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Questions tagged [haproxy]

HAProxy is an open source, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for web sites crawling under very high loads while needing persistence or Layer7 processing.

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Ordering: 1. nginx 2. varnish 3. haproxy 4. webserver?

I've seen people recommend combining all of these in a flow, but they seem to have lots of overlapping features so I'd like to dig in to why you might want to pass through 3 different programs before hitting your actual web server. nginx: ssl:…
Joel K
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HAProxy graceful reload with zero packet loss

I'm running an HAProxy load balancing server to balance load to multiple Apache servers. I need to reload HAProxy at any given time in order to change the load balancing algorithm. This all works fine, except for the fact that I have to reload the…
Conor Taylor
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How can I remove balanced node from haproxy via command line?

I have haproxy running as my load-balancer and from the stats web interface that comes with haproxy, I can put a web server into maintenance mode (and bring it back out again) - which is great! However, I also want to be able to perform that same…
isNaN1247
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Configure multiple SSL certificates in Haproxy

My haproxy instance serves 2 domains (mostly to avoid XSS on the main site). The rules look something like this bind :443 ssl crt /etc/ssl/haproxy.pem acl is_static hdr_end(Host) -i example.com acl is_api hdr_end(Host) -i api.example.com acl…
user22711
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4 answers

How to set up stats for HAProxy?

I can't figure out how to set up stats for HAProxy. This is my configuration: global log 127.0.0.1 local0 log 127.0.0.1 local1 notice daemon #debug user haproxy group haproxy maxconn 4096 stats socket…
Jan Deinhard
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By what criteria do you tune timeouts in HA Proxy config?

When configuring HA Proxy, how do you decide what values to assign to the timeouts? I've read a half dozen samples in various blogs, and everyone uses different timeouts and no one discusses why. HAProxy seems specifically worried about client,…
Jeremy Wadhams
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Do HTTP reverse proxies typically enable HTTP Keep-Alive on the client side of the proxied connection and not on the server side?

HAProxy has the ability to enable HTTP keep-alive on the client side (client <-> HAProxy) but disable it on the server side (HAProxy <-> server). Some of our clients connect to our web service via satellite so the latency is ~600ms and I think that…
LostInComputer
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What are the Differences between HAProxy and Ngnix in reverse proxy mode?

What are the differences between HAProxy and Nginx when it comes to their abilities as a reverse proxy?
Quintin Par
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How to keep haproxy log messages out of /var/log/syslog

I set up haproxy logging via rsyslogd using the tips from this article, and everything seems to be working fine. The log files get the log messages. However, every log message from haproxy also shows up at /var/log/syslog. This means that once the…
itsadok
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HAProxy reqrep remove URI on backend request

real quick question regarding HAProxy reqrep. I am trying to rewrite/replace the request that gets sent to the backend. I have the following example domain and URIs, both sharing the same domain name, but different backend web server…
Jim
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Possible to add basic HTTP access authentication via HAProxy?

I've successfully setup HAProxy in front of an HTTP server which I have no control over. Is it possible to configure HAProxy to add Simple HTTP Authentication to all sites, bearing in mind I can't configure this on the backend? Thanks, Lars
Lars Schneider
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How can I deploy a scalable, reliable haproxy cluster on Amazon EC2?

We need some more advanced functionality than ELB provides (mostly L7 inspection), but it's not obvious how to handle things like heartbeat and high availability with something like haproxy using EC2. There's a high likelihood we'd need 3 or more…
Don MacAskill
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How to Read the haproxy Stats Page

For those of you using HAProxy along with the stats papge (haproxy?stats), how do I interpret this page? There is no decent explanation. For instance: Which Session column displays the number of currently active connections to the backend? Session…
w00t
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LVS vs HAProxy, which should I choose?

I am looking for a solution to load balancing and failover strategy, mainly for big web applications. We have many services to be balanced, such as web, MySQL, and many other HTTP or TCP based services. But I am not sure what their pros and cons…
Mickey Shine
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HAProxy to terminate SSL also send SSL to backend server

I would like terminate SSL at HAProxy, do some manipulation on the header, rewrite URL and re-encrypt traffic and send to backend servers as SSL? I can't seem to find a way to do this. I can get regular SSL termination done, and send plain HTTP…
oazabir
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