CODEWITHSUNDEEP
docker
LaVuna47
LaVuna47

Reputation: 29

Docker understanding

I have following images inside my docker registry:

enter image description here

Lets assume that file-finder image is derived from ls_files. If so, can I tell that file-finder shares 996MB of disk storage with ls_files image and has only 58,72MB of his own storage?

Upvotes: 0

Views: 67

Answers (1)

Saeed
Saeed

Reputation: 4123

No, you assumption is incorrect.

I think your Dockerfile is probably like this:

FROM ls_files
RUN # Your commands, etc.

Then you run:

docker build -t file-finder:1.0.0 .

Now the image file-finder is a complete and stand-alone image. You can remove ls_files with no issue since the image ls_files is now included and downloaded into the file-finder image.

When you build an image on top of another, the base image then has nothing to do with the new image and you can remove the base.

Example

FROM alpine:latest
RUN apk add nginx
ENTRYPOINT ["nginx", "-g", "daemon off"]

Let us run:

docker build -t my_nginx:1 .

Now let us remove alpine:latest image.

docker image rm alpine:latest

Now let's run my_nginx:1 image and you should see no error.

Upvotes: 1

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