linux 中 控制台 怎样和 docker 容器交互

发布网友 发布时间：2022-05-24 19:58

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热心网友 时间：2023-10-29 10:15

n previous articles [1,2,3] Lukas Pustina has given an introction to system-level virtualization with Docker. In this article I discuss 4 options how to connect to a running Docker container and interact with it. All code examples are available on GitHub so you can try yourself.

nsenter
The nsenter tool is part of the util-linux package since version 2.23. It provides access to the namespace of another process. nsenter requires root privileges to work properly. Unfortunately, util-linux is still at version 2.20 in Ubuntu 14.04. To install the latest version (2.24) proceed as follows:
cd /tmp
curl https://www.kernel.org/pub/linux/utils/util-linux/v2.24/util-linux-2.24.tar.gz | tar -zxf-cd util-linux-2.24./configure --without-ncursesmake nsentercp nsenter /usr/local/bin

In order to connect to a container, you have to find out the PID of the first process in the container.
docker inspect --format "{{ .State.Pid }}" <container-id>

With that PID you can connect to the container:
nsenter --target $PID --mount --uts --ipc --net --pid