Docker enables seamless calling of shell commands between container and host

As shown below:

nsenter -t 1 -m -u -n -i sh -c "echo hello world!"

Add privilege permissions to the docker container and set pid: "host"

Supplement: Execute shell scripts or commands in docker containers on the host

Common command forms:

docker exec -it master /bin/bash -c 'echo $PATH'
docker exec -it master /bin/bash -c 'cd /home/bigdata/shell && ./test.sh'

If the shell script involves environment variables, or prompts JAVA_HOME is not set, you can add the following command to the script

export JAVA_HOME=jdk path

Supplement: Run the commands executed in the container in Docker on the Docker host

The script is as follows:

docker exec -u root xxx(container name) bash -c 'command 1 && command 2'

A practical example is as follows:

docker exec -u root mycentos bash -c 'mkdir /home/test.txt && chmod 777 /home/test.txt && runuser - oracle -c "rm -rf /home/test.txt"'

The above is my personal experience. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM. If there are any mistakes or incomplete considerations, please feel free to correct me.