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Is there a way to check varnish configuration syntax without actually using the new version?

I'm searching for a native varnish equivalent of apache2ctl configtest

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1 Answer 1

up vote 3 down vote accepted

You can ask Varnish to compile your VLC file to a temporary file. This is part of our script that loads a new configuration into our varnish servers:

trap 'rm -f $tmpfile' 0
varnishd -C -f /srv/web/fe/varnish/default.vcl > $tmpfile

if [ ! -s $tmpfile ]; then
    echo "ERROR: There are errors in the varnish configuration." >&2
    exit 1

This works because varnishd -C will not generate any output on stdout if there are errors in the VCL.

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