Reduce ec2 instance controller API calls

The EC2 instance controller synchronously makes several
DescribeInstanceAttribut calls to the EC2 API and does not use the
results. This slows down the reconcile time for a single observation.

This removes the API calls for attributes that are returned in
`RunInstances`.

pkg/clients/ec2/instance.go

@@ -190,8 +190,8 @@ func LateInitializeInstance(in *manualv1alpha1.InstanceParameters, instance *typ
 		in.InstanceInitiatedShutdownBehavior = pointer.LateInitializeValueFromPtr(in.InstanceInitiatedShutdownBehavior, attributes.InstanceInitiatedShutdownBehavior.Value)
 	}
 
-	if attributes.InstanceType != nil {
-		in.InstanceType = pointer.LateInitializeValueFromPtr(in.InstanceType, attributes.InstanceType.Value)
+	if in.InstanceType == "" {
+		in.InstanceType = string(instance.InstanceType)
 	}
 
 	if attributes.UserData != nil {

pkg/controller/ec2/instance/controller.go

@@ -158,11 +158,7 @@ func (e *external) Observe(ctx context.Context, mgd resource.Managed) (managed.E
 
 	for _, input := range []types.InstanceAttributeName{
 		types.InstanceAttributeNameDisableApiTermination,
-		types.InstanceAttributeNameEbsOptimized,
 		types.InstanceAttributeNameInstanceInitiatedShutdownBehavior,
-		types.InstanceAttributeNameInstanceType,
-		types.InstanceAttributeNameKernel,
-		types.InstanceAttributeNameRamdisk,
 		types.InstanceAttributeNameUserData,
 	} {
 		r, err := e.client.DescribeInstanceAttribute(ctx, &awsec2.DescribeInstanceAttributeInput{
@@ -178,26 +174,10 @@ func (e *external) Observe(ctx context.Context, mgd resource.Managed) (managed.E
 			o.DisableApiTermination = r.DisableApiTermination
 		}
 
-		if r.EbsOptimized != nil {
-			o.EbsOptimized = r.EbsOptimized
-		}
-
 		if r.InstanceInitiatedShutdownBehavior != nil {
 			o.InstanceInitiatedShutdownBehavior = r.InstanceInitiatedShutdownBehavior
 		}
 
-		if r.InstanceType != nil {
-			o.InstanceType = r.InstanceType
-		}
-
-		if r.KernelId != nil {
-			o.KernelId = r.KernelId
-		}
-
-		if r.RamdiskId != nil {
-			o.RamdiskId = r.RamdiskId
-		}
-
 		if r.UserData != nil {
 			o.UserData = r.UserData
 		}