Create docker_gzip_volume.sh

README.md

@@ -11,6 +11,10 @@ to ensure I have the latest production data also at development.
 
 You can find more details in my blog post [Cloning Docker Data Volumes](https://www.guidodiepen.nl/2016/05/cloning-docker-data-volumes/)
 
+## docker_gzip_volume.sh
+
+The purpose for this script is that I can easily gzip a volume so that it can be backed up and restored on the same or different host.
+
 ## docker_get_data_volume_info.sh
 
 The purpose for this script is that I can easily get a list of details for all data volumes 

docker_gzip_volume.sh

@@ -0,0 +1,44 @@
+!/bin/bash
+
+#Author: Guido Diepen
+
+#Convenience script that can help me to easily create a gzip of a given
+#data volume. The script is mainly useful if you are using named volumes
+
+
+#First check if the user provided all needed arguments
+if [ "$1" = "" ]
+then
+        echo "Please provide a source volume name"
+        exit
+fi
+
+if [ "$2" = "" ]
+then
+        echo "Please provide a destination 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
+
+#Now check if the destination exists
+if [ ! -d "$2" ]
+then
+        echo "The destination \"$2\" doesn't exist"
+        exit
+fi
+
+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 ; tar zcvf \"/to/$1`date +%Y%m%d%H%M`.gz\" ."