Load balancing pools

A load balancer allows you to determine how network traffic is distributed between a group of servers (pool members) and how to re-route traffic if one of the servers in the pool fails.

Navigate to Products/Services → Virtual DC → Routers → LB pools → Add. 

Services

Enter the following parameters: 

• Service — select the check boxes to activate the required protocols; 
• Method — select a load balancing method for each enabled service:
  • IP Hash — a server based on a hash of the source IP address of each packet; 
  • Round Robin — each server is used in turn according to the weight assigned to it.; 
  • URI — all requests to a certain IP address will be sent to the single virtual machine; 
  • Least Connected — the new connection is sent to the server with the fewest connections.
• Port; 
• Accessibility check URI — address to check the server status. The HTTP protocol is used. 

Monitoring 

Enter the following parameters:

• Monitoring port;
• Mode — monitoring protocol; 
• Interval — the interval between calls;
• Timeout — time within which a response from the server must be received; 
• Health thresholds — a number of consecutive successful health checks before a server is declared operational; 
• Unhealth threshold — a number of consecutive unsuccessful health checks before a server is declared dead.

Pool members

Enter the following parameters:

• IP address — the IP address of the LB pool member; 
• Weight — server weight in the load balancing. 0 — the server is not used for load balancing, 1 — standard weight, 2 — the server receives double requests, etc.;
• Port;
• Monitoring port. 

Configuration rules

• for the load balancing pool you cannot disable the protocol (service) which uses the load balancing server; 
• you cannot delete the load balancing pool which is used by the load balancing server.