Server not contacting hosts with zabbix agent2

[coda_matt]

I've added a three hosts to a new Zabbix 6.2.2 installation, each with zabbix-agent2 installed and running, but the Zabbix server isn't contacting them. There's no firewall in the way - I can connect to port 10050 from the zabbix server using netcat.

The only entries in /var/log/zabbix/zabbix_server.log are:

636714:20221102:130116.881 cannot send list of active checks to "::1": host [ <fqdn of server> ] not found

[coda_matt]

I fixed this in the end. I hadn't added a template to the host: soon as I did that everything worked.

Posting here in case someone else makes the same mistake.