Author: David FinsterLast Updated: Wed, Jul 27, 2022
The Vultr Load Balancer is a fully-managed solution to distribute traffic to multiple application servers. With a Vultr Load Balancer, you can enable horizontal scaling and increase the reliability of your applications in seconds by setting a few parameters through the customer portal. You don't need to worry about the underlying load balancer server operating system, configuration files, or system management tasks. We handle all the details so you can focus on your application.
Assume you have an e-commerce store with a single web server.
As your store becomes more popular, you need to scale up your site to manage the traffic. You could use a more powerful web server, but a better solution might be to use multiple servers and load balancer tools. If you add two more servers and a Vultr Load Balancer, your network looks like this.
Using a load balancer has several advantages.
Vultr Load Balancers support custom health checks, multiple load balancing algorithms, sticky sessions, proxy protocol, SSL certificates, firewalls, private networks, and more. Vultr Load Balancers work with all our server products, including Bare Metal.
Load balancers are effective for applications that can scale with multiple parallel instances. They distribute the load but don't address file synchronization or database consistency between your application instances.
To deploy a new Vultr Load Balancer, navigate to the Add Load Balancer page in the customer portal.
Choose a Load Balancer Configuration.
Create at least one forwarding rule. Do not use ports 65300-65310 because the Load Balancer uses these internally.
VPC Network defaults to Public. If you prefer sending traffic to your instances via their attached VPC, choose that here.
When you have completed the form, click the Add Load Balancer button to deploy.
After the load balancer deploys, navigate to the Load Balancer section, click the three-dot More menu, and click Manage.
On the Manage Load Balancer page, click the Add Instance button, then select an available instance from your location.
The Vultr Load Balancer has an integrated firewall. You can learn more in our article How to Use the Vultr Load Balancer Firewall.
The Vultr Firewall can use a Load Balancer as an IP source. We explain more in How to Use the Vultr Firewall with a Vultr Load Balancer.
Explore an advanced scenario with private networking and multiple firewalls in How to Configure a Vultr Load Balancer with Private Networking, where you'll create an advanced configuration like this.
This guide is an overview of Load Balancer concepts. If you need more information about a specific feature, the Vultr Load Balancer Feature Reference has detailed configuration information.
Load balancers support up to 10,000 simultaneous connections per load balancer.
No. A load balancer can only direct traffic for server instances in the same location as the load balancer server itself.
Unfortunately not. Load Balancers and attached instances must be in the same location.
Vultr Load Balancers are bandwidth neutral. We only charge for bandwidth on the instances attached to the load balancer.
You can assign and remove instances to your Load Balancer in the Vultr customer portal.
You do not have to worry about managing Vultr Load Balancer software. They are fully managed.
Vultr Load Balancers support TCP, HTTP, and HTTPS.