add initial support for postfix_mailgraph plugin

defaults/main.yml

@@ -9,7 +9,7 @@ obs_agent_pg_enable: false
 obs_agent_apache_enable: false
 obs_agent_bind_stats: "/var/cache/bind/named.stats"
 obs_agent_bind_enable: false
-
+obs_agent_postfix_enable: false        
 
 
 

tasks/main.yml

@@ -42,3 +42,6 @@
 
 - include: tasks/bind.yml
   when: obs_agent_bind_enable == true
+
+- include: tasks/postfix.yml
+  when: obs_agent_postfix_enable == true

tasks/postfix.yml

@@ -0,0 +1,14 @@
+---
+# postfix mailgraph local agent
+# TODO: consider modification of /usr/sbin/mailgraph from $rrdstep = 60 to my $rrdstep = 300; in this script, 
+# requires cleanup of old rrds and restart to mailgraph after
+# http://docs.observium.org/apps/#postfix-mailgraph
+- name: be sure rrdtool is installed
+  apt:  pkg=rrdtool state=installed
+  tags: rrdtool
+
+  when: ansible_distribution == "Debian"  
+- name: deploy mailgraph local agent
+  copy: src=templates/local-agents/postfix_mailgraph dest=/usr/lib/observium_agent/local/postfix_mailgraph owner=root group=root mode=0655  
+
+

templates/local-agents/postfix_mailgraph

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+RRDPATH=/var/lib/mailgraph
+
+RRD_FIELDS=""
+RRD_VALUES=""
+
+for FILENAME in mailgraph_greylist.rrd mailgraph.rrd mailgraph_virus.rrd
+do
+
+  if [ -f $RRDPATH/$FILENAME ];
+  then
+    OUTPUT=$(rrdtool lastupdate $RRDPATH/$FILENAME 2>/dev/null)
+    if [ "$OUTPUT" != "" ];
+    then
+      RRD_FIELDS+=$(echo "$OUTPUT"|head -n1)
+      RRD_VALUES+=$(echo "$OUTPUT"|tail -n1|cut -d: -f2)
+    fi
+  fi
+done
+
+read -a FIELDS <<< "$RRD_FIELDS"
+read -a VALUES <<< "$RRD_VALUES"
+
+if [ ${#FIELDS[@]} != 0 ];
+then
+  echo "<<<postfix_mailgraph>>>"
+
+  for i in `seq ${#FIELDS[@]}`
+  do
+    echo ${FIELDS[$i-1]}:${VALUES[$i-1]}
+  done
+fi
+