Load balancing deal with the techniques involved on using multiple systems to deal with high demands, balancing the load between those multiple systems. Questions deal with networking and server load balancing, using dedicated hardware or not.

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Appending URL subdomain as URL path in HAProxy

I want to convert following URL: http://subdomain.example.com/a/b/c To this: http://example.com/subdomain/a/b/c In HAProxy. Thanks a lot
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11 views

Configuration for a cheap Video On Demand System? [duplicate]

I am looking for a cheap Video On Demand (VOD) solution, which has capactiy for 20TB of videos (1500kbps bitrate) and 2000 concurrent users. My current configuration is now for 4 TB video files and ...
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60 views

Odd Nginx issue displaying latest version of site

We're running Nginx 1.6.2 and setup as a load balancer (using proxy) along with our backend servers. Noticed the other day, when I make updates on backend servers the changes are NOT visible to web ...
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1answer
69 views

Is it possible to make nginx load balance application and cache servers in “parallel”?

I just read this Digital Ocean article and was wondering if the topology in the final example can be implemented with nginx. I'm interested in how the load balancer handles the two dedicated cache ...
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1answer
88 views

Configure nginx load balancer to better handle upstream 500 errors?

I have a cluster load balanced using nginx with 3 backend HTTP servers defined as the upstream servers. How can I configure nginx to failover to the next HTTP server in the cluster if one of the HTTP ...
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511 views

504 Gateway Timeout on HTTPS but not HTTP

I configured an AWS Load Balancer. It is working find on HTTP, but when I try over HTTPS I get a 504 Gateway Timeout Error. I tried all the suggestions on AWS's help page (increase idle timeout), but ...
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1answer
274 views

Can I use HAProxy to load balance telnet connections?

We use HAProxy as load balancer for regular HTTP requests. I see no reference to telnet connections in the HAProxy configuration guide: HAProxy config guide. I was hoping to reuse HAProxy (or spin up ...
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1answer
30 views

Are There any Web-Based Load-Balancing Managers? [closed]

I've setup load-balancing and clustering on a few linux systems for serving web and database content, and each time it's a fairly laborious process. So I'm wondering, are there any web-based managers,...
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2answers
45 views

Industry standard SLA for API Gateway static IP change notification?

Assume a "public" API Gateway having a single domain name (ex. api.mybigcompany.com) and a set of 8 static IP addresses assigned to an "East" hosting facility to load balance that domain. A subset of ...
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94 views

Apache JSESSIONID thinks it gets a new sessionid every url request

I am running a web app using tomcat and have Apache 2.4 set up as a reverse proxy that load balances my requests. However I am having some trouble configuring the stickysessions. My proxy balancer is ...
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1answer
247 views

Haproxy balance source hash-type consistent only routing to single backend

Folks, I have a vm setup with nginx and haproxy to act as a load balancer for a webapp that needs to maintain session stickyness to a single backend once a client has made a connection. The nginx ...
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1answer
39 views

Designing EC2 for regional load balancing and single DB

I've built EC2 hosting solutions before, but the application I'm building now is more advanced and I'd like some insight to see if I'm on the right track. The system is hosting a mobile application ...
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2answers
103 views

What are the directories and files that I should keep in sync for a cluster server

I am currently wanting to set up new clusters. Each cluster is defined by its software installed, software settings, and its home folder files. I want only the above to be cloned and not things like:...
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1answer
68 views

Migrating from nginx to Amazon ELB

I'm interested in migrating from a manually managed AWS EC2 cloud with multiple webapps to AWS ELB with auto scalling. However, I'm not sure whether a single ELB will be enough to handle my ...
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1answer
45 views

Multiple webservers using PHP files stored on only one server?

Is it possible to have multiple webserver nodes that are balanced by a load balancer use PHP files stored elsewhere on the local network? Right now, I have two nodes and static content (uploads, file ...
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2answers
86 views

Creating a redundant environment with ONLY 2 servers (so without a third server that handles the load-balancing) [duplicate]

First of all, i'm sorry if this question has been answered before, but i've been searching for a while now and couldn't seem to find (or understand) an answer. So, i have two physical servers with ...
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1answer
67 views

Nginx load balancer shows wrong site on failover server

I have five websites and I have three servers, all running nginx. Primary server Load balancer Failover server Each website has it's own primary server but they all share the same failover server....
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61 views

Could HAProxy disable the Apache Instance on the same node it is running?

I have a setup with three VMs that are running on a core i74xx. The machines form a LAMP cluster with HAProxy doing the loadbalancing. After running multiple load tests I found out, that throughput ...
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57 views

Server becomes unresponsive while under load

We have a server setup containing 2 webservers, a RDS MySQL cluster and a loadbalancer, on AWS. The webservers are running PHP and Nginx, and contains multiple services each. We have a service ...
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3answers
2k views

How do big companies like Youtube load balances traffic with only one IP [duplicate]

Examining the A records for youtube.com (for example), I see only one IP address. How can this be possible, given the volume of traffic they handle? Do they use anycast with load balancers behind it?...
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1answer
2k views

HAProxy “option redispatch” not working when I put into maintenance mode

I'm having an issue with HAProxy not redispatching connections to servers. When I put a server into maintenance mode none of the active connections are being disconnected/transferred to other active ...
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2answers
268 views

HAProxy - Health check of multiple microservices for one server

We have 2 web servers that we want to load balance. Each server has a main web application that is hit by the public. Each server also has number of dependent microservices that are used internally by ...
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2answers
227 views

HAProxy mysql configuration

I tried few times, but I cannot figure it out why my mariadb load balancer with haproxy is not working. I have : 1 HAProxy (CentOS) : 10.181.102.249 1 Master (CentOS) : 10.183.241.150 2 Slaves (...
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1answer
129 views

when to use NFS for web app

I am currently building a simple webapp architecture on AWS, as follow: Elastic Load Balancer - multiple front ends - RDS database. I have also set up an NFS server to store all images uploaded by ...
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2answers
155 views

IIS Load Balance with 2 servers

I have two servers that I would like to use to load balance an application. Ideally, but not a requirement, I could load balance based on URL. But based on my research, that is not something that is ...
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1answer
119 views

Nginx Load Balance / Proxy to Upstream with Path / Rewrite

Basically I have a API farm as 192.168.1.1, 192.168.1.2, 192.168.1.3 However the endpoints have different folder structure (3rd parties which i can't amend!) So basically I want to have a nginx ...
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0answers
159 views

Loadbalancing and HA with SolrCloud?

I have a LAMP Application running with solr 3.x on one server for several years now. Now I am migrating due to heavy load to a setup with two dedicated machines where all services are loadbalanced via ...
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1answer
574 views

HaProxy giving - 503 Service Unavailable

I am using below configuring for performing loadbalancing for two Tomcat servers. And I configured HAProxy to perform SSL/TLS bridging/re-encryption. #------------------------------------------------...
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1answer
68 views

HA Proxy should continue with backup till all sessions are alive when main server up

I have two servers say MainServer and BackupServer. From this MainServer is main server and BackupServer is my backup sever which I have configured with HA Proxy. Here is my HA configuration server ...
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1answer
225 views

Can apache proxy/load balancer redirect requests to other available balancer member when it gets timeout from a hanging server?

I am using apache2.4.6 and tomcat8 to implement a load balance solution. I'd like to know whether apache balancer will redirect requests to another balancer member if it gets timeout error from one ...
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1answer
166 views

Why hostname got truncated from the HAProxy syslog messages

This is a slice from my haproxy logging, where I target the sysloga and remotely log to papertrail, using the log-send-hostname option to pront the hostname in the log message instead of the localhost:...
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3answers
117 views

load balance across several SSDs in a server

I would like to have a volume spanning several SSDs or HDDs in my server. When I write a file to this volume, the file is written in whole to one of those drives chosen randomly or in round robin ...
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1answer
423 views

Nginx load balancer returns bad gateway error

I have three servers; two web servers running nginx and a load balancer also running nginx. I can ping/telnet/curl between the load balancer and web servers but when I try to go to the load balancer ...
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948 views

Transparent Proxy Issues w/ HAProxy Centos 7

Having issues following steps to transparent proxy outlined here: Howto transparent proxying and binding with HAProxy and ALOHA Load-Balancer | HAProxy Technologies – Aloha Load Balancer Believe to ...
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1answer
95 views

Load Balance Virtual Host and Amazon/DO Server using HAProxy

I am stuck with an issue and im hoping someone can point me in the right direction. I have a server that hosts multiple sites using Apache Virtual hosts (shared IP's). A few months ago my server ...
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56 views

Sonicwall NSA240 - Route all traffic from one WAN connection direct to VLAN

We are wanting to setup a Sonicwall NSA 240 as a PPPoE 'gateway' for several internet connections, each of these internet connections need to be put onto a separate VLAN. This will then be sent via ...
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1answer
293 views

How do load balance servers handle all the traffic? [closed]

I'm trying to understand how load balancing works. I have read the basics however I don't understand how a load balancer doesn't go down because of all the traffic. Lets say I have 1 load balance ...
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37 views

Apache and long runnig servlets

I have an webapp deployed on 4 jboss instances and there is an apache 2.2.15 (mod_proxy, libs: DAV/2 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_jk/1.2.31) webserver doing the load balancing. The ...
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1answer
23 views

ldirectord balancing internal traffic doesnt work

Here is my ldirectord.cf file checktimeout=10 checkinterval=2 autoreload=no logfile="local0" quiescent=yes virtual=192.168.1.4:7777 real=192.168.1.52:7777 gate scheduler=wlc ...
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2answers
98 views

SSL Cert for one domain and multiple IPs

I have a question about SSL certs and multiple servers. Question: I have one cert, one domain name and I have many servers that hold my website code. Example.com can point to IPs 192.168.1.1, 192....
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44 views

local port forwarding with failover

There is a number of similar though not identical processes (worker processes) running on the localhost and listening each on its own TCP port, let's say process1 is listening on port 10001 process2 ...
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2answers
80 views

unison or Rsync for session files

In my cheap config I am using 2x app servers and 1x DB server. My question now is what I should use in order to sync session files between the servers for my php app? Is unison or Rsync good here, ...
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1answer
142 views

Two network adapters for a machine to double the transfer speed [closed]

i am new to this. In my scenario, i have a desktop pc running windows 7 and planning to set up a local web server using xampp for big file transfer in the lab. The problem is that,there are 80 ...
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2answers
191 views

Elastic Load Balancer awseb-e-g has zero healthy instances

I have an Elastic Beanstalk (EB) set up with a running application on a PHP/Apache server. The application was running OK since many hours ago when the EB's health got subtly RED and I don't know why. ...
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1answer
135 views

Nginx multi website multi public ip

I have deployed platform with archetecture where I have nginx lb server hash, behind is app server that has 4 apps. nginx lb server has configurations such as: upstream example1.com { ip_hash; ...
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15 views

On a low-level, what is happening when a database server with no connection limit gets “overloaded”?

I'm making my first foray into scaling web architecture, and I was trying to find some more technical literature on what exactly happens that causes a database server to crash. Theoretically, it ...
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29 views

Load Balancer Loop Through

I have a Cisco ASA which is currently load balancing a number of web applications. We are preparing to bring a new application online that is an API that is going to be referenced by one or more of ...
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84 views

can AWS load balancer auto restart out of service images?

I have set up a load balancer with two instances in two availability zone I set up an health check to ping a specific page of my webapp now I'm trying to find if the load balancer health check could ...
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2answers
39 views

ipvsadm: Access loadbalanced ip's from internal network

I have the following scenario: ipvs-Loadbalancer - direct routing: 123.123.123.117 Realserver 1: eth0: 123.123.123.123 eth1: 10.10.0.1 Realserver 2: eth0: 123.123.123.124 eth1: 10.10.0.2 Random ...
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1answer
316 views

ELB health checks for freshly launched EC2 instances not working

I'm trying to manually set up a load balanced environment using EC2. My instances are reachable via SSH and ping. However, as soon as I put them inside a load balancer, the instances are not able to ...