Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)
description
Transcript of Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)
![Page 1: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/1.jpg)
Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)
Greg Wickham
APANJuly 2005
![Page 2: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/2.jpg)
Is the network being monitored correctly?
Greg Wickham
APANJuly 2005
![Page 3: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/3.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 4: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/4.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 5: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/5.jpg)
GrangeNet Architecture
![Page 6: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/6.jpg)
GrangeNet Monitoring
Device Types Quantity
Routers 6Servers 6Switches 4
16
![Page 7: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/7.jpg)
GrangeNet Monitoring
Device Types Quantity Probes
Routers 6 310Servers 6 6Switches 4 7
16 323
![Page 8: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/8.jpg)
GrangeNet Monitoring
Device Types Quantity Probes
Routers 6 310Servers 6 6Switches 4 7
16 323
Nagios Lines (services.cfg) 3172
![Page 9: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/9.jpg)
GrangeNet Monitoring (ACT Edge)
Probe Types Quantity NotesFan 3Hardware 17Ping 1Power 2Temperature 1 (39)Interfaces 16MSDP Peerings 8BGP Peerings 15OSPF 2
Total Probes: 65
![Page 10: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/10.jpg)
GrangeNet Monitoring (ACT Edge)
• Is that everything that can be monitored?
![Page 11: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/11.jpg)
GrangeNet Monitoring (ACT Edge)
• Is that everything that can be monitored?
No!
![Page 12: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/12.jpg)
GrangeNet Monitoring (ACT Edge)
• Is that everything that can be monitored?
No!• What else?
– BGP address family peerings• Multicast / Unicast / IPv6
– Software versions– Hardware versions– Latency (of links)– Usage (of links)– …
![Page 13: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/13.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 14: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/14.jpg)
Monitoring Solution
• Solution Goals:–Verifying network is correctly monitored–Minimise replication of data–Simplistic integration with existing systems–Easy to maintain–Extensible–Flexible–Efficient
![Page 15: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/15.jpg)
Monitoring Overview
• Facts:–Networks change–Updating is tedious–Monitoring Difficult to Auditing
• Answers Required:–Is the network performing optimally?–Has a change occurred?–What is the status of the network?–Is the monitoring accurate?
![Page 16: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/16.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 17: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/17.jpg)
Solution Architecture
MonitoringConfiguration
•Configuration data stored as XML•Describes:
•Devices to monitor•How to monitor•Nagios templates•Device Templates
![Page 18: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/18.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
•Daemon reads configuration data•Verifies devices are monitored correctly•Generates Nagios Configurations•Performs device probes•Runs periodically
![Page 19: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/19.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
Nagios configurationautomatically generatedby Monitoring Daemon
![Page 20: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/20.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Nagios uses configuration supplied bymonitoring daemon;Nagios configured to use ‘passive’ checks
![Page 21: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/21.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Network Devices
Monitoring daemon queries all devicesusing SNMP;Check device telemetry againstknown configurations
![Page 22: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/22.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Network Devices
Monitoring daemon sendsProbe status direct to Nagios(Nagios running passive checks)
![Page 23: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/23.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Network Devices
SMS
Web
Nagios reports on networkhealth as usual but does noactive checking of its own
![Page 24: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/24.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Network Devices
SMS
Web
Report
Report generated of devicemonitoring comparison
![Page 25: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/25.jpg)
Solution Architecture
MonitoringConfiguration
MonitoringDaemon
NagiosConfiguration
NagiosDaemon
Network Devices
RRDtool
SMS
Web
Report
Collected data fed tooptional sub-systems
![Page 26: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/26.jpg)
Solution Architecture
• Result–Only one process communicates to all devices
Very EfficientQuery time for 34 devices is < 10 seconds
–As only one daemon communicates to the devices the load on each network device is minimised (collected data is distributed as necessary)
–As Nagios does less work the monitoring server is less loaded (Nagios is heavy)
![Page 27: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/27.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 28: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/28.jpg)
Monitoring Verification
• Templates are used to define pre-requisite monitoring probes
• Devices are attached to templates
![Page 29: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/29.jpg)
Monitoring Verification
Device Description<device> <alias>edge1.vic</alias> <address>202.0.98.68</address> … <module type="nagios"> <template>ibgp-mesh</template> <template>ebgp-peerings</template> <template>ospf</template> <template>system</template> … <probe type=“ibgp-mesh" description="AS18062 - edge1.nsw“ arg=“202.0.98.13” /> <probe type=“ebgp-peering" description="AS64670“ arg=“202.0.98.190” />
… </module>
</device>
![Page 30: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/30.jpg)
Monitoring Verification
Template Description
<template name=“ibgp-mesh"> <template>system-health</template>
<probe name=“ibgp-mesh" inheirit="bgp-standard"> <attribute type="field">bgpPeerState</attribute> <attribute type="notify">gn-noc</attribute> <attribute type="level">level1-service</attribute> <match> <field name="bgpPeerRemoteAs" value="18062" /> <field name="bgpPeerState" value="up" /> </match> </probe>
</template>
![Page 31: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/31.jpg)
Monitoring Verification
• From the:–Device template; and–Monitoring Template
an accurate report can be generated of the status of monitoring.
• All probe details are stored in XML so can be easily verified
![Page 32: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/32.jpg)
Contents
• Background• Monitoring Overview / Requirements• Solution Architecture• Monitoring Verification• Conclusion
![Page 33: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/33.jpg)
Conclusion
• Due to efficiencies in the monitoring daemon:–Nagios doesn’t load the server–Other applications can share the SNMP data–Doesn’t load the network devices–Device probing is very quick
• Reduces complexity of Nagios configuration• Generate reports identifying inaccuracies in existing monitoring
• Unified configuration dataThis is a Work in Progress
![Page 34: Keeping Network Monitoring Current using Automated Nagios Configurations (WIP)](https://reader035.fdocuments.us/reader035/viewer/2022062816/5681569f550346895dc441b8/html5/thumbnails/34.jpg)
Status (Work in Progress)
• Current functionality:– Separate applications:
• Collecting data from devices; feed into Nagios• Generating Nagios configurations
• To Do– Integrate applications– Complete Implementation Nagios templates– Documentation!
• Software– Perl– net-snmp– Nagios