Re: Can the DPDK multi-process feature be used in Docker containers?

[Staffan Wiklund <staffan491@gmail.com>]

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Cliff,

Many thanks for your help!
Mapping /var/run/dpdk into both containers as you said made it possible to
use the multi-process feature in Docker containers.

Regards
Staffan

Den tors 18 nov. 2021 kl 07:47 skrev Li Feng <fengli@smartx.com>:

> On Thu, Nov 18, 2021 at 2:23 PM Cliff Burdick <shaklee3@gmail.com> wrote:
> >
> > I don't remember that being a problem. Are you starting them with two
> different file prefixes and mounting the hugepages directory into both
> containers?
> >
> I'm running the spdk processes, so the hugepage files are created with
> prefix "spdk-<PID>", both containers are mounting the same
> /dev/hugepages.
>
>
> >
> > On Wed, Nov 17, 2021, 22:20 Li Feng <fengli@smartx.com> wrote:
> >>
> >> On Thu, Nov 18, 2021 at 2:11 PM Cliff Burdick <shaklee3@gmail.com>
> wrote:
> >> >
> >> > Yes. Try mapping the dpdk metadata directory (/var/run/dpdk) into
> both containers from the host. You should be able to do the normal dual
> process methods.
> >> >
> >> By the way, if I want to run two separate dpdk processes in two
> >> different dockers, what should I do?
> >> e.g. Running two processes: examples/dpdk-mp_server
> >> These two dockers have mapped the same /dev/hugepages directories.
> >> I have tested, the dpdk will crash because the hugepages are mixed.
> >>
> >> Thanks.
> >> >
> >> > On Wed, Nov 17, 2021, 05:58 Staffan Wiklund <staffan491@gmail.com>
> wrote:
> >> >>
> >> >> Hello
> >> >>
> >> >> I wonder if it is possible to use the DPDK multi-process feature in
> Docker containers?
> >> >>
> >> >> That is, can a DPDK application execute in a Docker container and
> share its
> >> >> DPDK memory with another DPDK application executing in another
> Docker container
> >> >> using the DPDK multi-process feature?
> >> >>
> >> >> For example if the DPDK example mp_server executes in one Docker
> container:
> >> >> <build_dir>/examples/dpdk-mp_server -l 1-2 -n 4 -- -p 3 -n 2
> >> >>
> >> >> and the DPDK example mp_client executes in another Docker container:
> >> >>
> >> >> <build_dir>/examples/dpdk-mp_client -l 3 -n 4 --proc-type=auto -- -n
> 0
> >> >>
> >> >> Is this possible to implement?
> >> >>
> >> >> Thanks
> >> >> Staffan
> >> >>
> >> >>
>

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