initial nagios signalling support for web teir

lamp_haproxy/README.md

@@ -14,6 +14,10 @@ First we configure the entire stack by listing our hosts in the 'hosts' inventor
 		[lbservers]
 		lbserver
 
+                # an optional nagios node
+                [monitoring]
+                nagiosserver
+
 After which we execute the following command to deploy the site:
 
 	ansible-playbook -i hosts site.yml
@@ -24,13 +28,13 @@ The deployment can be verified by accessing the IP address of your load balnacer
 
 Removal of a node from the cluster is as simple as executing the following command:
 
-	ansible-playbook -i hosts playbooks/remove_webservers.yml --limit=web2
+	ansible-playbook -i hosts remove_webservers.yml --limit=web2
 
 ###Add a Node
 
 Adding a node to the cluster can be done by executing the following command:
  
-	ansible-playbook -i hosts playbooks/add_webservers.yml --limit=web2
+	ansible-playbook -i hosts add_webservers.yml --limit=web2
 
 ###Rolling Update
 
@@ -41,10 +45,5 @@ that only one server will be updated at one time. If you have a lot of web serve
 
 Once the code has been updated in the source repository for your application which can be defined in the group_vars/all file, execute the following command:
 
-	 ansible-playbook -i hosts playbooks/rolling_update.yml
-
-
-
-
+	 ansible-playbook -i hosts rolling_update.yml
 
-	 

lamp_haproxy/roles/nagios/templates/servers.cfg.j2

@@ -95,7 +95,7 @@ define service {
 define service {
 	use				local-service
 	hostgroup_name			webservers
-	service_description		Apache Web Server
+	service_description	        webserver	
 	check_command			check_http
 	notifications_enabled		0
 }

lamp_haproxy/roles/web/tasks/rolling_update.yml

@@ -4,6 +4,11 @@
 - name: Remove the code from server
   command: rm -rf /var/www/html/*
 
+- name: disable nagios alerts for this host's webserver service 
+  nagios: action=disable_alerts host=$ansible_hostname services=webserver 
+  delegate_to: $item
+  with_items: ${groups.monitoring}
+
 - name: disable the server in haproxy
   shell: echo "disable server myapplb/${ansible_hostname}" | socat stdio /var/lib/haproxy/stats
   delegate_to: $item
@@ -20,3 +25,7 @@
   delegate_to: $item
   with_items: ${groups.lbservers}
 
+- name: re-enable nagios alerts
+  nagios: action=enable_alerts host=$ansible_hostname services=webserver
+  delegate_to: $item
+  with_items: ${groups.monitoring}

lamp_haproxy/rolling_update.yml

@@ -6,4 +6,4 @@
   user: root
   serial: 1
   tasks:
-   - include: ../roles/web/tasks/rolling_update.yml
+   - include: roles/web/tasks/rolling_update.yml

lamp_haproxy/web.yml

@@ -1,6 +1,7 @@
 ---
 # This playbook deploys the webservers with httpd and the code.
 
+# fetch monitoring facts for iptables rules
 - hosts: monitoring
   tasks: