74 lines
5.4 KiB
Markdown
74 lines
5.4 KiB
Markdown
---
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sidebar_label: collectd
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title: collectd 写入
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---
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import CollectD from "../14-reference/_collectd.mdx"
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collectd 是一个用来收集系统性能的守护进程。collectd 提供各种存储方式来存储不同值的机制。它会在系统运行和存储信息时周期性的统计系统的相关统计信息。利用这些信息有助于查找当前系统性能瓶颈和预测系统未来的负载等。
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只需要将 collectd 的配置指向运行 taosAdapter 的服务器域名（或 IP 地址）和相应端口即可将 collectd 采集的数据写入到 TDengine，可以充分利用 TDengine 对时序数据的高效存储查询性能和集群处理能力。
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## 前置条件
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要将 collectd 数据写入 TDengine，需要几方面的准备工作。
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- TDengine 集群已经部署并正常运行
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- taosAdapter 已经安装并正常运行，具体细节请参考[ taosAdapter 的使用手册](/reference/taosadapter)
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- collectd 已经安装。安装 collectd 请参考[官方文档](https://collectd.org/download.shtml)
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## 配置步骤
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<CollectD />
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## 验证方法
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重启 collectd
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```
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sudo systemctl restart collectd
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```
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使用 TDengine CLI 验证从 collectd 向 TDengine 写入数据并能够正确读出：
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```
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taos> show databases;
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name | created_time | ntables | vgroups | replica | quorum | days | keep | cache(MB) | blocks | minrows | maxrows | wallevel | fsync | comp | cachelast | precision | update | status |
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====================================================================================================================================================================================================================================================================================
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collectd | 2022-04-20 09:27:45.460 | 95 | 1 | 1 | 1 | 10 | 3650 | 16 | 6 | 100 | 4096 | 1 | 3000 | 2 | 0 | ns | 2 | ready |
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log | 2022-04-20 07:19:50.260 | 11 | 1 | 1 | 1 | 10 | 3650 | 16 | 6 | 100 | 4096 | 1 | 3000 | 2 | 0 | ms | 0 | ready |
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Query OK, 2 row(s) in set (0.003266s)
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taos> use collectd;
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Database changed.
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taos> show stables;
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name | created_time | columns | tags | tables |
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============================================================================================
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load_1 | 2022-04-20 09:27:45.492 | 2 | 2 | 1 |
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memory_value | 2022-04-20 09:27:45.463 | 2 | 3 | 6 |
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df_value | 2022-04-20 09:27:45.463 | 2 | 4 | 25 |
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load_2 | 2022-04-20 09:27:45.501 | 2 | 2 | 1 |
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load_0 | 2022-04-20 09:27:45.485 | 2 | 2 | 1 |
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interface_1 | 2022-04-20 09:27:45.488 | 2 | 3 | 12 |
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irq_value | 2022-04-20 09:27:45.476 | 2 | 3 | 31 |
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interface_0 | 2022-04-20 09:27:45.480 | 2 | 3 | 12 |
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entropy_value | 2022-04-20 09:27:45.473 | 2 | 2 | 1 |
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swap_value | 2022-04-20 09:27:45.477 | 2 | 3 | 5 |
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Query OK, 10 row(s) in set (0.002236s)
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taos> select * from collectd.memory_value limit 10;
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ts | value | host | type_instance | type |
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=========================================================================================================================================================
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2022-04-20 09:27:45.459653462 | 54689792.000000000 | shuduo-1804 | buffered | memory |
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2022-04-20 09:27:55.453168283 | 57212928.000000000 | shuduo-1804 | buffered | memory |
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2022-04-20 09:28:05.453004291 | 57942016.000000000 | shuduo-1804 | buffered | memory |
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2022-04-20 09:27:45.459653462 | 6381330432.000000000 | shuduo-1804 | free | memory |
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2022-04-20 09:27:55.453168283 | 6357643264.000000000 | shuduo-1804 | free | memory |
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2022-04-20 09:28:05.453004291 | 6349987840.000000000 | shuduo-1804 | free | memory |
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2022-04-20 09:27:45.459653462 | 107040768.000000000 | shuduo-1804 | slab_recl | memory |
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2022-04-20 09:27:55.453168283 | 107536384.000000000 | shuduo-1804 | slab_recl | memory |
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2022-04-20 09:28:05.453004291 | 107634688.000000000 | shuduo-1804 | slab_recl | memory |
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2022-04-20 09:27:45.459653462 | 309137408.000000000 | shuduo-1804 | used | memory |
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Query OK, 10 row(s) in set (0.010348s)
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```
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