Docker Lifecycle

When we run a docker container using run command,

docker run image_name

Then, the docker run is equivalent to the following 2 commands:

1. docker create
2. docker start

With docker create, the file system snapshot of the image is being copied to isolated physical storage.

Then with docker start we start the container.

Example :

Let's do the hands on what we are claiming with a image hello-world.

docker create hello-world

This will return the id of the created container.

Using the id we can now start the docker.

docker start -a id

This will give us the output Hello from Docker!.

Here the -a flag watch out the container output and print it in console.