NetApp HCI Manual page 234

Use API to run compute node health checks prior to upgrading firmware
You can use REST API to verify that compute nodes in a cluster are ready to be upgraded. The health check
verifies that there are no obstacles to upgrading, such as ESXi host issues or other vSphere issues. You will
need to run compute node health checks for each compute cluster in your environment.
Steps
1. Locate the controller ID and cluster ID:
a. Open the inventory service REST API UI on the management node:
https://[management node IP]/inventory/1/
b. Click Authorize and complete the following:
i. Enter the cluster user name and password.
ii. Enter the client ID as
iii. Click Authorize to begin a session.
c. From the REST API UI, click GET /installations.
d. Click Try it out.
e. Click Execute.
f. From the code 200 response body, copy the
g. From the REST API UI, click GET /installations/{id}.
h. Click Try it out.
i. Enter the installation ID.
j. Click Execute.
k. From the code 200 response body, copy the IDs for each of the following:
i. The cluster ID ("clusterID")
ii. A controller ID ("controllerId")
mnode-client
if the value is not already populated.
"id"
for the installation you plan to use for health checks.