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Fix docker_clone_volume.sh to preserve hard-links #19

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Fix docker_clone_volume.sh to preserve hard-links #19

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Commits on Feb 17, 2023

  1. Fix docker_clone_volume.sh to preserve hard-links 

    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
    @harmv
    harmv committed Feb 17, 2023
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