Cluster functionality

[XiovV]

Instead of using a personal machine to execute jobs, adding a master node could be a good way to extend the project.

Pros:

• Would allow an opportunity to implement a way to automatically elect a new master node
• Could eliminate the need for an inventory file, as the worker nodes will join the cluster and the master node will be aware of them
• Opportunity to play around with etcd

Cons:

• Might require a big rewrite of the project

Things to consider:

• A way to tell the master node on which nodes to run a job using groups and node names
• If the group or node name is omitted, use a basic algorithm to determine on which node(s) to run the job
• Ingress