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 operating system, configuration files, or system management tasks. We handle all the details so you can focus on your application.
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.
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 bigger web server, but a better solution might be to use multiple servers. 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, Cloud Compute, High Frequency Compute, and Dedicated Cloud.
Load balancers are effective for applications that can scale with multiple parallel instances. They distribute the load, but they don't address file synchronization or database consistency between your application instances.
The Vultr Load Balancer has its own 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.
Load balancers support up to ten instances and 10,000 simultaneous connections per load balancer.
No. A load balancer can only direct traffic for server instances located in the same datacenter location as the load balancer itself.
Unfortunately not. Load Balancers and attached instances must be in the same region.
Vultr Load Balancers are bandwidth neutral. We only charge on 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 Balancers. They are fully managed.
Vultr Load Balancers support TCP, HTTP, and HTTPS.