上面那个答案对我没用。我一直得到这个错误:

psql: error: FATAL:  Peer authentication failed for user "postgres"

为了让它工作，我必须为docker容器指定一个用户:

备份

docker exec -t --user postgres your-db-container pg_dumpall -c -U postgres > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

恢复

cat your_dump.sql | docker exec -i --user postgres your-db-container psql -U postgres

这是对我有用的命令。

cat your_dump.sql | sudo docker exec -i {docker-postgres-container} psql -U {user} -d {database_name}

例如

cat table_backup.sql | docker exec -i 03b366004090 psql -U postgres -d postgres

参考:GMartinez-Sisti在讨论中给出的解决方案。 https://gist.github.com/gilyes/525cc0f471aafae18c3857c27519fc4b

Dksnap (https://github.com/kelda/dksnap)自动运行pg_dumpall并通过/docker-entrypoint-initdb.d加载转储。

它向您显示正在运行的容器列表，您可以选择要备份的容器。生成的工件是一个常规的Docker映像，因此您可以Docker运行它，或者通过将它推送到Docker注册表来共享它。

(免责声明:我是项目的维护者)

docker-compose用户的解决方案:

At First run the docker-compose file by any on of following commands: $ docker-compose -f loca.yml up OR docker-compose -f loca.yml up -d For taking backup: $ docker-compose -f local.yml exec postgres backup To see list of backups inside container: $ docker-compose -f local.yml exec postgres backups Open another terminal and run following command: $ docker ps Look for the CONTAINER ID of postgres image and copy the ID. Let's assume the CONTAINER ID is: ba78c0f9bcee Now to bring that backup into your local file system, run the following command: $ docker cp ba78c0f9bcee:/backups ./local_backupfolder

希望这能帮助到像我一样迷路的人。

注意:这个解决方案的全部细节可以在这里找到。

我想为备份和恢复添加官方docker文档。这适用于卷中的所有类型的数据，而不仅仅是postegres。

Backup a container Create a new container named dbstore: $ docker run -v /dbdata --name dbstore ubuntu /bin/bash Then in the next command, we: Launch a new container and mount the volume from the dbstore container Mount a local host directory as /backup Pass a command that tars the contents of the dbdata volume to a backup.tar file inside our /backup directory. $ docker run --rm --volumes-from dbstore -v $(pwd):/backup ubuntu tar cvf /backup/backup.tar /dbdata When the command completes and the container stops, we are left with a backup of our dbdata volume. Restore container from backup With the backup just created, you can restore it to the same container, or another that you made elsewhere. For example, create a new container named dbstore2: $ docker run -v /dbdata --name dbstore2 ubuntu /bin/bash Then un-tar the backup file in the new container`s data volume: $ docker run --rm --volumes-from dbstore2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf /backup/backup.tar --strip 1" You can use the techniques above to automate backup, migration and restore testing using your preferred tools.

我认为您还可以使用postgres备份容器，它可以在给定的时间内备份您的数据库。

  pgbackups:
    container_name: Backup
    image: prodrigestivill/postgres-backup-local
    restart: always
    volumes:
      - ./backup:/backups
    links:
      - db:db
    depends_on:
      - db
    environment:
      - POSTGRES_HOST=db
      - POSTGRES_DB=${DB_NAME} 
      - POSTGRES_USER=${DB_USER}
      - POSTGRES_PASSWORD=${DB_PASSWORD}
      - POSTGRES_EXTRA_OPTS=-Z9 --schema=public --blobs
      - SCHEDULE=@every 0h30m00s
      - BACKUP_KEEP_DAYS=7
      - BACKUP_KEEP_WEEKS=4
      - BACKUP_KEEP_MONTHS=6
      - HEALTHCHECK_PORT=81