How do I run a docker image as a container

Question

I am new to Docker. I have built a docker image from a dockerfile.The image was built successfully, but what do I do with it? Shouldn't it be able to run as a container?   Probably I am missing some very basic thing.

Can anyone help me with this?

Thanks.

Answer 1

You can run an image depends on whether you gave the image a tag/name or not.

$ docker images
root@dockertest:~# docker images
REPOSITORY          TAG                 ID                  CREATED             SIZE
ubuntu              12.04               8dbd9e392a96        4 months ago        131.5 MB (virtual 131.5 MB)

With a name for e.g. -  in this case Ubuntu :

$ docker run -i -t ubuntu:12.04 /bin/bash

or you can run it by just using the ID:

$ docker run -i -t 8dbd9e392a96 /bin/bash

I hope it would be helpful for you.

Answer 2

You could probably follow these steps :

1. $ docker images

   you will get list of all local docker images with tags specified.

2. $ docker run image_name:tag_name

   If you didn't specify tag_name it will automatically run image with 'latest' tag.

   Instead of image_name you can also specify Image Id (no tag_name).