Docker uses the nsenter tool to enter the container

When using Docker containers, it is more convenient to use the nsenter tool. If our system does not have it, we need to install it ourselves

1. First visit this website to find the latest version of the nsenter tool

2. Then download the source code of the nsenter tool to our host

Enter the command:

# wget https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.32/util-linux-2.32.tar.gz

3. Unzip the .tar.gz package

# tar -xzvf util-linux-2.32.tar.gz

4. Enter the directory of util-linux-2.32

# cd util-linux-2.32/

5. Enter the ./configure --without-ncurses command

6. Enter the command make nsenter to compile nsenter

7. Copy nsenter to the /usr/local/bin path

# cp nsenter /usr/local/bin

8. Check the usage of nsenter

# nsenter --help

9. In order to connect to the container, we also need to find the PID of the first process of the container, which can be obtained by the following command

Format:

PID=$(docker inspect --format "{{ .State.Pid}}" <container id>)

By obtaining this PID, you can connect to this container:

Format:

nsenter --target $PID --mount --uts --ipc --net --pid

10. Get the PID of the first process in the container

Enter the command # docker ps to view the running container

Enter the command to view the container

PID of the process of c74e0f07a914# docker inspect -f {{.State.Pid}} c74e0f07a914

10. Get the PID of the process and enter the container

Enter the command

# nsenter --target 21140 --mount --uts --ipc --net --pid

Successfully entered the container, 21140 is the process PID of container c74e0f07a914

The above operation of using the nsenter tool to enter the container in Docker is all the content that the editor shares with you. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM.