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https://github.com/gdiepen/docker-convenience-scripts.git
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688a6a8545
When using docker_clone_volume.sh, I found that when copying a volume with influxdb data, the clones image was bigger than the original. cause: alpine base image contains a cp version (busybox) which does _not_ preserve hardlinks, even with the -a option. This is fixed by using an ubuntu base image instead of alpine. downside: ubuntu image is larger than alpine. Source volume: influxdb_data 380.2 MB Before: influxdb_data.bak 443.5 MB After: influxdb_data.ubuntu.bak 380.2 MB
51 lines
1.1 KiB
Bash
Executable File
51 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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#Author: Guido Diepen
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#Convenience script that can help me to easily create a clone of a given
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#data volume. The script is mainly useful if you are using named volumes
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#First check if the user provided all needed arguments
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if [ "$1" = "" ]
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then
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echo "Please provide a source volume name"
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exit
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fi
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if [ "$2" = "" ]
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then
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echo "Please provide a destination volume name"
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exit
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fi
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#Check if the source volume name does exist
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docker volume inspect $1 > /dev/null 2>&1
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if [ "$?" != "0" ]
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then
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echo "The source volume \"$1\" does not exist"
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exit
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fi
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#Now check if the destinatin volume name does not yet exist
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docker volume inspect $2 > /dev/null 2>&1
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if [ "$?" = "0" ]
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then
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echo "The destination volume \"$2\" already exists"
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exit
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fi
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echo "Creating destination volume \"$2\"..."
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docker volume create --name $2
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echo "Copying data from source volume \"$1\" to destination volume \"$2\"..."
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docker run --rm \
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-i \
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-t \
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-v $1:/from \
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-v $2:/to \
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ubuntu bash -c "cd /from ; cp -av . /to"
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