Auto-expire Redis metadata key via Redis EXPIRE

This commit also removed the unnecessary Vmpooler::Janitor lib

lib/vmpooler/janitor.rb

@@ -1,36 +0,0 @@
-module Vmpooler
-  class Janitor
-    def initialize(logger, redis, data_ttl)
-      # Load logger library
-      $logger = logger
-
-      # Connect to Redis
-      $redis = redis
-
-      # TTL
-      $data_ttl = data_ttl
-    end
-
-    def execute!
-      loop do
-        find_stale_vms
-
-        sleep(600)
-      end
-    end
-
-    def find_stale_vms
-      $redis.keys('vmpooler__vm__*').each do |key|
-        data = $redis.hgetall(key)
-
-        if data['destroy']
-          lifetime = (Time.now - Time.parse(data['destroy'])) / 60 / 60
-
-          if lifetime > $data_ttl
-            $redis.del(key)
-          end
-        end
-      end
-    end
-  end
-end

lib/vmpooler/pool_manager.rb

@@ -1,10 +1,8 @@
 module Vmpooler
   class PoolManager
-    def initialize(config, pools, logger, redis, graphite=nil)
+    def initialize(config, logger, redis, graphite=nil)
       $config = config
 
-      $pools   = pools
-
       # Load logger library
       $logger = logger
 
@@ -257,6 +255,9 @@ module Vmpooler
         $redis.hdel('vmpooler__active__' + pool, vm)
         $redis.hset('vmpooler__vm__' + vm, 'destroy', Time.now)
 
+        # Auto-expire metadata key
+        $redis.expire('vmpooler__vm__' + vm, ($config[:redis]['data_ttl'].to_i * 60 * 60))
+
         host = $vsphere[pool].find_vm(vm) ||
                $vsphere[pool].find_vm_heavy(vm)[vm]
 
@@ -451,7 +452,7 @@ module Vmpooler
       $redis.set('vmpooler__tasks__clone', 0)
 
       loop do
-        $pools.each do |pool|
+        $config[:pools].each do |pool|
           if ! $threads[pool['name']]
             check_pool(pool)
           else