This is a conceptual question because I am not sure that I have understood this correctly.
So if I keep my own image server, and I set the local copies of images as auto-update, I can verify that indeed the local copies of the images are updated to the latest version.
However, I thought that, being the containers’ file system mainly hardlinks to the image files, if the image is updated I thought that the container would be also updated.
As I first understood this image updating concept I thought that it would be great use case for, e.g. keeping many containers linked to a single image, then update/upgrade the image OS and all containers would be updated, too.
But I have done a couple of tests, and yes, the images are updated, but some how the links from the containers get lost, so they become independent.
That means that if I have 20 containers running ubuntu 18.04 , I would have to run apt-get upgrade in each one of them?
Any clarification/confirmation would be great. Maybe I am doing something wrong? I am using aliases for referencing images.
Many thanks, best