Does "docker run" actually SSH into the container?

Question

If I run

docker run -it ubuntu bash

Does it actually SSH into the container, or does it use another protocol?

No, there is no SSH involved. Docker uses a technology called namespaces to provide the isolated workspace called the container. docs.docker.com/engine/docker-overview/#namespaces — oryades, Aug 21, 2017 at 11:24
@oryades you should think about turning this comment in an answer IMHO. — Tensibai, Aug 21, 2017 at 13:45
As a side note in most cases you want to docker run -it --rm ubuntu su - rather than running bash. Running su - simulates a full login and as a result, initialises some environment variables such as TERM. — Michaël Le Barbier, Aug 21, 2017 at 15:38

Gaius · Accepted Answer · 2017-08-21 11:30:31Z

13

No, it uses an internal "attach protocol" via the Docker daemon.

answered Aug 21, 2017 at 11:30

Gaius

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