HAProxy is a 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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38 views

haproxy : Checking for a single header

My server is distributing websocket client connections over 4 local websocket servers. Is it possible to instruct haProxy to accept only WebSocket version 13 (RFC 6455) ? i.e. Verify if ...
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1answer
110 views

HAProxy - proxy to webserver via tcp

I have a simple web application, All requests to that application are HTTP based (RESTfull API and standard ajax) I have an haproxy before my tomcat cluster. So now i have clients that http request ...
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1answer
2k views

Dynamic HAProxy configuration

I try to figure out a way to dynamically manage the loadbalancer configuration. I want to add and remove "service nodes" depending on the overall system load. My research so far revealed "Thalassa" ...
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86 views

How to send data via UDP to indexer (Elasticsearch) when haproxy is responsing?

I have some web backends balanced via haproxy. Every backend sends some specific json data in response headers (example of header with data X-JSON-Data: {country:"US", os:"Android"}). This is not ...
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2answers
1k views

HAProxy/Keepalived vrrp set up in AWS EC2 with EIP (Basic EC2)

I am a newbie to CentOS/Linux/HAProxy/Keepalived, so I have had a lot to learn over the past few days! I have 2 CentOS 6.5 servers in Amazon AWS running on their own EC2 Micro instances. I also have ...
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1answer
8k views

How to block IP addresses in HAProxy?

Is there something like Apache "deny from ip" in haproxy?
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1answer
273 views

Can HAProxy reconnect a websocket to another backend server transparently?

I'm new to HAProxy so this might have an obvious answer but I wasn't able to find it. Consider this setup: two backend web applications; one HAProxy in front of the web applications; many clients ...
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1answer
445 views

HAProxy set acl with hosts from file

I'd like to migrate some 100+ sites from one server to another. Current plan is to gradually add an acl for each as they are moved to direct traffic to a new server. Here is a simplified example ...
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1answer
126 views

Restarting HAProxy with -st flag returns error

I'm restarting HAproxy (on Ubuntu Server x64 14.04) with the following command haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -st $(cat /var/run/haproxy.pid) However, when actually ...
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1answer
3k views

Lot of FIN_WAIT2, CLOSE_WAIT , LAST_ACK and TIME_WAIT in Haproxy

We are running haproxy in production for around 10k+ concurrent users. But we are seeing lot of FIN_WAIT2, CLOSE_WAIT , LAST_ACK and TIME_WAIT in the netstat output. This output is on a 8G ...
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0answers
46 views

is it possible to have reqrep for each server in haproxy loadbalancer?

There are 3 servers in a load balanced HAProxy setup. server serv1 192.168.1.101:8080 check inter 2000 rise 1 fall 1 server serv2 192.168.1.102:8080 check inter 2000 rise 1 fall 1 #The ...
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1answer
79 views

HAProxy is swapping (Major Faults) when Serving Web Sockets

I've observed some swapping in our HAProxy instance that serves web sockets. The fault rate is low (0.01 major faults/s) currently. We use nbproc mode with one process for the http processing, and 3 ...
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1answer
63 views

Can haproxy use umlaut-domains?

I am hosting several webpages on one server. For Routing, I am using haproxy. Now, one funny user wants an umlaut-domain "supportbär.de". #haproxy.cfg frontend http-in .. acl is_supportbaer ...
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1answer
4k views

haproxy with multiple IP in one server

I use haproxy to loadbalancer multiple virtual machines (web services). Each virtual machine has multiple IP addresses. What is best practice to setup this on haproxy? Right now my configuration are ...
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0answers
17 views

Session automatically unset into HAProxy Server

Its very critical issue. I set session using following code . session_start(); $_SESSION['price'] = 100; After one minute, session automatically destroy or unset. Its happen single time in each ...
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2answers
290 views

HAproxy current session is zero

I have some problems on sticky sessions with HAproxy. Haproxy counts every request as a new session. I have a Java servlet that creates the cookie JSESSIONID. If I refresh that page 5 times. The ...
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0answers
33 views

How to specify alternate errorfiles for a given backend?

We currently use errorfiles to send various 40x/59x error messages to the client on encountering errors. Currently these errorfiles are in html format but I'd like to switch them based on a format ...
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1answer
761 views

Haproxy sticky session not redirecting to different server when backend fails

I have the following configuration for my haproxy LB: global daemon maxconn 2048 # SSL ca-base /etc/ssl/certs crt-base /etc/ssl/private ssl-default-bind-ciphers ...
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148 views

Haproxy load balancing TPS lower than single node

I have 2 apache2 servers running in the back end and have a haproxy between them and the clients. If I bench tested anyone of these apache2 severs with ab i get north of a 1500TPS however when I bench ...
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2answers
2k views

HAProxy HTTP vs TCP

HAProxy gives you the option to set the mode to TCP or HTTP. It also allows you to set the port. So why allow me to choose between HTTP and TCP, if it's letting me choose the port too? Surely if I ...
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1answer
155 views

How to Add/Remove New Server behind Haproxy with Minimal Disruption

Haproxy is currently balancing the load between 2 servers, A an B. Clients are connecting to these servers via persistent TCP connections. Question: We want to upgrade from server A to a more ...
28
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3answers
18k views

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! ...
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165 views

LVS + HA Proxy for L4 to L7 load balancing

Currently we are using HA proxy for our load balancing needs. We are planning to integrate LVS with HA proxy to create a load balancing solution that can take care of L4 to L7 load balancing and HA. ...
2
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2answers
2k views

HAProxy stops accepting connections

I've been using HAProxy to loadbalance my appservers for many months without problems. Recently some traffic spikes have lead me to setting the maxconn parameter to rate-limit connections to my ...
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1answer
6k views

How can I make haproxy route requests based on URL substrings?

A load balancer is set up with two back ends. The request URI will look like the following: http://example.com/answers/submit http://example.com/tag-02/answers/submit How can I configure haproxy ...
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2answers
5k views

HAProxy with SSL and sticky sessions

We're trying to set up HAProxy (v1.5.1) to use SSL. While we managed to do that, we're having some issues with the round robin settings: We do want to have stick sessions, but haproxy seems to send ...
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0answers
94 views

haproxy: explicitly setting the gpc0 value within a frontend or backend section

I have something like this in my haproxy config backend myservice option httplog stick-table type string size 10 expire 10m store gpc0 stick store-request req.hdr(MYHDR) server ...
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2answers
214 views

How to get name of server that has served request in fronted section?

I need to add server name in response HTTP headers X-Servedby. Is there any way to replace [server] with name of server that has served request? frontend front x.x.x.x:80 default_backend balancing ...
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3answers
998 views

HAProxy - HTTP Server error detection

I want to use HAProxy for load balancing and failover of an Apache-PHP application hosted on many identical backend servers. Is there any way of detecting a failed node on HAproxy and removing it from ...
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2answers
167 views

Resolving HAProxy BADREQs using socat

I'm trying to figure out why i'm getting BADREQs from time to time, by using "show errors" in socat. The problem is that it only shows the last error. I want to be able to see all of them ( like using ...
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1answer
223 views

Https on HAproxy 1.4 using stunnel

I'm running a load balancing server with HAproxy and implementing Https using stunnel on the same machine, on the actual webpages end i've got 2 diferent webs, A and B, with similar behaviour. Here ...
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1answer
206 views

Haproxy hdr_ip acl unaffected by reqidel?

I have an server that sits behind a load balancer, but for the time being can also be accessed directly. I have a white list of IP addresses that should be able to access it. Given the following ...
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1answer
100 views

HAProxy's Flooding MySQL Connections

I have a setup of 2 HAProxy servers using the KeepAlived process for failover, and each HAProxy is configured to load balance mysql connections to my MariaDB Galera cluster of 3 nodes. I'm trying to ...
2
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1answer
745 views

Why do Layer 7 load balancers configuration not require any client configuration changes?

For example, for haproxy (layer 7) load balancing, you only need to configure the "real servers" or "backends" behind the VIP (i.e., cluster IP). E.g.: listen smtp 192.168.3.10:25 mode tcp ...
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0answers
150 views

URL configuration with no port in haproxy

I need to configure a url into HAProxy for load balancing. the URL is like http://x.x.x.x/zabbix/ How do I configure this URL without port no. I have addd like below in /etc/haproxy/haproxy.cfg file. ...
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1answer
450 views

haproxy forward uri to root of another server

I use a HAPROXY container as an entry point for a virtual HPC cluster. Depending on a prefix the request is forwarded to different containers. :80/foswiki/ -> :80/foswiki/ :80/kibana/ -> :80/kibana/ ...
0
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1answer
73 views

Tomcat cluster - how to verify node starvation?

We have a tomcat cluster with a load balancer (haproxy). As part of our upgrade script we would like to starve a single tomcat in the cluster of 3, wait until all the requests are handled for that ...
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3answers
429 views

HAProxy Only Sending Traffic To One Node

I have an HAProxy with IP 10.60.61.20 and three MariaDB nodes at IP .21, .22, .23, all of course in the same subnet. I have the MariaDB cluster sync'd and they can read/write to eachother, but when I ...
2
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1answer
151 views

Exclude particular IP address from Postfix log

I have a postfix relay system that uses HAProxy to check to make sure Postfix is responding as it should. There is a front-end load balancer which connects using an internal IP to the backend servers. ...
4
votes
2answers
5k views

haproxy multihost with ssl acl

how can I use ACL rules in haproxy (1.5dev19) for server multiple hosts with own ssl certificate for each?? I have 3 backends with multiple domains all on one IP address. nodejs (http/https/ws/wss) ...
2
votes
1answer
479 views

Haproxy needs restart every 2 hours

I have set up two dedicated haproxy servers to spread the load on three application servers. I have set up regular http 80 balancing, and also a special to work with websockets. It works great for ...
3
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2answers
621 views

When a server IP changes, do exising TCP (e.g. http/mysql) connections remain running

We have some PHP-FPM servers and when they need a database connection, they connect to an HAProxy server which selects them a database server to use and the connection opens. When we then want to ...
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1answer
1k views

Direct several subdomains to a single backend with haproxy

I'm using haproxy to direct route for several applications running on a single server. For one of the domains in use there are several dozens of subdomains that should be directed to one of a few ...
5
votes
1answer
4k views

How to add custom header containing the absolute address of the originally requested resource

I have the following setup: |-------|--- backend1:8080 example.com:80---|HAProxy|--- backend2:8080 |-------|--- backend3:8080 I would like to configure the HAProxy ...
2
votes
1answer
476 views

HAProxy max out at ~10,700 connections

I am stress testing ejabberd with Tsung. My EC2 instances setup as follows: Tsung : c3.xlarge ejabberd : c3.2xlarge HAProxy : t1.mirco When I let Tsung talk to the ejabberd instance directly, I ...
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1answer
199 views

HAProxy SSL Responses Very Slow

Even though CPU usage is low, and http responses are very quick, SSL responses are taking longer than 10+ seconds to respond.
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1answer
114 views

configure haproxy to detect failed webservers

I have two webservers: WEB A: 192.168.0.3 WEB B: 192.168.0.4 and am using haproxy to load balance between them. How do I configure haproxy to detect when WEB A or WEB B dies and stop forwarding ...
1
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1answer
71 views

Replicate data across loadbalanced apache nodes

I am using haproxy that is pointing on 5 apache nodes, the problem is that I want to replicate apache data between those nodes. I have installed DRBD and it worked but on 2 nodes only The rsync is not ...
2
votes
1answer
746 views

Rotate haproxy logs

I tried few things but still not able to rotate haproxy logs efficiently. I need to rotate logs when log files crosses 500 MB size. Considering haproxy is serving large no. of static tcp connections, ...
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0answers
233 views

Horizontal Versus Verticale Scaling for Large Scale RoR Application (High CPU and Memory Usage)

We are launching a high demand (several hundred simultaneous users) Ruby on Rails application and we are trying to determine the best way to scale. Currently, we have a setup that follows this ...