An image contains the code used to create a deployment. Then, a deployment can be created from an image, which should then create a replica set (which is the number of pods that should be created), and then the pods should be created.

This assumes you have used the curl REST API to obtain an OAuth bearer token. Let's say the bearer token is sha256~0Rs__hPuXmBD3TJTXNDisC7wRBN-nrFnYTxgdBrFT-U.

Here is how you would list the deployments in my-project using curl.

curl
--insecure
--request GET
--header "Accept: application/json"
--header "Authorization: Bearer sha256~0Rs__hPuXmBD3TJTXNDisC7wRBN-nrFnYTxgdBrFT-U"
--url "https://api.openshift.example.com:6443/apis/apps/v1/namespaces/my-project/deployments"

If the items array contains key value pairs, this means the namespace contains one or more deployments.

{
  "kind": "DeploymentList",
  "apiVersion": "apps/v1",
  "metadata": {
    "selfLink": "/apis/apps/v1/namespaces/my-project/deployments",
    "resourceVersion": "708878925"
  },
  "items": [
    {
      "metadata": {
        "name": "my-deployment",
        "namespace": "my-project",
        "selfLink": "/apis/apps/v1/namespaces/my-project/deployments/my-deployment",
        "uid": "7709e73e-3936-467c-86d6-5af3b01ca106",
        "resourceVersion": "696422824",
        "generation": 1,
        "creationTimestamp": "2021-12-17T18:55:58Z"
      }
    }
   ]
  }
}

You can list a single deployment by including the name of the deployment.

curl
--insecure
--request GET
--header "Accept: application/json"
--header "Authorization: Bearer sha256~0Rs__hPuXmBD3TJTXNDisC7wRBN-nrFnYTxgdBrFT-U"
--url "https://api.openshift.example.com:6443/apis/apps/v1/namespaces/my-project/deployments/my-deployment"