From 1e9a58a79988c58c284b5011990bfc8bc20a1f06 Mon Sep 17 00:00:00 2001
From: Alexey Ukhov <auk@startext.ru>
Date: Tue, 24 Mar 2020 10:20:53 +0700
Subject: [PATCH 1/2] change cp with tar

---
 docker_clone_volume.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
 mode change 100644 => 100755 docker_clone_volume.sh

diff --git a/docker_clone_volume.sh b/docker_clone_volume.sh
old mode 100644
new mode 100755
index ce46efc..79175ba
--- a/docker_clone_volume.sh
+++ b/docker_clone_volume.sh
@@ -13,7 +13,7 @@ then
         exit
 fi
 
-if [ "$2" = "" ] 
+if [ "$2" = "" ]
 then
         echo "Please provide a destination volume name"
         exit
@@ -40,11 +40,11 @@ fi
 
 
 echo "Creating destination volume \"$2\"..."
-docker volume create --name $2  
+docker volume create --name $2
 echo "Copying data from source volume \"$1\" to destination volume \"$2\"..."
 docker run --rm \
            -i \
            -t \
            -v $1:/from \
            -v $2:/to \
-           alpine ash -c "cd /from ; cp -av . /to"
+           alpine ash -c "cd /from && tar cf - . | (cd /to && tar xvf -)"

From 197c65cdec5afafea943d2f6ab31b2f14ec8cc4e Mon Sep 17 00:00:00 2001
From: Alexey Ukhov <auk@startext.ru>
Date: Tue, 24 Mar 2020 14:49:51 +0700
Subject: [PATCH 2/2] add export volume script

---
 docker_export_volume.sh | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 docker_export_volume.sh

diff --git a/docker_export_volume.sh b/docker_export_volume.sh
new file mode 100755
index 0000000..4cb413b
--- /dev/null
+++ b/docker_export_volume.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Author: Alexey Ukhov <alex@ukhov.ru>
+
+SCRIPTSRC=`readlink -f "$0" || echo "$0"`
+SCRIPT_PATH=`dirname "$SCRIPTSRC" || echo .`
+
+#First check if the user provided all needed arguments
+if [ "$1" = "" ]
+then
+        echo "Please provide a source volume name"
+        exit
+fi
+
+#Check if the source volume name does exist
+docker volume inspect $1 > /dev/null 2>&1
+if [ "$?" != "0" ]
+then
+        echo "The source volume \"$1\" does not exist"
+        exit
+fi
+
+BACKUP_FOLDER=${2:-backup}
+if [ ! -d "${BACKUP_FOLDER}" ]
+then
+        echo "Create backup folder '${BACKUP_FOLDER}'"
+        mkdir -p ${BACKUP_FOLDER}
+fi
+
+NOW=$(date +"%Y-%m-%d-%H-%M-%S")
+BACKUP_FILE=${BACKUP_FOLDER}/$1_${NOW}.tar.gz
+
+echo "Export volume '$1' into file '${BACKUP_FILE}'"
+docker run --rm -v $1:/from alpine ash -c 'cd /from && tar -cOzf - .' > ${BACKUP_FILE}
\ No newline at end of file