FAQ: Introduction to the Load Balancer

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Introduction to the Load Balancer

Load Balancing Services
  • How do load balancers work
  • How to format a support request for new virtual IP/virtual server
  • If VIPs were included in a new product order, there will be a load balancing VIP setup ticket generated by default.
 
How do load balancers work?
See our Load Balancer Overview KB - https://kb.databank.com/KnowledgebaseArticle53321.aspx
  
How to format a support request for new virtual IP/virtual server:
Support requests for a new virtual IP/virtual server should include responses to the following questions (supplied by filling out the attached new virtual IP/virtual server request form). 

What is the name of the website/application?
This information will be used for labeling various objects created on the LB.
 
Which servers/IP addresses host the website?
If the websites are not configured yet, are we are expected to setup the websites? It is preferred to bind the websites to a non-root IP address with host-headers to conserve IP space.
 
Can we monitor the application service (ColdFusion, .NET, PHP, etc) to determine availability? Or if a website-specific check is required, what is the URL and expected response string?
The LB already has standard HTTP monitors that check various application services. The LB will connect to the IP:port for each pool member and request /probe/heartbeat.<ext> where <ext> is the extension used by the application server. Since this check connects to the IP without a host-header, it might not actually hit the intended site but it will confirm that the application service (CF, .NET, PHP) is responding. If the LB should monitor a specific URL, please provide the specific URL and response string
 
Do you need the ability to enabled/disable servers for this website without affecting other load balanced sites?
Multiple websites that use the same pool cannot be enabled/disabled without affecting the other websites. Having a separate pool, even if it points to the same IP addresses will give more granular control.
 
Does the website require SSL?
If the website requires SSL then you will need to tell us which SSL is to be used. Let us know if the SSL is already applied to a virtual server and the new website can use the same pool (and monitor),
 
Does the website need to run on a public or private IP address?
In almost all cases the virtual server needs to run on a public IP address. Some customers might prefer a private IP address if it only needs to be accessible to the servers located here.
 
If VIPs are included in a new product order, there will be a load balancing VIP setup ticket generated by default: 
For new orders, a ticket will created with a request for the same information listed in the "How to format a support request for new virtual IP/virtual server" section. This ticket will require a customer response.



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Category: Load Balancer

Last Modified:Saturday, December 15, 2012 9:14 AM

Type: HOWTO

Level: Advanced

Rated 1 star based on 1 vote

Article has been viewed 9,343 times.

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