#214 Add the ability to configure health check params

Author: misnyo

README.md

@@ -481,6 +481,15 @@ The Amazon Resource Name for the associated IAM profile.
 #####`scheme`
 *Optional* Whether the load balancer is internal or public facing. This parameter is set at creation only; it is not affected by updates. Valid values are 'internal', 'internet-facing'. Default value is 'internet-facing' and makes the load balancer publicly available.
 
+#####`health_check`
+*Optional* The health check which the load balancer should perform. For more description, see [AWS Elastic Load Balancing HealthCheck](http://docs.aws.amazon.com/sdkforruby/api/Aws/ElasticLoadBalancing/Types/HealthCheck.html). Accepts a Hash of the following values(all are required):
+  * target
+  * interval
+  * timeout
+  * healthy_threshold
+  * unhealthy_threshold
+
+
 #### Type: cloudwatch_alarm
 
 ##### `name`

lib/puppet/provider/elb_loadbalancer/v2.rb

@@ -57,6 +57,16 @@ def self.load_balancer_to_hash(region, load_balancer)
         'instance_port' => listener.listener.instance_port,
       }
     end
+    health_check = {}
+    unless load_balancer.health_check.nil?
+        health_check = {
+          'healthy_threshold' => load_balancer.health_check.healthy_threshold,
+          'interval' => load_balancer.health_check.interval,
+          'target' => load_balancer.health_check.target,
+          'timeout' => load_balancer.health_check.timeout,
+          'unhealthy_threshold' => load_balancer.health_check.unhealthy_threshold,
+        }
+    end
     tag_response = elb_client(region).describe_tags(
       load_balancer_names: [load_balancer.load_balancer_name]
     )
@@ -90,6 +100,7 @@ def self.load_balancer_to_hash(region, load_balancer)
       subnets: subnet_names,
       security_groups: security_group_names,
       scheme: load_balancer.scheme,
+      health_check: health_check,
     }
   end
 
@@ -132,6 +143,10 @@ def create
 
     @property_hash[:ensure] = :present
 
+    if ! resource[:health_check].nil?
+        self.health_check = resource[:health_check]
+    end
+
     instances = resource[:instances]
     if ! instances.nil?
       instances = [instances] unless instances.is_a?(Array)
@@ -231,6 +246,20 @@ def subnets=(value)
     end
   end
 
+  def health_check=(value)
+    elb = elb_client(resource[:region])
+    elb.configure_health_check({
+      load_balancer_name: name,
+      health_check: {
+        target: value['target'],
+        interval: value['interval'],
+        timeout: value['timeout'],
+        unhealthy_threshold: value['unhealthy_threshold'],
+        healthy_threshold: value['healthy_threshold'],
+      },
+    })
+  end
+
   def destroy
     Puppet.info("Destroying load balancer #{name} in region #{target_region}")
     elb_client(target_region).delete_load_balancer(

lib/puppet/type/elb_loadbalancer.rb

@@ -91,6 +91,20 @@ def insync?(is)
     end
   end
 
+  newproperty(:health_check) do
+    desc 'Health check.'
+    def insync?(is)
+      normalise(is).to_set == normalise(should).to_set
+    end
+    def normalise(value)
+      value.each { |k,v| value[k] = v.to_s }
+      Hash[value.sort]
+    end
+    validate do |value|
+      fail 'health check should be a Hash' unless value.is_a?(Hash)
+    end
+  end
+
   validate do
     subnets = self[:subnets]
     zones = self[:availability_zones]