helmlab.txt

helm installation

wget https://get.helm.sh/helm-v3.10.2-linux-amd64.tar.gz
tar -zxvf helm-v3.10.2-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm

helm version
helm env

#To list repo

helm repo list

#To add a repo
#helm repo add <repo> url
helm repo add stable https://charts.helm.sh/stable

#Search a repo
helm search repo mysql


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#create helm chart

1) helm create testchart

2) cd testchart

3) ls 

4) #Cleanup all the files inside templates directory so that we will start from scratch

rm -rf templates/*

5)# Create deployment file

kubectl create deployment nginx --image=nginx --dry-run=client -o yaml >> templates/deployment.yaml

6) #create a deployment to expose service
kubectl create deployment nginx --image=nginx                                                      

kubectl expose deploy nginx --port 80 --type NodePort --dry-run=client -o yaml > templates/service.yaml

7) #define only the required values inside Chart.yaml
cat Chart.yaml    

8)#One more additional file, need to create is NOTES.txt inside templates directory

echo "This is first helm chart and it will deploy nginx application" >>templates/NOTES.txt

9)#cleanup rest of the files and directory to draw the clean slate
cd ..

10)#It always a good idea to run linter before deploying your chart to make sure there is no syntax error or your are following all the best practices

 helm lint ./testchart

11) #delete the deployment

kubectl delete deployment nginx
kubectl delete svc nginx
12)#Do the dry run
 helm install testchart ./testchart --dry-run

13) #install

helm install testchart ./testchart
#Check service and deployment
kubectl get deployment
kubectl get svc

14) #check
helm list

15) #package
helm package testchart/
#Successfully packaged chart and saved it to: /root/testchart-0.1.0.tgz
16) #Uninstall
helm uninstall testchart
#Check service and deployment
kubectl get svc
kubectl get deployment