Unable to update docker on CentOS7 myobt-containerd conflicts with containerd.io
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If you go to the Docker web site and view the instructions for installing or updating Docker, it starts with checking and updating the prerequisites, uninstalling the existing (old) install of Docker, then installing the latest (current) version.
Did you check and follow those instructions?
It discusses CentOS 7 as a minimum, and the requirement is that the version be under current support. (I would presume considered under support of and by the CentOS team at RedHat) If that is the only restriction, it SHOULD work under CentOS 8.
I note also that it mentions nothing about NOT working with CentOS 8, but I understand your reluctance to experiment.
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