【Docker】Commands used occasionally (bulk delete command, backup data volume)
Batch delete command
Bulk deletion of stopped containers, untagged images, unused volumes, and unused networks
docker system pruneBulk deletion of stopped containers
docker container pruneDelete all containers at once
docker rm -f `docker ps -a -q`Batch deletion of unused images
docker image pruneBatch delete untagged images
docker rmi `docker images -f "dangling=true" -q`Bulk deletion of unused volumes
docker volume pruneBackup/restore Docker data volumes
Backup
Create a container and retrieve a backup (named backup.tar) of “/var/lib/mysql" where MySQL data is stored in the current directory ($PWD) on the host side.
The container is immediately destroyed by the -rm option.
docker run --rm --volumes-from mysql_con -v $PWD:/backup busybox tar cvf /backup/backup.tar /var/lib/mysqlIf successful, a backup.tar file will be generated in the host’s current directory.
Restore
Assume that you want to create a new MySQL server container named mysql_con2 and restore backup files to this container. The following command will simultaneously create the data volume mysql_db2.
docker run --name mysql_con2 -v mysql_db2:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=pass -d mysqlCreate a container just for restoring and extract the backup.tar file in the host’s current directory ($PWD).
docker run --rm --volumes-from mysql_con2 -v $PWD:/backup busybox tar xvf /backup/backup.tar