Load Balancer

HostupCloud Load Balancer is powered by HAProxy — the world's fastest and most widely used open-source load balancer, trusted by GitHub, Reddit, Stack Overflow, and thousands of production environments.

Deploy a fully managed load balancer in seconds with L4/L7 balancing, SSL termination, sticky sessions, and active-standby high availability.

Pricing

Region

Features

Load Balancing Algorithms

Protocol Support

• Layer 4 (TCP/UDP) — Network-level balancing for any protocol
• Layer 7 (HTTP/HTTPS) — Application-level balancing with header/path/cookie routing
• HTTP/2 — Full multiplexing support
• WebSocket — Native passthrough for real-time applications
• Proxy Protocol v2 — Preserves original client IP through the load balancer

SSL/TLS Termination

• Auto Let's Encrypt — Free SSL certificates, auto-renewed (all plans)
• Custom certificates — Upload your own SSL/TLS certs (huc.lb.medium and above)
• Wildcard domains — Supported
• HTTP/2 — Enabled by default on HTTPS listeners

Sticky Sessions

Cookie-based session persistence powered by HAProxy. Routes the same client to the same backend server throughout their session.

• Essential for stateful applications (shopping carts, login sessions)
• Configurable cookie name and TTL
• Works with both HTTP and HTTPS

Health Checks

Unhealthy backends are automatically removed from rotation and re-added on recovery.

High Availability

• Active-standby architecture — Primary and standby on separate physical hosts
• Zero-downtime failover — Automatic failover in milliseconds
• Floating IP — Same IP moves to standby transparently
• No single point of failure — The LB itself is HA

Rate Limiting & Connection Limits

Protect your backends with per-IP rate limiting and connection caps (huc.lb.medium and above):

• Per-IP connection limits
• Request rate limiting
• Slow-start for new backends
• Connection queue management

Security

• DDoS protection — Built-in network-level DDoS mitigation on all plans
• Advanced DDoS mitigation — Enhanced protection on huc.lb.large
• Private network peering — Available on huc.lb.large
• Dedicated KVM isolation — huc.lb.large runs on isolated KVM instances

Monitoring

• HAProxy stats dashboard — Real-time requests/sec, latency, connection counts, backend health
• Traffic analytics — Historical data and error rates (huc.lb.medium and above)
• API access — Query stats programmatically

Plan Comparison

API Reference

Create a Load Balancer

curl -X POST https://api.hostupcloud.com/v1/load-balancers \
  -H "Authorization: Bearer $API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "my-lb",
    "plan": "huc.lb.medium",
    "region": "in-blr",
    "algorithm": "roundrobin",
    "protocol": "https",
    "health_check": {
      "protocol": "http",
      "port": 80,
      "path": "/health",
      "interval": 10,
      "threshold": 3
    }
  }'

Add Backend Targets

curl -X POST https://api.hostupcloud.com/v1/load-balancers/{lb-id}/targets \
  -H "Authorization: Bearer $API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "targets": [
      { "ip": "10.0.0.1", "port": 8080, "weight": 100 },
      { "ip": "10.0.0.2", "port": 8080, "weight": 100 }
    ]
  }'

Enable Sticky Sessions

curl -X PATCH https://api.hostupcloud.com/v1/load-balancers/{lb-id} \
  -H "Authorization: Bearer $API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "sticky_sessions": {
      "enabled": true,
      "cookie_name": "SERVERID",
      "ttl": 3600
    }
  }'

Use Cases

Next Steps

• Deploy a Cloud Compute instance as a backend target
• Configure Floating IPs for seamless failover
• Set up Block Storage for persistent volumes
• Review Network & Connectivity for private networking
• Learn about Security & Compliance for firewall rules