Helm resource watcher Quick start

This is a toy controller built by kubebuilder that watches a k8s resource managed by Helm. The controller will keep track of the helm application version after it locates the resource.

It only supports deployment type of resource for now.

Download the github repo

git clone git@github.com:ryanzhang-oss/deployment-watcher.git

Usage example

1. Install deployment based workloadDefinition

make install
make run

2. Create a Ryan object, here is an example

apiVersion: practice.shipa.io/v1alpha1
kind: Ryan
metadata:
  name: helm-watcher
spec:
  ResourceName: ryan-test

3. Install an application through helm

helm repo add podinfo https://stefanprodan.github.io/podinfo
helm repo update
helm upgrade --install helmapp podinfo/podinfo --version 5.0.0 --wait

4. Apply the watcher object

kubectl apply -f doc/examples/podinfo.yaml

5. Watch the watcher object

 kubectl get Ryan --watch
 
 NAME           APPVERSION
helm-watcher   5.0.0
helm-watcher   5.0.3
helm-watcher   5.1.1

6. Upgrade an application through helm

helm upgrade --install helmapp podinfo/podinfo --version 5.0.3 --wait
helm upgrade --install helmapp podinfo/podinfo --version 5.1.1 --wait