Note: UK Cloud customers must use https://mycloud.rackspace.co.uk/ to access our New Cloud Control Panel.
The following article will discuss and demonstrate how to setup a Load Balancer. Let's take a look below:
Mission critical web-based applications and workloads require an HA, or High Availability, solution. Load balancing distributes workloads across two or more servers, network links, and other resources to maximize throughput, minimize response time, and avoid overload. Rackspace Cloud Load Balancers allow customers to quickly load balance multiple Cloud Servers or external servers for optimal resource utilization.
1. First thing you'll do is login to the New Control Panel, select Load Balancers from the list at the top, and then select Create Load Balancer.
2. Next, under Identification you'll give a name to your Load Balancer. This can be any name you like.
3. Next under Configuration, you'll choose between three different choices for your Virtual IP.
4. Next, choose the Protocol and Port to which best suits your needs. Your Port will adjust to the Protocol you select, but you may also edit this portion yourself. (See Choosing the Right Protocol for more information about the protocols you can choose when configuring a Cloud Load Balancer.)
5. You'll then choose the Algorithm for your Load Balancer to which best fits your needs.
Note: this is a very important attribute to set, especially as your Load Balancer implementation gets more complex. Each algorithm has an explanation for how it assigns traffic. In most cases, the Random, Round Robin, or Least Connections algorithms will be sufficient when load-balancing two identical servers for increased web traffic. If your servers are unequal in size or resources, you should take a look at using weighted algorithms to favor your servers with more resources.
6. Next, select the region you'd like your load balancer to be created in.
Note: when selecting a region, consider the location of the backend nodes you want to load balance and provision your load balancer in a region that is geographically as close to your backend nodes as possible.
7. And lastly, you can select from options on how you'd like to set your Load Balancer to operate on one or more of your Cloud Servers, or on one or more External Nodes. Select Create Load Balancer and after your load balancer is finished building, you may view a summary of the Load Balancer you created.
Note: To add an External Node to be load-balanced, you must enter the IP address and set the port of the service that you want load-balanced (usually port 80 for HTTP traffic). Then, you can either Enable or Disable the load-balancing service on your external node directly through the Control Panel. Additional configuration options
The cost for each Cloud Load Balancer (instance) is based on an hourly rate + the number of concurrent connections + bandwidth. You can view pricing details on the product pages for Cloud Load Balancers:
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