Scaling a regional load balancer adjusts its performance to its workload by changing the number of nodes the load balancer contains. You can scale regional load balancers up or down at any time to meet your traffic needs. You cannot scale global load balancers.
You can add up to 200 nodes to a load balancer if your account limits allow it. To request a limit increase, contact support. If you are a team owner or resource modifier, you can check your resource limits and request an increase on the Resource Limits page in the DigitalOcean Control Panel.
How to Scale a Load Balancer Using the DigitalOcean API
Create a personal access token and save it for use with the API.
cURL
Send a PUT request to https://api.digitalocean.com/v2/load_balancers/{lb_id}.
Using cURL:
curl -X PUT \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
-d '{"name":"example-lb-01","size_unit":"2","region":"nyc3","algorithm":"least_connections","forwarding_rules":[{"entry_protocol":"http","entry_port":80,"target_protocol":"http","target_port":80},{"entry_protocol":"https","entry_port":444,"target_protocol":"https","target_port":443,"tls_passthrough":true}],"health_check":{"protocol":"http","port":80,"path":"/","check_interval_seconds":10,"response_timeout_seconds":5,"healthy_threshold":5,"unhealthy_threshold":3},"sticky_sessions":{"type":"cookies", "cookie_name": "DO_LB", "cookie_ttl_seconds": 300}, "firewall":{"deny":["ip:1.2.3.4","cidr:2.3.4.0/24"], "allow":["cidr:1.2.0.0/16","ip:2.3.4.5"]}, "droplet_ids": [3164444, 3164445]}' \
"https://api.digitalocean.com/v2/load_balancers/4de7ac8b-495b-4884-9a69-1050c6793cd6"
Go
Using Godo, the official DigitalOcean API client for Go:
import (
"context"
"os"
"github.com/digitalocean/godo"
)
func main() {
token := os.Getenv("DIGITALOCEAN_TOKEN")
client := godo.NewFromToken(token)
ctx := context.TODO()
updateRequest := &godo.LoadBalancerRequest{
Name: "example-01",
SizeUnit: "2",
Algorithm: "round_robin",
Region: "nyc3",
ForwardingRules: []godo.ForwardingRule{
{
EntryProtocol: "http",
EntryPort: 80,
TargetProtocol: "http",
TargetPort: 80,
},
{
EntryProtocol: "https",
EntryPort: 443,
TargetProtocol: "https",
TargetPort: 443,
TlsPassthrough: true,
},
},
HealthCheck: &godo.HealthCheck{
Protocol: "http",
Port: 80,
Path: "/",
CheckIntervalSeconds: 10,
ResponseTimeoutSeconds: 5,
HealthyThreshold: 5,
UnhealthyThreshold: 3,
},
StickySessions: &godo.StickySessions{
Type: "cookies",
CookieName: "DO_LB",
CookieTtlSeconds: 300,
},
DropletIDs: []int{3164444, 3164445},
RedirectHttpToHttps: false,
Firewall: &godo.LBFirewall{
Deny: []string{"ip:1.2.3.4", "cidr:2.3.4.0/24"},
Allow: []string{"cidr:1.2.0.0/16", "ip:2.3.4.5"},
}
}
lb, _, err := c.LoadBalancers.Update(ctx, "c2c97ca7-6f63-4e23-8909-906fd86efb5e", updateRequest)
}
Ruby
Using DropletKit, the official DigitalOcean API client for Ruby:
require 'droplet_kit'
token = ENV['DIGITALOCEAN_TOKEN']
client = DropletKit::Client.new(access_token: token)
load_balancer = DropletKit::LoadBalancer.new(
name: 'example-lb-01',
size_unit: '2',
algorithm: 'round_robin',
droplet_ids: [ 3164444, 3164445],
redirect_http_to_https: true,
region: 'nyc3',
forwarding_rules: [
DropletKit::ForwardingRule.new(
entry_protocol: 'http',
entry_port: 80,
target_protocol: 'http',
target_port: 80,
certificate_id: '',
tls_passthrough: false
),
DropletKit::ForwardingRule.new(
entry_protocol: 'https',
entry_port: 443,
target_protocol: 'https',
target_port: 443,
certificate_id: '',
tls_passthrough: true
)
],
sticky_sessions: DropletKit::StickySession.new(
type: 'cookies',
cookie_name: 'DO-LB-COOKIE',
cookie_ttl_seconds: 5
),
health_check: DropletKit::HealthCheck.new(
protocol: 'http',
port: 80,
path: '/',
check_interval_seconds: 10,
response_timeout_seconds: 5,
healthy_threshold: 5,
unhealthy_threshold: 3
)
)
client.load_balancers.update(load_balancer, id: '4de7ac8b-495b-4884-9a69-1050c6793cd6')
Python
Using PyDo, the official DigitalOcean API client for Python:
import os
from pydo import Client
client = Client(token=os.environ.get("DIGITALOCEAN_TOKEN"))
req = {
"name": "updated-example-lb-01",
"region": "nyc3",
"droplet_ids": [
3164444,
3164445
],
"algorithm": "round_robin",
"forwarding_rules": [
{
"entry_protocol": "http",
"entry_port": 80,
"target_protocol": "http",
"target_port": 80,
"certificate_id": "",
"tls_passthrough": false
},
{
"entry_protocol": "https",
"entry_port": 443,
"target_protocol": "https",
"target_port": 443,
"certificate_id": "",
"tls_passthrough": true
}
],
"health_check": {
"protocol": "http",
"port": 80,
"path": "/",
"check_interval_seconds": 10,
"response_timeout_seconds": 5,
"healthy_threshold": 5,
"unhealthy_threshold": 3
},
"sticky_sessions": {
"type": "none"
},
"redirect_http_to_https": False,
"enable_proxy_protocol": True,
"enable_backend_keepalive": True,
"vpc_uuid": "c33931f2-a26a-4e61-b85c-4e95a2ec431b",
"project_id": "9cc10173-e9ea-4176-9dbc-a4cee4c4ff30",
"http_idle_timeout_seconds": 60,
"firewall": {
"deny": [
"cidr:1.2.0.0/16",
"ip:2.3.4.5"
],
"allow": [
"ip:1.2.3.4",
"cidr:2.3.4.0/24"
]
}
}
resp = client.load_balancers.update(lb_id="fda9fda", body=req)
