# Add Node Node (Existing Cloud Host) - AddUK8SExistingUHost

## Overview

Add the pre-created cloud host to the UK8S cluster. Please note that this cloud host will still perform the system reinstallation operation.






## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `AddUK8SExistingUHost`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.genesissai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](api/summary/regionlist) |**Yes**|
| **Zone** | string | Availability Zone. See [Availability Zone List](api/summary/regionlist) |No|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, and the sub-account must be filled in. Please refer to the [GetProjectList interface](api/summary/get_project_list). |No|
| **Password** | string | Node node password. Please set the password according to the [field specification](api/uhost-api/specification). The password needs to be encoded with base64, as follows: # echo -n Password1 \| base64 |**Yes**|
| **ClusterId** | string | UK8S Cluster ID. Can be obtained from the UK8S console.<br /> |**Yes**|
| **UHostId** | string | Cloud Host Id, to ensure the normal operation of the node, the configuration of this host should not be less than 2C4G. |**Yes**|
| **MaxPods** | int | Default is 110, it is recommended to be less than or equal to 110 in the production environment. |No|
| **Labels** | string | Node labels. In the form of key=value, multiple groups are separated by ",", up to 5 groups. For example, env=pro,type=game |No|
| **SubnetId** | string | The subnet Id to which this cloud host belongs. |No|
| **ImageId** | string | Image Id, if not filled, the backend program will automatically select an available Image Id. It supports user-defined images, and user-defined images must be based on basic images. |No|
| **DisableSchedule** | boolean | Indicates whether to temporarily disable the node after adding it. Enter "true" to disable, enter anything else or leave it blank to not disable. |No|
| **UserData** | string | User-defined data. This field can be filled when the image supports the Cloud-init Feature. Note: 1. The total data size does not exceed 16K; 2. Use base64 encoding. |No|
| **InitScript** | string | User-defined Shell script. The difference from UserData is that InitScript is executed after the node initialization is completed, while UserData is executed during the initialization of the cloud host. |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|




## Example

### Request Example
    
```
https://api.genesissai.com/?Action=AddUK8SExistingUHost
&Region=cn-zj
&Zone=cn-zj-01
&ProjectId=dVbiuuWn
&NodeId=UMOVYunk
&Password=yFgKqXEO
&MaxPods=1
&Labels=Zejwkpch
&ClusterId=KOyqQlVA
&ClusterId=JrBEhuxq
&SubnetId=DCsCsHkw
&ImageId=elKgKSHF
&DisableSchedule=dAOelOGX
&UserData=eqDmkTAX
&InitScript=PhwUTXgX
```

### Response Example
    
```json
{
  "Action": "AddUK8SExistingUHostResponse",
  "Message": "kCwOaEDG",
  "RetCode": 0
}
```