进入容器内部备份数据库

docker exec-it postgres/bin/bash psql-U affine dt

备份

docker exec-it postgres/bin/bash pg_dump-U affine-d affine>affine_backup_.sql

还原

psql-U postgres-d affine<affine_backup_.sql

文件拷贝

退出到宿主机器

docker cp postgres:/affine_backup_.sql.docker cp affine_backup.sql postgres_16:/affine_backup.sql