Docker cleanup environment operation

[root@www ~]# cat clean_docker_log_space.log 
#!/bin/bash
docker_log_files=$(find /var/lib/docker/containers/ -name '*-json.log')
docker_logs_size=$(find /var/lib/docker/containers/ -name '*-json.log' | xargs du -sc | tail -1 |awk '{print $1,"K"}')
free -h && sync && echo 1 > /proc/sys/vm/drop_caches #Release system cache echo -e "\033[32mThe docker log total size is $docker_logs_size\033[0m"
 
for log in $docker_log_files
  do
   echo "Now is cleaning docker log,docker core logs:$log"
    cat /dev/null > $log
    systemctl reload docker #Reload the docker service without affecting existing docker
  done 
 
free -h

[root@www ~]# ./clean_docker_log_space.log 
       total used free shared buff/cache available
Mem: 976M 598M 112M 6.8M 264M 157M
Swap: 511M 66M 445M
The docker log total size is 80 K
Now is cleaning docker log,docker core logs:/var/lib/docker/containers/7538f077348e3c9722fb90ed4b0a5c3d60d72112e989526767c63d55f5a76f3e/7538f077348e3c9722fb90ed4b0a5c3d60d72112e989526767c63d55f5a76f3e-json.log
Now is cleaning docker log,docker core logs:/var/lib/docker/containers/235d20190027e757a203f1b4d4093335fb92ba515f7a501448c36c1332c622a2/235d20190027e757a203f1b4d4093335fb92ba515f7a501448c36c1332c622a2-json.log
Now is cleaning docker log,docker core logs:/var/lib/docker/containers/685a7af447ce884de1e9bbeb5d4ca0ca99860096f71c33b4f9a4d15a427c5e00/685a7af447ce884de1e9bbeb5d4ca0ca99860096f71c33b4f9a4d15a427c5e00-json.log
       total used free shared buff/cache available
Mem: 976M 599M 176M 6.8M 200M 168M
Swap: 511M 66M 445M
 
[root@www ~]# find /var/lib/docker/containers/ -name '*-json.log' | xargs du -sc | tail -1 |awk '{print $1,"K"}'
0K

#First, mount the disk with the required capacity and select /data as the mount directory
[root@www ~]# mkdir -p /data
#Stop Docker
[root@www ~]# systemctl stop docker
 
#Move data to a new directory [root@www ~]# mv /var/lib/docker /data
#Modify configuration, add --graph /data
[root@www ~]# vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --graph /data 
 
[root@www ~]# systemctl daemon-reload
[root@www ~]# systemctl start docker 
[root@www ~]# systemctl enable docker.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.