Zabbix 3.4.9 item net.tcp.service not working

[djhash]

Hi all.

I am attempting to configure an agentless host on a new Zabbix install. On a CentOS 7

cat /etc/*elease*
CentOS Linux release 7.4.1708 (Core)
Derived from Red Hat Enterprise Linux 7.4 (Source)
cat: /etc/lsb-release.d: Is a directory
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.4.1708 (Core)
CentOS Linux release 7.4.1708 (Core)
cpe:/o:centos:centos:7

zabbix_server -V
zabbix_server (Zabbix) 3.4.9
Revision 80550 9 May 2018, compilation time: May 9 2018 10:02:30

zabbix_agentd -V
zabbix_agentd (daemon) (Zabbix) 3.4.9
Revision 80550 9 May 2018, compilation time: May 9 2018 10:02:50


So far everything looks fine after initial setup. I ran into some minor issues but got easily resolved (selinux).

To first test, I decided to add a webserver as a host and simply do a HTTPS tcp check.

I created a new host, added Agent Interface at 127.0.0.1 with default port 10050, and enabled it.

Went to Items and created a new item;

Name: TCP-443
Type: Simple check
Key net.tcp.service[httpd,xx.xxx.x.xxx,443]
Host interface: Agent 127.0.0.1 : 10050
Update Interval: 10s
Show value: As is
Enabled: yes

The item page shows green Enabled as the status.

However when I go to the Hosts page under Configuration none of the Availability boxes are green (all grey) on that host.

When I go and stop the httpd service on the webserver, I don't see it update in zabbix.

But when I run the following command on the zabbix server:

zabbix_get -s 127.0.0.1 -k net.tcp.service[https,16.255.3.252,443]

I get a 0 when the webserver is stopped, and a 1 when it is running.

Am I missing a step in there to get the item and host properly configured for monitoring?

[djhash]

I knew I'd figure out a problem as soon as I posted this.. apparently a trigger needs to be configured. A couple of things in the quick start guide would need to be edited to be correct. First, let this line from triggers be in the items section.

"Items only collect data. To automatically evaluate incoming data we need to define triggers."

Also the part in items section where it tells you to see "Latest Data". It should specify that I need to click on "select" next to host or host groups to select the host I want to see the latest data from.

When I saw that it was empty i was mistaken into thinking that I did something wrong.