# HA Control Plan ip/fqdn

**URL:** https://forums.k8slens.dev/t/ha-control-plan-ip-fqdn/5280
**Category:** All about k0s
**Created:** [December 18, 2024, 7:35am UTC](https://forums.k8slens.dev/t/ha-control-plan-ip-fqdn/5280 "2024-12-18T07:35:29Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![bradley](https://forums.k8slens.dev/letter_avatar_proxy/v4/letter/b/c37758/32.png) [@bradley](https://forums.k8slens.dev/u/bradley)
#### Post date: [December 18, 2024, 7:35am UTC](https://forums.k8slens.dev/t/ha-control-plan-ip-fqdn/5280/1 "2024-12-18T07:35:29Z")

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I am using k0sctl to remotely setup the cluster. All is working well in my world. Just had a question about this part of the config.

k0s:  
config:  
spec:  
api:  
externalAddress: 10.10.20.198  
sans:  
- 10.10.20.198

Can the IP also be a fqdn. like [k8sapi.local.net](http://k8sapi.local.net)? Would I add that to the sans object as - [k8sapi.local.net](http://k8sapi.local.net)

Thanks  
Brad

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### Author: ![juanluisvaladas](https://forums.k8slens.dev/letter_avatar_proxy/v4/letter/j/e79b87/32.png) [@juanluisvaladas](https://forums.k8slens.dev/u/juanluisvaladas)
#### Post date: [December 19, 2024, 5:46pm UTC](https://forums.k8slens.dev/t/ha-control-plan-ip-fqdn/5280/2 "2024-12-19T17:46:45Z")

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Hi Brad,  
externalAddress must be an IP, sans should contain both the IP address and the name:

```auto
k0s:
  config:
    spec:
      api:
        externalAddress: 10.10.20.198
        sans:
        - 10.10.20.198
        - k8sapi.local.net

```

Best,  
Juan

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<div class="post-metadata">

### Author: ![bradley](https://forums.k8slens.dev/letter_avatar_proxy/v4/letter/b/c37758/32.png) [@bradley](https://forums.k8slens.dev/u/bradley)
#### Post date: [January 2, 2025, 7:53am UTC](https://forums.k8slens.dev/t/ha-control-plan-ip-fqdn/5280/3 "2025-01-02T07:53:57Z")

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Can the ip and/or fqdn be changed after the cluster has been deployed?