Add a couple of AWS questions

exercises/aws/solutions/route_53_failover.md

@@ -0,0 +1,29 @@
+## AWS Route 53 - Failover
+
+### Requirements
+
+A running EC2 web instance with an health check defined for it in Route 53
+
+### Objectives
+
+1. Create a failover record that will failover to another record if an health check isn't passing
+  1. Make sure TTL is 30
+  2. Associate the failover record with the health check you have
+
+### Solution
+
+#### Console
+
+1. Go to Route 53 service
+2. Click on "Hosted Zones" in the left-side menu
+3. Click on your hosted zone
+4. Click on "Created record"
+5. Insert "failover" in record name and set record type to A
+6. Insert the IP of your instance
+7. Set the routing policy to failover
+8. Set TTL to 30
+9. Associate with an health check
+10. Add another record with the same properties as the previous one
+11. Click on "Create records"
+12. Go to your EC2 instance and edit its security group to remove the HTTP rules
+13. Use your web app and if you print the hotsname of your instance then you will notice, a failover was performed and a different EC2 instance is used