Hi Usha,
It sounds like you may be attempting to launch instances using the "
Role Builder" rather than as a Farm. Firstly, in order to gain access to our "Shared Roles" on public clouds, you will want to execute the
Sync Shared Roles script. Please keep in mind, for private clouds such as OpenStack you will need to
register your images manually. Once you have Images/Roles created, you can then
create Farms and select your provisioning options, including instance size, when you add Farm Roles to your Farm. By the way, welcome to the Scalr Open Source community! We're excited to have you join us. Please feel free to post any issues or questions you have moving forward and we will do our best to lend a hand.
Many thanks,
Wm. Marc O'Brien
Scalr Technical Support