Weird Issues with Nagios

[soamz]

I have a server, which has 2 ports only.
1 port is connected directly to the router to give it the public IP access.
2nd port is connected to my access network switch, which has more than 100+ devices, which are on private IP, 10.10.10.xxx , 10.10.11.xxx


Now in the server, all the devices show up perfectly fine, if I do arp -a command.

But if I try to ping any random devices, it doesnt ping. Then again it starts pinging after 5 mins, again stops, again pings in 1 day. Its all random ghost!

What could be the issue.

For example, im able to ping 10.10.10.23 device from the command line.
But Nagios tells it as offline.

Im on 4.1.1 nagios installed on ubuntu server latest.

[Box293]

Is your server low on memory or disk space?

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free -m
df -h
df -i

What is the output of:

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ps -ef | grep nagios.cfg | grep -v grep

Can you please post your nagios.cfg file.

On your Nagios host, in multiple SSH sessions, have you kept a ping running continually on a bunch of devices to see if there is actually a problem occurring on your network?

[soamz]

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root@jetnms:~# free -m
             total       used       free     shared    buffers     cached
Mem:         16043       6070       9972        120        204       4765
-/+ buffers/cache:       1101      14941
Swap:        16376          0      16376
root@jetnms:~# 

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root@jetnms:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            7.9G  4.0K  7.9G   1% /dev
tmpfs           1.6G  584K  1.6G   1% /run
/dev/sda1       443G   10G  410G   3% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
none            5.0M     0  5.0M   0% /run/lock
none            7.9G  4.0K  7.9G   1% /run/shm
none            100M     0  100M   0% /run/user
root@jetnms:~# 

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root@jetnms:~# df -i
Filesystem       Inodes  IUsed    IFree IUse% Mounted on
udev            2050846    445  2050401    1% /dev
tmpfs           2053530    438  2053092    1% /run
/dev/sda1      29450240 163245 29286995    1% /
none            2053530      2  2053528    1% /sys/fs/cgroup
none            2053530      6  2053524    1% /run/lock
none            2053530      2  2053528    1% /run/shm
none            2053530      2  2053528    1% /run/user
root@jetnms:~# 

[soamz]

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root@jetnms:~# ps -ef | grep nagios.cfg | grep -v grep
nagios   19590     1  0 May08 ?        00:00:39 bin/nagios etc/nagios.cfg
nagios   19604 19590  0 May08 ?        00:00:03 bin/nagios etc/nagios.cfg
root@jetnms:~# 

And attached my /etc/nagios4/conf.d/jetnms.cfg

[rkennedy]

What is the output of route -n? It sounds like a routing issue more than a Nagios problem at this point.

[soamz]

What is the output of route -n? It sounds like a routing issue more than a Nagios problem at this point.

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root@jetnms:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         103.194.232.1   0.0.0.0         UG    0      0        0 eth0
7.7.7.0         0.0.0.0         255.255.255.0   U     0      0        0 eth1
10.10.10.0      0.0.0.0         255.255.255.0   U     0      0        0 eth1
10.10.11.0      0.0.0.0         255.255.255.0   U     0      0        0 eth1
103.194.232.0   0.0.0.0         255.255.255.240 U     0      0        0 eth0

[rkennedy]

Going to close this one up so we aren't working on the same issue at play as here -
https://support.nagios.com/forum/viewto ... 999#bottom

We will continue in that thread since these are related.