Layer already exists when trying to push an image

Question

I have an image that i'm trying to push but gives me a  very weird error.

sudo docker push docker.io/kalginshah/my-apache2
The push refers to a repository [docker.io/kalginshah/my-apache2]
9ca822a18384: Layer already exists 
4913dadb8da4: Layer already exists 
cb187a6f7133: Layer already exists 
13197fce7b91: Layer already exists 
94b0399694b0: Layer already exists 
37c16229e40b: Layer already exists 
83120c5c6d3b: Layer already exists 
8c466bf4ca6f: Layer already exists 
latest: digest: sha256:cc3aa9dd16a694d779c7f7f14e7b8ee8185e1d9ffdfb141190e2eba013a33865 size: 1987

What's the issue?

Answer 1

I think the first time you tried pushing it said "layer mounted" and I'm guessing you tried to push again coz thats when you get this error.

Follow these steps:

1. remove/delete that image

docker rmi --force 'image id'

2. Tag the image

docker tag my-apache2:kalginshah/my-apache2

3. Push is again

docker push kalginshah/my-apache2

Answer 2

Check the image tags, you might have another image with the same tag.

Answer 3

Inspect your images and find two or more with the same tag:

docker images 

Delete them:

docker rmi --force 'image id'

Retag them with the different tag name

Answer 4

I had a similar error. I hadn't tagged my image. I just had to tag it and then push. Worked like a charm