More AWS questions

Created also the file for Grafana questions.

exercises/aws/solutions/alb_multiple_target_groups.md

@@ -11,7 +11,7 @@ One EC2 instance with a simple web application that shows the web page with the
   1. healthy threshold: 3
   2. unhealthy threshold: 3
   3. interval: 10 seconds
-2. Create another target group
+2. Create another target group for the third instance
   1. Traffic should be forwarded to this group based on the "/test" path
 
 ### Solution

exercises/aws/solutions/network_load_balancer.md

@@ -0,0 +1,35 @@
+## AWS ELB - Network Load Balancer
+
+### Requirements                   
+
+Two running EC2 instances
+
+### Objectives
+
+1. Create a network load balancer 
+  1. healthy threshold: 3
+  2. unhealthy threshold: 3
+  3. interval: 10 seconds
+  4. Listener should be using TCP protocol on port 80
+
+### Solution
+
+#### Console
+
+1. Go to EC2 service
+2. Click in the left side menu on "Load balancers" under "Load balancing"
+3. Click on "Create load balancer"
+4. Choose "Network Load Balancer"
+5. Insert a name for the LB
+6. Choose AZs where you want the LB to operate
+7. Choose a security group
+8. Under "Listeners and routing" click on "Create target group" and choose "Instances"
+  1. Provide a name for the target group
+  2. Set healthy threshold to 3
+  3. Set unhealthy threshold to 3
+  4. Set interval to 10 seconds
+  5. Set protocol to TCP and port to 80
+  6. Click on "Next" and choose two instances you have
+  7. Click on "Create target group"
+9. Refresh target groups and choose the one you've just created
+10. Click on "Create load balancer" and wait for it to be provisioned