Deployment on Edge Nodes with Ubuntu 20.04

[oEscal]

On this pull request we changed the playbooks in order to deploy OpenNESS in environments with Edge Nodes with Ubuntu 20.04 installed. It is important to notice that the deployment for nodes and controller with CentOS 7.9 still works.

We tested the deployment for the minimal flavor and with (and without) the deployment of the Istio service mesh in the following environment:

• 1 Controller Node (with CentOS 7.9):
  • RAM: 16GB
  • CPU: 8 VCPUs
• 1 Edge Node (with Ubuntu 20.04):
  • RAM: 10GB
  • CPU: 4 VCPUs

Note that there are some Python2 packages installed by the original playbook roles/infrastructure/docker/tasks/main.yml that are no longer maintained or with versions that are very old. We were not able to install some of them using pip and therefore we tried to find them in other Debian repositories.

Part of this work was done in collaboration with Miguel Mota.