Dockerfile:RUN apt-get update && apt-get upgrade --assume-yesENTRYPOINT service mysql startJamess-iMac:docker-python-testjameslin$ docker run -i -t 9618f7
12 hours ago Up 12 hours 33060/tcp, 0.0.0.0:3314->3306/tcp, :::3314->3306/tcp mysql_host我想知道docker-entrypoint.sh in CMD是什么。我理解CMD定义了PID1,换句话说,它定义了这个容器的用途以及每个容器应该做什么。DockerfileCOPY