Kubernetes Solution Update: Allow 3-Masters (and more) Deployment

[mik-tf]

Which package/s are you suggesting this feature for?

Dashboard

Is your feature request related to a problem? Please describe

As discussed with Thabet and Scott, the current dashboard Kubernetes currently allows only for 1-master deployment, and updating it to allow for 3-masters and more would allow for HA on the grid for apps.

Describe the solution you'd like

We propose to update the Kubernetes solution to allow for deployments with 3-masters (and more).

I.e., we want multiple master deployments for Kubernetes. 3 masters is generally considered a good starting point for HA.

This will enable high availability for apps on the grid.

Proposition of Configurations

• Minimum: 3 masters, 3 workers
• Basic: 3 masters, 3-5 workers
• Advanced: 5 masters, 5-20 workers

The basic configuration would be a good start.

Link with GlusterFS + CSI

I think we can add container storage interface (CSI) with GlusterFS to allow for HA for app (kubernetes) and HA for storage (glusterFS). Might be for a separate issue once GlusterFS is done on Dashboard too (feature request: #3759)

[mik-tf]

As discussed with Thabet and Kristof, we will first start by having guides instead of dashboard solutions.