Transcript www.mague.com

Where I Want to be.....
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What I'll Settle For.....
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Requirements
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Rock solid stability
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Automated node addition (discovery)
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Scales horizontally
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Service dependency models
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Easy to write plugins
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Promotes sane workflows
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Unified front end view
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Flexible configuration
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Tool Stack
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What????
but #monitoringsucks and #ihatenagios
How could you?
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In defense of Nagios
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Been around since 1996
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Has Service dependencies
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Easy to write plugins
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Easy-ish to troubleshoot
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ROCK SOLID
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Valid attacks on Nagios
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No automated discovery
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It's complicated to setup
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Text files – really?
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Front end won't win any beauty contests
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Development is slow
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Stats collection is a PITA
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Solutions
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Use Icinga!
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Use Puppet to auto configure
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Stats – leave it to graphite. It's really good at that
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Big boys and girls learn their tools
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Icinga
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Fork of Nagios
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Configurations are compatible
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More solid architecture ( core, API, Web, IDODB )
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Nice front end, nice mobile front end
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Can use NRPE
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High Level View
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Configure Icinga Servers
using Puppet Standard Types
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Things to configure with Standard Types
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icinga.cfg (file)
=> icinga main config file
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Apache icinga.conf (file)
=> http access to each server
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cgiauth.cfg (file)
=> cgi access
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cgi.cfg (file)
=> options, users
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templates.cfg (file) got lazy => use for basic classes
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idomod.cfg (template)
=> template for hostname to DB
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Configure Icinga using Nagios Types
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Puppet Nagios Types
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nagios_command
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nagios_hostgroup
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nagios_contact
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nagios_service
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nagios_contactgroup
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nagios_servicedependency
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nagios_host
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nagios_serviceescalation
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nagios_hostdependency
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nagios_serviceextinfo
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nagios_hostescalation
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nagios_servicegroup
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nagios_hostextinfo
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nagios_timeperiod
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Configuring Hosts
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Overview
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Detailed Overview
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Store Configs
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Store puppet info in a DB
Retrieve information from
DB
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Share info across nodes
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Use thin_storeconfigs
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Set up on puppet master
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Exporting Nagios_host Resources
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Export = Save to DB
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Use facter for dynamic data
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PRO TIP: use ENC
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PRO TIP: use targets
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PRO TIP: hostgroups
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PRO TIP: use tags
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PRO TIP: Use your ENC
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PRO TIP: use targets
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Use cfg_dir in icinga.cfg
Create a unique file per host
or service
Addition and removal are
now super easy
Also default dirs are in a
horrible place /etc/nagios
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PRO TIP: hostgroups
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Add machines to a
hostgroup
Add services to a hostgroup
New machines inherit all of
the services associated with
a hostgroup
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PRO TIP: use tags
Tags allow you to filter
resources so that you only
realize those resources that
you need
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Configuring Services/Commands
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Icinga Services
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OR 'Stuff I want to monitor'
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Associate with a hostgroup
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Use a target
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Icinga Commands
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OR 'What actually gets run'
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Use Macros to set paths in resource.cfg
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Dependencies
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PRO TIP: Dependencies
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Unreliable services
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Cut down on the number of alerts
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Tell me what's really wrong
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Route alerts accordingly
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Nagios_servicedependencies
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NRPE
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NRPE
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Runs on client
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Secured via SSL
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Has ACLs
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Runs as nobody
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Can run commands
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Useful for other things...
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Configuring NRPE
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NRPE Checks
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Plugins
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exchange.nagios.org
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Writing Plugins
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Write in any language
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Output 1 line to stdout
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NRPE/Icinga/Nagios all use exit
codes to determine status
Run by hand to check
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Workflows
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Watching Monitoring
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Scheduling Downtime
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Filtering
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Alerting
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#monitoringisawesome
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REMOVE unreliable checks
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Just MONITOR – don't bolt on - especially stats
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TIER your monitoring
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Use timeperiods for sanity
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Delegate responses
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Use dependencies to pin down problems quickly
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Work smart
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Resources
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Icinga
http://icinga.org
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Puppet
http://docs.puppetlabs.com/references/latest/type.html#nagioscommand
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NRPE
http://nagios.sourceforge.net/docs/3_0/addons.html
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IRC
##infra-talk, #icinga, #puppet
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Contact
[email protected], @maguec, #gaijin (freenode), http://blog.mague.com
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Thanks
Yvonne Kong, Michael Catlin, Juan Ortega, Anthony Kong, Puppet Labs, Icinga Team
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