How to copy files in docker to outside

Methods for copying files to external hosts in Docker: Use the docker cp command: Execute docker cp [Options] . Using data volumes: Create a directory on the host, and use the -v parameter to mount the directory into the container when creating the container, so as to achieve two-way file synchronization.

Copy files inside Docker to external

When performing tasks in a Docker container, sometimes it is necessary to copy files in the container to an external host. The following two methods are introduced:

Method 1: Use docker cp command

The docker cp command is used to copy files between containers and hosts. The syntax is as follows:

<code class="text">docker cp [选项]  </code>

For example, to copy the /data/file.txt file in the container to /host/file.txt on the host, you can use the following command:

<code class="text">docker cp container:/data/file.txt /host/file.txt</code>

Method 2: Use data volumes

A data volume is a mechanism for mounting directories on the host into a container. By creating a data volume, two-way synchronization between files in the container and corresponding directories on the host can be achieved.

To copy files using a data volume, first create the directory to be mounted on the host, and then use the -v parameter to mount the directory into the container when creating the container. For example:

<code class="text">docker run -v /host/data:/data/mycontainer</code>

This command mounts the /host/data directory to /data/mycontainer in the container. Modifications to the /data/mycontainer directory in the container will be automatically reflected to the /host/data directory on the host and vice versa.

The above is the detailed content of How to copy files in docker to outside. For more information, please follow other related articles on the PHP Chinese website!