first draft of docker volume management script

bin/dvbackup

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# https://stackoverflow.com/questions/26331651/how-can-i-backup-a-docker-container-with-its-data-volumes/26339869#26339869
+# This script allows you to backup a single volume from a container
+# Data in given volume is saved in the current directory in a tar archive.
+CONTAINER_NAME=$1
+VOLUME_NAME=$2
+
+usage() {
+  echo "Usage: $0 [container name] [volume name]"
+  exit 1
+}
+
+if [ -z $CONTAINER_NAME ]
+then
+  echo "Error: missing container name parameter."
+  usage
+fi
+
+if [ -z $VOLUME_NAME ]
+then
+  echo "Error: missing volume name parameter."
+  usage
+fi
+
+sudo docker run -rm --volumes-from $CONTAINER_NAME -v $(pwd):/backup busybox tar cvf /backup/$CONTAINER_NAME_$VOLUME_NAME.tar $VOLUME_NAME

bin/dvrestore

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+#!/bin/bash
+
+# https://stackoverflow.com/questions/26331651/how-can-i-backup-a-docker-container-with-its-data-volumes/26339869#26339869
+# This script allows you to restore a single volume from a container
+# Data in restored in volume with same backupped path
+CONTAINER_NAME=$1
+VOLUME_NAME=$2
+
+usage() {
+  echo "Usage: $0 [container name]"
+  exit 1
+}
+
+if [ -z $NEW_CONTAINER_NAME ]
+then
+  echo "Error: missing container name parameter."
+  usage
+fi
+
+sudo docker run -rm --volumes-from $CONTAINER_NAME -v $(pwd):/backup busybox tar xvf /backup/$CONTAINER_NAME_$VOLUME_NAME.tar

bin/move-dockervol

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+docker run --rm \
+-v <SOURCE_DATA_VOLUME_NAME>:/from \
+alpine ash -c "cd /from ; tar -cf - . " | ssh <TARGET_HOST> 'docker run --rm -i -v <TARGET_DATA_VOLUME_NAME>:/to alpine ash -c "cd /to ; tar -xpvf - " '