The ability to execute a vRO workflow or action via API is useful if you are using vRA or vRO as part of an overall CI/CD pipeline. If a vRA catalog item uses vRO actions to filter or set values on a custom form how can this be done if the vRA catalog item will be requested via REST.

In the example below I have a simple action that takes two inputs:

  • firstName – Type:String
  • secondName – Type:String

In order to be able to execute a vRO action you need to submit basic auth credentials. This will require the user account to be a member of the vco-admins group in vRO. This can either be a local user or an Active Directory user if vRA has been configured to integrate with Active Directory

The process for being able to execute the action via REST is a three part step. Part 1 is to determine the ID of the action that you wish to call. Execute the following operation:

GET - https://vro-fqdn/vco/api/actions

The result will be a large array of actions that looks something like this:

{
     "link": [
         {
             "attributes": [
                 {
                     "value": "d7e461f6-b88f-4f63-a2cc-7f3c76d1bd19",
                     "name": "id"
                 },
                 {
                     "value": "isBlocking",
                     "name": "name"
                 },
                 {
                     "name": "description"
                 },
                 {
                     "value": "com.vmware.library.vcaccafe.workflow.subscription/isBlocking",
                     "name": "fqn"
                 },
                 {
                     "value": "0.0.0",
                     "name": "version"
                 }
             ],
             .......

You’ll need to process this array to search for the name of the action that you wish to execute.

Part 2 is to retrieve the inputs for the action which is achieved via the following REST operation:

GET - https://vro-fqdn/vco/api/actions/{actionid}

The result will look something like this:

{

    "href": "https://192.168.1.26:443/vco/api/actions/278a1622-1924-4f37-bb24-0c5d36346ae9/",
    "relations": {
        "link": [
            {
                "href": "https://192.168.1.26:443/vco/api/actions/com.cloudkindergarten.examples/executedByApi/",
                "rel": "alternate"
            },
            {
                "href": "https://192.168.1.26:443/vco/api/actions/278a1622-1924-4f37-bb24-0c5d36346ae9/permissions/",
                "rel": "permissions"
            },
            {
                "href": "https://192.168.1.26:443/vco/api/actions/278a1622-1924-4f37-bb24-0c5d36346ae9/executions/",
                "rel": "executions"
            }
        ]
    },
    "id": "278a1622-1924-4f37-bb24-0c5d36346ae9",
    "output-type": "string",
    "name": "executedByApi",
    "description": "",
    "version": "0.0.0",
    "fqn": "com.cloudkindergarten.examples/executedByApi",
    "script": "var fullName = (firstName + \" \" + secondName);\nreturn fullName;",
    "input-parameters": [
        {
            "description": "",
            "type": "string",
            "name": "firstName"
        },
        {
            "description": "",
            "type": "string",
            "name": "secondName"
        }
    ]
}

From this we can see that action is expecting two input parameters; firstName and secondName both of type string.

Part 3 is to execute this action. We do this by using the following body content

{"parameters":
 [
  {
   "value": {"string":{ "value": "Andy"}},
   "type": "string",
   "name": "firstName",
   "scope": "local"
  },
  {
   "value":{"string":{"value": "Davies"}},
   "type": "string",
   "name": "secondName",
   "scope": "local"
  }
 ]
}

This is then executed with the REST Operation:

POST https://{vro-fqdn}/vco/api/actions/{actionid}/executions/

The response will hopefully be the returned value from the action. In this case the full name of the person:

{
    "value": {
        "string": {
            "value": "Andy Davies"
        }
    },
    "type": "string"
}

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