Kubernetes-Helm Charts

 HELM (The package manager for Kubernetes)

Helm is the best way to find, share and use software built for kubernetes

Installation Steps On Ubuntu

•  curl https://baltocdn.com/helm/signing.asc | sudo apt-key add -
•  sudo apt-get install apt-transport-https --yes
•  echo "deb https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
•  sudo apt-get update
•  sudo apt-get install helm

Verification

 helm version

 helm --help

Add Stable Repository

1.  helm repo add stable https://charts.helm.sh/stable
2.  helm search repo stable
3.  helm repo update
4.  helm install prometheus stable/prometheus-operator
5.  kubectl --namespace default get pods -l "release=prometheus"
6. 
   

Create a chart with default template

• helm create helloworld
• helm install helloworld-1 helloworld
•  kubectl get deploy
• helm install --set replicaCount=2 helloworld-2 helloworld
• kubectl get deploy
• helm upgrade --set replicaCount=4 helloworld-2 helloworld
• Overwride values.yaml. create a file called myvalues.yaml
•   replicaCount: 5
•  helm upgrade -f myvalues.yaml helloworld-2 helloworld

Create Charts

1. Create a chart name it mychart 

         helm create mychart

2. helm template mychart

3. helm lint mychart

2. Remove all the files under the template folder

         rm -ifr *

3. Create a Yaml file under template folder

apiVersion: v1

kind: Pod

metadata:

    name: pod20

spec:

   containers:

   - name: c1

     image: nginx

4. Change to home directory

cd /home/ubuntu

5. Install mychart 

    helm install mychart ./mychart

6. list the charts

   helm list

7. List the pods

  pod20 should be created.

8. helm uninstall mychart