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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