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Add contrib/nuke-graph-directory.sh script to clean out old /var/lib/…
…docker directories much more easily Signed-off-by: Andrew Page <admwiggin@gmail.com>
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#!/bin/sh | ||
set -e | ||
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dir="$1" | ||
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if [ -z "$dir" ]; then | ||
{ | ||
echo 'This script is for destroying old /var/lib/docker directories more safely than' | ||
echo ' "rm -rf", which can cause data loss or other serious issues.' | ||
echo | ||
echo "usage: $0 directory" | ||
echo " ie: $0 /var/lib/docker" | ||
} >&2 | ||
exit 1 | ||
fi | ||
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if [ "$(id -u)" != 0 ]; then | ||
echo >&2 "error: $0 must be run as root" | ||
exit 1 | ||
fi | ||
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if [ ! -d "$dir" ]; then | ||
echo >&2 "error: $dir is not a directory" | ||
exit 1 | ||
fi | ||
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dir="$(readlink -f "$dir")" | ||
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echo | ||
echo "Nuking $dir ..." | ||
echo ' (if this is wrong, press Ctrl+C NOW!)' | ||
echo | ||
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( set -x; sleep 10 ) | ||
echo | ||
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dir_in_dir() { | ||
inner="$1" | ||
outer="$2" | ||
[ "${inner#$outer}" != "$inner" ] | ||
} | ||
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# let's start by unmounting any submounts in $dir | ||
# (like -v /home:... for example - DON'T DELETE MY HOME DIRECTORY BRU!) | ||
for mount in $(awk '{ print $5 }' /proc/self/mountinfo); do | ||
mount="$(readlink -f "$mount" || true)" | ||
if dir_in_dir "$mount" "$dir"; then | ||
( set -x; umount -f "$mount" ) | ||
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fi | ||
done | ||
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# now, let's go destroy individual btrfs subvolumes, if any exist | ||
if command -v btrfs &> /dev/null; then | ||
root="$(df "$dir" | awk 'NR>1 { print $NF }')" | ||
for subvol in $(btrfs subvolume list -o "$root" 2>/dev/null | awk -F' path ' '{ print $2 }'); do | ||
subvolDir="$root/$subvol" | ||
if dir_in_dir "$subvolDir" "$dir"; then | ||
( set -x; btrfs subvolume delete "$subvolDir" ) | ||
fi | ||
done | ||
fi | ||
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# finally, DESTROY ALL THINGS | ||
( set -x; rm -rf "$dir" ) |
What can we do when the umount returns device is busy? Is there anyway to clean without rebooting? (all containers are stopped, images cleaned)