Dev/Varnish
From Whonix
< Dev
.
Contents
- 1 Varnish Cheat Sheet
- 1.1 Show most requested URLs from backend
- 1.2 Show specific requested URLs from backend
- 1.3 Show requests for single URL
- 1.4 Show backend responses
- 1.5 HTTP Purges
- 1.6 Show HTTP requests
- 1.7 Show HTTP purges
- 1.8 Ban single URL
- 1.9 Ban all URLs
- 1.10 Show how many connections are currently open
- 1.11 wordpress Total Cache varnish setup
- 1.12 list of all variables such as client.ip
- 1.13 default built-in vcl
- 1.14 Show nuked items
- 2 whonix.org
- 3 varnish advantages
- 4 Feature Requests
- 5 Debugging
Varnish Cheat Sheet[edit]
For Varnish 4.
Show most requested URLs from backend[edit]
varnishtop -i BereqURL
Show specific requested URLs from backend[edit]
varnishlog -q 'BereqURL ~ "^/forum/Themes/default/scripts/"
Show requests for single URL[edit]
varnishlog -q 'ReqURL ~ "^/wiki/Translatetest"'
Show backend responses[edit]
varnishlog -g request -q "RespStatus eq 503"
varnishlog -g request -q "BerespStatus eq 503"
HTTP Purges[edit]
curl -X "PURGE / HTTP/1.0" 127.0.0.1:6081/adrelanos.asc
or: curl --head -X "PURGE / HTTP/1.0" 127.0.0.1:6081/adrelanos.asc
check (Resets Age in http header to 0.): curl --head https://www.whonix.org/adrelanos.asc
Show HTTP requests[edit]
varnishlog -q "ReqMethod eq PURGE"
Show HTTP purges[edit]
varnishlog -q "VCL_return eq purge"
Ban single URL[edit]
varnishadm 'ban req.url ~ "/adrelanos.asc"'
varnishadm 'ban req.url ~ "/wiki/Translatetest"'
Ban all URLs[edit]
varnishadm 'ban req.url ~ "."'
Show how many connections are currently open[edit]
netstat -anp | grep :443 | grep ESTABLISHED | wc -l
wordpress Total Cache varnish setup[edit]
wordpress → Performance (on the side) → General Settings → Reverse Proxy
127.0.0.1:6081
run in shell: varnishlog -q "VCL_return eq purge"
test: wordpress → Performance (at the top) → empty all cache
list of all variables such as client.ip[edit]
https://www.varnish-cache.org/docs/trunk/reference/vcl.html
default built-in vcl[edit]
https://www.varnish-cache.org/trac/browser/bin/varnishd/builtin.vcl?rev=4.0
Show nuked items[edit]
Elements that have been removed from cache due to lack of memory.
varnishstat -1 -f MAIN.n_lru_nuked
whonix.org[edit]
/etc/default/varnish
## Patrick: changed from ## -s malloc,256m ## to ## -s malloc,8G
varnish advantages[edit]
- devicedetect.vcl for mobile devices for mediawiki
Feature Requests[edit]
Debugging[edit]
- https://www.whonix.org/wiki/Main_Page?action=purge
- see if purge request is registered
- https://www.mediawiki.org/wiki/Manual:Purge
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