c12s-kubespray/roles/container-engine/docker/files/cleanup-docker-orphans.sh

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#!/bin/bash
list_descendants ()
{
local children=$(ps -o pid= --ppid "$1")
for pid in $children
do
list_descendants "$pid"
done
[[ -n "$children" ]] && echo "$children"
}
count_shim_processes=$(pgrep -f ^docker-containerd-shim | wc -l)
if [ ${count_shim_processes} -gt 0 ]; then
# Find all container pids from shims
orphans=$(pgrep -P $(pgrep -d ',' -f ^docker-containerd-shim) |\
# Filter out valid docker pids, leaving the orphans
egrep -v $(docker ps -q | xargs docker inspect --format '{{.State.Pid}}' | awk '{printf "%s%s",sep,$1; sep="|"}'))
if [[ -n "$orphans" ]]
then
# Get shim pids of orphans
orphan_shim_pids=$(ps -o pid= $(ps -o ppid= $orphans))
# Find all orphaned container PIDs
orphan_container_pids=$(for pid in $orphan_shim_pids; do list_descendants $pid; done)
# Recursively kill all child PIDs of orphan shims
echo -e "Killing orphan container PIDs and descendants: \n$(ps -O ppid= $orphan_container_pids)"
kill -9 $orphan_container_pids || true
else
echo "No orphaned containers found"
fi
else
echo "The node doesn't have any shim processes."
fi