Cacti 获取 SNMP 发送的自定义信息绘图

cu_Cbear

Cacti 获取 SNMP 发送的自定义信息绘图

本文以获取 squid 内存缓存命中率为例。
在 /etc/snmp/snmpd.conf 可以看到这样的样例：
# exec .1.3.6.1.4.1.2021.50 shelltest /bin/sh /tmp/shtest
可以使用自己编写的脚本，比如：
exec .1.3.6.1.4.1.2021.50 squidmemhits /usr/local/bin/squidmemhits.sh
vi /usr/local/bin/squidmemhits.sh

1. 01.#!/bin/sh
   
2. 
   
3. 02.PATH=$PATH:/usr/local/squid/bin
   
4. 
   
5. 03.export PATH
   
6. 
   
7. 04.squidclient -t 1 -h localhost -p 3128 mgr:info | grep "Memory hits" | cut -d "%" -f 2 | awk '{print $5}'
   
8. 
   
9. 05.squidclient -t 1 -h localhost -p 3128 mgr:info | grep "Memory hits" | cut -d "%" -f 3 | awk '{print $3}'
   
10. 复制代码

复制代码

/etc/init.d/snmpd restart

检查一下能否读取到数据：

1. snmpwalk -v 2c 192.168.0.200 -c public .1.3.6.1.4.1.2021.50
   
2. 01.UCD-SNMP-MIB::ucdavis.50.1.1 = INTEGER: 1
   
3. 
   
4. 02.UCD-SNMP-MIB::ucdavis.50.2.1 = STRING: "squidmemhits"
   
5. 
   
6. 03.UCD-SNMP-MIB::ucdavis.50.3.1 = STRING: "/usr/local/bin/squidmemhits.sh"
   
7. 
   
8. 04.UCD-SNMP-MIB::ucdavis.50.100.1 = INTEGER: 0
   
9. 
   
10. 05.UCD-SNMP-MIB::ucdavis.50.101.1 = STRING: "86.0"
    
11. 
    
12. 06.UCD-SNMP-MIB::ucdavis.50.101.2 = STRING: "86.6"
    
13. 
    
14. 07.UCD-SNMP-MIB::ucdavis.50.102.1 = INTEGER: 0
    
15. 
    
16. 08.UCD-SNMP-MIB::ucdavis.50.103.1 = ""
    
17. 复制代码

复制代码

其中
UCD-SNMP-MIB::ucdavis.50.101.1 = STRING: "86.0"
UCD-SNMP-MIB::ucdavis.50.101.2 = STRING: "86.6"
这两行就是所需要的。

1. 01.snmpwalk -v 1 192.168.0.200 -c public .1.3.6.1.4.1.2021.50.101.1
   
2. 
   
3. 02.UCD-SNMP-MIB::ucdavis.50.101.1 = STRING: "86.0"
   
4. 
   
5. 03.snmpwalk -v 1 192.168.0.200 -c public .1.3.6.1.4.1.2021.50.101.2
   
6. 
   
7. 04.UCD-SNMP-MIB::ucdavis.50.101.2 = STRING: "86.6"
   
8. 复制代码

复制代码

能采集到数据，就可以配置 Cacti 来接收了。
先创建数据模板：

1. 01.
   
2. 
   
3. 02.console -> Templates -> Data Templates -> Add ->
   
4. 
   
5. 03.Data Templates Name: ucd/net - Squid - Memory Hits - 5 Minute
   
6. 
   
7. 04.Data Source Name: |host_description| - Squid - Memory Hits - 5 Minute
   
8. 
   
9. 05.Data Input Method: GET SNMP Data
   
10. 
    
11. 06.Associated RRA's: remove Hourly (1 Minute Average)
    
12. 
    
13. 07.Internal Data Source Name: squid_memhits_5min
    
14. 
    
15. 08.create ->
    
16. 
    
17. 09.OID: .1.3.6.1.4.1.2021.50.101.1
    
18. 
    
19. 10.Save

复制代码

复制代码同样再创建一个 Squid - Memory Hits - 60 Minute 的数据模板。
再创建图形模板：

1. 01.console -> Templates -> Graph Templates -> Add ->
   
2. 
   
3. 02.Name: ucd/net - Squid Memory Hits
   
4. 
   
5. 03.Title: |host_description| - Squid Memory Hits
   
6. 
   
7. 04.Vertical Label: percent
   
8. 
   
9. 05.create
   
10. 
    
11. 06.
    
12. 
    
13. 07.Graph Template Items -> Add
    
14. 
    
15. 08.Data Source: ucd/net - Squid - Memory Hits - 5 Minute - (squid_memhits_5min)
    
16. 
    
17. 09.Color: FFC73B
    
18. 
    
19. 10.Graph Item Type: AREA
    
20. 
    
21. 11.Consolidation Function: AVERAGE
    
22. 
    
23. 12.Text Format: 5 Minute
    
24. 
    
25. 13.create ->
    
26. 
    
27. 14.Graph Template Items -> Add
    
28. 
    
29. 15.Graph Item Type: GPRINT
    
30. 
    
31. 16.Consolidation Function: LAST
    
32. 
    
33. 17.Text Format: Current:
    
34. 
    
35. 18.Insert Hard Return
    
36. 
    
37. 19.create ->
    
38. 
    
39. 20.
    
40. 
    
41. 21.Graph Template Items -> Add
    
42. 
    
43. 22.Data Source: ucd/net - Squid - Memory Hits - 60 Minute - (squid_memhits_60min)
    
44. 
    
45. 23.Color: FF0000
    
46. 
    
47. 24.Graph Item Type: LINE1
    
48. 
    
49. 25.Consolidation Function: AVERAGE
    
50. 
    
51. 26.Text Format: 60 Minute
    
52. 
    
53. 27.create ->
    
54. 
    
55. 28.Graph Template Items -> Add
    
56. 
    
57. 29.Graph Item Type: GPRINT
    
58. 
    
59. 30.Consolidation Function: LAST
    
60. 
    
61. 31.Text Format: Current:
    
62. 
    
63. 32.Insert Hard Return
    
64. 
    
65. 33.create -> Save

复制代码

复制代码然后就可以选择主机，添加图形了。

星期六的深夜68

谢谢分享