Configure the Load Balancer

Eucalyptus provides optional support for Load Balancing. In order to use this support, you will need to register the Load Balancer image with the cloud.

Install and Register the Load Balancer Image

Eucalyptus provides a tool for installing and registering the Load Balancer image. Once you have run the tool, your Load Balancer will be ready to use.

Note: This command is not necessary if you've already performed the steps in Install and Configure the Imaging Service.

Run the following commands on the machine where you installed the eucalyptus-service-image RPM package (it will set the imaging.imaging_worker_emi property to the newly created EMI of the imaging worker):

esi-install-image --install-default

Verify Load Balancer Configuration

If you would like to verify that Load Balancer support is enabled you can list installed Load Balancers. The currently active Load Balancer will be listed as enabled. If no Load Balancers are listed, or none are marked as enabled, then your Load Balancer support has not been configured properly.

Run the following command to list installed Load Balancer images:

esi-describe-images

This will produce output similar to the followin:

SERVICE     VERSION  ACTIVE     IMAGE      INSTANCES
    imaging       2.2      *     emi-573925e5      0
 loadbalancing    2.2      *     emi-573925e5      0
    database      2.2      *     emi-573925e5      0

You can also check the enabled Load Balancer EMI with:
```
euctl services.loadbalancing.worker.image
```
If you need to manually set the enabled Load Balancer EMI use:
```
euctl services.loadbalancing.worker.image=emi-12345678
```

Parent topic: Configure the Runtime Environment Previous topic: Install and Configure the Imaging Service Next topic: Configure Node Controllers