Load Balancers

Distribute incoming traffic across multiple instances with managed load balancers.

Overview

Load balancers spread network traffic across backend servers to improve availability and fault tolerance. They support HTTP, HTTPS, TCP, and UDP protocols with Round Robin, Least Connections, or Source IP algorithms.

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Step 1: Create a Load Balancer

1. Navigate to Enterprise > Networking > Load Balancers
2. Click Create Load Balancer
3. Configure:

Setting	Description
Name	e.g., lb-production-api
Flavor	Compute size (vCPU, RAM) for the load balancer
Network type	Private (select network + subnet) or Public
IP family	IPv4, IPv6, or Dual
Preferred connectivity	L3 (default) or L2
Reserved IP	Optional — assign a static VIP
Tags	Optional — key-value metadata

4. Review the estimated cost in the sidebar and click Create Load Balancer

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Step 2: Manage Load Balancers

From the load balancer list, use the three-dot menu to:

• Overview — View general info, statistics (connections, bytes, errors), and resize the flavor
• Rename — Update the load balancer name
• Delete — Remove the load balancer

To resize, open Overview > Change Configuration, select a new flavor, and click Save.

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Step 3: Create a Listener

Listeners define how the load balancer receives traffic.

1. Select a load balancer in the Listener Creation section
2. Click Create Listener
3. Configure:

Setting	Description
Name	e.g., http-web
Protocol	HTTP, HTTPS, TCP, or UDP
Port	1–65535
Connection limit	Max connections (-1 for unlimited)
Allowed CIDRs	IP allowlist (optional)
X-Forwarded headers	HTTP only — adds forwarding headers
TLS certificate	TERMINATED_HTTPS only
User list	HTTP only — basic auth users

Use the three-dot menu on a listener to Edit, Delete, or Add pool.

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Step 4: Add a Pool

A pool defines the backend servers that receive traffic from a listener.

1. Click the three-dot menu on a listener and select Add pool
2. Configure:

Setting	Description
Pool name	e.g., backend-pool
Algorithm	Round Robin, Least Connection, or Source IP
Protocol	HTTP, HTTPS, TCP, UDP, PROXY, or PROXYV2

3. Add members (Instance, Baremetal, or Custom IP) with port and weight
4. Optionally enable Health check (HTTP, HTTPS, PING, TCP, or TLS-HELLO) with interval and threshold settings
5. Click Save

Click a listener card to view Listener Details — pool overview, member table, and health check status. Use Edit or Delete from there to manage the pool.

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Troubleshooting

Problem	Solution
Stuck in PENDING_CREATE	Check Tasks page and quota limits
502 Bad Gateway	Verify backend health and health check config
No traffic reaching backends	Check listener protocol, port, and allowed CIDRs
Pool member OFFLINE	Ensure member is running and health endpoint reachable
Cannot resize	Select a different flavor than the current one

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