Amazon ec2 让munin获取accoss节点总数

下面是我的munin配置文件。我正试图做一个测试，求出跨越马赫数的荷载总和。节点显示为un munin，但总数不是。我遗漏了什么吗

[ec2-50-17-142-0.compute-1.amazonaws.com]
address 50.17.142.0
use_node_name yes

[ec2-107-20-94-67.compute-1.amazonaws.com]
address 107.20.94.67
use_node_name yes

[ec2-107-21-83-181.compute-1.amazonaws.com]
address 107.21.83.181
use_node_name yes


[compute-1.amazonaws.com;Totals]
update no
load.graph_title Total load
load.sum_load.label load
load.sum_load.special_stack  ec2-50-17-142-0=ec2-50-17-142-0.compute-1.amazonaws.com:load.load  ec2-107-20-94-67=ec2-107-20-94-67.compute-1.amazonaws.com:load.load  ec2-107-21-83-181=ec2-107-21-83-181.compute-1.amazonaws.com:load.load

尝试：

[compute-1.amazonaws.com;Totals]  
update no  
load.graph_title Total load  
load.sum_load.label load  
load.sum_load.sum ec2-50-17-142-0=ec2-50-17-142-0.compute-1.amazonaws.com:load.load ec2-107-20-94-67=ec2-107-20-94-67.compute-1.amazonaws.com:load.load ec2-107-21-83-181=ec2-107-21-83-181.compute-1.amazonaws.com:load.load