/docker-notes

Notes on Docker

Docker Notes

Basics

Task Command
List Images docker images -a
Remove Image docker rmi Image
Remove All Images docker system prune -a
List All Containers docker ps -a
List Running Containers docker ps
List Stopped Containers docker ps --filter "status=exited"
Remove Container docker rm [container id]
Run a container docker run -p 3000:3000 geocolumbus/webby
Remove all Containers docker container prune -y
Connect to mongo mongo mongodb://mongo:27017/dev-environment -u application -p test
Shell into container docker exec -it <container> /bin/sh

Create a Node Image

  1. Create this Dockerfile:

    FROM node:12
EXPOSE: 3000

  2. Build the project

    docker build -t my-nodejs-app .

  3. Run the project

    You can type .exit to quit.

    docker run -it --rm --name my-running-app my-nodejs-app

  4. Run docker images -a to see the node container.

    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
my-nodejs-app       latest              28d7ff5c0c61        43 seconds ago      913MB
node                12                  839a5e8f04b4        3 days ago          913MB

Composing

In your node project directory, create a docker-compose.yml file

version: "2"
services:
  node:
    image: "node:12"
    user: "node"
    working_dir: /home/node/app
    environment:
      - NODE_ENV=production
    volumes:
      - ./:/home/node/app
    expose:
      - "8081"
    command: "npm start"

Run the node source code in the current directory (assumes that package.json has "start" configured properly and the node_modules is present).

docker-compose up -d

Exporting Images

Example of creating a dockerized UI, saving it as a tar file, then importing it and running it.

vue create hello-world
cd hello-world
npm run build
cat > Dockerfile

FROM node:16
WORKDIR /app
COPY dist .
RUN npm install -g serve
CMD ["serve"]

docker build -t vue1 .

docker image save -o vue1.tar e366ac54d050
docker image rm e366ac54d050
docker load -i vue1.tar
docker run -p 3000:3000 vue1

List of Docker Platforms

arm32v6
arm32v7
arm64v8
amd64

arm32v5
ppc64le
s390x
mips64le
riscv64
i386

Reference