init

docker_clone_volume_across_servers.sh

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+#!/bin/bash
+
+#Author: Guido Diepen
+
+#Convenience script that can help me to easily create a clone of a given
+#data volume. The script is mainly useful if you are using named volumes
+
+# On both hosts you should have running docker diemon
+# and have access to root obviously.
+
+# arg: $1: source volume name
+# arg: $2: target host
+# arg: $3: target volume name
+
+#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 target host (e.g. 1.1.1.1)"
+        exit
+fi
+
+if [ "$3" = "" ]
+then
+        echo "Please provide a target 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
+
+# todo? or not needed, cauz it will just be replaced?
+#Now check if the destinatin volume name does not yet exist
+# docker volume inspect $2 > /dev/null 2>&1
+#
+# if [ "$?" = "0" ]
+# then
+#         echo "The destination volume \"$2\" already exists"
+#         exit
+# fi
+
+docker run --rm \
+           -v $1:/from alpine ash -c \
+           "cd /from ; tar -cf - . " | \
+           ssh $2 \
+           'docker run --rm \
+           -i \
+           -v $3:/to alpine ash -c "cd /to ; tar -xpvf - "'