move to Elastic IP (#512)

roles/cloud-ec2/tasks/main.yml

@@ -26,7 +26,7 @@
 
     - name: Add new instance to host group
       add_host:
-        hostname: "{{ stack.stack_outputs.PublicIP }}"
+        hostname: "{{ stack.stack_outputs.ElasticIP }}"
         groupname: vpn-host
         ansible_ssh_user: ubuntu
         ansible_python_interpreter: "/usr/bin/python2.7"
@@ -35,7 +35,7 @@
         ipv6_support: yes
 
     - set_fact:
-        cloud_instance_ip: "{{ stack.stack_outputs.PublicIP }}"
+        cloud_instance_ip: "{{ stack.stack_outputs.ElasticIP }}"
 
     - name: Get EC2 instances
       ec2_remote_facts:

roles/cloud-ec2/templates/stack.yml.j2

@@ -36,7 +36,7 @@ Resources:
     Type: AWS::EC2::Subnet
     Properties:
       CidrBlock: {{ ec2_vpc_nets.subnet_cidr }}
-      MapPublicIpOnLaunch: true
+      MapPublicIpOnLaunch: false
       Tags:
         - Key: Environment
           Value: Algo
@@ -184,9 +184,13 @@ Resources:
         - Key: Environment
           Value: Algo
 
-Outputs:
-  PublicIP:
-    Value:
-      Fn::GetAtt:
+  ElasticIP:
+    Type: AWS::EC2::EIP
+    Properties:
+      InstanceId: !Ref EC2Instance
+    DependsOn:
       - EC2Instance
-      - PublicIp
+
+Outputs:
+  ElasticIP:
+    Value: !Ref ElasticIP