Basado en Docker components explained de Alexander Holbreich y What's the difference between RunC, Containerd and Docker de Alena Varkockova

Ver también [2014-presente] Kubernetes

Docker and Broad Industry Coalition Unite to Create Open Container Project

“Esta mañana, Docker, junto con una amplia coalición de proveedores, usuarios, nuevas empresas y líderes de la industria, hizo uno de los [anuncios] más importantes en la historia de la tecnología de contenedores. En resumen, nos unimos para formar un proyecto minimalista, sin ánimo de lucro, abiertamente gobernado, The Open Container Project, bajo los auspicios de la Fundación Linux con el expreso propósito de definir especificaciones comunes sobre el formato de contenedor y el tiempo de ejecución. Docker donará nuestro formato de contenedor base y tiempo de ejecución, runC, a este proyecto, para ayudar a formar la piedra angular de la nueva tecnología. Y, en un desarrollo reciente particularmente emocionante, las personas talentosas detrás de appc ahora se unen a nosotros como cofundadores.”

https://docs.docker.com/engine/reference/commandline/cli/

docker: the base command for the Docker CLI.

docker attach 	Attach local standard input, output, and error streams to a running container
docker build 	Build an image from a Dockerfile
docker builder 	Manage builds
docker checkpoint 	Manage checkpoints
docker commit 	Create a new image from a container’s changes
docker config 	Manage Docker configs
docker container 	Manage containers
docker context 	Manage contexts
docker cp 	Copy files/folders between a container and the local filesystem
docker create 	Create a new container
docker deploy 	Deploy a new stack or update an existing stack
docker diff 	Inspect changes to files or directories on a container’s filesystem
docker engine 	Manage the docker engine
docker events 	Get real time events from the server
docker exec 	Run a command in a running container
docker export 	Export a container’s filesystem as a tar archive
docker history 	Show the history of an image
docker image 	Manage images
docker images 	List images
docker import 	Import the contents from a tarball to create a filesystem image
docker info 	Display system-wide information
docker inspect 	Return low-level information on Docker objects
docker kill 	Kill one or more running containers
docker load 	Load an image from a tar archive or STDIN
docker login 	Log in to a Docker registry
docker logout 	Log out from a Docker registry
docker logs 	Fetch the logs of a container
docker manifest 	Manage Docker image manifests and manifest lists
docker network 	Manage networks
docker node 	Manage Swarm nodes
docker pause 	Pause all processes within one or more containers
docker plugin 	Manage plugins
docker port 	List port mappings or a specific mapping for the container
docker ps 	List containers
docker pull 	Pull an image or a repository from a registry
docker push 	Push an image or a repository to a registry
docker rename 	Rename a container
docker restart 	Restart one or more containers
docker rm 	Remove one or more containers
docker rmi 	Remove one or more images
docker run 	Run a command in a new container
docker save 	Save one or more images to a tar archive (streamed to STDOUT by default)
docker search 	Search the Docker Hub for images
docker secret 	Manage Docker secrets
docker service 	Manage services
docker stack 	Manage Docker stacks
docker start 	Start one or more stopped containers
docker stats 	Display a live stream of container(s) resource usage statistics
docker stop 	Stop one or more running containers
docker swarm 	Manage Swarm
docker system 	Manage Docker
docker tag 	Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
docker top 	Display the running processes of a container
docker trust 	Manage trust on Docker images
docker unpause 	Unpause all processes within one or more containers
docker update 	Update configuration of one or more containers
docker version 	Show the Docker version information
docker volume 	Manage volumes
docker wait 	Block until one or more containers stop, then print their exit codes

https://docs.docker.com/engine/reference/commandline/dockerd/

A self-sufficient runtime for containers.

dockerd is the persistent process that manages containers. Docker uses different binaries for the daemon and client. To run the daemon you type dockerd.

Containerd: a daemon to control runC

Containerd is built on top of the Open Container Initiative’s runC and specification. Containerd is a daemon providing a GRPC API to manage containers on the local system. Containerd leverages runC to provide advanced functionality like checkpoint and restore, seccomp, and user namespace support which will open the door for these features into Docker.

Containerd is built for ops and optimized for performance.

containerd-ctr - Una CLI liviana para comunicarse directamente con containerd. Piense en ello como cómo 'docker' es 'dockerd'.

¿Qué es un “shim” (cuña)? https://en.wikipedia.org/wiki/Shim_(computing)

containerd-shim - Después de que runC realmente ejecuta el contenedor, se cierra (lo que nos permite no tener ningún proceso de larga duración responsable de nuestros contenedores). Shim es el componente que se encuentra entre containerd y runc para facilitar esto.

the path Docker began down back in 2014, when they open-sourced libcontainer (now known as runC).

Basado en collabnix/dockerlabs

• dockerd vs docker-containerd vs docker-runc vs docker-containerd-ctr vs docker-containerd-shim