# Examples

---

## Merging multiple configuration objects

When using the IMDS configuration source (`--config-source=imds://user-data`),
`nodeadm` will merge any configuration objects it discovers before configuring your node.

With the following user data:
```
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY"

--BOUNDARY
Content-Type: application/node.eks.aws

---
apiVersion: node.eks.aws/v1alpha1
kind: NodeConfig
spec:
  cluster:
    name: my-cluster
    apiServerEndpoint: https://example.com
    certificateAuthority: Y2VydGlmaWNhdGVBdXRob3JpdHk=
    cidr: 10.100.0.0/16

--BOUNDARY--
Content-Type: application/node.eks.aws

---
apiVersion: node.eks.aws/v1alpha1
kind: NodeConfig
spec:
  kubelet:
    config:
      shutdownGracePeriod: 30s
      featureGates:
        DisableKubeletCloudCredentialProviders: true

--BOUNDARY--
```

The configuration `nodeadm` will use is:
```
---
apiVersion: node.eks.aws/v1alpha1
kind: NodeConfig
spec:
  cluster:
    name: my-cluster
    apiServerEndpoint: https://example.com
    certificateAuthority: Y2VydGlmaWNhdGVBdXRob3JpdHk=
    cidr: 10.100.0.0/16
  kubelet:
    config:
      shutdownGracePeriod: 30s
      featureGates:
        DisableKubeletCloudCredentialProviders: true
```

The configuration objects will be merged in the order they appear in the MIME multi-part document, meaning the value in the lattermost configuration object will take precedence.

---

## Configuring `containerd`

Additional `containerd` configuration can be supplied in your `NodeConfig`. The values in your inline TOML document will overwrite any default value set by `nodeadm`.

The following configuration object:
```
---
apiVersion: node.eks.aws/v1alpha1
kind: NodeConfig
spec:
  cluster: ...
  containerd:
    config: |
      [plugins."io.containerd.grpc.v1.cri".containerd]
      discard_unpacked_layers = false
```

Can be used to disable deletion of unpacked image layers in the `containerd` content store.