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mysteriouss/overlay.sh

Created February 24, 2022 08:52
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  1. mysteriouss created this gist Feb 24, 2022.
    15 changes: 15 additions & 0 deletions overlay.sh
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    #!/bin/sh


    # grab the size and path to the largest overlay dir
    du /var/lib/docker/overlay2 -h | sort -h | tail -n 100 | grep -vE "overlay2$" > /tmp/large-overlay.txt

    # make sure json parser is installed
    # yum install -y jq
    # apt-get install jq -y

    # construct mappings of name to hash
    docker inspect $(docker ps -qa) | jq -r 'map([.Name, .GraphDriver.Data.MergedDir]) | .[] | "\(.[0])\t\(.[1])"' > /tmp/docker-mappings.txt

    # for each hashed path, find matching container name
    cat /tmp/large-overlay.txt | xargs -l bash -c 'if grep $1 /tmp/docker-mappings.txt; then echo -n "$0 "; fi'