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How to Resize a Vultr Load Balancer

Updated on April 7, 2025

Resizing a Vultr Load Balancer by increasing the number of nodes involves updating the Load Balancer’s configuration to incorporate additional servers. This adjustment distributes incoming traffic across a greater number of nodes, which enhances both performance and reliability by reducing the load on individual servers and improving overall capacity. By scaling up the number of nodes, you ensure that your application can handle higher traffic volumes and maintain optimal performance.

Follow this guide to resize a Vultr Load Balancer on your Vultr account using the Vultr Customer Portal, API, or CLI.

  • Vultr Customer Portal
  • Vultr API
  • Vultr CLI
  1. Navigate to Products and click Load Balancers.
  2. Click your target Load Balancer to open its management page.
  3. Click Configuration.
  4. Click Nodes in the left navigation menu.
  5. Increase the number of nodes.
  6. Click Apply.

  1. Send a GET request to the List Load Balancers endpoint and note the target Load Balancer's ID.

    console 
    $ curl "https://api.vultr.com/v2/load-balancers" \
    -X GET \
    -H "Authorization: Bearer ${VULTR_API_KEY}"

  2. Send a PATCH request to the Update Load Balancers endpoint to increase the node size of the target Load Balancer by an odd number.

    console 
    $ curl "https://api.vultr.com/v2/load-balancers/{load-balancer-id}" \
    -X PATCH \
    -H "Authorization: Bearer ${VULTR_API_KEY}" \
    -H "Content-Type: application/json" \
    --data '{
        "nodes": {new-node-size}
    }'

  3. Send a GET request to the Get Load Balancer endpoint to fetch the details of the target Load Balancer.

    console 
    $ curl "https://api.vultr.com/v2/load-balancers/{load-balancer-id}" \
    -X GET \
    -H "Authorization: Bearer ${VULTR_API_KEY}"

  1. List all available instances and note the target Load Balancer's ID.

    console 
    $ vultr-cli load-balancer list

  2. Update the target Load Balancer's node size.

    console 
    $ vultr-cli load-balancer update <load-balancer-id> --nodes <new-node-size>

  3. Get the details of the target Load Balancer.

    console 
    $ vultr-cli load-balancer get <load-balancer-id>

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