Description of problem:

The openshift-ansible AWS provisioning currently deploys instances via scalegroups.  The AWS provisioning sets up multiple Subnets which are associated with different AZ's.  However, when deploying the scalegroup, it only uses one subnet, which is only one AZ.

The line of code is here:

https://github.com/openshift/openshift-ansible/blob/master/roles/openshift_aws/tasks/scale_group.yml#L19

This only chooses one subnet.  This needs to be expanded to use multiple subnets in multiple AZ's.


Version-Release number of selected component (if applicable):

openshift-ansible 3.9, 3.10


Additional info:

the ansible module "ec2_asg" also has another option, "availability_zones" which might be useful in this scenario.  I'm only putting it here as something to note and look at.