docker push to the registry with changed Dockerfile and same tag
Imagine, I have docker image based on Dockerfile, I will tag & push it into docker registry
Over time, I change Dockerfile (add/change new instructions, ...)
Now, I will tag new image again with the same tag I used in the first place and push it into docker registry
- How does docker registry react to new layers?
- How does docker registry react to changed layers?
- Will it overwrite existing image with the latest version?
- Should I use different tag to make sure I have correct new image in place?
Answer
How does docker registry react to new layers? How does docker registry react to changed layers?
It will function the same as a pull -- unchanged layers will not be pushed again and new layers will be pushed.
Will it overwrite existing image with the latest version?
Yep.
Should I use different tag to make sure I have correct new image in place?
Usually. Using latest to represent the most recent is fine but you should add a second tag for the actual version so that dependent systems can pin to that version and upgrade as needed.