Varnish Close the connection on long files
Goncalo Garcia
ghfg at co.sapo.pt
Wed Jun 27 14:29:36 CEST 2012
On Tue, 26 Jun 2012 22:55:49 -0700
Abraham Cruz Sustaita <abraham.sustaita at buscacorp.com> wrote:
> We have a lot of videos. Some of them of 500Mb, and when the users
> want to dowload them, varnish close the connection before the file is
> fully downloaded. We know this is the problem cause everytime we
> receive the same file but with differents sizes. If the connection is
> slow, the file is smaller. I really can't figure where the problem
> is...
Hi,
have you looked at the send_timeout option in varnishd?
% man varnishd
"Send timeout for client connections. If the HTTP response hasn't
been transmitted in this many seconds the session is closed. See
setsockopt(2) under SO_SNDTIMEO for more information."
We had a similar situation with some videos, after 60 seconds(default)
the download was interrupted.
ghfg
> This is the configuration I have:
>
> backend app01 {
> .host = "app01.xxxxxx.com";
> .port = "80";
> .connect_timeout = 1.5s;
> .first_byte_timeout = 45s;
> .between_bytes_timeout = 30s;
> .probe = {
> .url = "/";
> .interval = 5s;
> .timeout = 1s;
> .window = 5;
> .threshold = 3;
> }
> }
> director app_director round-robin {
> { .backend = app01; }
> }
>
> #acl internal {
> # "localhost";
> # "127.0.0.1";
> #}
>
> acl purge {
> "localhost";
> "192.168.11.0"/24;
> }
>
> sub vcl_recv {
>
> if (req.request == "PURGE") {
> if (!client.ip ~ purge) {
> error 405 "Not allowed.";
> }
> ban("req.url = " + req.url);
> return (lookup);
> }
>
> # Normalize the host header
> # --
> if (req.http.Host ~ "(?i)^(www.)?xxxxx.com") {
> set req.http.host = "www.xxxxxxx.com";
> }
>
> # Use anonymous, cached pages if all backends are down.
> if (! req.backend.healthy) {
> unset req.http.Cookie;
> set req.grace = 1h;
> } else {
> set req.grace = 30s;
> }
>
> # Add the X-Forwarded-For header
> # --
> if (req.restarts == 0) {
> if (req.http.x-forwarded-for) {
> set req.http.X-Forwarded-For = req.http.X-Forwarded-For + ", " +
> client.ip;
> } else {
> set req.http.X-Forwarded-For = client.ip;
> }
> }
>
> # Sanely handle the request based on the type
> # --
> if (req.request != "GET" &&
> req.request != "HEAD" &&
> req.request != "PUT" &&
> req.request != "POST" &&
> req.request != "TRACE" &&
> req.request != "OPTIONS" &&
> req.request != "DELETE") {
> /* Non-RFC2616 or CONNECT which is weird. */
> return (pipe);
> }
>
> # Request by post needs no cache
> # --
> if (req.request == "POST") {
> return (pass);
> }
>
> # Admin needs no cache
> # --
> if (req.http.Host ~ "(?i)^(admin.)?xxxxxx.com") {
> return (pass);
> }
>
> # Always cache the following file types for all users.
> if (req.url ~
> "(?i)\.(png|gif|jpeg|jpg|ico|swf|flv|avi|mov|wmv|css|js|html|htm)(\?[a-z0-9]+)?$")
> {
> unset req.http.Cookie;
> return (lookup);
> }
>
> # Login and logout needs no cache
> # --
> if (req.url ~ "^/usuario/salir" || req.url ~
> "^/usuario/redirectWindow" || req.url ~ "^/usuario/al") {
> return (pass);
> }
>
> # No save at cache the user profile
> if (req.url ~ "^/usuario/([0-9]+)/(.*?)/") {
> return (pass);
> }
>
> # Requests to /no-cache/ needs no cache
> # --
> if (req.request == "GET" && req.url ~ "^/no-cache") {
> return (pass);
> }
> if (req.request == "GET" && req.url ~ "^/rss/xxxxx") {
> return (pass);
> }
>
> # Not sure what could match here, but it's in the default.vcl
> # --
> if (req.request != "GET" && req.request != "HEAD") {
> /* We only deal with GET and HEAD by default */
> return (pass);
> }
>
> # Handle compression correctly. Different browsers send different
> # "Accept-Encoding" headers, even though they mostly all support
> the same # compression mechanisms. By consolidating these compression
> headers into # a consistent format, we can reduce the size of the
> cache and get more hits.=
> # @see: http:// varnish.projects.linpro.no/wiki/FAQ/Compression
> if (req.http.Accept-Encoding) {
> if (req.http.Accept-Encoding ~ "gzip") {
> # If the browser supports it, we'll use gzip.
> set req.http.Accept-Encoding = "gzip";
> }
> else if (req.http.Accept-Encoding ~ "deflate") {
> # Next, try deflate if it is supported.
> set req.http.Accept-Encoding = "deflate";
> }
> else {
> # Unknown algorithm. Remove it and send unencoded.
> unset req.http.Accept-Encoding;
> }
> }
>
> # Cache all requests by default, overriding the standard Varnish
> behavior if (req.request == "GET" || req.request == "HEAD") {
> /* We only deal with GET and HEAD by default */
> #unset req.http.Cookie;
> return (lookup);
> }
>
> # If there's a cookie left aft this point do not cache
> # or is this easier to keep in the cookie deletion above?
> # --
> if (req.http.Authorization || req.http.Cookie) {
> /* Not cacheable by default */
> return (pass);
> }
>
> # If we get here, try the cache
> # --
> return (lookup);
>
> }
>
> sub vcl_pipe {
> return (pipe);
> }
>
> sub vcl_pass {
> return (pass);
> }
>
> sub vcl_hash {
> # Include cookie in cache hash.
> # This check is unnecessary because we already pass on all cookies.
> #if (req.http.Cookie) {
> # #set req.hash += req.http.Cookie;
> # hash_data(req.http.Cookie);
> #}
> }
>
> sub vcl_hit {
> if (req.request == "PURGE") {
> purge;
> error 200 "Purged";
> }
> }
>
> sub vcl_miss {
> if (req.request == "PURGE") {
> purge;
> error 200 "Purged";
> }
> }
>
> sub vcl_fetch {
>
>
> # remove all cookies
> # unset beresp.http.set-cookie;
>
> # cache for 12 hours
> # set beresp.ttl = 2h;
>
> # Don't allow static files to set cookies.
> if (req.url ~
> "(?i)\.(png|gif|jpeg|jpg|ico|swf|css|js|html|htm|mp4|flv)(\?[a-z0-9]+)?$")
> { unset beresp.http.set-cookie;
> set beresp.ttl = 12h;
> } else {
> set beresp.ttl = 30m;
> }
>
> # If the backend server doesn't return properly, don't send another
> connection to it
> # for 60s and try another backend via restart.
> #
> #
> https://www.varnish-cache.org/docs/trunk/tutorial/handling_misbehaving_servers.html
> # --
> if(beresp.status == 500 || beresp.status == 503) {
> if (req.restarts > 3) {
> set beresp.saintmode = 5m;
> }
> if (req.request != "POST") {
> return(restart);
> } else {
> error 500 "Failed";
> }
> }
>
> # Allow items to be stale if needed.
> set beresp.grace = 1h;
>
> }
>
> sub vcl_deliver {
> # if (resp.http.magicmarker) {
> # unset resp.http.magicmarker;
> # set resp.http.age = "0";
> # }
>
> if (obj.hits > 0) {
> set resp.http.X-Cache = "HIT";
> } else {
> set resp.http.X-Cache = "MISS";
> }
> return (deliver);
> }
>
> # In the event of an error, show friendlier messages.
> sub vcl_error {
> # Otherwise redirect to the homepage, which will likely be in the
> cache. set obj.http.Content-Type = "text/html; charset=utf-8";
> synthetic {"
> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "
> http://www.w3.org/TR/html4/loose.dtd">
> <html>
> <head>
> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
> <title>..:: XXXXX :: Por el momento estamos en mantenimiento
> ::..</title>
>
> </head>
> <body>
>
> <div class="logo">En mantenimiento</div>
> <div class="text">Estamos experimentando problemas. Vuelve
> más tarde.</div>
> <div style="display:none;">(Error "} + obj.status + " " +
> obj.response
> + {")</div>
> </body>
> </html>
> "};
> return (deliver);
> }
>
> sub vcl_init {
> return (ok);
> }
>
> sub vcl_fini {
> return (ok);
> }
--
Chaos umpire sits,
And by decision more embroils the fray
By which he reigns: next him high arbiter
Chance governs all.
-- Milton, Paradise Lost
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