Add docker volume backup and restore

usr/local/bin/docker_backup_volume

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# https://github.com/spherex-dev/docker-backup-volume
+# creates a backup of the docker volume
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    -v|-volume|--volume)
+      volume="$2"
+      ;;
+    -p|-prefix|--prefix)
+      prefix="$2"
+      ;;
+    -h|-help|--help)
+      printf "--volume the name of the volume\n"
+      printf "--mount the mount point of the volume\n"
+      exit 1
+      ;;
+    *)
+      printf "***************************\n"
+      printf "* Error: Invalid argument.*\n"
+      printf "***************************\n"
+      exit 1
+  esac
+  shift
+  shift
+done
+
+uuid=$(cat /proc/sys/kernel/random/uuid)
+if [ ! -d $prefix/$volume ]; then
+  mkdir -p $prefix/$volume
+fi
+
+IMAGE=alpine:latest
+docker run \
+--mount "type=volume,src=${volume},dst=/data" \
+--name $uuid \
+$IMAGE
+
+timestamp=$(date +%Y-%m-%d_%H%M%S)
+docker cp -a $uuid:/data /tmp/$uuid
+tar -C /tmp/$uuid -czf $prefix/$volume/${timestamp}_${volume}.tar.gz .
+rm -rf /tmp/$uuid
+docker rm $uuid

usr/local/bin/docker_backup_volume_restore

@@ -0,0 +1,76 @@
+#!/bin/bash
+# https://github.com/spherex-dev/docker-backup-volume
+# creates a docker volume from a backup
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    -v|-volume|--volume)
+      volume="$2"
+      ;;
+    -p|-prefix|--prefix)
+      prefix="$2"
+      ;;
+    -n|-volume-name|--volume-name)
+      volume_name="$2"
+      ;;
+    -s|-snapshot|--snapshot)
+      snapshot="$2"
+      ;;
+    -h|-help|--help)
+      printf "--volume the backup name of the volume\n"
+      printf "--volume-name (optional) create the backup as this volume name\n"
+      printf "--prefix the storage prefix of the backup location"
+      exit 1
+      ;;
+    *)
+      printf "***************************\n"
+      printf "* Error: Invalid argument.*\n"
+      printf "***************************\n"
+      exit 1
+  esac
+  shift
+  shift
+done
+
+if [ -z "$volume_name" ]; then
+  volume_name=$volume
+fi
+
+volume_exists=$(docker volume ls | grep -q $volume_name)
+if [ $volume_exists ]; then
+  printf "***********************************\n"
+  printf "Error: volume $volume_name exists. \n"
+  printf "Please delete before proceeding    \n"
+  printf "***********************************\n"
+  exit 1
+fi
+
+if [ -z "$snapshot" ]; then
+  snapshot=$(ls -At ${prefix}/${volume}/ | tail -n 1)
+fi
+
+if [ -z "$snapshot" ]; then
+  printf "**********************************\n"
+  printf "* Error: Unable to find snapshot.*\n"
+  printf "**********************************\n"
+  exit 1
+else
+  echo "creating from snapshot: ${snapshot}"
+fi
+
+uuid=$(cat /proc/sys/kernel/random/uuid)
+cwd=$(pwd)
+
+IMAGE=alpine:latest
+docker run \
+--mount "type=volume,src=${volume_name},dst=/data" \
+--name $uuid \
+$IMAGE
+
+mkdir /tmp/$uuid
+tar -xf $prefix/$volume/$snapshot -C /tmp/$uuid 
+cd /tmp/$uuid
+
+docker cp -a . $uuid:/data
+docker rm $uuid
+cd $cwd