CloudDrove created this HelmChart so that One can deploy as many as application with common template and separate override-values.yaml for each application

Below is an installer script that will automatically grab the latest version of Helm and install it locally.

$ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
$ chmod 700 get_helm.sh
$ ./get_helm.sh

Binary downloads of the Helm client can be found on the Releases page. For installation in different Operating Systems you can follow this guide.

helmchart
├── Chart.yaml
├── README.md
├── templates
│   ├── configmap.yaml
│   ├── cronjob.yaml
│   ├── deployment.yaml
│   ├── gateway.yaml
│   ├── _helpers.tpl
│   ├── hpa.yaml
│   ├── ingress.yaml
│   ├── NOTES.txt
│   ├── poddisruptionbudget.yaml
│   ├── pvc.yaml
│   ├── pv.yaml
│   ├── secret.yaml
│   ├── serviceaccount.yaml
│   ├── servicemonitor.yaml
│   ├── service.yaml
│   ├── storageclass.yaml
│   ├── tests
│   │   └── test-connection.yaml
│   └── virtualservice.yaml
├── values.schema.json
└── values.yaml

• Chart.yaml : It contains a description of the chart such as Chart's version appVersion etc.

• templates/ : This directory is for YAML files for Kubernetes resources to be created using this chart.

• tests : This directory contains a yaml file for creating a pod to test the cluster accessibility and networking related configurations.

• values.yaml : This file is important to templates and contains the default values for a chart. These values can be overridden by users in helmchart/config/override-values.yaml and then can be used during helm install/upgrade by specifying path of this override-values.yaml.

1. Add clouddrove helm repository in your local.

    $ helm repo add clouddrove https://charts.clouddrove.com/ 

2. Update the clouddrove helm repo.

    $ helm repo update clouddrove

3. Get the overrides-values.yaml from HERE.

4. Change the attributes in override-app1-values.yaml as per your requirement. Some changes are given below

    replicaCount: 2
   
    image:
      repository: nginx
      pullPolicy: IfNotPresent
      tag: "latest"
   
    service: 
      enabled: true
      type: NodePort 
      port: 80   

5. You can test the helmchart with default OR override-values.yaml

    $ helm template release-name clouddrove/helmchart -f override-app1-values.yaml --debug

6. Deploy the clouddrove/helmchart on kubernetes cluster (eks, aks, gks, minikube). Here we are using clouddrove as releasename .

• Find the required CustomResourceDefinitions(crds) here.

   $ kubectl create namespace clouddrove
   $ helm install clouddrove clouddrove/helmchart -f override-app1-values.yaml --namespace=clouddrove --debug

• using --debug flag to get more information of helm installation.

• If chart with same releasename is already installed then you can upgrade it via helm upgrade clouddrove clouddrove/helmchart -f override-app1-values.yaml --namespace=clouddrove --debug

• To always be at safe side use upgrade and --install together, this option will Install the helmchart if not present.

   $ helm upgrade --install clouddrove clouddrove/helmchart -f override-app1-values.yaml --namespace=clouddrove --debug

• Check the STATUS of helmchart helm list it should be deployed

   $ helm list --namespace=clouddrove                
   NAME      	NAMESPACE	REVISION	UPDATED                                	STATUS  	CHART          	APP VERSION
   clouddrove	clouddrove  	1       	2023-05-23 20:28:39.571788019 +0530 IST	deployed	helmchart-0.0.6	0.0.6  

• Further verify by seeing all information of clouddrove helmchart deployment

   $ kubectl get all --namespace=clouddrove
   NAME                                        READY   STATUS    RESTARTS   AGE
   pod/clouddrove-helmchart-8445d9c6c6-6lrmn   1/1     Running   0          19s
   pod/clouddrove-helmchart-8445d9c6c6-ncw97   1/1     Running   0          19s
  
   NAME                           TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
   service/clouddrove-helmchart   NodePort   10.100.87.24   <none>        80:32245/TCP   19s
  
   NAME                                   READY   UP-TO-DATE   AVAILABLE   AGE
   deployment.apps/clouddrove-helmchart   2/2     2            2           19s
  
   NAME                                              DESIRED   CURRENT   READY   AGE
   replicaset.apps/clouddrove-helmchart-8445d9c6c6   2         2         2       19s
  
   NAME                                                       REFERENCE                         TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
   horizontalpodautoscaler.autoscaling/clouddrove-helmchart   Deployment/clouddrove-helmchart   <unknown>/80%   1         100       1          19s

• Access the sample application deployed using clouddrove/helmchart

• Run below command to get IP of your node. Change podname with the name of your pod. In above example podname is clouddrove-helmchart-8445d9c6c6-6lrmn

   $ kubectl describe pod podname -n clouddrove | grep Node: | awk -F / '{print $2}'

  192.172.100.10

• Get the port number from service by which your container is mapped with Node's Port. In above example port number is 32245

• Access your application running on pod by visiting on 192.172.100.10:32245 in your browser

7. Deploying another application using same clouddrove/helmchart with different overrides-values.yaml

• Change the attributes in override-app2-values.yaml as per your requirement. Some changes are given below

   replicaCount: 2
  
   image:
     repository: tutum/hello-world
     pullPolicy: IfNotPresent
     tag: "latest"
  
   service: 
     enabled: true
     type: NodePort 
     port: 80   
  

• Follow the same steps deploy this chart and get the IP & NodePort of second application to open webpage on your browser.

1. List the helm release in clouddrove namespace

    $ helm list --namespace=clouddrove                                                                                  
    NAME            NAMESPACE       REVISION        UPDATED                                 STATUS          CHART           APP VERSION
    clouddrove      clouddrove      1               2023-05-23 21:05:03.061111663 +0530 IST deployed        helmchart-0.0.6 0.0.6      

2. Uninstall this helm release using below command

    $ helm uninstall clouddrove --namespace=clouddrove

3. Make sure to delete Persistent Volume as default reclaimPolicy was set to Retain

   $ kubectl get persistentVolume            
   NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS     CLAIM                             STORAGECLASS           REASON   AGE
   clouddrove-helmchart                       512Mi      RWO            Retain           Bound      clouddrove/clouddrove-helmchart   clouddrove-helmchart            114s
   
   $ kubectl delete persistentVolume clouddrove-helmchart

If you come accross a bug or have any feedback, please log it in our issue tracker, or feel free to drop us an email at hello@clouddrove.com.

If you have found it worth your time, go ahead and give us a ★ on our GitHub!

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