cluster03: Proof of Concept with User Applications
After having successfully implemented a K8s-based storage cluster for inter-cluster NFS shares with Rook-NFS, I naturally wanted to use these 3 volumes in a separate K8s cluster dedicated to user applications.
But first of all I had to implement three instances of the nfs-client from the K8s incubator.
This time I did not use the helm chart version of nfs-client-provisioner.
I made three copies of the nfs-client deploy directory and adapted the YAML files appropriately.
After these preparations, I could start deploying some stateful user applications via helm charts to my application cluster. I've used metalLB again, to get externally accessible IP addresses for each of the 3 helm apps.
DokuWiki uses two PVs: one for the Apache web server and another one for DokuWiki itself.
The Ghost CMS has an additional dependency on a database app: MariaDB.
That's why three PVs are needed for the Ghost app: two PVs for MariaDB and one PV for Ghost itself.
I did not have success so far, in installing NextCloud via the stable helm chart. :-(