VCLをTDDで書いてデプロイする

TDD VCL @hmsk 2011/06/18

@hmskKengo Hamasaki / @hmsk / id:hxmasaki Varnish2.1.5Varnish, Maatkit, Android, DevOps

VCLVarnish Conﬁguration LanguageVCL -> C -> Binary varnishd 1 ...etc

http://www.varnish-cache.org/trac/wiki/VarnishInternals

sub vcl_fetch { unset beresp.http.Set-Cookie; if (!beresp.cacheable) { return (pass); } else if (beresp.status > 200) { set beresp.ttl = 0m; } else { set beresp.ttl = 1h; } return (deliver); }http://www.varnish-cache.org/trac/wiki/VarnishInternals

VCL <-

VCL <- <-

VCL <- Message from VCC-compiler: Expected an action, if, { or } (input Line 19 Pos 5) purge_url(req.url); <- ----#########---------- Running VCC-compiler failed, exit 1

VCL <- <- <-

VCL <- log "[purge]" req.url; log "[pipe]"req.url; log "[hit]"req.url; <- log "[miss]"req.url; log "[healthcheck-fail-OtherVarnish!]"req.url; <-

VCL <- <- <-

We need Tests !

bin/varnishtest

bin/varnishtest varnishncsavarnilog varnishsizesvarnishreplay varnishtestvarnishstatvarnishtopvarnishadmvarnishhist

varnishtestVCL VarnishVarnish (ACL)

varnishtestVCL Varnish # Start a varnish instance called "v1" varnish v1 -arg "-b localhost:9080" -startVarnish (ACL)

varnishtest # Create a server thread called "s1"VCL server s1 { Varnish # Receive a request rxreqVarnish # Send a standard response (ACL) txresp -hdr "Connection: close" -body "012345n" } # Start the server thread server s1 -start

varnishtest # Create a client thread called "c1"VCL client c1 { Varnish # Send a request txreq -url "/"Varnish # Wait for a response (ACL) rxresp # Insist that it be a success expect resp.status == 200 }

$ varnishtest -v varnishtest.vcltest

TDD VCL /

VarnishMac Homebrew $ brew install varnish3 https://gist.github.com/1027753

Vim (vcl.vim) http://cvs.pld-linux.org/cgi-bin/cvsweb.cgi/packages/ vim-syntax-vcl/vcl.vimEmacs (vcl-mode.el) http://varnish-cache.org/svn/trunk/varnish-tools/ emacs/vcl-mode.el

watchr varnishtest

watchr varnishtest[hamasaki@] # cat varnishtest.watchrwatch((.*).vtest) { |md| system("/usr/local/bin/varnishtest -v #{md[0]}") }

Capistrano

$ cap varnish:deploy$ cap varnish:purge github

VMODhttp://www.varnish-cache.org/docs/trunk/reference/vmod.htmlVarnish 3.0VCL VCLVMODVCL

VMOD ... VCL ...

VMOD if (req.http.Accept-Encoding) { if (req.url ~ ".(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg) $") { # No point in compressing these unset req.http.Accept-Encoding; } else if (req.http.User-Agent ~ "MSIE 6") { unset req.http.Accept-Encoding; ... } else if (req.http.Accept-Encoding ~ "gzip") { set req.http.Accept-Encoding = "gzip"; VCL } else if (req.http.Accept-Encoding ~ "deﬂate") { set req.http.Accept-Encoding = "deﬂate"; } else { # unknown algorithm unset req.http.Accept-Encoding; } ... }

https://github.com/varnish/libvmod-example

VCL TDD ->VMOD

Thank you !TDD VCL @hmsk 2011/06/18

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VCLをTDDで書いてデプロイする

by Kengo HAMASAKI on Jun 20, 2011

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VCLをTDDで書いてデプロイする — Presentation Transcript