macOS Server 5.2, running on Sierra, comes with a few new alerting options previously unavailable in versions of OS X. The alerts are sent to administrators via servermgrd and configured in the 5th version of the Server app. To configure alerts on the server, open the Server app and then click on Alerts in the Server app sidebar. Next, click on the Delivery tab.
At the Delivery screen, click on the Edit button for Email Addresses and enter every email address that should receive alerts sent from the server. Then click on the Edit button for Push Notifications. Here, check the box for each administrator of the server. The email address on file for the user then receives push notifications of events from the server.
Click on OK when you’ve configured all of the appropriate administrators for alerting. Click on the Edit… button for Push and if Push notifications are not already enabled you will run through the Push Notification configuration wizard.
Then, check the boxes for Email and Push for each of the alerts you want to receive (you don’t have to check both for each entry). Alerts have changed in macOS Server, they are no longer based on the SMART status of drives or capacity; instead Delivery is now based on service settings.
Finally, as with previous versions of macOS Server, snmp is built in. The configuration file for which is located in the /private/etc/snmp/snmpd.conf and the built-in LaunchDaemon is org.net-snmp.snmpd, where the actual binary being called is /usr/sbin/snmpd (and by default it’s called with a -f option). Once started, the default community name should be COMMUNITY (easily changed in the conf file) and to test, use the following command from a client (the client is 192.168.210.99 in the following example):
snmpwalk -On -v 1 -c COMMUNITY 192.168.210.99
