Sounds like subtly differences in the tests that make the performance metric
more realistic for kube and more like a theoretical max test when you run
docker measurements.
Two ways to even the playing field:
1) If you run the test inside the kube pod does it have the same performance as
the pure docker on the same machine test ? My thought is that it would be then
close to the same perf as the docker test .
2) if you expose docker test containers through the VM , and access it from a
separate VM is it still 4x faster?
My hypothesis is that it might still be faster then kube vxlan but probably not
4x faster.
Remember: inside the same pod things will always be faster and that's a good
way to optimize the kube VXlan performance in the real world.
> On Sep 19, 2017, at 2:21 AM, vnarasim...@broadsoft.com wrote:
>
> Environment:
>
> Kubernetes version (use kubectl version):
> kubectl version
> Client Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.3",
> GitCommit:"2c2fe6e8278a5db2d15a013987b53968c743f2a1", GitTreeState:"clean",
> BuildDate:"2017-08-03T07:00:21Z", GoVersion:"go1.8.3", Compiler:"gc",
> Platform:"linux/amd64"}
> Server Version: version.Info{Major:"1", Minor:"6", GitVersion:"v1.6.9",
> GitCommit:"a3d1dfa6f433575ce50522888a0409397b294c7b", GitTreeState:"clean",
> BuildDate:"2017-08-23T16:58:45Z", GoVersion:"go1.7.6", Compiler:"gc",
> Platform:"linux/amd64"}
>
> Cloud provider or hardware configuration**:
>
> Google Container Engine.
>
> What happened:
>
> We are in testing phase of springboot based microservice deployment on GKE.
> During testing QA filed a performance issue , stats that the throughput of
> the service in k8s is low when compared to run the java app in
>
> java -jar method
> docker run
> For testing i skip those springboot stuff and take native tomcat home page as
> the test bed for the "ab" testing.
>
> The test setup looks like:
>
> Create an 8cpu/30Gig RAM ubuntu server in GCP and install native
> tomact-8.5.20(80) and test the home page.
>
> Stop the native tomcat. Create the docker tomcat instances on the same host
> and test the same home page.
> The docker version is: Version: 17.06.2-ce
>
> Create the 3 node K8s cluster 1.6.9. Run the tomcat deployment the same
> 8.5.20 and expose the service through LB and test the same home page.
>
> I install the ab tool in other GCP instances and hit the above 3 different
> endpoints.
>
> What's the Result:
>
> The first 2 test with native tomcat and docker run the throughput i got is
> nearly 8k Req/sec on avg on different request/concurrent level.
>
> But the same on K8s LB the throughput i got on the average of 2k req/sec on
> avg on different request/concurrency level.
>
> Is this something am i missing on the test. Or this is how the GKE LB store
> and forward the request at this rate.
>
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