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Script to check using Net::Telnet. Expect-like passing of commands/arguments and returning data. Verifies serial console (or telnet…) is responding and that its banner matches some string (like its hostname).
Current Version
Last Release Date
June 23, 2009
Owner
Nagios Exchange
Compatible With
Production release. All reported bugs addressed.
Primary uses: 1) check telnet banner for a matching return string. 2) log in via telnet and run specified command, check output for string. Handy for: -Screen scraping last console output from Cyclades ACS (or any console server supporting terminal buffering) for automatic inclusion in crash report, Nagios alert email, etc. -Periodically checking to make sure serial console is still attached/working... for when you DO need it. -Using in a custom host check, to determine if host is _really_ down and not responding on serial console. -Last-ditch eventhandler usage, for starting SSH if dead (or any other arbitrary thing... as long as you can still log in via console). / command run/output example: root@monitor02 libexec# ./check_telnet.pl -H deathstar1001-console -C 'date --iso-8601' -user username -password 'password' date --iso-8601 2006-12-15 / testing console login banner: root@monitor02 libexec# ./check_telnet.pl -H deathstar1001-console -M deathstar1001 OK: host (deathstar1001) matches login banner. root@monitor02 libexec# ./check_telnet.pl -H deathstar1001-console -M deathstar1002 CRITICAL: host (deathstar1002) did not match login banner.
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