Like lot's of folks I installed varnish and saw no speed increase on my site. I switched from disk cache to malloc and still, little improvement with a huge miss rate. I started looking into vanish settings and here's what I cam up with. A little background: I'm running wordpress, joomla, and static web pages. I didn't really write this, I just took the most useful stuff from a number of sources (some of their comments I left intact, some are my own). Right now my hit rate is over 50%, the sites behave like they should (including admin access), apache logging works, everything seems good! Feedback is appreciated. If you're doing something different that's working awesome I'd love to check it out.
backend default { .host = "X.X.X.X"; .port = "8181";}
include "/etc/varnish/backends.vcl";
#set IP for apache logging
sub vcl_recv { include "/etc/varnish/sites.vcl";
remove req.http.X-Forwarded-For;
set req.http.X-Forwarded-For = client.ip;
# Setup grace mode.
# Allow Varnish to serve up stale (kept around) content if the backend is
#responding slowly or is down.
# We accept serving 6h old object (plus its ttl)
if (! req.backend.healthy) {
set req.grace = 6h;
} else {
set req.grace = 15s;
}
# If our backend is down, unset all cookies and serve pages from cache.
if (!req.backend.healthy) {
unset req.http.Cookie;
}
# Drop any cookies sent to Wordpress.
if(
req.url ~ "^/administrator" ||
req.url ~ "^/component/banners" ||
req.url ~ "^/component/users" ||
req.url ~ "^/wp-admin" ||
req.url ~ "^/wp-login.php" ||
req.url ~ "^/any-other-url-path"
) {
return (pass);
} else {
unset req.http.cookie;
}
# As mentioned before, remove all cookies for static files, images etc
# Varnish will always cache the following file types and serve them (during TTL).
# Note that Drupal .htaccess sets max-age=1209600 (2 weeks) for static files.
if (req.url ~ "(?i)\.(bmp|png|gif|jpeg|jpg|doc|pdf|txt|ico|swf|css|js|html|htm)(\?[a-z0-9]+)?$") {
// Remove the query string from static files
set req.url = regsub(req.url, "\?.*$", "");
unset req.http.Cookie;
# Remove extra headers
# We remove Vary and user-agent headers that any backend app may set
# If we don't do this, Varnish will cache a separate copy of the resource
# for every different user-agent
unset req.http.User-Agent;
unset req.http.Vary;
return (lookup);
}
}
#####
#If something gets super popular, super cache it
sub vcl_hit {
if (obj.hits == 500) {
set obj.ttl = 3h;
} elsif (obj.hits == 10000) {
set obj.ttl = 2d;
} elsif (obj.hits == 1000000) {
set obj.ttl = 4w;
}
}
#####
#shutdown backend connections so unprivileged users don’t get privileged content
sub vcl_pass {
set bereq.http.connection = "close";
if (req.http.X-Forwarded-For) {
set bereq.http.X-Forwarded-For = req.http.X-Forwarded-For;
}
else {
set bereq.http.X-Forwarded-For = regsub(client.ip, ":.*", "");
}
}
#####
#shutdown backend connections so unprivileged users don’t get privileged content
sub vcl_pipe {
set bereq.http.connection = "close";
if (req.http.X-Forwarded-For) {
set bereq.http.X-Forwarded-For = req.http.X-Forwarded-For;
}
else {
set bereq.http.X-Forwarded-For = regsub(client.ip, ":.*", "");
}
}
#####
sub vcl_fetch {
# Don't allow static files to set cookies. Cache static content for a long time
if (req.url ~ "(?i)\.(bmp|png|gif|jpeg|jpg|doc|pdf|txt|ico|swf|css|js|html|htm)(\?[a-z0-9]+)?$") {
unset beresp.http.set-cookie;
# default in Drupal, you may comment out to apply for other cms as well
set beresp.ttl = 2w;
}
#Cache stuff you shouldn’t for a min, just bout everything else a day
if (beresp.ttl < 24h) {
if (beresp.http.Cache-Control ~ "(private|no-cache|no-store)") {
set beresp.ttl = 60s;
}
else {
set beresp.ttl = 24h;
}
}
if (beresp.status == 301) {
set beresp.ttl = 1h;
return(deliver);
}
# Allow items to be stale if backend goes down. This means we keep around all objects for 6 hours beyond their TTL which is 2 minutes
# So after 6h + 2 minutes each object is definitely removed from cache
set beresp.grace = 6h;
# If you need to explicitly set default TTL, do it below.
# Otherwise, Varnish will set the default TTL by looking-up
# the Cache-Control headers returned by the backend
# set beresp.ttl = 6h;
# if you have misbehaving sites (i.e Drupal6 or cookie-setters)
# and you have forced Varnish to cache them in vcl_recv,
# here you can instruct Varnish about their ttl, and
# force Varnish to strip any cookies send from backend
#if (req.http.host ~ "(?i)^(www.)?yourURL.com") {
# unset beresp.http.set-cookie;
# set beresp.http.Cache-Control = "public,max-age=602";
# set beresp.ttl = 120s;
#}
}
Topic: default.vcl discussion (Read 17208 times)
