[jira] [Created] (MESOS-6542) Pull the current "init" process for a container out of the container.

["Kevin Klues (JIRA)" <ji...@apache.org>]

Kevin Klues created MESOS-6542:
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             Summary: Pull the current "init" process for a container out of the container.
                 Key: MESOS-6542
                 URL: https://issues.apache.org/jira/browse/MESOS-6542
             Project: Mesos
          Issue Type: Task
            Reporter: Kevin Klues


Currently the mesos agent is in control of the "init" process launched inside of a container. However, in order to properly support things like systemd-in-a-container, we need to allow users to control the init process that ultimately gets launched.

We will still need to fork a process equivalent to the current "init" process, but it shouldn't be placed inside the container itself (instead, it should be the parent process of whatever init process it is directed to launch).

In order to do this properly, we will need to rework some of the logic in {{launcher->fork()}} to allow this new parent process to do the namespace entering / cloning instead of {{launcher->fork()}} itself.



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