Dockerfile demo

This project showcases how we can run a simple bash script inside a docker container.

The repo has two relevant files:

• Dockerfile a Dockerfile used to containerize the hello.sh script
• hello.sh a simple bash script which executes some commands

1. Write your first Dockerfile

Do the following steps:

• open the Dockerfile
• add the 4 missing instructions

2. Build & run

• build the docker image
• run a docker container using the new image
• change the name which gets printed out to your name

3. Tag & push the image

• tag the previously created image with a tag pointing to your Dockerhub repo and give it a version tag as well, ex 1.0.0
• use this tag to push the image to your docker repo

4. Verify access to the outside world

• try to run curl https://www.google.com inside the container ( append at the end of the docker run command)
• analyze and try to fix the issues
• build the image with the tag: hello-app:test
• run it with curl

5. Delete the created image

• after testing delete the image: docker image rm hello-app:test

Useful commands:

• Build the image with a tag docker build -t hello-app .
• Run a docker container docker run --rm --name hello hello-app
• Run a docker container with a custom env property docker run --rm --name hello -e "NAME=bob" hello-app
• Check running container docker ps
• Tag with fully qualified name docker tag hello-app:latest <your-dockerhub-repo>/hello-app:1.0.0
• Push to dockerhub docker push <your-dockerhub-repo>/hello-app:1.0.0
• Pull from dockerhub docker pull <your-dockerhub-repo>/hello-app:1.0.0
• Stop a docker container docker stop hello