基于fluentd实现读取nginx日志输出到kafka

基于fluentd实现读取nginx日志输出到kafka,第1张

基于fluentd实现读取nginx日志输出到kafka

基于fluentd实现读取nginx日志输出到kafka

一、浅谈fluentd

1.1、什么是Fluentd?1.2、应该选择 fluentd 还是 td-agent? 二、安装td-agent服务器

2.1、安装td-agent2.2、启动td-agent服务2.3、使用http post请求测试 三、怎么去使用这个td-agent

3.1、了解td-agent的内部结构

1)Input Plugin2)Parse Plugin3)Filter Plugin4)Output Plugin 四、Fluentd在实际中的架构以及实际应用

一、浅谈fluentd 1.1、什么是Fluentd?

Fluentd是一个用于统一日志层的开源数据收集器。Fluentd允许您统一数据收集和使用,以便更好地使用和理解数据。Fluentd是云端原生计算基金会(CNCF)的成员项目之一,遵循Apache 2 License协议。
Treasure Data, Inc 对该产品提供支持和维护。fluent-bit 是一个用 C 写成的插件式、轻量级、多平台开源日志收集工具。它允许从不同的源收集数据并发送到多个目的地。这个两个日志收集组件完全兼容docker 和kubernetes 生态环境。随着 Kubernetes 的强势崛起,业务分布在多个计算节点,日志收集凸显重要,本文主要讲述本人在使用 fluentd 和 fluent-bit 中碰到的问题,以及解决方法。

Fluentdtd-agent支持社区驱动Treasure Data提供支持和维护安装Ruby gemsrpm / deb / dmg 软件包配置自己配置预配置了几个建议设置其它组件$ fluent-gem install fluent-plugin-xx$ /usr/sbin/td-agent-gem install fluent-plugin-xx/etc/init.d/ 脚本无有内存分配方式系统默认优化(jemalloc) 1.2、应该选择 fluentd 还是 td-agent?

td-agent 是基于 fluentd 核心功能开发,td-agent 优先考虑稳定性而不是新功能。如果您希望自己控制Fluentd功能和更新,建议使用 Fluentd gem。如果您是第一次使用 Fluentd 或在生产环境集群环境中使用它,建议使用td-agent。每2或3个月发布一次新版本的td-agent。

二、安装td-agent服务器

博主使用的是centos7虚拟机,所以按照官网的安装手册是这样的,别的系统可参考==>fluentd安装

2.1、安装td-agent

curl -L https://toolbelt.treasuredata.com/sh/install-redhat-td-agent3.sh | sh

2.2、启动td-agent服务
systemctl start td-agent.service
systemctl status td-agent.service

2.3、使用http post请求测试

td-agent的配置文件是/etc/td-agent/td-agent.conf
td-agent的日志文件是/var/log/td-agent/td-agent.log

curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test
tail -n 1 /var/log/td-agent/td-agent.log

三、怎么去使用这个td-agent 3.1、了解td-agent的内部结构

1)Input Plugin

自带插件:tail、forward、udp、tcp、http等等
需安装插件:sql、dstat等等


  @type tail
  path /var/log/httpd-access.log
  pos_file /var/log/td-agent/httpd-access.log.pos
  tag apache.access
  
    @type apache2
  

2)Parse Plugin

自带插件:regexp、apache2、nginx、csv、json、multiline等等


  @type regexp
  expression /^[(?[^]]*)] (?[^ ]*) (?[^ ]*) (?<id>d*)$/
  time_key logtime
  time_format %Y-%m-%d %H:%M:%S %z
  types id:integer
</parse>
</pre> 
3)Filter Plugin 
<p>自带插件:record_transformer、grep、parser等等</p> 
<pre class='brush:php;toolbar:false'><filter foo.bar>
  @type grep

  <regexp>
    key message
    pattern /cool/
  </regexp>

  <regexp>
    key hostname
    pattern /^webd+.example.com$/
  </regexp>

  <exclude>
    key message
    pattern /uncool/
  </exclude>
</filter>
</pre> 
<pre class='brush:php;toolbar:false'>The value of the message field contains cool. 
这个message值中包含cool
The value of the hostname field matches web<INTEGER>.example.com. 
这个hostname中匹配这个规则
The value of the message field does NOT contain uncool.
这个message值中不包含uncool
</pre> 
4)Output Plugin 
<p>自带插件:file、forward、http、copy、kafka、elasticsearch等等<br /> 需要安装的插件:sql、hdfs等等</p> 
<pre class='brush:php;toolbar:false'><match pattern>
  @type kafka2

  # list of seed brokers
  brokers <broker1_host>:<broker1_port>,<broker2_host>:<broker2_port>
  use_event_time true

  # buffer settings
  <buffer topic>
    @type file
    path /var/log/td-agent/buffer/td
    flush_interval 3s
  </buffer>

  # data type settings
  <format>
    @type json
  </format>

  # topic settings
  topic_key topic
  default_topic messages

  # producer settings
  required_acks -1
  compression_codec gzip
</match>
</pre> 
<pre class='brush:php;toolbar:false'>brokers       kafka的服务器地址
buffer        缓存刷新(可以保存到文件,设置刷新时间)
format        格式化
topic         目标topic
default_topic 默认topic
</pre> 
四、Fluentd在实际中的架构以及实际应用 
<p>利用Fluentd在各个服务器上抓取日志信息,再推送给Mysql或者ES或者JAVA应用等等进行可视化展示<br /> <br /> 博主实现的是利用Fluentd抓取nginx日志到kafka<br /> 配置的td-agent.conf</p> 
<pre class='brush:php;toolbar:false'><source>
  @type tail
  @id input_tail
  path /mydata/nginx/logs/access.log
  pos_file /var/log/td-agent/nginx-access.log.pos
  <parse>
    @type regexp
    expression /^(?<remote>[^ ]*) (?<host>[^ ]*) (?<user>[^ ]*) [(?<time>[^]]*)] "(?<method>S+)(?: +(?<path>[^"]*?)(?: +S*)?)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^"]*)" "(?[^"]*)"(?:s+(?<http_x_forwarded_for>[^ ]+))? "(?<request_time>[^"]*)" "(?<response_time>[^"]*)" "(?<request_length>[^"]*)" "(?<upstream_addr>[^"]*)")?$/
    time_key time
    time_format %d/%b/%Y:%H:%M:%S %z
  </parse>
  tag td.nginx.access
</source>

<filter td.nginx.access>
  @type grep
  regexp1 path catalog.json
</filter>

<match td.nginx.access>
  @type kafka2
  
  brokers 127.0.0.1:9092
  use_event_time true

  <buffer nginx>
    flush_interval  5s
  </buffer>

  <format>
    @type json
  </format>

  topic_key nginx
  default_topic messages

  required_acks -1
  compression_codec gzip
</match>
</pre> 
<p>根据nginx日志记录的格式抓取<br /> <br /> 使雍springboot继承kafka监听消息<br /> 成功消费kafka中推送的日志信息<br /> </p> 
<p>最后感谢B站大佬的指导视频 ===> 分布式日志采集工具:fluentd-20200708-王子健</p>					
										


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