Helm

Helm is the package manager for Kubernetes. It lets you define, install, and upgrade Kubernetes base applications. For more information about Helm, please the visit official website: https://helm.sh.

The following assumes that Kubernetes has already been installed and kubectl can access the POD. CORD uses helm to deploy containers on Kubernetes, and as such, it should be installed before trying to deploy any CORD container.

Helm documentation can be found at https://docs.helm.sh/. It consists of two components:

• helm: The helm client is basically a CLI utility.
• tiller: The server side component, which executes client commands on the Kubernetes cluster.

Helm can be installed on any device that is able to reach the Kubernetes POD (i.e. the developer laptop, another server in the network). Tiller should be installed on the Kubernetes cluster itself.

Note: if you've installed Minikube you'll likely need to install socat as well before proceeding, otherwise errors will be thrown. For example, on Ubuntu do sudo apt-get install socat.

Install Helm Client

Follow the instructions at https://github.com/kubernetes/helm/blob/master/docs/install.md#installing-the-helm-client

Install Tiller

Enter the following commands from any device thsat is already able to access the Kubernetes cluster.

helm init
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'
helm init --service-account tiller --upgrade

Once helm and tiller are installed you should be able to run the command helm ls without errors.

Next Step

Once you are done, you are ready to deploy CORD components using their helm charts! See Bringing Up CORD. For more detailed information, see the helm chart reference guide.