Discovery problem - fping error (execution time limit)

[cezchitos]

Hi,

I have a Zabbix setup using Docker and the 'zabbix-server-mysql:alpine-7.4-latest' image.

I then have a few discovery rules that do simple 'ICMP ping' checks so I can see the availability of various devices on the network, regardless if they have an agent installed or not.

The problem is that not all devices are found, and in the logs I can see the following error:

fping execution time limit (600s) exceeded, stopping output processing
some_host.my_domain (192.168.0.240)   : [0], 64 bytes, 7.07 ms (7.07 avg, 0% loss)

Some of the things I have tried:

• Increasing the ZBX_STARTPINGERS and ZBX_STARTDISCOVERERS to 10
• Increasing file descriptor limits from 1024 to 65535 to get rid of an error
• Adding the following line in the docker compose file:

    cap_add:
      - NET_RAW
    sysctls:
      - net.ipv4.ping_group_range=0 1995

Additionally, if I open a prompt to the zabbix server docker instance and simply call

/usr/sbin/fping -a -g 192.168.0.0/24

I can then see all the network devices I expected, including the ones that Zabbix hangs on, with the results showing up in just a few seconds.

Just to make it clear, I am expecting the discovery rule to find 5 devices, but it only finds 3. So it partially works.

Any idea what else to try? Thanks!