GitOps

GitOps using ArgoCD

Questions: 1. What CI/CD tool is K8TRE going to use? 2. Should the tool deploy and manage applications to the same cluster it is installed on or deploy applications to other clusters? i.e. in-cluster vs cross-cluster architecture? 3. What are the limits of what the CI/CD tool manages?

1. Argo CD.
2. Cross-cluster architecture supports two sub-models: 
    - deployment of K8TRE to dev/test/prod clusters from a single ArgoCD installation
    - deployment of one K8TRE per project or deployment of ephemeral K8TRE development environments for each developer.
3. In the JupyterHub control plane model, JupyterHub is responsible for creating/destroying workspaces, not ArgoCD. ArgoCD will complain that JupyterHub is out-of-sync because of the new resources but there are ways of addressing this.