Anders Nordby's plugins page

These are plugins I made for the Munin trend-graphing and Nagios monitoring systems. They have an emphasis on FreeBSD, as do I, but I try to support other OSes (Linux in particular) also. If you have any problems with them, feel free to ask. I take no responsibility for the usage of these plugins. If you do find them useful however, please do let me know.

Munin plugins

Name	Type	OSes supported	Description
disk_gstat_data	Disk	FreeBSD	Transfer rate for disk reads and writes from GEOM (gstat).
disk_gstat_ops	Disk	FreeBSD	Disk read and write operations from GEOM (gstat).
disk_gstat_wait	Disk	FreeBSD	Average wait time for disk reads and writes from GEOM (gstat).
open_files	System	FreeBSD	Number of open files on the system.
open_sockets	System	FreeBSD	Number of open sockets on the system.
vmfaults	System	FreeBSD	Number of syscalls, context switches, interrupts etc. per second. Previous version using vmstat also available here.
oracle_sysmetrics.pl	Oracle	Any UNIX	Oracle plugin to show various v$sysmetric performance numbers like number of transactions, user calls, index scans, table scans and physical reads/writes per second.
http_responsetime	Network	Any UNIX	Response time to fetch a web page in milliseconds
snmp_squid_cachehitratio	Squid	Any UNIX	Show the cache hit ratio for Squid, percent of hits being in the cache and not.
snmp_squid_hitrate	Squid	Any UNIX	Number of hits (requests) for Squid per second.
snmp_squid_servicetime	Squid	Any UNIX	Average service time for Squid, in milliseconds.
varnish_allocated	Varnish	Any UNIX	Amount of virtual memory allocated by Varnish.
varnish_cachehitratio	Varnish	Any UNIX	Shows the ratio of requests found in the cache ant not, in percent.
varnish_hitrate	Varnish	Any UNIX	Number of hits (requests) for Varnish, per second.
varnish_resident	Varnish	Any UNIX	Resident memory size of the Varnish-Chld process.
varnish_size	Varnish	Any UNIX	Total memory size of the Varnish-Chld process.
varnish_threads	Varnish	Any UNIX	Number of threads for the Varnish-Chld process.
varnish_total_objects	Varnish	Any UNIX	Total number of objects in the cache.

Some requirements for the gstat plugins: gstat patch gstat.diff, and also run update-gstat.sh from cron every 5th minute.

Nagios plugins

Name	Type	OSes supported	Description
check_diskx	Disk	Any UNIX	Alternative disk space plugin.
check_ciss	Disk	FreeBSD/Linux	Check CISS (Compaq/HP SmartArray) RAID volume status.
check_raid	Disk	FreeBSD	Check RAID status using camcontrol.
check_ethtool	Network	Linux	Check that NIC media settings are like expected, using ethtool.
check_netlink	Network	Solaris	Check that NIC media settings are like expected, using ndd.
check_http_sstring	Network	Any UNIX	Check if a web servers Server HTTP string is as expected.
check_http_purge	Network	Any UNIX	Check that an URL can actually be purged after fetching it from a cache server
check_varnish_cachehitratio	Varnish	Any UNIX	Check if average Varnish cache hit ratio (in %) is above acceptable levels.
check_mailflow	Mail	Any UNIX	Check mail flow, send a mail to a particular SMTP server, then expect to be able to POP it from another within a certain amount of time.
check_mysql_tablesizes	MySQL	Any UNIX	Check if MySQL tables are within Max_Data_Length limit.
check_netmount	System	Any UNIX	Check if network mounts work: if they have any files, have any space used, and. Script will time out if there is a hang.
check_age	System	Any UNIX	Check if a file is too old.
checklocks	System	Any UNIX	Generic script to check for stale lock files in a directory.
check_smbshare	Network	Any UNIX	Check if a samba share works: if smbclient can talk to Samba and if the share is available.