The following instructions are used to demonstrate how to build, package, and install a Helm 3 custom chart.
The custom cloudacademy-webapp Helm chart when installed creates the following cluster resources:
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Package the cloudacademy-webapp chart
helm package cloudacademy-webapp
Install the cloudacademy-webapp chart into Kubernetes cluster
Note: assumes that you have a cluster credentials configured within your local ~/.kube/config file
helm install ca-demo1 cloudacademy-webapp-0.1.0.tgz
Examine newly created Helm chart release, and all cluster created resources
helm ls
kubectl get all
Perform an HTTP GET request, send it to the newly created cluster service and confirm that the response containse the CloudAcademy DevOps 2020 v1 message stored in the values.yaml file
kubectl run --image=busybox bbox1 --rm -it --restart=Never \
-- /bin/sh -c "wget -qO- http://ca-demo1-cloudacademy-webapp"
Perform a Helm upgrade on the ca-demo1 release
helm upgrade ca-demo1 cloudacademy-webapp-0.1.0.tgz \
--set nginx.conf.message="Helm Rocks"
Perform another HTTP GET request. Confirm that the response now has the updated message Helm Rocks
kubectl run --image=busybox bbox1 --rm -it --restart=Never \
-- /bin/sh -c "wget -qO- http://ca-demo1-cloudacademy-webapp"
Examine the ca-demo1 release history
helm history ca-demo1
Rollback the ca-demo1 release to previous version
helm rollback ca-demo1
Perform another HTTP GET request. Confirm that the response has now been reset to the CloudAcademy DevOps 2020 v1 message stored in the values.yaml file
kubectl run --image=busybox bbox1 --rm -it --restart=Never \
-- /bin/sh -c "wget -qO- http://ca-demo1-cloudacademy-webapp"
Uninstall the ca-demo1 release
helm uninstall ca-demo1