Docker disk exhaustion

docker-disk-exhaustion.sh

#!/bin/bash

get_space_available() {
	grep 'Data Space Available' <<< "${1}"  | \
	sed -e 's/.*: //' | \
	xargs -I'{}' units '{}' "MB" -t
}

sudo docker pull ubuntu
i=0
while true; do
	date
	echo "Starting ${i}"
	container_name="dd-$i"
	i=$((i+1))
	containers+=(${container_name})
	sudo timeout 1m docker run --name=${container_name} --detach ubuntu dd if=/dev/urandom of=sample.txt bs=64M count=1 iflag=fullblock
	exitcode=$?
	if [[ ${exitcode} -eq 124 ]]; then
		echo "docker run is hanging"
		exit 1
	fi
	if [[ ${exitcode} -ne 0 ]]; then
		echo "docker run failed, this could be because space is too low (and is a good thing)"
		break
	fi
	containerexit=$(sudo timeout 5m docker wait ${container_name})
	exitcode=$?
	date
	if [[ ${exitcode} -eq 124 ]]; then
		echo "docker wait ${container_name} took too long"
		exit 1
	fi
	info=$(sudo timeout 1m docker info)
	if [[ $? -eq 124 ]]; then
		echo "docker info is hanging"
		exit 1
	fi
	space=$(get_space_available "${info}")
	echo "Space available: ${space}"
	if [[ "${space}" == "0" ]]; then
		echo "Space exhausted"
		break
	fi
done

sudo timeout 1m docker info
if [[ $? -eq 124 ]]; then
	echo "docker info is hanging"
	exit 1
fi

echo "docker exhausted the disk without hanging"