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---
title: "Enable NFS on K3S"
date: 2021-12-26
tags: ['kubernetes', 'linux', 'helm', 'k3s']
---
By default [[https://k3s.io/][K3S]] comes only with [[https://github.com/rancher/local-path-provisioner][local-path]] storage class, and if you are running
with more than one node in your cluster you may want to use a more "distributed"
solution. For may case I opted for NFS.
To check the current storage class you can run:
#+BEGIN_SRC bash
k3s kubectl get storageclasses
#+END_SRC
And it will print something like:
#+BEGIN_SRC
NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE
local-path (default) rancher.io/local-path Delete WaitForFirstConsumer false 154d
#+END_SRC
To start adding First you need to install [[https://github.com/helm/helm][helm]] on your server. To do so you may
run:
#+BEGIN_SRC bash
curl -sSL https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
#+END_SRC
*Be careful when running scripts directly into bash always check the source*
*Sometimes is also recommended to do not pipe directly to bash*
Once it is installed we need to add the [[https://kubernetes.io/docs/concepts/storage/storage-classes/#nfs][NFS storage classes]]. It has two
providers, I have chose [[https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner][NFS Subdir External Provisioner]].
Add the helm repo
#+BEGIN_SRC bash
helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner/
#+END_SRC
Then we need to actually install the provider
#+BEGIN_SRC bash
helm install nfs-subdir-external-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner \
--set nfs.server=x.x.x.x \
--set nfs.path=/exported/path
#+END_SRC
Set the ~nfs.server~ and ~nfs.path~ accordingly with your setup.
After that if we run ~k3s kubectl get storageclasses~ it will now print another
NFS provider:
#+BEGIN_SRC
NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE
local-path (default) rancher.io/local-path Delete WaitForFirstConsumer false 154d
nfs-client cluster.local/nfs-subdir-external-provisioner Delete Immediate true 76m
#+END_SRC
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