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Posted to dev@slider.apache.org by Billie Rinaldi <bi...@gmail.com> on 2017/07/05 14:36:16 UTC

Re: How slider-agent receives stop command

The Slider agent should receive a stop command from the Slider AM. I am not
sure what the agent does with the stop command in the case of docker
containers. Also, I think the AM proceeds to release the containers whether
or not the graceful stop has been completed. There seems to be a global
property in the appConfig, site.global.app_container.release_timeout_secs,
that controls how long the AM will wait between issuing the stop command to
the agents and telling the RM to release the containers.

On Tue, Jul 4, 2017 at 12:11 AM, Chengeng Ou <cg...@freewheel.tv> wrote:

> Hi, community.
> I’d like to ask a question, since I’ve met some problems when using Slider.
> How slider-agent receives stop command after I execute ‘slider stop xxx’
> by slider client command. Does slider-agent receive commands directly from
> slider-master, or does it just listen and monitor a state change of
> zookeeper  node?  The reason why I ask this question is that my docker
> containers fail to be stopped by Slider, so I’d like to troubleshooting
> this problem.
>
> Hope for your reply.
>
> Thanks,
> Chengeng Ou
>

Re: How slider-agent receives stop command

Posted by Chengeng Ou <cg...@freewheel.tv>.

Thanks for your reply and explanation. It helps a lot.
I’ve figured out the cause. Slider-agent cannot recognize ‘stop docker’ command from AM due to there’s no docker entry in stop_command, so the only chance to kill a docker is when shutdown slider-agent.

I think there are two things to improve. The first one is to make slider-agent can recognize the ‘stop docker’ command, please have a look at my last issue and patch (https://issues.apache.org/jira/browse/SLIDER-1232).
The second is to implement graceful stop for docker after slider-agent receiving stop command. I’m still working on it.

Thanks,
Chengeng Ou

在 17/7/5 22:36，“Billie Rinaldi”<bi...@gmail.com> 写入:

    The Slider agent should receive a stop command from the Slider AM. I am not
    sure what the agent does with the stop command in the case of docker
    containers. Also, I think the AM proceeds to release the containers whether
    or not the graceful stop has been completed. There seems to be a global
    property in the appConfig, site.global.app_container.release_timeout_secs,
    that controls how long the AM will wait between issuing the stop command to
    the agents and telling the RM to release the containers.

    On Tue, Jul 4, 2017 at 12:11 AM, Chengeng Ou <cg...@freewheel.tv> wrote:

    > Hi, community.
    > I’d like to ask a question, since I’ve met some problems when using Slider.
    > How slider-agent receives stop command after I execute ‘slider stop xxx’
    > by slider client command. Does slider-agent receive commands directly from
    > slider-master, or does it just listen and monitor a state change of
    > zookeeper  node?  The reason why I ask this question is that my docker
    > containers fail to be stopped by Slider, so I’d like to troubleshooting
    > this problem.
    >
    > Hope for your reply.
    >
    > Thanks,
    > Chengeng Ou
    >