The latest insights from the load balancing experts | Loadbalancer.org

Linux

Can you imagine a world without Linus Torvalds’ software? We’d rather not.
Global Server Load Balancing (GSLB)
I've finally found a decent reason to use GSLB! Aaron West
Yes, it's the end of an era... after many years arguing that GSLB has no place on a proper load balancer, I've finally found a solid reason to add one to our product. Yes, you read that right! I've officially surrendered and given you a new GSLB to play with...!

14 min read

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How-To's
Layer 4 Direct Routing (LVS-DR) and Layer 4 TUN (LVS-TUN) in AWS Aaron West
Have you ever wondered if LVS works in AWS? I can already say for certain that LVS-NAT works great - but what about LVS-DR and LVS-TUN? Having spent the last several months playing in AWS,

6 min read

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MS SQL Health Check Neil Hosking
Recently we've noticed more customers are load balancing Microsoft SQL Server. We already have a built in MySQL health check in the appliance, but until now we've avoided having a Microsoft SQL check as it

4 min read

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GSLB — Why Global Server Load Balancers don’t always suck? (Polaris-GSLB) Part 2 Aaron West
In part one we were introduced to Polaris-GSLB which is a cool little open source GSLB solution, we went through a simple use case scenario and discussed the features it supports. In part two of this Blog I’m going to show you how to build Polaris-GSLB on CentOS 7.

3 min read

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GSLB – Why Global Server Load Balancers don't always suck? (Polaris-GSLB) Aaron West
Here at Loadbalancer.org we’re not known for being huge fans of GSLB solutions as some of our customers may already know and you can see from a previous blog : [GSLB – Why Do Global Server Load Balancers Suck?](http://www.loadbalancer.org/blog/gslb-why-do-global-server-load-balancers-suck)

4 min read

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Transparent HAProxy in Azure using TProxy Ben Cabot
We all know that the built-in Azure load balancer is perfectly functional, but sometimes you need a proper load balancer. HAProxy is an excellent choice if you need layer 7 functionality, but its a full

3 min read

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Supporting two default gateways on your Load balancer with PBR (Policy Based Routing) Aaron West
Occasionally we get asked questions about supporting multiple default gateways. Customers may have our appliance in two networks, each with it’s own gateway to the internet. Alternatively it may just be a big complex

4 min read

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3 Ways To Send HAProxy Health Check Email Alerts Ben Cabot
Update As of haproxy-1.6-dev1 it is now possible to send email alerts directly from HAProxy thanks to the excellent work done for us by Simon Horman. To view more details on how to configure

4 min read

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Load balancing UDP on EC2 Ben Cabot
I had been tasked with finding a way to load balance UDP on AWS. Normally we would use ipvsadm in at layer 4 DR but because of the limitations in EC2 this is not possible

2 min read

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Open Source Windows service for reporting server load back to HAProxy (load balancer feedback agent). Malcolm Turnbull
In general when you are load balancing a cluster you can evenly spread the connections through the cluster and you get pretty consistent and even load balancing. However with some applications such as RDS (Microsoft

6 min read

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Look, why can't you just tell me how many people are connected to the load balancer? Malcolm Turnbull
I must confess, at certain times it has looked like open warfare would break out between the support team and development team at Loadbalancer.org over the last few months. One reason being that a

6 min read

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HAProxy email alerts guide Aaron West
Update As of haproxy-1.6-dev1 it is now possible to send email alerts directly from HAProxy thanks to the excellent work done for us by Simon Horman. To view more details on how to configure

2 min read

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Setting up HAProxy with Transparent Mode on Centos 6.x Scott McKeown
Transparent mode with HAProxy allows you to see the IP Address of the clients computer while still having a high availability service using HAProxy. This posting shows how to setup a blank virgin installation of

3 min read

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Upstart script for Collectd Mark Brookes
We have been doing some internal testing with Collectd. "collectd gathers statistics about the system it is running on and stores this information. Those statistics can then be used to find current performance bottlenecks

1 min read

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Enabling SNAT in LVS (xt_ipvs) and iptables Mark Brookes
The vast majority of layer 4 load balancers use LVS in two-arm NAT mode. In this mode the load balancer can control all traffic and it's also source IP transparent. The disadvantage of NAT mode

3 min read

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Transparent proxy of SSL traffic using Pound to HAProxy backend patch and how-to Malcolm Turnbull
OK so I've previously blogged about how to get TPROXY and HAProxy working nicely together. But what if you want to terminate SSL traffic on the load balancer in order to use HaProxy to insert

4 min read

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How to upgrade VMware tools on the Loadbalancer.org Enterprise VA Malcolm Turnbull
UPDATED November 2014 - ALL versions of the appliance come with VMware tools pre-installed by default. These tools enable functions such as controlled OS shutdown, controlled OS restart etc. When installing or updating the tools

4 min read

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Configure HAProxy with TPROXY kernel for full transparent proxy Malcolm Turnbull
If you use HaProxy as the load balancer then all of the backend servers see the traffic coming from the IP address of the load balancer. TPROXY allows you to make sure the backend servers

5 min read

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LVS Local node patch for Linux 2.6.25, Centos 5 kernel build how-to Malcolm Turnbull
Standard Kernel builds of LVS (Linux Vitual Server) don't have the ability to load balance traffic that is from the local node. For example if you terminated some SSL traffic using stunnel or pound on

3 min read

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Load balancing via Direct Routing has several key advantages over NAT based methods Malcolm Turnbull
One of the (many) traditional problems with load balancing is the requirement to change your infrastructure in order to implement a hardware load balancer. Traditional DNS based round robin was easy as you just added

2 min read

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