Tag Archives: vcl

How to start up varnish with a custom cc_command on Debian

If you need to compile your varnish VCL file with custom options, maybe because of libraries like GeoIP, and you're running Debian, you can not use the init script that's shipped by default.

It will not work because of how shell expansion works in the start-stop-daemon command contained in the init script. I wrote my explanation and a proposed fix in much more detail in this stack overflow question:


TL;DR: (+ quick & dirty fix) patch your init script like this:

 start_varnishd() {
     log_daemon_msg "Starting $DESC" "$NAME"
     output=$(/bin/tempfile -s.varnish)
-    if start-stop-daemon 
-       --start --quiet --pidfile ${PIDFILE} --exec ${DAEMON} -- 
-       -P ${PIDFILE} ${DAEMON_OPTS} > ${output} 2>&1; then
+    if bash -c "start-stop-daemon 
+        --start --quiet --pidfile ${PIDFILE} --exec ${DAEMON} -- 
+        -P ${PIDFILE} ${DAEMON_OPTS} > ${output} 2>&1"; then
         log_end_msg 0
         log_end_msg 1
         cat $output
         exit 1
     rm $output

Let me know if it works for you!

EDIT (7/Mar/2012): bug was filed in Debian as #659005. Nothing happened so far. We'll see.

A couple of bugs fixed on the varnish accept-language VCL extension

Today I received a report of a bug in how the Opera.com startup page was presented to some browsers. In particular, people with Brazilian language.

This was traced down to being a bug in the accept-language.vcl extension that we are using on both My Opera and Opera.com.

In particular, the bug had to do with static buffers being reused and overwritten during the Accept-Language string parsing, essentially due to my non-optimal C skills :) Now this bug is fixed and new test cases were added, so to hopefully avoid regressions in the future.

So now clients with Accept-Language containing strings like pt-BR, es-ca, zh-CN, etc… will be correctly recognized by the VCL code, and they will get the correct page served by varnish.

As always, thanks to Opera, the code is freely available, and I have to say it's not really experimental dangerous stuff anymore. It's been quite proven in the last few months (these few bugs excluded). At least your Varnish server shouldn't explode :-) Have fun!