k3s/examples/nfs

Example of NFS volume

See nfs-web-pod.yaml for a quick example, how to use NFS volume in a pod.

Complete setup

The example below shows how to export a NFS share from a pod and import it into another one.

###Prerequisites The nfs server pod creates a privileged container, so if you are using a Salt based KUBERNETES_PROVIDER (gce, vagrant, aws), you have to enable the ability to create privileged containers by API.

#At the root of Kubernetes source code
$ vi cluster/saltbase/pillar/privilege.sls

# If true, allow privileged containers to be created by API
allow_privileged: true

Rebuild the Kubernetes and spin up a cluster using your preferred KUBERNETES_PROVIDER.

NFS server part

Define NFS server pod and NFS service:

$ kubectl create -f nfs-server-pod.yaml
$ kubectl create -f nfs-server-service.yaml

The server exports /mnt/data directory as / (fsid=0). The directory contains dummy index.html. Wait until the pod is running!

NFS client

WEB server pod uses the NFS share exported above as a NFS volume and runs simple web server on it. The pod assumes your DNS is configured and the NFS service is reachable as nfs-server.default.kube.local. Edit the yaml file to supply another name or directly its IP address (use kubectl get services to get it).

Define the pod:

$ kubectl create -f nfs-web-pod.yaml

Now the pod serves index.html from the NFS server:

$ curl http://<the container IP address>/
Hello World!