This API is used to add an ECS to a security group.

You are suggested to add an ECS to a maximum of five security groups.

POST /v2.1/{project_id}/servers/{server_id}/action

POST /v2/{project_id}/servers/{server_id}/action

Table 1 describes the parameters in the URI.

**Table 1** Parameter description
Parameter	Mandatory	Description
project_id	Yes	Specifies the project ID.
server_id	Yes	Specifies the ECS ID.

Table 2 describes the request parameters.

**Table 2** Request parameter
Parameter	Mandatory	Type	Description
addSecurityGroup	Yes	Object	Specifies the security group where the ECS is added. For details, see Table 3.

**Table 3** **addSecurityGroup** parameter description
Parameter	Mandatory	Type	Description
name	Yes	String	Specifies the UUID or name of the security group to which the ECS is added. The configuration takes effect for the NICs on the ECS.

None

POST https://{endpoint}/v2.1/{project_id}/servers/{server_id}/action

{ 
    "addSecurityGroup": { 
        "name": "sg-test"
    }
}

None

Adding a Security Group