[
https://issues.apache.org/jira/browse/MESOS-2183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14296106#comment-14296106
]
Jay Buffington edited comment on MESOS-2183 at 1/29/15 12:10 AM:
-----------------------------------------------------------------
Hey [~tnachen], I read your doc at
https://docs.google.com/document/d/1_1oLHXg_aHj_fYCzsjYwox9xvIYNAKIeVjO5BFxsUGI/edit#
and it's not clear you address the issue I encountered. In my mesos-slave
running in coreos I have it:
* running inside a pid namespace
* using the mounted /var/run/docker.sock to start a sibling container
* running docker inspect to get the pid it just launched
* it sees that the pid docker inspect reports
* it tries to determine the libprocess port based on that pid
* it doesn't see that pid since the pid docker inspect returns is only
visible in the root namespace
* it does docker stop/kill because it incorrectly thinks the executor
failed to start since it couldn't see the pid
I don't understand how your patch addresses that issue. Can you give me a
summary of how it fixes this problem I've described?
was (Author: jaybuff):
Hey [~tnachen], I read your doc at
https://docs.google.com/document/d/1_1oLHXg_aHj_fYCzsjYwox9xvIYNAKIeVjO5BFxsUGI/edit#
and it's not clear you address the issue I encountered. In my mesos-slave
running in coreos I have it:
* running inside a pid namespace
* useing the mounted /var/run/docker.sock to start a sibling container
* running docker inspect to get the pid it just launched
* it sees that the pid docker inspect reports
* it tries to determine the libprocess port based on that pid
* it does see that pid since the pid docker inspect returns is only visible
in the root namespace
* it does docker stop/kill because it incorrectly thinks the executor
failed to start since it couldn't see the pid
I don't understand how your patch addresses that issue. Can you give me a
summary of how it fixes this problem I've described?
> docker containerizer doesn't work when mesos-slave is running in a container
> ----------------------------------------------------------------------------
>
> Key: MESOS-2183
> URL: https://issues.apache.org/jira/browse/MESOS-2183
> Project: Mesos
> Issue Type: Bug
> Components: containerization, docker
> Reporter: Jay Buffington
> Assignee: Timothy Chen
>
> I've started running the mesos-slave process itself inside a docker
> container. I bind mount in the dockerd socket, so there is only one docker
> daemon running on the system.
> The mesos-slave process uses "docker run" to start an executor in another,
> sibling, container. It asks "docker inspect" what the pid of the executor
> running in the container is. Since the mesos-slave process is in its own pid
> namespace, it cannot see the pid for the executor in /proc. Therefore, it
> thinks the executor died and it does a docker kill.
> It looks like the executor pid is also used to determine what port the
> executor is listening on.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
