Nagios Support Forum

The funny thing is that i can monitor the virtual machines on the host but not the host itself...

Has the host ever been able to be monitored and this problem just started, or has it never been able to be monitored?

It worked for some days and suddenly during the day (without any restart or config-change) the host has gone "offline" and never came back up.

You've stumped me. I got nothing. I'm going to think about this as I burn some hamburgers and drink some micro brews.

Have you tried rebooting the Nagios server? I always like a fresh boot when troubleshooting odd problems.

Hi,

I got your difference between the nagios check and your manual check.

# 'check-host-alive' command definition
define command{
command_name check-host-alive
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 5
}

--> you use the IP-Address here

[nagios@kwapp001 ~]$ /usr/lib64/nagios/plugins/check_ping -H vmware001 -w 3000.0,80% -c 5000.0,100% -p 5 -4
PING OK - Packet loss = 0%, RTA = 0.40 ms|rta=0.400000ms;3000.000000;5000.000000;0.000000 pl=0%;80;100;0

--> you use the hostname here

[nagios@kwapp001 ~]$ ping vmware001
PING vmware001 (192.168.34.176) 56(84) bytes of data.
64 bytes from vmware001 (192.168.34.176): icmp_seq=1 ttl=64 time=0.201 ms
64 bytes from vmware001 (192.168.34.176): icmp_seq=2 ttl=64 time=0.369 ms
64 bytes from vmware001 (192.168.34.176): icmp_seq=3 ttl=64 time=0.372 ms

--> hostname too

maybe there is an error in your host-config file?

@Box293
Do you mean restarting the nagios deamon or the complete server? I did a restart on the nagios deamon which didn't work. Unfortunately I can't restart the machine because it hosts a lot more services than the nagios so I have to try this sometime


@V3xX

Manual test works fine with Hostname and IP

[nagios@kwapp001 ~]$ /usr/lib64/nagios/plugins/check_ping -H 192.168.34.176 -w 3000.0,80% -c 5000.0,100% -p 5
PING OK - Packet loss = 0%, RTA = 0.41 ms|rta=0.415000ms;3000.000000;5000.000000;0.000000 pl=0%;80;100;0

[nagios@kwapp001 ~]$ /usr/lib64/nagios/plugins/check_ping -H vmware001 -w 3000.0,80% -c 5000.0,100% -p 5
PING OK - Packet loss = 0%, RTA = 0.36 ms|rta=0.357000ms;3000.000000;5000.000000;0.000000 pl=0%;80;100;0

the config also contains the IP

define host{
use generic-hosts
host_name vmware001
alias VMWARE001
address 192.198.34.176
}

hi,

if this was copy and paste from host config, i found your error:

define host{
use generic-hosts
host_name vmware001
alias VMWARE001
address 192.198.34.176
}

if this was copy and paste from host config, i found your error:

Nice job. Funny how you miss the simple stuff.

Realy!?! Just a typo?!?!?

Thank you all for your help.