You can add a cluster to Active IQ Unified Manager so that you can monitor the cluster. This includes the ability to obtain cluster information such as the health, capacity, performance, and configuration of the cluster so that you can find and resolve any issues that might occur.

What you’ll need

You must have the Application Administrator role or the Storage Administrator role.

You must have the following information:

Unified Manager supports on-premises ONTAP clusters, Cloud Volumes ONTAP.
You must have the host name or cluster management IP address (IPv4 or IPv6) for the cluster.

When using the host name, it must resolve to the cluster management IP address for the cluster management LIF. If you use a node management LIF, the operation fails.
You must have the user name and password to access the cluster.

This account must have the admin role with Application access set to ontapi, console, and http.
You must know the port number to connect to the cluster using the HTTPS protocol (typically port 443).
You must have adequate space on the Unified Manager server. You are prevented from adding a cluster to the server when greater than 90% of space is already consumed.

You have the required certificates:

SSL (HTTPS) certificate: This certificate is owned by Unified Manager. A default self-signed SSL (HTTPS) certificate is generated with a fresh installation of Unified Manager. Fujitsu recommends that you upgrade it to CA-signed certificate for better security. If the server certificate expires, you should regenerate it and restart Unified Manager for the services to incorporate the new certificate. For more information about regenerating SSL certificate, see Generating an HTTPS security certificate.

EMS certificate: This certificate is owned by Unified Manager. It is used during authentication for EMS notifications received from ONTAP.

Certificates for Mutual TLS communication: Used during Mutual TLS communication between Unified Manager and ONTAP. The certificate-based authentication is enabled for a cluster, based on the ONTAP version.

Certificate-based authentication is not enabled automatically for a cluster, if you are updating an older version of Unified Manager. However, you can enable it by modifying and saving the cluster details. If the certificate expires, you should regenerate it to incorporate the new certificate. For more information about viewing and regenerating the certificate, see Editing clusters.

You can add a cluster from the web UI, and certificate-based authentication is automatically enabled.
You can add a cluster through Unified Manager CLI, the certificate-based authentication is not enabled by default. If you add a cluster using Unified Manager CLI, it is required to edit the cluster using Unified Manager UI. You can see Supported Unified Manager CLI commands to add a cluster using Unified Manager CLI.
If certificate-based authentication is enabled for a cluster, and you take the backup of Unified Manager from a server and restore to another Unified Manager server where hostname or IP address is changed, then monitoring of the cluster can fail. To avoid the failure, edit and save the cluster details. For more information about editing cluster details, see Editing clusters.

Cluster certificates: This certificate is owned by ONTAP. You cannot add a cluster to Unified Manager with an expired certificate and if the certificate has already expired, you should regenerate it before adding the cluster.

A single instance of Unified Manager can support a specific number of nodes. If you need to monitor an environment that exceeds the supported node count, you must install an additional instance of Unified Manager to monitor some of the clusters.

Steps

In the left navigation pane, click Storage Management > Cluster Setup.
On the Cluster Setup page, click Add.
In the Add Cluster dialog box, specify the values as required, and then click Submit.
In the Authorize Host dialog box, click View Certificate to view the certificate information about the cluster.
Click Yes.

After saving the cluster details, you can see the certificate for Mutual TLS communication for a cluster.

If the certificate-based authentication is not enabled, Unified Manager checks the certificate only when the cluster is added initially. Unified Manager does not check the certificate for each API call to ONTAP.

After all the objects for a new cluster are discovered, Unified Manager starts to gather historical performance data for the previous 15 days. These statistics are collected using the data continuity collection functionality. This feature provides you with over two weeks of performance information for a cluster immediately after it is added. After the data continuity collection cycle is completed, real-time cluster performance data is collected, by default, every five minutes.

Because the collection of 15 days of performance data is CPU intensive, it is suggested that you stagger the addition of new clusters so that data continuity collection polls are not running on too many clusters at the same time. Additionally, if you restart Unified Manager during the data continuity collection period, the collection will be halted and you will see gaps in the performance charts for the missing timeframe.

If you receive an error message that you cannot add the cluster, check to see if the following issues exist:

If the clocks on the two systems are not synchronized and the Unified Manager HTTPS certificate start date is later than the date on the cluster. You must ensure that the clocks are synchronized using NTP or a similar service.
If the cluster has reached the maximum number of EMS notification destinations the Unified Manager address cannot be added. By default only 20 EMS notification destinations can be defined on the cluster.

Related information

Adding users

Viewing the cluster list and details

Installing a CA signed and returned HTTPS certificate