如何将文件从主机复制到 Docker 容器? [英] How to copy files from host to Docker container?

问题描述

我正在尝试为我们使用的 Docker 容器构建备份和恢复解决方案.

I am trying to build a backup and restore solution for the Docker containers that we work with.

我有我创建的 Docker 基础镜像，ubuntu:base，并且不想每次都使用 Docker 文件重建它以向其中添加文件.

I have Docker base image that I have created, ubuntu:base, and do not want have to rebuild it each time with a Docker file to add files to it.

我想创建一个从主机运行的脚本，并使用 ubuntu:base Docker 映像创建一个新容器，然后将文件复制到该容器中.

I want to create a script that runs from the host machine and creates a new container using the ubuntu:base Docker image and then copies files into that container.

如何将文件从主机复制到容器?

How can I copy files from the host to the container?

推荐答案

cp 命令可用于复制文件.

The cp command can be used to copy files.

可以将一个特定文件复制到容器中，例如:

One specific file can be copied TO the container like:

docker cp foo.txt container_id:/foo.txt

可以从容器中复制一个特定文件，例如:

One specific file can be copied FROM the container like:

docker cp container_id:/foo.txt foo.txt

强调一下，container_id 是一个容器 ID，不是图像 ID.(使用 docker ps 查看包含 container_ids 的列表.)

For emphasis, container_id is a container ID, not an image ID. (Use docker ps to view listing which includes container_ids.)

文件夹 src 中包含的多个文件可以使用以下命令复制到 target 文件夹中:

Multiple files contained by the folder src can be copied into the target folder using:

docker cp src/. container_id:/target
docker cp container_id:/src/. target

参考:cp 的 Docker CLI 文档

Reference: Docker CLI docs for cp

在 1.8 之前的 Docker 版本中，只能将文件从容器复制到主机.不是从主机到容器.

In Docker versions prior to 1.8 it was only possible to copy files from a container to the host. Not from the host to a container.

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