Install and basic configuration of helm

– install helm:
curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash

– install chartmuseum:
curl https://raw.githubusercontent.com/helm/chartmuseum/main/scripts/get-chartmuseum | bash

– run chartmuseum:

chartmuseum --debug --port=8081 \
--storage="local" \
--storage-local-rootdir="./chartstorage" &

– installing charts into kubernetes:
Add the URL to your ChartMuseum installation to the local repository list:
helm repo add chartmuseum http://localhost:8081

Basic commands

– List the repositories:
helm repo list

– Initialize a Helm Chart Repository:
helm repo add bitnami https://charts.bitnami.com/bitnami

– install a chart:
helm install chartmuseum/mychart --generate-name

– Search charts in repositories::
helm search repo

– Show description of a chart::
helm show chart bitnami/postgresql

– List releases performed in helm::
helm list

Install a chart from a local directory

The first time we can specify :
helm install modeler-airflow ./modeler-airflow-chart --namespace airflow --create-namespace --debug

Alternatively, we can use this command to install or upgrade a chart:
helm upgrade -i --force modeler-airflow ./modeler-airflow-chart --debug

If we encounter this error :
Error: UPGRADE FAILED: "modeler-airflow-chart" has no deployed releases

We need to delete the secrets first:
kubectl delete secrets sh.helm.release.v1.modeler-airflow.v1

debugging commands

helm lint is your go-to tool for verifying that your chart follows best practices.

helm template --debug will test rendering chart templates locally.

helm install --dry-run --debug will also render your chart locally without installing it, but will also check if conflicting resources are already running on the cluster. Setting –dry-run=server will additionally execute any lookup in your chart towards the server.

helm get manifest: This is a good way to see what templates are installed on the server.