Installing Kubedge Blinkt

Install Kubedge Blinkt Application on the PI Cluster

Key Aspects

  • Install Blinkt
  • Test access to Blinkt

Deploy Using helm

helm repo add kubedge1 "https://raw.githubusercontent.com/kubedge/helmrepos/arm32v7/kubedge1"
helm repo update

Apply the labels to the nodes

Ensure the right labels have been applied to the nodes where Blinkt is installed

For instance:

kubectl label nodes kubemaster-pi blinktInstalled=true
kubectl label nodes home-pi blinktInstalled=true
kubectl label nodes nas-pi blinktInstalled=true

Direct installation from the repo

If you feel lucky:

helm install kubedge1/kubesim-blinkt-arm32v7 --name blinkt

Two steps installation from local

If you want to better understand the setup:

cd $MY_LOCAL_HELM_CHARTS
helm fetch kubedge1/kubesim-blinkt-arm32v7
tar xvf kubesim-blinkt-arm32v7-0.1.0.tgz
cd kubesim-blinkt-arm32v7/
helm install . --name blinkt

Replica Control

Ensure the right labels have been applied to the nodes where Blinkt is installed

helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set blinkt.algorithm=blinkt5 --set replicaCount=2
helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set blinkt.algorithm=blinkt5 --set replicaCount=3
helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set blinkt.algorithm=blinkt5 --set replicaCount=0

Rolling Upgrade

Use blinkt coloring to highlight rolling upgrade

helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set replicaCount=3 --set blinkt.release=green
helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set replicaCount=3 --set blinkt.release=blue
helm upgrade blinkt kubedge1/kubesim-blinkt-arm32v7 --set image.pullPolicy=IfNotPresent --set replicaCount=3 --set blinkt.release=red

Rollback

$ helm history blinkt
REVISION        UPDATED                         STATUS          CHART                           DESCRIPTION
....
16              Fri Nov  2 21:33:30 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
17              Sat Nov  3 02:00:18 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
18              Sat Nov  3 02:22:11 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
19              Sat Nov  3 02:23:11 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
20              Sun Nov  4 15:16:33 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
21              Mon Nov  5 00:11:42 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
22              Mon Nov  5 00:11:56 2018        SUPERSEDED      kubesim-blinkt-arm32v7-0.1.0    Upgrade complete
23              Mon Nov  5 00:13:41 2018        DEPLOYED        kubesim-blinkt-arm32v7-0.1.0    Upgrade complete

$ helm rollback blinkt 18

Rollback was a success! Happy Helming!

Source Code

The images creation scripts are availble under:

Cleanup

$ helm delete --purge blinkt

release "blinkt" deleted

Conclusion

WIP