Cleanup script for Rancher v2.x

cleanup.sh

#!/bin/sh

containers=$(docker ps -qa)
for container in $containers; do
  echo "Removing $container"
done
if [ ! -z "$containers" ]
then
  docker rm -f $containers
fi

volumes=$(docker volume ls -q)
for volume in $volumes; do
  echo "Removing $volume"
done
if [ ! -z "$volumes" ]
then
  docker volume rm $volumes
fi

for mount in $(mount | grep tmpfs | grep '/var/lib/kubelet' | awk '{ print $3 }') /var/lib/kubelet; do
  if [ -d $mount ]
  then
    umount $mount;
  fi
done

cleanupdirs="/etc/ceph /etc/cni /etc/kubernetes /opt/cni /opt/rke /run/secrets/kubernetes.io /run/calico /run/flannel /var/lib/calico /var/lib/etcd /var/lib/cni /var/lib/kubelet /var/lib/rancher/rke/log $
for dir in $cleanupdirs; do
  if [ -d $dir ]
  then
    echo "Removing $dir"
    rm -rf $dir
  fi
done

curl -L https://gist.githubusercontent.com/ragaar/d36ce69de534ae58f64a317e09bae440/raw/e4a0939878685539a9b11f259f3cba95ffd3fbfe/cleanup.sh -o cleanup.sh
chmod a+x cleanup.sh
sudo sh cleanup.sh

sudo permissions could, most likely, be restricted to the umount and rm -rf, but it depends on your locally defined permissions.