Helm - Add NodePool and EC2NodeClass

[mtavaresmedeiros]

Description

What problem are you trying to solve?
Allow specifying NodePool and Ec2NodeClass
How important is this feature to you?
It will simplify the installation of the karpenter with helm, allowing specifying a node pool and ec2nodeclass in the initial installation.

Ex: Install the karpenter with the terraform in a Kubernetes cluster with fargate(serverless) or another option with 0 nodes, and install the GitOps tools after it, without the need to create another resource (NodePool and Ec2NodeClass), and has all things work out-of-the-box.

If it is fine, I can do the PR.

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[jonathan-innis]

We had a similar request here: #1956. We are generally recommending that users build a "top-level chart" that take this chart as a dependency elsewhere since we are generally trying to avoid the burden of having to maintain the chart ourselves. given the number of options that we would have to support.

[mtavaresmedeiros]

hum... #1956 (comment), this commentary really makes sense. closing.

[younsl]

@mtavaresmedeiros In my production cluster, I am using my own karpenter-nodepool chart, integrated into the karpenter chart as a child chart.

Subchart dependencies declared in the Chart.yaml of the karpenter chart:

# charts/karpenter/Chart.yaml
dependencies:
  - name: karpenter-nodepool
    version: 0.0.7
    repository: "file://./charts/karpenter-nodepool"
    condition: karpenter-nodepool.enabled

Directory structure for karpenter chart, including karpenter-nodepool chart as subchart:

karpenter  # parent chart
├── Chart.lock
├── Chart.yaml
├── README.md
├── charts
│   └── karpenter-nodepool  # subchart
├── crds
├── templates
└── values.yaml