collectd 的資料如何對映到influxdb

本文將使用collectdctl 向influxdb 傳送資料，同時介紹collectd 的資料是如何對映到influxdb 中（建立measurements,series）

配置influxdb

[[collectd]]
enabled = true
bind-address = "127.0.0.1:25826"
database = "collectd"
retention-policy = ""
# typesdb 
typesdb = "/usr/local/cellar/collectd/5.8.0/share/collectd/types.db"

配置collected

loadplugin cpu loadplugin memory loadplugin network loadplugin unixsock

檢視influxdb 確認collectd push 資料

collectdctl listval

localhost/load/load localhost/memory/memory-active localhost/memory/memory-free localhost/memory/memory-inactive localhost/memory/memory-wired localhost/inte***ce-en0/if_errors

localhost/inte***ce-en0/if_octets

influx -database 'collectd' -execute 'show series'

load_longterm,host=localhost,type=load
load_midterm,host=localhost,type=load
load_shortterm,host=localhost,type=load
memory_value,host=localhost,type=memory,type_instance=active
memory_value,host=localhost,type=memory,type_instance=free
memory_value,host=localhost,type=memory,type_instance=inactive
memory_value,host=localhost,type=memory,type_instance=wired
inte***ce_rx,host=localhost,instance=en0,type=if_errors
inte***ce_rx,host=localhost,instance=en0,type=if_octets
inte***ce_tx,host=localhost,instance=en0,type=if_errors
inte***ce_tx,host=localhost,instance=en0,type=if_octets

cat /usr/local/cellar/collectd/5.8.0/share/collectd/types.db

load shortterm:gauge:0:5000, midterm:gauge:0:5000, longterm:gauge:0:5000 memory value:gauge:0:281474976710656 if_errors rx:derive:0:u, tx:derive:0:u

if_octets rx:derive:0:u, tx:derive:0:u

collectdb 用identifier 來描述一條資料，identifier相當與kv資料庫的key。

identifier 格式如下

[/][-]/[-]

collectdb用types.db的對映關係來描述value 的格式

identifier 的type 一定要在types.db中找到否則報錯

1. localhost/load/load type:load types.db 定義 load shortterm:gauge:0:5000, midterm:gauge:0:5000, longterm:gauge:0:5000 2. localhost/inte***ce-en0/if_octets type: if_octets types.db 定義 if_octets rx:derive:0:u, tx:derive:0:u 3. localhost/memory/memory-free type: memory (free 並不是type)

memory value:gauge:0:281474976710656

8.  其實通過4，5，6 的資料我們很容易看數collectd 到influxdb的對映關係

1. localhost/load/load plugin: load type: load typevalue: shortterm, midterm, longterm 對映到influxdb measurements: load_shortterm load_midterm load_longterm tags: host=localhost,type=load 2. localhost/memory/memory-active plugin: memory type: memory typevalue: value 對映到influxdb measurements: memory_value tags: host=localhost,type=memory,type_instance=active 3. localhost/inte***ce-en0/if_octets plugin: inte***ce type: if_octets typevalue: rx, tx measurements: inte***ce_rx, inte***ce_tx

tags: host=localhost,instance=en0,type=if_octets

9.  collectd 的 identifier
[/][-]/[-]
的`plugin_typevalue`構成了influxdb的measurements
tags：hostname=， instance=, type=, type_instance=由於 plugin_instance , type_instace 是可選的
所以collectd 倒入influxdb的資料tags 至少由hostname， type  
10. 練習

1. collectdctl putval localhost/***/load n:111 influxdb 會新建***_longterm, ***_shortterm, ***_midterm measurement tag hostname=localhost,type=load 2. collectdctl putval localhost/***/if_octets n:1:100 influxdb 會新建***_rx, ***_tx measurement 3.echo "test running:gauge:0:u" >> /usr/local/cellar/collectd/5.8.0/share/collectd/types.db collectdct putval localhost ***/test n:1000 influxdb 會新建***_test measurement

```

collectd 的資料如何對映到influxdb

o r資料對映

如何對映磁碟映像的分割槽

如何高效的處理陣列對映

collectd 的資料如何對映到influxdb

o r資料對映

如何對映磁碟映像的分割槽

如何高效的處理陣列對映

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