Why measure memory footprint?
- This platform is designed for a light-weight edge computing deployment, capable of running on devices with few resources (for example, 256MB RAM)
- It is important to know when deploying many pods that it showcases as little memory footprint as possible
- Resident Set Size (RSS)
How to test
After deployment and provisioning of KubeEdge cloud and edge components in 2 VM’s (supported and tested over Ubuntu 16.04) respectively, start deploying pods from 0 to 100 in steps of 5. Keep capturing above KPI’s using standard linux
ps commands, after each step.
Fig 1: KubeEdge Test Setup
Creating a setup
- Host machine’s or VM’s resource requirements can mirror the edge device of your choice
- Resources used for above setup are 4 CPU, 8GB RAM and 200 GB Disk space. OS is Ubuntu 16.04.
- Docker image used to deploy the pods in edge, needs to be created. The steps are:
- Go to github.com/kubeedge/kubeedge/edge/hack/memfootprint-test/
- Using the Dockerfile available here and create docker image (
- Execute the docker command
sudo docker build --tag "perftestimg:v1" ., to get the image.
For KubeEdge Cloud and Edge:
Please follow steps mentioned in KubeEdge README.md
For docker image:
Deploy docker registry to either edge on any VM or host which is reachable to edge. Follow the steps mentioned here: https://docs.docker.com/registry/deploying/
perftestimg:v1docker image on the above mentioned host
Then push this image to docker registry using
docker pushcommands (Refer: Same docker registry url mentioned above) [Use this image’s metadata in pod deployment yaml]
Check edge node is connected to cloud. In cloud console/terminal, execute the below command
root@ubuntu:~/edge/pod_yamls# kubectl get nodes NAME STATUS ROLES AGE VERSION 192.168.20.31 Unknown <none> 11s ubuntu NotReady master 5m22s v1.14.0
On cloud, modify deployment yaml (github.com/kubeedge/kubeedge/edge/hack/memfootprint-test/perftestimg.yaml), set the image name and set spec.replica as 5
sudo kubectl create -f ./perftestimg.yamlto deploy the first of 5 pods in edge node
sudo kubectl get pods | grep Running | wcto check if all the pods come to Running state. Once all pods come to running state, go to edge VM
On Edge console, execute
ps -aux | grep edgecore. The output shall be something like:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 102452 1.0 0.5 871704 42784 pts/0 Sl+ 17:56 0:00 ./edgecore root 102779 0.0 0.0 14224 936 pts/2 S+ 17:56 0:00 grep --color=auto edge
Collect %CPU, %MEM and RSS from respective columns and record
Repeat step 2 and this time increase the replica by 5
This time execute
sudo kubectl apply -f <PATH>/perftestimg.yaml
Repeat steps from 4 to 6.
Now repeat steps from 7 to 9, till the replica count reaches 100