Docker-course-linux

docker.md

اینجا سعی کردم خلاصه مباحث مرتبط بین لینوکس و کانتینر‌ها رو به واسطه تدریس در دوره آموزشی داکر گرین‌وب، گردآوری کنم.

جزییات دوره: https://evnd.co/l2PJx

Containers

• First, read this concept: https://fen.wikipedia.org/wiki/OS-level_virtualization
• Many people use container systems like Docker, but how do they work? https://bit.ly/3fLhb58

Users and Permissions

• User/Groups
• File/Directory permissions
• Read more: https://www.linode.com/docs/guides/linux-users-and-groups/
• Read more: https://medium.com/@mccode/understanding-how-uid-and-gid-work-in-docker-containers-c37a01d01cf

Services/System management

• Process management
• System management
• PID 1 (pstree -n -p)
• We need these in the containers?
• Read more: https://docs.docker.com/config/containers/multi-service_container
• Read more: https://runnable.com/docker/rails/run-multiple-processes-in-a-container
• Read more: https://ahmet.im/blog/minimal-init-process-for-containers/

POSIX Signals

• Run docker run httpd:alpine and then enter Ctrl+C
• Read more: https://dsa.cs.tsinghua.edu.cn/oj/static/unix_signal.html
• Read more: https://hynek.me/articles/docker-signals/

Shell Vs Exec

• ENTRYPOINT ["/bin/app"] vs ENTRYPOINT /bin/app
• Read more: https://emmer.dev/blog/docker-shell-vs.-exec-form/

Standard input/output/error

• docker logs, am i joke to you?
• Read more: https://www.howtogeek.com/435903/what-are-stdin-stdout-and-stderr-on-linux/

Root user (God)

• For build? For run?
• Read more: https://engineering.bitnami.com/articles/why-non-root-containers-are-important-for-security.html