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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.
