Helm Chart Demonstration Resources

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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STEP 1:

Package the cloudacademy-webapp chart

helm package cloudacademy-webapp

STEP 2:

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

STEP 3:

Examine newly created Helm chart release, and all cluster created resources

helm ls

kubectl get all

STEP 4:

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"

STEP 5:

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"

STEP 6:

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"

STEP 7:

Examine the ca-demo1 release history

helm history ca-demo1

STEP 8:

Rollback the ca-demo1 release to previous version

helm rollback ca-demo1

STEP 9:

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"

STEP 10:

Uninstall the ca-demo1 release

helm uninstall ca-demo1