>Is there a way for a process in the docker container to determine how many cpus it has been allocated? Because docker limit the resource before start the container, I think there isn't a way to change container resource usage after it has already run. You only could allocate resource before launch a container so far. On Sep 23, 2015 10:31 PM, "Clarke, Trevor" <[email protected]> wrote:
> That's just the scheduler...I did locate the appropriate docker run call > and it appears that mesos cpu offer * 1024 is used as the cpu share so > there's no hard enforcement of total cpus but the scheduler block is scaled > to the number of requested cpus. It also appears there's no way to > determine the cpu share from within docker without explicitly passing an > environment variable, etc. > ------------------------------ > *From:* Guangya Liu [[email protected]] > *Sent:* Wednesday, September 23, 2015 9:41 AM > *To:* [email protected] > *Subject:* Re: how does resource allocation work with docker? > > Hi Clarke, > > You can take a look at the framework for docker here > https://github.com/apache/mesos/blob/master/src/examples/docker_no_executor_framework.cpp > <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_apache_mesos_blob_master_src_examples_docker-5Fno-5Fexecutor-5Fframework.cpp&d=AwMFaQ&c=jF7FvYH6t0RX1HrEjVCgHQ&r=BZAdW7eZ7BA-TVm8CsncxQ&m=myFl_koVz_iyPrvAE5EQBW4Cmn4ocS6C5KCd07WzvjA&s=PWUrWtXV7HgaC4GxJ0HstRpy_b9dqvCptTljtTzQrx0&e=> > > All of the resource limitations for a docker task should be defined in the > framework. > > Thanks, > > Guangya > > On Wed, Sep 23, 2015 at 9:33 PM, Clarke, Trevor <[email protected]> wrote: > >> When a framework accepts an offer and starts a docker task, how does >> mesos enforce the task's allocated cpus? Is CPU share used and scaled >> appropriately? Are cpu sets explicitly specified to limit execution to the >> allocated cpus? Is there a way for a process in the docker container to >> determine how many cpus it has been allocated? (so it can adjust fan-out >> size, etc. for optimal execution) >> >> >> This message and any enclosures are intended only for the addressee. >> Please >> notify the sender by email if you are not the intended recipient. If you >> are >> not the intended recipient, you may not use, copy, disclose, or >> distribute this >> message or its contents or enclosures to any other person and any such >> actions >> may be unlawful. Ball reserves the right to monitor and review all >> messages >> and enclosures sent to or from this email address. >> > > > > This message and any enclosures are intended only for the addressee. > Please > notify the sender by email if you are not the intended recipient. If you > are > not the intended recipient, you may not use, copy, disclose, or distribute > this > message or its contents or enclosures to any other person and any such > actions > may be unlawful. Ball reserves the right to monitor and review all > messages > and enclosures sent to or from this email address. >
