docker-compose无法切换用户

问题描述

jupyter:
    image: flink:1.19-py
    privileged: true
    user: root
    ports:
      - "9999:8888"
    volumes:
      - /data/docker_data/jupyter:/work
    command: sh -c "cd / && jupyter notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494ee71fdaa8c4a563"
    networks:
      - flink-net

为什么容器内执行的命令用户是flink

root@22c47eeae6cf:/opt/flink# ps -ef
UID          PID    PPID  C STIME TTY          TIME CMD
flink          1       0  0 06:10 ?        00:00:00 sh -c cd / && jupyter notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494ee71fdaa8c4a563
flink         78       1  0 06:10 ?        00:00:01 /usr/bin/python3 /usr/local/bin/jupyter-notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494ee

原因分析

docker-compose.yml 中指定了 command，但是没有指定 entrypoint
实际启动容器时仍使用了镜像里的entry-point，command只是作为entry-point.sh 脚本的参数

在entry-point脚本中切换了用户

解决方案

修改docker-compose.yml 中的entrypoint

  jupyter:
    image: flink:1.19-py
    privileged: true
    user: root
    ports:
      - "9999:8888"
    volumes:
      - /data/docker_data/jupyter:/work
    entrypoint: sh
    command:
      - "-c"
      - "cd / && jupyter notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494ee71fdaa8c4a563"
    networks:
      - flink-net

结果正确

[root@localhost data]# docker exec -it data_jupyter_1 bash
root@95fbecd2211a:/opt/flink# ps -ef
UID          PID    PPID  C STIME TTY          TIME CMD
root           1       0  0 06:44 ?        00:00:00 sh -c cd / && jupyter notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494ee71fdaa8c4a563
root           7       1  6 06:44 ?        00:00:01 /usr/bin/python3 /usr/local/bin/jupyter-notebook --ip 0.0.0.0 --port 8888 --allow-root --NotebookApp.password=sha1:6587feaef3b1:6b243404e4cfaafe611fdf494eeroot          10       0  0 06:44 pts/0    00:00:00 bash
root          18      10  0 06:44 pts/0    00:00:00 ps -ef