Install REANA in the cern-vre cluster via tf helm provider

[goseind]

Tasks

Beta Give feedback

1. Lable nodes for HA installation
2. Configure values to use the correct storage
3. Configure HPC backend
4. Configure domain and ingress for access
5. Test workflow run
6. Implement IAM escape indigo authentication REANA cluster reana-cnaf-demo#1
   enhancement +1
   
7. Configure IAM ESCAPE auth with new REANA release

[goseind]

REANA is installed with the values added in PR #35 and accessible under: https://188.185.29.170:30443/signin
Nodes were labeled for HA as described here: https://docs.reana.io/administration/deployment/deploying-at-scale/#high-availability

Reana uses a thorough terraform created share, check the details via openstack share show cvre-reana and get the access id via openstack share access list cvre-reana.

The configuration is still pending, so it won't work yet.

Problems/open topics:

• Installation was done manually (helm install --devel reana-cvre reanahub/reana --wait --version 0.9.0 --values reana/values.yaml -n reana), due to the following unresolved error thrown by terraform: Error: could not download chart: Chart.yaml file is missing
• Create and connect postgres db
• exposing the service via LBaaS to the outside?

[egazzarr]

Reana cluster is accessible on: https://reana-vre.cern.ch/signin with IAM log in. The only thing still needed to do is the HPC connection.