helmchart

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

☸️ HELM installation

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.

CloudDrove helmchart structure

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.

Installing CloudDrove helmchart in your Kubernetes Cluster

Add clouddrove helm repository in your local.

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

Update the clouddrove helm repo.
```
 $ helm repo update clouddrove
```
Get the overrides-values.yaml from HERE.

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   

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

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

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 ```yaml $ 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 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 /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

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 ```yaml 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.

Uninstalling CloudDrove/helmchart

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      

Uninstall this helm release using below command

 $ helm uninstall clouddrove --namespace=clouddrove

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

Feedback

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!

About us

At CloudDrove, we offer expert guidance, implementation support and services to help organisations accelerate their journey to the cloud. Our services include docker and container orchestration, cloud migration and adoption, infrastructure automation, application modernisation and remediation, and performance engineering.

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