如何启动我从另一个人那里获得的Docker容器？

Question

I am a Docker-newbie and I've got a project from another developer including a Dockerfile. This shall give me the Virtual Machine to continue work with the (nodeJS-) project inside this project folder.

Docker is already installed on my machine. How can I launch this container now?

I've read about a command

sudo docker run -name my_first_instance

but i can't find any container name in the Dockerfile.

Answer 1

The dockerfile will create an image for you that you can launch containers from. this being said , Follow this:

Create a folder.

Copy dockerfile in the folder

cd into the folder execute the following command:

docker build -t <your desired image name> .

This will create an image using directives in the dockerfile in the current folder.

Now launch a container from the image.

docker run -d --name <your container name> <imagename from previous step> <optional startup commands>

Useful docker commands:

You can expose ports in the previous command using -p switch.

You can list Images via docker images

You can list running containers via docker ps

you can list running + exited containers via docker ps -a

Answer 2

have a look at

https://hub.docker.com/_/node/

it is the official repository for NodeJS docker images

If you want some docker images based on NodeJS, you will need to pull them docker pull my_node_image

Then you can launch one with such a command

docker run -it --rm --name my-running-script -v "$PWD":/usr/src/app -w /usr/src/app node:4 node your-daemon-or-script.js

The Dockerfile is just the recipe to build a docker image, for Nginx, Mysql, MongoDb, Redis, Wordpress, Spotify, atop, htop...

If docker images shows nothing, it means you have not yet pulled any docker image.