> For the complete documentation index, see [llms.txt](https://platform9.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://platform9.com/kb/smcp/solution/nodelet-cluster-creation-failed-with-unknown-flag-bootstrap-con.md).

# The Nodelet(KDU Hosting) Cluster Creation Failed With "unknown flag: --bootstrap-config" Error.

## Problem:

* Management Plane Hosting nodelet cluster creation is failing when `--bootstrap-config` flag is used.

{% tabs %}
{% tab title="Error" %}

```javascript
[root@anik8s-ddu-lts2-2 ~]# /opt/pf9/airctl/airctl advanced-ddu create-mgmt --bootstrap-config /root/clusterSpec.yaml
Error: unknown flag: --bootstrap-config
```

{% endtab %}
{% endtabs %}

## Environment:

* Platform9 Edge Cloud - LTS2
* Nodelet Cluster(DDU hosting Cluster)

## Cause

* The flag `--bootstrap-config` is now replaced with the flag `--config` hence use of `--bootstrap-config` flag will result in such a kind of installation failures.
* Also one more thing to notice here is, the flag `--config` expects the airctl configuration file as the input or value.
* The example airctl configuration file can be found at the path `/opt/pf9/airctl/conf/airctl-config-example.yaml`
* Since this file has the parameter `bootstrapCfgPath` already defined in it hence there is no need to provide the bootstrap configuration file separately during creation of management plane.

```javascript
[root@anik8s-ddu-lts2-2 ~]# cat /opt/pf9/airctl/conf/airctl-config-example.yaml | grep -i bootstrapCfgPath
bootstrapCfgPath: /etc/nodelet/airctl-mgmt/airctl-mgmt.yaml
```

## Solution:

* The correct command to be used for the the Management Plane creation is as mentioned below.

{% tabs %}
{% tab title="Correct Command to create DU" %}

```javascript
/opt/pf9/airctl/airctl advanced-ddu create-mgmt --config /opt/pf9/airctl/conf/airctl-config.yaml
```

{% endtab %}
{% endtabs %}


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