If this can help / solved problems with curl, time, queue

[toobtoob]

Hi all!

Let's share my today's experience. It may help someone.

I'm running Zabbix 2.0.4 on debian 6.0.6.
Under used server.
Nearly everything from stock.

Zabbix worked well but I encountered a lot of strange problem after reboot:
- web application failed to work with "curl_easy_perform: Couldn't resolve host name"
- a lot of item queued "More than 10 minutes" -> empty charts
- wrong time in logs and Monitoring web "Last check"

After a lot of test (tuning pollers, cache, dns resolv, ...) I found that time was the real problem (if I waited 2 hours everything resolved alone).

1 - hwclock
Found at https://www.zabbix.com/forum/archive/index.php/t-20664.html

hwclock --show

was 2 hours in the futur
fixed with

hwclock --systohc

2 - init.d scripts order
https://support.zabbix.com/browse/ZBXNEXT-1232
https://support.zabbix.com/browse/ZBXNEXT-890
At install time, I copied misc/debian scripts and didn't pay attention to update-rc.d warning message "missing LSB information"
(I think that zabbix started before ntp)

To fix it I edited /etc/init.d/zabbix-server and /etc/init.d/zabbix-agent :
(For server)

#! /bin/sh
### BEGIN INIT INFO
# Provides:          zabbix-server
# Required-Start:    $all
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: zabbix-server
# Description:       zabbix-server
### END INIT INFO

"Required-Start: $all" is probably not optimal but worked for me.

After next reboot everything is ok.

Have fun and long life to zabbix

/toobtoob (waiting or https://support.zabbix.com/browse/ZBXNEXT-98)