how to customize 503 error - varnish 4
error-handling,varnish,varnish-vcl,http-status-code-503
According to Varnish Processing States control after backend_error() should be passed to vcl_synth(), but in reality the error page you are seeing is delivered unconditionally in backend_error() of builtin.vcl. Either you customize your webpage there or you add sub vcl_backend_error { return(retry); } in your vcl to force the jump...
Varnish not starting errors in syntax
wordpress,caching,varnish,varnish-vcl
If you are using varnish 3.x rather than 4.x: Replace req.method with req.request if (req.request == "PURGE") { ...
When to increase VARNISH_STORAGE_SIZE?
You are looking for n_lru_nuked. If that is larger than zero then - to make space for new objects - Varnish had to remove old objects before their TTL expired. This is either bad cache design (when caching everything for 10 years) or simply there is not enough space.
Varnish rewrites location header
Solved :) The problem was in balancer (Pound) config. Internet -> Pound -> Nginx as SSL-Offloader -> Varnish -> Nginx + PHP I set RewriteLocation to 0 and it solve the issue....
Ignore utm_* values with varnish?
caching,url-rewriting,varnish,varnish-vcl
This did the trick... it's not perfect according to my own question though as it ignores ALL query params, not just utm ones. When I need to actually implement a non-utm value which changes the content I will need to revisit this regex: sub vcl_recv { set req.url = regsub(req.url,...
Efficient delivery of maintenance page from Varnish
I do two things for my custom maintenance pages. I use a CDN or image host (see Amazon S3, CloudFlare, Akamai, Imgur, etc) to host all images on the page (for big sites I recommend a CDN, CloudFlare has a free plan). Then I move the HTML for the page...
how to use varnish cache with set-cookie named mp3list and phpsessionid
As you are noticing PHP sessions and Varnish do not intermix very nicely, ie the phpsessions destroys the cachebility of the urls within varnish as it makes them all unique. Options: 1. disable php sessions altogether (doubt thats a real option for you). 2. Only enable php sessions on the...
varnish: how to split log files based on vhosts
It's the "-q" option. Here's a working sample: varnishncsa -a -D \ -q 'ReqHeader:Host ~ "mywebsite"' \ -w /web/logs/mywebsite/access.varnish.log \ -P /var/run/varnishncsa.mywebsite.pid ...
varnish cache banning with pattern matching
The answer is to use: if (req.request == "BAN") { if (req.http.X-Debug != "True") { error 405 "Not allowed."; } ban("obj.http.x-url ~ " + req.url); error 200 "ban added"; } Whilst this will return 200 regardless if the item in the cache exists or not, it does add the ban....
Varnish backend host directly in vcl_recv?
Yes I think you are referring to req.backend/req.backend_hint in vcl_recv(), in Varnish 3 syntax: backend www { .host = "www.example.com"; .port = "http"; } sub vcl_recv { if (req.http.host ~ "(?i)^(www.)?example.com$") { set req.backend = www; } } And in Varnish 4 syntax: backend www { .host = "www.example.com"; .port...
Several questions about this Varnish VCL
ruby-on-rails,caching,mobile,varnish,varnish-vcl
As to point 1, your X-UA-Device is a custom header for internal consumption, ie by default not exposed to the external world. To ensure the external caches/proxies understand you are considering the device/user-agent in the response, you have to update the Vary with a header which reflect this. this is...
Varnish: how to cache a URL with parameters - need to strip multiple parameters but not all
After a bit of experimentation, I found a way to do this. # Strip out query parameters that do not affect the page content set req.url = regsuball(req.url, "([\?|\&])+(utm_campaign|utm_content|utm_medium|utm_source|utm_term|ITO|et_cid|et_rid|qs|itq|ito|itx\[idio\])=[^&\s]+", "\1"); # Get rid of trailing & or ? set req.url = regsuball(req.url, "[\?|&]+$", ""); # Replace ?& set req.url =...
Varnish (4.0.1) fail to access website often request timeout
apache,varnish,varnish-vcl,apache2.4,centos7
You need to allow traffic from the Internet to port 80. Edit the iptables config as follows: # sample configuration for iptables service # you can edit this manually or use system-config-firewall # please do not ask us to add additional ports/services to this default configuration *filter :INPUT ACCEPT [0:0]...
No load time difference with and without varnish
Varnish shoudln't have a real impact on static files, especially when they're located on a SSD. Very heavy frequented sites may be an exception, particulary when the data is stored on a (slow) HDD. Here you have a huge amout of I/O which can be highly reduced by caching the...
Does setting beresp.ttl to 0s replace previous cache?
Well, I've just did some tests and Varnish does not replace the object cached.
Building infinite-scroll that facilitates Varnish caching
php,ajax,apache,caching,varnish
We store in the session the last displayed item for each visitor You can pass this information as a query string in the url of the next page. Also try not to use POST for loading a next page, use GET requests....
Invalidate Varnish cache on multiple instances
amazon-ec2,magento-1.7,varnish,cache-invalidation
This is how I would do: Get managed nodes of the elb (describe-load-balancers) and pull the Instance IDs of those nodes Save above Instances IDs in an array Loop over the array of instance IDs and pull the Private Ip address of instances. Save these private IP addresses in another...
Speeding up AWS EC2 using MEAN
performance,amazon-web-services,amazon-ec2,varnish,mean-stack
I don't think you can get better/faster network for t1.micro w/ default settings, it has slow network speed. also, pick the nearest zone for you. you can comment this out, Gruntfile.js to disable livereload connect: { options: { port: 9000, hostname: '0.0.0.0', //livereload: 35729 <---- this ...
Varnish won't recognize req.grace variable
You are using Varnish 4.0.0, which needs updating from the 3.0 format your VCL code is based on. req.grace is gone (you usually don't need it) and vcl_fetch is now called vcl_backend_response. See the upgrade documentation: https://www.varnish-cache.org/docs/trunk/whats-new/upgrading.html...
Is varnish casting boolean to string?
The assignments you found are not to req.http - req.http.[name] is a way to access the request header [name]. Headers are strings, not booleans. You can still make this work with small changes, though: set req.http.x-is-static-resource = "true"; [...] if (req.http.x-is-static-resource) { [...] ...
WebClient doing something weird with large file
c#,amazon-s3,webclient,varnish
I came to the conclusion Varnish does some really weird things with its headers. I eventually setup OpenResty (nginx+lua) and used S3CMD to sync files whenever an URL is requested in a certain way, and used LUA to make a similar system to pre-signed URL's. This turned out to work...
Prevent Varnish from Caching Scheduled Gravity Forms
The easiest solution would be to just not cache the pages with forms at all. For example: sub vcl_recv { if( req.url ~ "^/(contact|order)" ) return (pass); } } sub vcl_fetch { if( req.url ~ "^/(contact|order)" ) return (hit_for_pass); } } Alternatively you could specify the Expires headers of the...
Can we have two varnish on two ports running on same system?
Yes you can. Not sure what you're doing, but you can either run two varnish processes, each on separate ports, or one varnish instance listening to two ports. Examples of each: varnishd -a 0.0.0.0:3000 -f /etc/varnish/default_1.vcl -i varnish_1 -n /var/lib/varnish/ubuntu1.dev/varnish_1 varnishd -a 0.0.0.0:3001 -f /etc/varnish/default_2.vcl -i varnish_2 -n /var/lib/varnish/ubuntu1.dev/varnish_2 The...
Does Varnish support Dependency Graph Cache Invalidation?
caching,graph,varnish,directed-acyclic-graphs,cache-invalidation
There's no support for exactly what you are asking for but as a workaround you can put tags in your headers as to what comments they are dependent on. For example sending a: x-depend-comments: 2578 2579 2580 And then at an update of a comment you can send a ban...
Varnish cache subdirectories using regex
You seem to be trying to make . match anything other than /, so it would make sense to define it that way: "(?Ui)^/cars/[^/]+/[^/]+/[^/]+/$" Otherwise, it matches anything (including /)....
trying 'PURGE' varnish using curb
Turns out it was the varnish backend, need to re-tool it to take bans rather than purges, need to get that working but ultimately my code is fine.
Websocket via Apache/Varnish failed
javascript,apache,websocket,varnish,ratchet
The problem was (as Marcel Dumont suggested) related to the fact that Varnish was not configured to listen on port 8081. So we redirected the frontend client to connect on port 80 and relied on Varnish to pipe the information on through to the underlying websocket on port 8081.
Can I use https with Varnish Cache
Varnish in itself does not support SSL and is very unlikely to do so in the overseeable future. To use SSL and still be able to cache with varnish you have to terminate the SSL before the request is sent to varnish. This can be done efficiently by for instance...
Docker, varnish, Connection reset by peer
There is a bug in the current image of the container related with Varnish VCL files no longer accepting environment variables in the backend config: https://github.com/jacksoncage/varnish-docker/issues/2 To solve it, get the original Dockerfile and associated files from https://github.com/jacksoncage/varnish-docker, apply the patch in https://github.com/jacksoncage/varnish-docker/pull/3/commits and rebuild the image with sudo docker...
When should same policies be added under both vcl_recv and vcl_fetch?
caching,reverse-proxy,varnish,varnish-vcl
I really cannot see why there should be any case where this is useful. You create hit-for-pass objects when the VCL has no idea that the resulting response cannot be caches. If the VCL can figure our that the response should not be cached you should just "pass" and be...
Varnish / nginx, some url's redirecting to :8080 in phpbb?
I also ran into this issue some time ago. I found the answer to this at: http://serverfault.com/questions/227742/prevent-port-change-on-redirect-in-nginx You can turn of the port forwarding for redirects in nginx by setting port_in_redirect off; ...
Varnish 4 Basic authentication
You can use the VMOD basicauth Install the Varnish VMOD First you need to install it. Download the source from the Git repo for basicauth. Extract into your homedir e.g. ~/vmod-basicauth/ You'll also need the Varnish source to build the VMOD. In Debian/Ubuntu type apt-get source varnish This will copy...
Using Varnish only as a Reverse Proxy without caching
if you want varnish to do nothing with the request at all you should use pipe. This prevens varnish from rewriting the headers. the response is send back from varnish direclty sub vcl_recv { return(pipe); } ...
What does this vcl_hash function do?
This checks to see if the user has a cookie named one of those (each | is the regex OR operator, so it can match any one of those). If there is a cookie with that name, then we hash the value of the cookie so that user gets their...
Pass the domain from nginx as frontend to varnish as backend
This is my solution, that worked for me. other answers will be welcome too! Just add proxy_set_header Host www.example.com; to location / { in nginx. Something like this: server { server_name example.com www.example.com; location / { proxy_pass http://127.0.0.1:8080; # THIS line was added: proxy_set_header Host www.example.com; } ... } ...
How to access to symfony Dev environnement behind varnish?
The line would return a 403 if either: HTTP_CLIENT_IP header is present HTTP_X_FORWARDED_FOR header is present $_SERVER['REMOTE_ADDR'] is not one of '127.0.0.1', 'fe80::1', '::1' Probably you are setting the HTTP_X_FORWARDED_FOR header in varnish, or varnish is setting it for you, depending on the varnish version. Unset it or rewrite the...
Is CMS caching needed while it runs on Varnish Cache?
wordpress,magento,caching,joomla,varnish
Yes , Of course that is needed varnish and other caching tools just cache the static part of your website but Joomla cache system is more powerful and doing the backed cache part of your website , for example some components force Joomla to dont cache their content as they...
.htaccess rewrite parameters not passing to target page
apache,.htaccess,mod-rewrite,centos,varnish
Most likely new server has MultiViews options enabled by default. Place this line on top of .htaccess to disable it: Options -MultiViews Option MultiViews is used by Apache's content negotiation module that runs before mod_rewrite and and makes Apache server match extensions of files. So /file can be in URL...
how do you do logging if your app is put in front of varnish
The easiest most efficient way to solve this is to create an ajax request that does just the logging part. That way you can still cache your whole page whereas you disable cache for the ajax request to enable it to log all users. The IP you would forward from...
Varnish 4 Cache does not cache dynamic page
I think Varnish by default does not cache pages with Cookies. Maybe that is your problem (it looks like you have a PHPSESSID and some other stuff)? See the Varnish documentation: https://www.varnish-cache.org/trac/wiki/VCLExampleCacheCookies Try configuring your webserver to not set any cookies, or configure Varnish to ignore them (note that that...
nginx isn't loading (include additional-hosts/*.conf;) wont change directory? centos7
wordpress,nginx,varnish,php-fpm,centos7
Before changes can affect you need to restart/reload your nginx, in CentOS it's done by running: /etc/init.d/nginx restart (If you are not root use sudo) You are requiring that all your included files will be suffixed with '.conf', please make sure your file has this extension. Last thing, you configured...
How do I access Varnish admin area?
Varnish doesn't have an admin area. The admin port is for the CLI varnishadm tool. It will normally pick up the port automatically. You can also use the admin port to connect to Varnish from custom tools and issue admin commands. Check out the docs for the varnishadm tool. Here's...
Why Varnish sess_timeout is so low by default?
sess_timeout is tuned to avoid keeping state around when it is not needed. Worker threads are (in high traffic situations) a precious resource, and having one waiting around doing nothing isn't productive. For all HTTP clients I know, manual netcat/telnet excluded, it does not take 5s to push through the...
HTTP Status Code 206: When should it be used?
facebook,http,http-headers,facebook-opengraph,varnish
It doesn't matter. Both replies are valid. (also note that the current specification is now http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p5-range-26.html, to be published as RFC soon)...
Magento Hole puch With Varnish
I have done this using Try this in local.xml inside the app/design/frontend/XXX/XXX/layout/local.xml file: <reference name="block name"> <action method="setEsiOptions"> <params> <access>private</access> <flush_events> <wishlist_item_save_after/> <wishlist_item_delete_after/> <sales_quote_save_after/> </flush_events> </params> </action> </reference>` OR <reference name="block name"> <action method="setEsiOptions"> <params>...
Varnish bypass a large file
apache,caching,varnish,varnish-vcl
This could be done with check of Content-Length in backend answer, and if it larger than some size, then tag it with some mark and restart request transaction Example, files with Content-Length >=10,000,00 should be piped: sub vcl_fetch { .. if ( beresp.http.Content-Length ~ "[0-9]{8,}" ) { set req.http.x-pipe-mark =...
ngx_pagespeed behind Varnish, how specify multiple (or correct) DownstreamCachePurgeLocationPrefix?
To send purge request back to correct varnish server. On Varnish side I put in vcl_recv: set req.http.X-Forwarded-From = server.ip; And then on Nginx I put: pagespeed DownstreamCachePurgeLocationPrefix http://$http_x_forwarded_from:6081; I thought this would work but it doesn't seem to be. I know the variable is getting populated with Varnish ip...
How do I make varnish cache subdomains as the same?
Just override vcl_hash to normalize the hostname: sub vcl_hash { hash_data(req.url); if (req.http.host == "api.example.com") { hash_data(req.http.host); } return (hash); } ...
Can't access phpMyAdmin after installing Varnish
Forgot that, at some point, I had bound httpd to the localhost by putting Listen 127.0.0.1:8080 in httpd.conf. Changing this to Listen 8080 meant that going to www.myserver:8080/phpmyadmin now worked.
Varnish C VRT variables/functions
This is going to be a pretty long answer, because there's a fair bit to say regarding your question. First, some nits about the C code in your VCL: Implementing strtolower is probably unnecessary; the standard vmod has a std.tolower function. If you are running Varnish 3, you should use...
How do I get the req.url in vcl_backend_response?
You have to use bereq.url now in vcl_backend_response.
Varnish how to save default.vcl config on restart
I would suggest editing your /etc/init.d/varnish as below stop_varnishd() { log_daemon_msg "Stopping $DESC" "$NAME" #save varnish config to default varnishadm vcl.show $(varnishadm vcl.list | awk '/^active/ {print $3}') > /etc/varnish/default.vcl ... Basically add a line to the stop function that first saves in-memory config to file so if you're restarting...
Varnish 4 Hit Miss Header?
Yes, I have: sub vcl_deliver { if (obj.hits > 0) { # Add debug header to see if it's a HIT/MISS and the number of hits, disable when not needed set resp.http.X-Cache = "HIT"; } else { set resp.http.X-Cache = "MISS"; } # Please note that obj.hits behaviour changed in...
How to get a summarized Varnishlog
logstash,varnish,kibana,kibana-4
You should take a look at this. Specially options -I and -i. Example with tags, shows RxStatus log entries only: varnishlog -i RxStatus Example with regex, shows both ReqStart and ReqEnd entries only: varnishlog -I "Req[Start|End]" ...
Varnish + Nginx redirect issue (redirects to :8080)
wordpress,redirect,nginx,wordpress-plugin,varnish
Such a simple solution..................... these are the moments I live for. For anyone else who has the same problem: port_in_redirect off; Put that in your nginx config in your server block. Presto, all redirects work now with varnish and nginx....