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NagiosXI New Install
Posted: Mon May 21, 2012 9:24 pm
by scrantic
Hi All, I've been a long term user of Nagios Core (but no expert) and just made the jump to NagiosXI.
I've set-up the configuration from scratch in order to review what we're monitoring. The only hiccup I've encountered is issues with time-outs on various service/host checks. The best way to explain this is lots of false alerts and notifications.
I never encountered this issue with our previous Nagios Core installation but not sure where to start looking to fix the problem. Most of our hosts are windows based servers so we're using NSClient++ along with generic host/server checks for other equipment. Some help to identify these issues would be great.
Platform is a Clean CentOS 6.2 install on a XenServer host with the latest version of NagiosXI installed via the installation script.
Re: NagiosXI New Install
Posted: Tue May 22, 2012 8:51 am
by scottwilkerson
Are you seeing a lot of latency between the Nagios XI machine and the clients? Also what kind of load is your XI server running at?
Re: NagiosXI New Install
Posted: Tue May 22, 2012 8:55 am
by lmiltchev
Are you having issues only with windows hosts, monitored via NSClient++? Can you run a check command from a command line and show us the output?
If you need more info on how to do this, please, review our wiki page:
http://support.nagios.com/wiki/index.ph ... mmand-line
Re: NagiosXI New Install
Posted: Tue May 22, 2012 6:59 pm
by scrantic
scottwilkerson wrote:Are you seeing a lot of latency between the Nagios XI machine and the clients? Also what kind of load is your XI server running at?
Hi Scott, top - 09:54:24 up 5 days, 20:55, 1 user, load average: 0.87, 0.93, 1.28, There doesn't seem to be any latency issues it can happen with local or remote clients.
We're having issues monitoring generic hosts as well as nsclient hosts.
Output from a command line check.
Code: Select all
su -c '/usr/local/nagios/libexec/check_icmp -H 192.168.8.254 -w 3000.0,80% -c 5000.0,100% -p 5' nagios
OK - 192.168.8.254: rta 6.441ms, lost 0%|rta=6.441ms;3000.000;5000.000;0; pl=0%;80;100;;
su -c '/usr/local/nagios/libexec/check_icmp -H 192.168.100.254 -w 3000.0,80% -c 5000.0,100% -p 5' nagios
OK - 192.168.100.254: rta 0.921ms, lost 0%|rta=0.921ms;3000.000;5000.000;0; pl=0%;80;100;;
Re: NagiosXI New Install
Posted: Wed May 23, 2012 9:32 am
by scottwilkerson
Can you run the following and return the output
Re: NagiosXI New Install
Posted: Wed May 23, 2012 9:41 pm
by scrantic
Hi Scott, As requested.
Code: Select all
# netstat -s
Ip:
1059827 total packets received
87 with invalid addresses
0 forwarded
0 incoming packets discarded
983205 incoming packets delivered
1001481 requests sent out
Icmp:
204393 ICMP messages received
0 input ICMP message failed.
ICMP input histogram:
destination unreachable: 56
redirects: 1168
echo requests: 3276
echo replies: 199893
206326 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 2005
echo request: 201045
echo replies: 3276
IcmpMsg:
InType0: 199893
InType3: 56
InType5: 1168
InType8: 3276
OutType0: 3276
OutType3: 2005
OutType8: 201045
Tcp:
119323 active connections openings
66567 passive connection openings
0 failed connection attempts
547 connection resets received
47 connections established
3865345 segments received
3873910 segments send out
7708 segments retransmited
0 bad segments received.
1570 resets sent
Udp:
25130 packets received
99 packets to unknown port received.
0 packet receive errors
25321 packets sent
UdpLite:
TcpExt:
108091 TCP sockets finished time wait in fast timer
255 time wait sockets recycled by time stamp
213725 delayed acks sent
29 delayed acks further delayed because of locked socket
Quick ack mode was activated 156 times
1330221 packets directly queued to recvmsg prequeue.
50101 packets directly received from backlog
135948213 packets directly received from prequeue
1252499 packets header predicted
1091546 packets header predicted and directly queued to user
275849 acknowledgments not containing data received
2172676 predicted acknowledgments
6 times recovered from packet loss due to SACK data
3 congestion windows fully recovered
3 congestion windows partially recovered using Hoe heuristic
TCPDSACKUndo: 2
884 congestion windows recovered after partial ack
0 TCP data loss events
1 timeouts after reno fast retransmit
1 timeouts after SACK recovery
6 fast retransmits
3 retransmits in slow start
7396 other TCP timeouts
155 DSACKs sent for old packets
325 DSACKs received
337 connections reset due to unexpected data
8 connections reset due to early user close
27 connections aborted due to timeout
TCPDSACKIgnoredOld: 291
TCPDSACKIgnoredNoUndo: 10
TCPSackShifted: 17
TCPSackMerged: 4
TCPSackShiftFallback: 117
IpExt:
InBcastPkts: 47823
InOctets: 268786870
OutOctets: 327700594
InBcastOctets: 5362997
Re: NagiosXI New Install
Posted: Fri May 25, 2012 10:52 am
by scottwilkerson
How often are you seeing the timeouts? is there any patters, like they all happen in a tight interval, and then run fine for a while?
Re: NagiosXI New Install
Posted: Sun May 27, 2012 8:55 pm
by scrantic
Hi Scott, It's sporadic no real pattern. You don't really get a cluster of them all at once just one host might time-out and then you don't see anything for a few hours.
Re: NagiosXI New Install
Posted: Tue May 29, 2012 9:54 am
by scottwilkerson
What version is the new XI server?
Re: NagiosXI New Install
Posted: Tue May 29, 2012 4:46 pm
by scrantic
Latest version XI 2011R2.4