demo-helm/README.md

# demo-helm

A demo helm chart to deploy a simple web app written in Python.

## Build and push the sample app image

Use the `Makefile` to build and push the image.

```
make push-app-image
```

## Helm install/upgrade

### New Deployments

```
helm install <NAME> charts/demo-helm 
OR
helm install charts/demo-helm --generate-name
```

### Upgrading Deployments

Get your deployment ID
```
helm list 
```

```
helm upgrade demo-helm-1633825301 charts/demo-helm
```

You can wait for successful deployment too.

```
helm upgrade demo-helm-1633825301 charts/demo-helm --wait
```

## Setting registry pull secrets

You have to have an image pull secret. So first you need the secrets:

From: [The k8s docs]

```
kubectl create secret docker-registry regcred \
 --docker-server=https://registry.runcible.io \ 
 --docker-username=<your-name> \
 --docker-password=<your-pword> \
 --docker-email=<your-email>
```

Then you need to specify the secret in your deployment spec like so:

```
    spec:
      containers:
        - image: registry.runcible.io/demo-helm:1.0.1
          imagePullPolicy: Always
          name: backend
          ports:
            - name: backend
              containerPort: 5000
      imagePullSecrets:
        - name: regcred
```

[The k8s docs](https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/#create-a-secret-by-providing-credentials-on-the-command-line)