ederssouza / docker-quick-commands

Docker quick commands

Docker quick commands

Get Started

For more informations access the official documentation.

Installation

• Install Docker for Mac
• Get Docker CE for Ubuntu
• Install Docker for Windows

Test Docker version

Run docker --version and ensure that you have a supported version of Docker:

$ docker --version
Docker version 18.03.1-ce, build 9ee9f40

Test Docker installation

$ docker run hello-world

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:ca0eeb6fb05351dfc8759c20733c91def84cb8007aa89a5bf606bc8b315b9fc7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.
...

Commands

Create a new container

$ docker run ubuntu

List active containers

$ docker ps

List all containers

$ docker ps -a

Only display numeric IDs -q, --quiet

$ docker ps -q

Create a new container and active interative terminal

$ docker run -it ubuntu

For exit the terminal press Ctrl + d.

Start an container

$ docker start CONTAINER_ID

Start an container with interative terminal

$ docker start -a -i CONTAINER_ID

Stop an container

$ docker stop CONTAINER_ID

Seconds to wait for stop before killing it (default 10) -t, --time int

$ docker stop -t 0 CONTAINER_ID

Stop all active container

$ docker stop -t 0 $(docker ps -q)

Remove container

$ docker rm CONTAINER_ID

Remove all inactive containers

$ docker container prune

List all images

$ docker images

Remove image

$ docker rmi REPOSITORY_NAME

Remove all images

$ docker rmi $(docker images -q)

Run container in background and print container ID --detach option

docker run -d dockersamples/static-site

Publish all exposed ports to random ports -P, --publish-all

$ docker run -d -P dockersamples/static-site
$ docker port CONTAINER_ID

443/tcp -> 0.0.0.0:32768
80/tcp -> 0.0.0.0:32769

Note: 0.0.0.0:32768 = localhost:32768.

Publish a container's port(s) to the host -p, --publish list

# 8080:80 => MY_LOCAL_PORT:DOCKER_CONTAINER_PORT
$ docker run -d -p 8080:80 --name site-sample dockersamples/static-site
$ docker port 08e0b419d760

80/tcp -> 0.0.0.0:8080

Note: 8080 port my machine and 80 port of container.

Assign a name to the container --name string.

$ docker run -d -P --name site-sample dockersamples/static-site
$ docker ps

CONTAINER ID        IMAGE                       COMMAND                  CREATED              STATUS              PORTS                                           NAMES
5c86c9424798        dockersamples/static-site   "/bin/sh -c 'cd /usr…"   About a minute ago   Up About a minute   0.0.0.0:32771->80/tcp, 0.0.0.0:32770->443/tcp   site-sample

Set environment variables -e, --env list

$ docker run -d -p 8080:80 -e AUTHOR="Eder Sampaio" dockersamples/static-site

Open http://localhost:8080 in the browser:

Bind mount a volume -v, --volume list

$ docker run -it -v "/Users/edersampaio/docker-sample:/var/www" ubuntu

Keeps folders and files created in /var/www, same after remove container.

Run container and modify files locally

$ docker run -it -p 3000:3000 -v "/Users/edersampaio/docker-node-sample:/var/www" -w "/var/www" node:9.11.1-alpine npm start

# or

$ cd /Users/edersampaio/docker-node-sample
$ docker run -it -p 3000:3000 -v "$(pwd):/var/www" -w "/var/www" node:9.11.1-alpine npm start

Dockerfile

Create a Dockerfile

# image
FROM node:9.11.1-alpine

# maintainer
LABEL maintainer="[e-mail]"

# copy files
COPY . /var/www

# working directory
WORKDIR /var/www

# install node dependencies and start server
RUN npm install
ENTRYPOINT [ "npm", "start" ]

# export port
EXPOSE 3000

Dockerfile with Node Enviroments

# image
FROM node:9.11.1-alpine

# maintainer
LABEL maintainer="[e-mail]"

# node envs
ENV NODE_ENV=production
ENV PORT=3000

# copy files
COPY . /var/www

# working directory
WORKDIR /var/www

# install node dependencies and start server
RUN npm install
ENTRYPOINT [ "npm", "start" ]

# export port
EXPOSE $PORT

Create image

$ docker build -f Dockerfile -t ederssouza/node-alpine .

# or

$ docker build -t ederssouza/node-alpine .

Run container

$ docker run -d -p 8080:3000 ederssouza/node-alpine

Docker Hub

Publishing your image on Docker Hub

# entry with your login and password
$ docker login
Login Succeeded

$ docker push ederssouza/node-alpine

Downloading image of Docker Hub

$ docker pull ederssouza/node-alpine

Docker networking