NFS and Microk8s

It is important to understand this file. Client ip addresses are highly trusted and controlled kubernetes nodes.

Do not run files on nas directory it should only be used as a file store.

#!/usr/bin/env bash
if [ "$#" -ne 2 ]; then
  echo "Usage: $0 <uuid> <nfs node type server/client>"
  echo "Example: $0 28a1f1f8-e686-11eb-bf45-7f257ca7269b server"
  exit
fi

uuid=$1
node_type=$2
server_host=nas
server_mnt=/$uuid
server_net_mnt=${server_host}:{server_dir}
# local_mnt=/var/snap/microk8s/common/nas-nfs-standard
client_mnt=/opt/local-path-provisioner
client_ips="10.x.x.x 10.x.x.x 10.x.x.x"

if ! [[ $uuid =~ ^\{?[A-F0-9a-f]{8}-[A-F0-9a-f]{4}-[A-F0-9a-f]{4}-[A-F0-9a-f]{4}-[A-F0-9a-f]{12}\}?$ ]]; then
  echo "E: Invalid uuid format."
exit
fi


install_client(){
  echo Installing client.
  grep $server_mnt /etc/fstab || sudo echo "$server_net_mnt $client_mnt nfs" | sudo tee -a /etc/fstab
  sudo mkdir -p $client_mnt && sudo chmod 0755 $client_mnt
  sudo apt install -y nfs-client  # nfs-common
}


install_server(){
  echo Installing server.
  sudo apt install nfs-kernel-server
  sudo mkdir -p $server_mnt && sudo chmod 0755 $server_mnt
  sudo mv /etc/exports /etc/exports.bkp
  for ip in $client_ips; do
    echo "$server_mnt    $ip(rw,sync,no_subtree_check,insecure,no_root_squash)" | sudo tee -a /etc/exports
  done
  sudo chmod 0644 /etc/exports
  sudo systemctl reload nfs-server
}


install_localpathprov(){
  # https://github.com/rancher/local-path-provisioner
  kubectl apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/deploy/local-path-storage.yaml
  kubectl create -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/examples/pvc/pvc.yaml
  kubectl create -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/examples/pod/pod.yaml
}


if [[ "$node_type" == "server" ]]; then
  install_server
elif [[ "$node_type" == "client" ]]; then
  install_client
else
  echo "E: Unsupported node_type."
fi

Testing

mkdir ~/mnt sudo mount -t nfs $server_host:/28a1f1f8-e686-11eb-bf45-7f257ca7269b ~/mnt echo hi > ~/mnt/hi.txt cat ~/mnt/hi.txt