The difference between Kubernetes, OpenShift, Docker Swarm are as follows:-
It supports PaaS
Add-on over kubernetes
There is an option to grant access rights to containers.
There is a web console. (many functions are not available).
More advanced management of the caster cluster utility oc.
Docker swarm also supports CaaS
Easy to set up
Atom unit service
Works with docker-compose
The possibility of working in multi-centres is provided by the Third-party service federation.
Docker Data Centre
To know more about all the concepts of docker in-depth and to grab a valuable certificate in it.you can have a look at the following Docker Training Course. If you like to read then you can read the following tutorial on Docker. To watch the free video tutorials on Docker you can visit the below-mentioned website:-