Docker

Run a docker container

docker run hello-world

Just prints out hello world (good for testing if Docker is working)

docker ps

See what is running

Add “-a” to include stopped containers

docker rm CONTAINER_NAME

Remove a docker container

docker run -it ubuntu

Run the ubuntu Linux operating system

Note: “-it” means to run it as an interactive terminal

docker run -p 80:80 nginx

nginx is a popular static web server

Note: by default, a container is closed to traffic on all ports.

“-p 80:80” says: for traffic coming in on port 80, send it to port 80 inside the container

Docker demo

FROM nginx
COPY . /usr/share/nginx/html

The “Dockerfile” is a definition for a docker container.

It consists of a set of steps, starting “FROM” a specific docker container, and then running additional steps (e.g., copying files) to set up the container the way you want it.

demos

nginx/html

demo/
├── index.html
└── Dockerfile

Dockerfile

FROM nginx
COPY . /usr/share/nginx/html

docker build -t amelial9/dockerdemo .
docker run -d -p 80:80 amelial9/dockerdemo

nodedemo

demo/
├── one-of-the-prev-demos
└── Dockerfile

Dockerfile

FROM node

# equivalent to cd /app
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm install

COPY . .

EXPOSE 3000

ENTRYPOINT ["npm", "start"]

docker build -t amelial9/node-app .
docker run -d -p 4000:3000 amelial9/node-app