Docker clean up

docker-cleanup.sh

#!/bin/bash

docker_version_regex='^(1\.[4-8]\.)'
docker_version=`docker --version | awk '{print \$3}'`
log_directory='/logs'
log_file="$log_directory"/cleanup.log

if [ ! -d "$log_directory" ]; then
  mkdir "$log_directory"
fi

echo -e "\n------------------------------------------------" >> "$log_file"
echo -e "------------------------------------------------" >> "$log_file"

echo "Starting docker cleanup at:  $(date)" >> "$log_file"

if ! [[ $docker_version =~ $docker_version_regex ]]
then
        echo "Docker version is not compatible. Program will stop." >> "$log_file"
        exit 1
fi

disk_space_before=`df -k / | awk 'NR==2 {print \$4}'`

echo -e "\nStarting local repo cleanup..." >> "$log_file"

#remove unused docker images
echo -e "\nRemoving unused docker images" >> "$log_file"
docker rmi $(docker images -qa) &>> "$log_file"

#remove dangling images
echo -e "\nRemoving dangling docker images" >> "$log_file"
docker rmi $(docker images -q -f dangling=true)

#run cleanup volumes
echo -e "\nCleaning up volumes" >> "$log_file"
docker run -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker:/var/lib/docker --rm martin/docker-cleanup-volumes &>> "$log_file"

echo -e "\n\nStarting private registry cleanup...\n" >> "$log_file"

sh /opt/ccvrp/maintenance/cleanup-routines/remove-orphan-images.sh &>> "$log_file"

disk_space_after=`df -k / | awk 'NR==2 {print \$4}'`

freed_diskspace=$(($disk_space_after - $disk_space_before))

echo -e "\nDocker cleanup finished. Total Disk space freed : $freed_diskspace Ko." >> "$log_file"