demo docker

demo_docker

# Get image ubuntu:16.04 from Docker's registry
docker pull ubuntu:16.04

# Run "cat /etc/os-release" into container spawned from image ubuntu:16.04
docker run ubuntu:16.04 cat /etc/os-release
cat /etc/os-release

# Show all containers
docker ps -a

# Run interactive bash into container spawned from image ubuntu:16.04
docker run -it ubuntu:16.04
<Ctrl-d>

# Create a helloworld script
cat >helloworld <<EOF
#!/bin/sh
echo "helloworld"
EOF
chmod +x helloworld

# Create a Dockerfile which includes the helloworld script into an ubuntu
cat >Dockerfile <<EOF
FROM ubuntu:16.04
ADD helloworld /
CMD [ "/helloworld" ]
EOF

# Build the image
docker build -t helloworld .

# Run a container from the helloworld image
docker run helloworld

# Run an Nginx webserver with port 80 bound to host 8080
docker run --name nginx -d -p 8080:80  nginx:1.16
docker ps
curl http://localhost:8080
docker stop nginx
docker ps
docker ps -a
docker rm nginx

# Safe Docker cleanup
docker system prune