k8s issues

1. pods dns search and communication
2. persistent volume capabilities
     so many different drivers, very confusing.
     policies are very confusing, tied way too much to the underlying storage. Recycle, Retain, what are the differences and what do they exactly mean.
3. pod allocation policies
4. Start using k8s is not a walk in the park, gke(google), aks(Azure), CKS (Cloud Kubernetes Service) (IBM) provide a fairly easy process to start a k8s cluster, however, eks(Amazon) requires a user to create a role to authorize a cluster creation, the process of creating that role is not very obvious. EKS asks to add worker node which is a separate step.
5. Getting the kubeconfig file is where things really going dramatically different.
     1. IBM offers a link to download
     2. Google and Microsoft require their own client tools to get i, glcoud and az
     3. Amazon offers an instruction and copy/paste to accomplish that.
6. To create a persistent volume claim, this is very different.
7. Dashboard access, from easy to somewhat so weird approaches, for example, IBM provides a simple link to the standard k8s dashboard, Azure provides a command to start a proxy server, then user can access that proxy server for the dashboard, I think this is a rather strange way of offering the dashboard access.
8. Length of the provisioning is long.
9. docker in docker issue. end point unknown, using daemon set to create dind container for endpoint.

alibaba kubernetes service.

a PV can only be used by one PVC. and the policy has to be set to Recycle for NFS persistent volume.