To monitor Varnish performance, LogicMonitor collector uses SNMP extensions to trigger a script, which runs ‘varnishstat -1’ command on the server.
To enable data collection, please do the following on each of your Varnish servers:
1. Create a script “varnishparse” in /usr/local/bin:
#!/bin/bash
/usr/bin/varnishstat -1 -f $1 | awk ' { print $2 } '
2. Put all of the following into the /etc/snmp/snmpd.conf file (after you’ve configured SNMP):
extend varnish-client-req /usr/local/bin/varnishparse client_req
extend varnish-client-conn /usr/local/bin/varnishparse client_conn
extend varnish-cache-hits /usr/local/bin/varnishparse cache_hit
extend varnish-cache-miss /usr/local/bin/varnishparse cache_miss
extend varnish-cache-hitpass /usr/local/bin/varnishparse cache_hitpass
extend varnish-backend-unused /usr/local/bin/varnishparse backend_unused
extend varnish-backend-unhealthy /usr/local/bin/varnishparse backend_unhealthy
extend varnish-backend-reuse /usr/local/bin/varnishparse backend_reuse
extend varnish-backend-recycle /usr/local/bin/varnishparse backend_recycle
extend varnish-backend-fail /usr/local/bin/varnishparse backend_fail
extend varnish-backend-busy /usr/local/bin/varnishparse backend_busy
extend varnish-backend-conn /usr/local/bin/varnishparse backend_conn
extend varnish-s-sess /usr/local/bin/varnishparse s_sess
extend varnish-s-req /usr/local/bin/varnishparse s_req
extend varnish-s-pipe /usr/local/bin/varnishparse s_pipe
extend varnish-s-fetch /usr/local/bin/varnishparse s_fetch
extend varnish-s-pass /usr/local/bin/varnishparse s_pass
extend varnish-s-hdrbytes /usr/local/bin/varnishparse s_hdrbytes
extend varnish-s-bodybytes /usr/local/bin/varnishparse s_bodybytes
extend varnish-n-object /usr/local/bin/varnishparse n_object
extend varnish-n-wrk /usr/local/bin/varnishparse n_wrk
extend varnish-n-wrk-max /usr/local/bin/varnishparse n_wrk_max
extend varnish-n-wrk-overflow /usr/local/bin/varnishparse n_wrk_overflow
extend varnish-n-wrk-drop /usr/local/bin/varnishparse n_wrk_drop
extend varnish-n-lru-nuked /usr/local/bin/varnishparse n_lru_nuked
extend varnish-n-expired /usr/local/bin/varnishparse n_expired
extend varnish-n-wrk-queue /usr/local/bin/varnishparse n_wrk_queue
extend varnish-n-wrk-failed /usr/local/bin/varnishparse n_wrk_failed
extend varnish-n-wrk-create /usr/local/bin/varnishparse n_wrk_create
3. Restart snmpd (service snmpd restart).
After you complete the steps above, the Varnish Performance datasource will be associated with proper hosts, and the monitoring will start automatically.