![]() ![]() ![]() docker pull postgres Overview Tags Note: the description for this image is longer than the Hub length limit of 25000, so has been trimmed. This similarly applies to other images like tomcat, php:fpm, or nginx where the base image is a complete runnable thing and not just a language runtime. 10K+ The PostgreSQL object-relational database system provides reliability and data integrity. Its docker-entrypoint.sh is rather involved: it takes responsibility for creating the initial database storage, starting a temporary database, running anything in the /docker-entrypoint-initdb.d directory, and then eventually calling exec to run the CMD.įor the Dockerfile you show, you don't need to repeat the CMD its base image already declares an identical CMD and it's fine to just inherit it. Since the image has both an ENTRYPOINT and a CMD these are combined into a single command and its arguments and you are seeing that combined command there.Ī typical use for ENTRYPOINT is as a wrapper that does some first-time setup, then executes the CMD. def greet (username): print ('Hello s' (username)) Now I want to start my docker container from this image such that I invoke this function greet inside the file handler.py along with an argument. My final solution is following you last 'simple' case, neither write ENTRYPOINT nor CMD, just RUN sudo chown -R user:user /home/user/che, and invoke it like this: docker run -it -rm -privileged -nethost my/che bash -c ' sudo service docker start & cd /home/user/che/bin/ &. Your derived image inherits that ENTRYPOINT, but replaces its CMD. Inside handler.py, we have a function greet such that. You might want to research how to properly use this command. So, what's the difference between those two commands docker Share edited at 23:56 John Smith 7,223 6 49 61 asked at 13:04 Golo Roden 140k 96 297 423 2 that Thanks slm. 1 and 4 kestrel and web are themselves a shell script that if you open, youll find the same dnx. An ENTRYPOINT helps you to configure a container that you can run as an executable. The examples you listed are more or less the same. The base image's Dockerfile declares an ENTRYPOINT to run that shell script. Entrypoint is just the command to run when docker starts. ![]()
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