to define a coding style.

[galal-hussein]

A couple of small comments, maybe we need to go through all the logging part to define a coding style.

Will fix, yeah I think the logging should be standardized throughout the repo.

[enrichman]

LGTM! Thanks, great work 👏