Varnish Quick Reference Commands

Varnish Cheat Sheet

# Check this too
# https://docs.fastly.com/guides/vcl/vcl-regular-expression-cheat-sheet

Health check backend servers:
varnishadm debug.health

Show requests that generate a 404 error:
varnishlog -q 'RespStatus == "404"'|egrep -i "ReqURL|ReqHeader      Host:|Forwarded-For"

Show full requests for any 404 errors, 503, etc...
varnishlog -q 'RespStatus == 404' -g request

Show full request for a URL that has "wolf" in it...
varnishlog -q request -q 'ReqURL ~ "wolf"'

Get the top request methods
varnishtop -i ReqRequest

Top urls that missed the cache.
varnishtop -i RespURL

Top urls that HIT the cache.
varnishtop -i ReqURL

All urls that MISSED the cache in real time
varnishlog -i RespURL

Most frequent cookies:
varnishtop -i ReqHeader -I Cookie

Continually updated list of frequent URLs:
varnishtop -i ReqURL

Most frequent UA strings:
varnishtop -i ReqHeader -C -I ^User-Agent

Frequent charset (Accept-Charset can be replaced with any other HTTP header):
varnishtop -i ReqHeader -C -I '^Accept-Charset'

View top useragents:
varnishtop -C -b -i RespHeader -I "user-agent"

Top X-Robots-Tags (backend, front-end and object)
varnishtop -i RespHeader -I '^X-Robots-Tag'

Traffic sources:
varnishtop -i ReqHeader -I \^Referer

which pages are getting hit overall
varnishncsa | awk '{print $7}'

Which pages the IP address 127.0.0.1 is hitting:
varnishncsa | grep 192.168.1.31 | awk '{print $7}'

#
# -m Option: Some May not work.. i.e. -m with Varnish v4 - SK
#
Requests resulting in 404's:
varnishlog -b -m "ReqStatus:404"

IP addresses hitting the /clients URL:
varnishlog -m 'ReqURL:/clients' |grep 'X-Forwarded-For'

#
# -o Option: Some May not work.. i.e. -o with Varnish v4 - SK
#
All urls that hit the cache in real time.
varnishlog -o VCL_call hit | grep ReqURL

Look at an incoming client request of a specific URL:
varnishlog -c -o ReqURL index.html

Look at a backend request of a specific URL:
varnishlog -b -o TxURL index.html

See requests for one specific Hostname:
varnishlog -c -o ReqHeader "Host: example.com"

See the age of the cache objects for a specific hostname:
varnishlog -c -o ReqHeader "Host: example.com" | grep Age

Thanks for the overview!

Note: The command for Top urls that HIT the cache. and Continually updated list of frequent URLs: are both the same, according to this document.

The command varnishtop -i ReqURL only provides a continually updated list which also includes PASSed requests. SoTop urls that HIT the cache. is wrong in this case.