set instance_profile_name to sandbox

playbooks/edx-east/edx_provision.yml

@@ -15,6 +15,7 @@
       dns_name: "{{ dns_name }}"
       dns_zone: "{{ dns_zone }}"
       terminate_instance: true
+      instance_profile_name: sandbox
 
 - name: Configure instance(s)
   hosts: launched

playbooks/roles/launch_ec2/tasks/main.yml

@@ -46,6 +46,7 @@
     instance_tags: "{{instance_tags}}"
     root_ebs_size: "{{ root_ebs_size }}"
     zone: "{{ zone }}"
+    instance_profile_name: "{{ instance_profile_name }}"
   register: ec2
 
 - name: launch_ec2 | Add DNS name