Docker – Vipin V

Getting Started {.cols-2}

Getting started

Create and run a container in background

$ docker run -d -p 80:80 docker/getting-started

-d - Run the container in detached mode
-p 80:80 - Map port 80 to port 80 in the container
docker/getting-started - The image to use {.marker-none}

Create and run a container in foreground

$ docker run -it -p 8001:8080 --name my-nginx nginx

-it - Interactive bash mode
-p 8001:8080 - Map port 8001 to port 8080 in the container
--name my-nginx - Specify a name
nginx - The image to use {.marker-none}

General commands

Example	Description
`docker ps`	List running containers
`docker ps -a`	List all containers
`docker ps -s`	List running containers (with CPU / memory)
`docker images`	List all images
`docker exec -it <container> bash`	Connecting to container
`docker logs <container>`	Shows container's console log
`docker stop <container>`	Stop a container
`docker restart <container>`	Restart a container
`docker rm <container>`	Remove a container
`docker port <container>`	Shows container's port mapping
`docker top <container>`	List processes
`docker kill <container>`	Kill a container

Parameter <container> can be container id or name

Docker Containers {.cols-2}

Starting & Stopping

Description	Example
`docker start my-nginx`	Starting
`docker stop my-nginx`	Stopping
`docker restart my-nginx`	Restarting
`docker pause my-nginx`	Pausing
`docker unpause my-nginx`	Unpausing
`docker wait my-nginx`	Blocking a Container
`docker kill my-nginx`	Sending a SIGKILL
`docker attach my-nginx`	Connecting to an Existing Container

Information

Example	Description
`docker ps`	List running containers
`docker ps -a`	List all containers
`docker logs my-nginx`	Container Logs
`docker inspect my-nginx`	Inspecting Containers
`docker events my-nginx`	Containers Events
`docker port my-nginx`	Public Ports
`docker top my-nginx`	Running Processes
`docker stats my-nginx`	Container Resource Usage
`docker diff my-nginx`	Lists the changes made to a container.

Creating

docker create [options] IMAGE
  -a, --attach               # attach stdout/err
  -i, --interactive          # attach stdin (interactive)
  -t, --tty                  # pseudo-tty
      --name NAME            # name your image
  -p, --publish 5000:5000    # port map (host:container)
      --expose 5432          # expose a port to containers
  -P, --publish-all          # publish all ports
      --link container:alias # linking
  -v, --volume `pwd`:/app    # mount (absolute paths needed)
  -e, --env NAME=hello       # env vars

Example

$ docker create --name my_redis --expose 6379 redis:3.0.2

Manipulating

Renaming a Container

docker rename my-nginx my-nginx

Removing a Container

docker rm my-nginx

Updating a Container

docker update --cpu-shares 512 -m 300M my-nginx

Docker Images {.cols-2}

Manipulating

`Example`	Description
`docker images`	Listing images
`docker rmi nginx`	Removing an image
`docker load < ubuntu.tar.gz`	Loading a tarred repository
`docker load --input ubuntu.tar`	Loading a tarred repository
`docker save busybox > ubuntu.tar`	Save an image to a tar archive
`docker history`	Showing the history of an image
`docker commit nginx`	Save a container as an image.
`docker tag nginx eon01/nginx`	Tagging an image
`docker push eon01/nginx`	Pushing an image

Building Images

$ docker build .
$ docker build github.com/creack/docker-firefox
$ docker build - < Dockerfile
$ docker build - < context.tar.gz
$ docker build -t eon/my-nginx .
$ docker build -f myOtherDockerfile .
$ curl example.com/remote/Dockerfile | docker build -f - .

Docker Networking {.cols-2}

Manipulating

Removing a network

docker network rm MyOverlayNetwork

Listing networks

docker network ls

Getting information about a network

docker network inspect MyOverlayNetwork

Connecting a running container to a network

docker network connect MyOverlayNetwork nginx

Connecting a container to a network when it starts

docker run -it -d --network=MyOverlayNetwork nginx

Disconnecting a container from a network

docker network disconnect MyOverlayNetwork nginx

Creating Networks

docker network create -d overlay MyOverlayNetwork
 
docker network create -d bridge MyBridgeNetwork
 
docker network create -d overlay \
  --subnet=192.168.0.0/16 \
  --subnet=192.170.0.0/16 \
  --gateway=192.168.0.100 \
  --gateway=192.170.0.100 \
  --ip-range=192.168.1.0/24 \
  --aux-address="my-router=192.168.1.5" \
  --aux-address="my-switch=192.168.1.6" \
  --aux-address="my-printer=192.170.1.5" \
  --aux-address="my-nas=192.170.1.6" \
  MyOverlayNetwork

Clean Up {.cols-2}

Clean All

Cleans up dangling images, containers, volumes, and networks (ie, not associated with a container)

docker system prune

Additionally, remove any stopped containers and all unused images (not just dangling images)

docker system prune -a

Containers

Stop all running containers

docker stop $(docker ps -a -q)

Delete stopped containers

docker container prune

Images

Remove all dangling (not tagged and is not associated with a container) images:

docker image prune

Remove all images which are not used by existing containers

docker image prune -a

Volumes

docker volume prune

Remove all volumes not used by at least one container

Miscellaneous {.cols-2}

Docker Hub

Docker Syntax	Description
`docker search search_word`	Search docker hub for images.
`docker pull user/image`	Downloads an image from docker hub.
`docker login`	Authenticate to docker hub
`docker push user/image`	Uploads an image to docker hub.

Registry commands {.row-span-3}

$ docker login
$ docker login localhost:8080

Logout from a Registry

$ docker logout
$ docker logout localhost:8080

Searching an Image

$ docker search nginx
$ docker search nginx --stars=3 --no-trunc busybox

Pulling an Image

$ docker pull nginx
$ docker pull eon01/nginx localhost:5000/myadmin/nginx

Pushing an Image

$ docker push eon01/nginx
$ docker push eon01/nginx localhost:5000/myadmin/nginx

Batch clean

Example	Description
`docker stop -f $(docker ps -a -q)`	Stopping all containers
`docker rm -f $(docker ps -a -q)`	Removing all containers
`docker rmi -f $(docker images -q)`	Removing all images

Volumes

Check volumes

$ docker volume ls

Cleanup unused volumes

$ docker volume prune

PHP YAML