---
title: "Helm installation reference"
description: "Helm chart values reference for installing Calico Open Source covering supported overrides and operator configuration knobs."
product: "Calico Open Source"
version: "3.32 (latest)"
section: "Reference"
canonical_url: "https://docs.tigera.io/calico/latest/reference/installation/helm_customization"
---

# Helm installation reference

You can customize the following resources and settings during Calico Helm-based installation using the file, `values.yaml`.

- [Installation](https://docs.tigera.io/calico/latest/reference/installation/api.md#installationspec)
- [Default felix configuration](https://docs.tigera.io/calico/latest/reference/resources/felixconfig.md#spec)

> **SECONDARY:** If you customize Felix configuration when you install Calico, the `crd.projectcalico.org/v1` API group is used. However, when you apply Felix configuration customization after installation (when the tigera-apiserver is running), use the `projectcalico.org/v3` API group. When using [native v3 CRDs](https://docs.tigera.io/calico/latest/operations/native-v3-crds.md), only the `projectcalico.org/v3` API group is installed and should always be used.

### Sample values.yaml

Here is a sample `values.yaml` file with settings for custom resources. You must enable the custom resource using `enabled: true` to provide custom configurations; custom resources set to false are ignored.

```yaml
installation:
  enabled: true
  <installation resource spec fields to configure>

defaultFelixConfiguration:
  enabled: false
  <if enabled is true: felixConfiguration resource spec fields to configure>
```

## Common customizations

Example of common customizations that you might want to configure in you values.yaml for your Helm-based installation:

### Encryption using WireGuard

WireGuard encryption is configured in the FelixConfiguration. To set encryption for your cluster, update the `values.yaml` file.

```yaml
defaultFelixConfiguration:
  enabled: true
  wireguardEnabled: true
  wireguardEnabledV6: true
```