ohmydevops/docker.md

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Docker-course-linux

Raw

Containers

https://en.wikipedia.org/wiki/OS-level_virtualization

Users and Permissions

User/Groups
File/Directory permissions
Read more: https://www.linode.com/docs/guides/linux-users-and-groups/

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/

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