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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15
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2answers
1k views

How is a single IP address load balanced?

I'm aware of "round robin DNS" load balancing, but how can a single IP address be load balanced? Google's DNS servers for example, 8.8.8.8 and 8.8.4.4. Wikipedia's load balancing article states: ...
1
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1answer
16 views

Default backend in haproxy

I wonder whether there is a way to configure a default backend in haproxy, so it balances requests among a pool of backend servers (three in the example below), keeping the default backend as a ...
11
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4answers
11k views

How do I Install Intermediate Certificates (in AWS)?

I have installed private key (pem encoded) and public key certificate (pem encoded) on Amazon Load Balancer. However, when I check the SSL with site test tool, I get the following error: Error ...
0
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0answers
10 views

Load Balancer for web site hosted on Apache server - Linux [duplicate]

I am hosting a website on Apache2 server in Linux (Ubantu 14.01), its a PHP website. I need too create access point for around 5000 concurrent users. Can anybody help me with the Hardware which i ...
0
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1answer
67 views

How to AVOID getting caught in a DDOS meant for someone else (not prevent)?

So we have a load balancer and all that jazz set up with Rackspace. However, guess what, our clients' websites were down again today. It seems that Rackspace should have their load-balancer ...
1
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2answers
2k views

Pfsense: Inbound Load Balancing https with sticky connection

first of all I'm very sorry for my English... This is my scenario: Internet Firewall+LB: pfsense_1(Active) + pfsense_2(Passive) in CARP Pool servers: 3 x nginx(PHP5+HTTP+HTTPS) Pfsense 1 and 2 ...
0
votes
1answer
981 views

Load balancing using Httpd mod_cluster and tomcat not working

I am trying to setup a load balancer using Httpd, mod_cluster and Tomcat. My Httpd is running on the same server with IP 192.168.9.73 where the tomcat is running. Here is my Httpd configuration- ...
1
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4answers
5k views

What is the recommended GlusterFS configuration for a growing website?

I have a website that is tracking towards 50 million hits per day average, and within the next 3 months should be over 100 million hits per day. We are trying to use GlusterFS v 3.0.0 (with latest ...
1
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1answer
2k views
0
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2answers
338 views

Which are the requirements of datacenter network for Network Load Balancing to work?

I have two rented dedicated servers and I would like to put them on load balanced cluster configured on Windows 2008 Network Load Balancing. Since the servers where purchased on different times, they ...
0
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2answers
273 views

Network Load Balancing Servers cannot communicate with each other

With Windows 2003, if I try to ping one Loadbalanced server with the other it is getting a request time out. Is this how it should be? However, from a client - we are able to ping each load balancing ...
9
votes
3answers
23k views

What is the downside to sticky sessions with load balancers?

We have a web farm of IIS7 machines which work great. In front of them is an F5 Big-IP hardware load balancer, also working fine :) Currently we're using an ASP.NET State Service to handle our ...
0
votes
1answer
947 views

Zen Load Balancer HTTPS to HTTPS

I've been struggling with an issue that I am hoping someone can help with. Basically, I have setup a working Zen Load Balancer going from HTTPS to HTTP but I am struggling with getting it to work ...
0
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0answers
7 views

Web-Application scalability topology in different geographical locations [closed]

I am trying to make an always-on scalable application in two different locations. I have four components I understand that I need: DNS, Load balancing, Database, and the Web server. Database: For ...
5
votes
1answer
99 views

Load balancing network traffic using iptables

I am trying to load balance traffic from internal LAN on a linux router having two gateways. Initially I went for the iproute implementation which didnt balance the load as expected, reason being that ...
-1
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0answers
23 views

Create a 2 ISP failover config on Ubuntu or FreeBSD

I have 1 Ubuntu Box and 2 ISP providers. Also I have a 1 LAN: # WAN1 (100Mbps): ip: 5.5.5.5 netmask: 255.255.255.252 gateway: 5.5.5.1 #WAN2 (20Mbps): ip: 4.4.4.4 netmask: 255.255.255.0 gateway: ...
3
votes
4answers
2k views

Need help troubleshooting intermittant TCP timeout in HAProxy

I have an application where the client connects to a server via a simple TCP based protocol over TLS/SSL. In development, this has worked great for many months while we were building our application ...
0
votes
1answer
31 views

EC2 Failing Load Balancer Health Check

One of my projects is an internal web app which we are putting behind a load balancer. As of now there is only one ec2 (will be more in production) and the load balancer is not able to reach the ec2. ...
2
votes
0answers
38 views

how to prevent loadbalancer from going offline?

i plan to setup a load balancer for a webproject but there is a major issue in my head: a typical loadbalancer would be: (provided by nginx upstream) Server #1 accepts all requests and forwards them ...
2
votes
1answer
271 views

nginx wrong IP when checking connections limit

I have lot of times the following line appearing in the nginx error log. This is causing the 50x error appearing to the visitors of the site. We have a multilanguage site that has URL ...
0
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0answers
20 views

DNS UDP Load Balancer - Is there X-forward-for like options? [duplicate]

We're using the Rackspace's UDP load balancer - however its only giving us internal 10.x.x.x addresses from our clients, and not the actual "external" of the external connection. On an HTTP Server I ...
1
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2answers
127 views

Geographic load balancing

At a company they currently have a typical webserver setup: one webserver and one database server. Unfortunately there are often problems due to high load on the webserver and database so I was asked ...
1
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1answer
864 views

403 forbidden error going through aws load balancer

I am running a IIS 7 Server behind an aws load balancer. I am using a Verisign SSL certificate which is installed properly but whenever I put in the URL, or the DNS name of the load balancer I get a ...
-1
votes
0answers
7 views

How to configure database loadbalacer and fail over with master slave configuration

I have a web application written in java with Mysql database. I want to ensure high availability of my database server, hence i have configured master-slave replication mode. All my reads goes to ...
0
votes
1answer
2k views

Simple setup for load-balanced and fail-over tomcat?

Being new to Tomcat infrastructure, I am wondering what an advisable setup would be to have two physical machines each running a tomcat instance to be load-balanced and capable of failover to each ...
0
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0answers
10 views

Simple way to test my load balancer from behind (inside) its LAN

I have a 3 DSL load balancer with, say, 1MB/seg download speed. In order to check its correct behavior from any of the computers connected to this load balancer and see if traffic (download, at least) ...
1
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2answers
2k views

HAProxy configuration for RabbitMQ

I have an API that sends messages to RabbitMQ. I have a high availability RabbitMQ cluster behind HAProxy. When I load test my API I start seeing lots of this: Recovering from a network failure... ...
1
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3answers
2k views

Ubuntu Pound Reverse Proxy Load Balancing Based off active server load?

I have Pound installed on a loadbalancer. It seems to work okay, except that it randomly assigns the backend server to forward the request to. I've put 1 backend machine under so much load that it ...
1
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2answers
1k views

Apache & Tomcat Load balancing via Mod_jk issue

I hope this finds you all in the best of your health and spirits. I have an issue with a new setup where I currently have 1 APACHE 2.2.15 & Tomcat 6.0.14 on RHEL. Mod_JK version 1.2.30. Ill add ...
1
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1answer
57 views

How would you set up multiple SSL terminating Haproxy instances, which are themselves load balanced?

I've been doing a great deal of research and experimentation on this, and I'm really running into a wall: I'm trying to set up HAProxy as the reverse proxy for a high-availability environment. All ...
0
votes
1answer
14 views

What is the request flow in BIG-IP load balancers for NONE preference?

I would like to know to which member does the request will be first directed to when NONE preference is set in the BIG-IP load balancers. From this link, there are three ways to set the redundancy ...
1
vote
1answer
2k views

ISC DHCP fails to sync leases between peers

I use ISC DHCP version 4.1.1 on Debian GNU/Linux on both servers. I tried to solve the following problem using various versions of ISC DHCP but it remained the same. My configuration for failover ...
0
votes
1answer
34 views

Load balancing iptables

I am trying to use iptable for load balancing. I'm working with virtualbox. All vm (debian)are in internal networking and IPs are static. I want to route requests coming to my web server(apache2) with ...
1
vote
3answers
5k views

Cannot start up haproxy

Using ubuntu as my server I'm trying to set up load balancing using HAProxy. When I try to run using "haproxy -f haproxy.cfg" i get this error. [WARNING] 035/115820 (1148) : [haproxy.main()] ...
0
votes
2answers
885 views

Using cloudflare as the only load balancer

Say I have 3 vps nodes in linode to serve traffic on a single website. Linode themselves provides a node balancing solution: https://www.linode.com/nodebalancers But I use cloudflare and was ...
0
votes
2answers
961 views

HAProxy + Percona XtraDB Cluster

I am attempting to setup HAproxy in conjunction with Percona XtraDB Cluster on a series of 3 EC2 instances. I have found a few tutorials online dealing with this specific issue, but I am a bit stuck. ...
1
vote
1answer
22 views

Azure Traffic Manager TTL - what does it mean for downtime

The default TTL on Azure Traffic Manager is 5 minutes by default. Does this mean that when a server (endpoint) goes down then people won't get routed to a working server for up to 5 mins?
1
vote
1answer
2k views

301 redirect Rule For Load Balance F5 BigIp

I have a load balancer F5 Big ip for my website. Currently, I am having 302 redirect in place; however, I wanted to apply 301 but dont know how. For example: My website (abc.com) when typed 302 ...
0
votes
1answer
637 views

EWS: How to bypass the load balancer on Exchange?

I have an application that uses the EWS 2.0 Managed API to connect to Exchange. It works for one setup (single Exchange server) but isn't able to connect to another load-balanced setup. For the ...
1
vote
0answers
19 views

Load Balanced Apache [closed]

I am currently working on a POC solution where I would use a software load balancer to ensure HA for two Apache servers. Please pardon any mistakes because this is the first time I am playing around ...
3
votes
1answer
2k views

HAProxy: Display a “BADREQ” | BADREQ's by the thousands

My HAProxy Configuration. #HA-Proxy version 1.3.22 2009/10/14 Copyright 2000-2009 Willy Tarreau <w@1wt.eu> global maxconn 10000 spread-checks 50 user haproxy group haproxy ...
0
votes
2answers
84 views

RapidSSL: domain name does not match the certificate common name or SAN

I'm installing SSL certifcate (RapidSSL) on Amazon AWS (Load balancer). Installation was already completed, but when I test it I get: Wrong certificate installed. The domain name does not match the ...
0
votes
1answer
75 views

I can't upload server certificate on AWS IAM

I got AWS iam working on my server, and trying to upload some certificates: aws iam upload-server-certificate --server-certificate-name domain2014 --certificate-body ...
1
vote
2answers
841 views

Unexpected behaviour when dynamically add node in HAproxy server

I wanted to use HAProxy for my web app for load balancing purpose. I am trying to add a new rabbitmq node dynamically in HAProxy server using command : haproxy -p /var/run/haproxy.pid -sf $(cat ...
1
vote
2answers
2k views

HAProxy Url pattern forwarding

I am using HAProxy for load balancing a couple of web servers (HTTP mode). The web servers are strictly dynamic, ie, there isnt any static content, only web services. The URLs of the type (analogous) ...
-1
votes
2answers
71 views

Why is my nginx load balancer misdirect phpMyAdmin after login?

In my testing server, I have an nginx load balancer pointing to Apache server(s) running on the same machine, and I've installed phpMyadmin under Apache. My nginx config: http { upstream backend ...
-1
votes
0answers
15 views

How to prepare jboss cluster of shutdown of a node?

We have a clustered application running on several servers. We want to be able to do a graceful shutdown of each node individually and while the others keep on running. The work is started via JMS ...
1
vote
3answers
922 views

How can I synchronize 2 web server files with load balance?

I need to setup a website with load balance to accommodate more visitors, I've seen on forums that varnish(balance)->apache(web1&2)->mysql(dbserver) is the way to go. I know how to setup ...
0
votes
1answer
46 views

NGINX ip_hash load balancing not working

I've set up NGINX to load-balance requests to my web app. One front end server passes requests to two backend servers. All works fine. However, I have been using the ip_hash directive to ensure users ...
0
votes
2answers
425 views

Does LVS ldirectord Load Balancer support SSL termination / offloading?

I use a ldirectord setup for load balancing a couple of real servers and for the HTTPS conenctions I am considering using some offloading mechanism on the LB - is there some functionality already ...