Kubernetes – Using Docker Inside a Pod with Containerd

You do not need to perform each time docker run.

docker run is actually a sequence of two commands: "create" and "start".

When you run the container, you must specify the "-it":

-i, --interactive=false Keep STDIN open even if not attached
-t, --tty=false Allocate a pseudo-TTY

Example:

docker run -it debian:stable bash

After the work was completed command specified at startup (in my example bash). For example, you perform the "exit". Container stops:

CONTAINER ID        IMAGE                      COMMAND                CREATED             STATUS                     PORTS               NAMES
1329c99a831b        debian:stable              "bash"                 51 seconds ago      Exited (0) 1 seconds ago                       goofy_bardeen

Now you can start it again

docker start 1329c99a831b

The container is started and again executes the command "bash".
Connect to this session "bash" with the command

docker attach 1329c99a831b

To sum up: you have to understand the difference between the run and start container.
Besides, look at the documentation for the role of parameters "-i t" and "-d" for the "Run"

The very idea of pods is that of co-location, that is, being able to define compute-locality where it makes sense (or where it's needed). So, no, per definition, since all containers in a pod will be scheduled on the same node, a pod can not span nodes.

See also my critique of pods here. Having said that, we've introduced the pods concept in DC/OS now with v1.9 as well. There seems to be a certain demand, but my hunch (since I don't have data on it) is that it's mostly a sort of safety blanket for cases where one doesn't or can't go all in, cloud-native wise.