add redis stat

redis_stat/redis_stat.rb

@@ -0,0 +1,24 @@
+class RedisStat < Scout::Plugin
+  needs 'yaml'
+  KILOBYTE = 1024
+  MEGABYTE = 1048576
+
+  def build_report
+    cmd = "#{option('redis-cli')||'redis-cli'} info"
+    result = `#{cmd}`
+    redis_info = YAML.load(result.gsub(/:/, ": "))
+    error(:subject => 'redis-cli error', :body => "[#{cmd}]:#{result}") unless redis_info
+    data = {}
+
+    data['used_memory_in_kb'] = redis_info['used_memory'].to_f / KILOBYTE
+    data['used_memory_in_mb'] = redis_info['used_memory'].to_f / MEGABYTE
+    data['last_save_time'] = Time.at(redis_info['last_save_time']).strftime("%Y-%m-%d %H:%M:%S")
+
+    # General Stats
+
+    option('general_fields') && option('general_fields').split(',').map{|f| f.strip}.each do |key|
+      data[key] = redis_info[key]
+    end
+    report(data)
+  end
+end

redis_stat/redis_stat.yml

@@ -0,0 +1,20 @@
+options:
+  redis-cli:
+    name: redis-cli command
+    notes: redis-cli command
+    default: /usr/local/bin/redis-cli
+  general_fields:
+    name: general stat fields
+    notes: general stat fields
+    default: used_memory, changes_since_last_save, uptime_in_days, bgsave_in_progress
+
+metadata:
+  used_memory_in_kb:
+    label: Used memory
+    precision: 2
+    units: KB
+
+  used_memory_in_mb:
+    label: Used memory
+    precision: 2
+    units: MB