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by goku12 993 days ago
I always thought containerization - including docker - was the result of Linux namespaces (more so than even cgroups). Checking again, Linux namespaces were introduced in 2002. Docker was released more than a decade later - in 2013. I believe that Docker always used namespaces - that's how they achieved process isolation. But they didn't use it to its full potential initially - including network namespaces and pods.
1 comments

Unprivileged user namespaces are much newer.
Thanks for mentioning that.