add print statements so user is aware of what is happening

lib/aws-missing-tools/aws-ha-release/aws-ha-release.rb

@@ -16,33 +16,61 @@ class AwsHaRelease
     @max_size_change = 0
     @inservice_polling_time = 10
     @opts = opts
+    @processes_to_suspend = %w(ReplaceUnhealthy AlarmNotification ScheduledActions AZRebalance)
   end
 
   def execute!
-    @group.suspend_processes 'ReplaceUnhealthy', 'AlarmNotification', 'ScheduledActions', 'AZRebalance'
+    @group.suspend_processes @processes_to_suspend
 
     if @group.max_size == @group.desired_capacity
+      puts "#{@group.name} has a max-size of #{@group.max_size}. In order to recycle instances max-size will be temporarily increased by 1."
       @group.update(max_size: @group.max_size + 1)
       @max_size_change = 1
     end
 
     @group.update(desired_capacity: @group.desired_capacity + 1)
 
+    puts "The list of Instances in Auto Scaling Group $asg_group_name that will be terminated is:\n#{@group.ec2_instances.map(&:id)}"
     @group.ec2_instances.each do |instance|
-      Timeout::timeout(@opts[:inservice_time_allowed]) do
-        until all_instances_inservice?(@group.load_balancers)
-          sleep @inservice_polling_time
+      time_taken = 0
+
+      begin
+        Timeout::timeout(@opts[:inservice_time_allowed]) do
+
+          until all_instances_inservice?(@group.load_balancers)
+            puts "#{time_taken} seconds have elapsed while waiting for an Instance to reach InService status."
+
+            time_taken += @inservice_polling_time
+            sleep @inservice_polling_time
+          end
+
+          deregister_instance instance, @group.load_balancers
+          sleep @opts[:elb_timeout]
+          instance.terminate false
+        end
+      rescue Timeout::Error => e
+        puts "\nDuring the last #{time_taken} seconds, a new AutoScaling instance failed to become healthy."
+        puts "The following settings were changed and will not be changed back by this script:\n"
+
+        puts "AutoScaling processes #{@processes_to_suspend} were suspended."
+        puts "The desired capacity was changed from #{@group.desired_capacity - 1} to #{@group.desired_capacity}."
+
+        if @max_size_change > 0
+          puts "The maximum size was changed from #{@group.max_size - @max_size_change} to #{@group.max_size}"
         end
 
-        deregister_instance instance, @group.load_balancers
-        sleep @opts[:elb_timeout]
-        instance.terminate false
+        raise
       end
     end
 
+    puts "#{@group.name} had its desired-capacity increased temporarily by 1 to a desired-capacity of #{@group.desired_capacity}."
+    puts "$app_name will now return the desired-capacity of #{@group.name} to its original desired-capacity of #{@group.desired_capacity - 1}."
     @group.update(desired_capacity: @group.desired_capacity - 1)
 
     if @max_size_change > 0
+      puts "\n#{@group.name} had its max_size increased temporarily by #{@max_size_change} to a max_size of #{@group.max_size}."
+      puts "The max_size of #{@group.name} will now be returned to its original max_size of #{@group.max_size - @max_size_change}."
+
       @group.update(max_size: @group.max_size - @max_size_change)
       @max_size_change = 0
     end
@@ -58,7 +86,11 @@ class AwsHaRelease
 
   def instances_inservice?(load_balancer)
     load_balancer.instances.health.each do |health|
-      return false unless health[:state] == 'InService'
+      unless health[:state] == 'InService'
+        puts "Instance #{health[:instance].id} is currently #{health[:state]} on load balancer #{load_balancer.name}."
+
+        return false
+      end
     end
 
     true

spec/aws-missing-tools/aws-ha-release/aws-ha-release_spec.rb

@@ -16,6 +16,7 @@ describe 'aws-ha-release' do
 
   before do
     AWS::AutoScaling.stub(:new).and_return(as)
+    IO.any_instance.stub(:puts)
   end
 
   describe '#initialize' do
@@ -41,10 +42,12 @@ describe 'aws-ha-release' do
 
     it 'suspends certain autoscaling processes' do
       AWS::FakeAutoScaling::Group.any_instance.should_receive(:suspend_processes)
-          .with('ReplaceUnhealthy', 'AlarmNotification', 'ScheduledActions', 'AZRebalance')
+          .with(%w(ReplaceUnhealthy AlarmNotification ScheduledActions AZRebalance))
       @aws_ha_release.execute!
     end
 
+    it 'requires certain autoscaling processes to not be suspended'
+
     it 'adjusts the max size as well as the desired capacity if the desired capacity is equal to it' do
       @group.update(max_size: 1, desired_capacity: 1)
 

spec/support/fake_ec2.rb

@@ -9,6 +9,10 @@ module AWS
 
       def terminate(decrement_desired_capacity)
       end
+
+      def id
+        'i-test'
+      end
     end
   end
 end

spec/support/fake_elb.rb

@@ -4,7 +4,10 @@ module AWS
     end
 
     class LoadBalancer
+      attr_reader :name
+
       def initialize(name, options = {})
+        @name = name
       end
 
       def instances