artioml/hello-world repository overview

# Install Node.js
curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs
git clone https://github.com/ArtiomL/hello-world.git
cd hello-world
# Install dependencies
npm install
# Run
node index.js &
# Test and crash the app
curl http://127.0.0.1:8080/app
curl http://127.0.0.1:8080/kill
curl http://127.0.0.1:8080/app
# Restore snapshot

# Install Docker CE
curl -fsSL https://get.docker.com | sh
# Manage Docker as a non-root user
sudo usermod -aG docker $USER
# Log out and log back in so that your group membership is re-evaluated

git clone https://github.com/ArtiomL/hello-world.git
cd hello-world
# Build an image from a Dockerfile
docker build -t hello-world .
# List images
docker images

# Pull an image or a repository from a registry (won't work with your own username, yet)
docker pull artioml/hello-world

docker run -dit -p 80:8080 artioml/hello-world
# List running containers
docker ps
# Display listening server sockets (note docker-proxy)
sudo netstat -lnp | grep ':::80'
# Test and crash the app
curl http://127.0.0.1/app
curl http://127.0.0.1/kill
curl http://127.0.0.1/app
# Run again and assign a name
docker run -dit -p 80:8080 --name dhw artioml/hello-world

# Fetch the logs of a container (follow output)
docker logs -f dhw

# Run a command (as root) in a running container
docker exec -it -u 0 dhw /bin/sh
# Update the app
sed -i 's/Node.js app/Node.js app v2.0/' index.js
exit

# Inspect changes to files or directories on a container's filesystem
docker diff dhw

# Create a new image from a container's changes
docker commit dhw artioml/hello-world:2.0

docker images
# Log in to a Docker registry
docker login -u <user> -p <password>
# Push an image to a registry
docker push artioml/hello-world:2.0

# Remove a container
docker rm -f dhw
# Run (new version) and restart if the container exits with a non-zero exit status
docker run -dit -p 80:8080 --name dhw --restart on-failure artioml/hello-world:2.0
# Test and crash the app
curl http://127.0.0.1/app
curl http://127.0.0.1/kill
docker ps
curl http://127.0.0.1/app
docker logs -f dhw

# Display the running processes of a container (note UID)
docker top dhw

# Display a live stream of container(s) resource usage statistics
docker stats dhw

# Kill one or more running containers
docker kill dhw

# Publish all exposed ports to random ports (multiple instances)
for i in {1..3}; do
	docker run -ditP artioml/hello-world:2.0
done
# List running containers and examine the ports
docker ps
# Display listening server sockets (note docker-proxy)
sudo netstat -lnp | grep ':::32'