On Thu, Dec 17, 2015, at 10:24 AM, Lennart Poettering wrote:
Can you give realistic examples for these? Can you explain what you
are intend to run as PID 1 in them instead?
Nothing, if the pid namespace did zombie collection in the kernel,
you don't need a separate init.
What is cleaning up /tmp
for those things?
You bind mount the container's /tmp to a host /tmp/container-$uuid
for example.
What is setting up the tmpfiles bits in /run for
them, and so on?
One would carry this in the Dockerfile or equivalent if it applies,
although it doesn't for a lot of software.
Your broader point is very valid - we're going to need a lot
of software to run both on the host outside of a container,
underneath systemd, but we're also trying to enable a
fully container-only distributed/cluster model via Kubernetes/Docker,
and in the end microservice state, it just doesn't make sense
to have a systemd instance per microservice in a cluster.