Create a Load Balancer

AWS Elastic Load Balancing will be used to distribute traffic evenly between all Talend ESB instances across the Availability Zones. You will create a front-end HTTP loadbalancer to load-balance incoming requests between all Talend ESB instances.

Procedure

Open EC2 console.
On the Navigation pane, under Load Balancing, choose Load Balancers.
Click Create Load Balancer.
Select Classic Load-balancer then click Continue.

Define the load-balancer:

Field	Value
Load Balancer name	`ELB-Talend-ESB`
Create LB inside	Choose `Talend VPC`.

In Listener Configuration, add the following listener:

Field	Value
Load Balancer Protocol	`HTTP`
Load Balancer Port	`8040`
Instance Protocol	`HTTP`
Instance Port	`8040`

In Select subnets, select both subnets Public subnet eu-west-1a Talend ESB and Public subnet eu-west-1b Talend ESB.

The configuration should look like this:

Click Next: Assign Security Groups.
Select Create a new security group then use the information below.

Information noteNote: Please take note of the security group name (sg-f41e8992 in this case) since this information will be used when creating the Talend ESB instance.
In Configure Health Check, use the following information:

Then click Next: Add EC2 instances.
On Add EC2 instances page, ensure that Enable Cross-Zone Load Balancing is checked.
Do not add any instances. This will be configured later when creating the Auto Scaling group.
In Add Tags, add a name tag and any other relevant tag you want. Then click Review and launch.

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