ELK企业级日志分析平台——logstash

新建一台虚拟机elk4部署logstash

[root@elk4 ~]# yum install -y jdk-11.0.15_linux-x64_bin.rpm

[root@elk4 ~]# yum install -y logstash-7.6.1.rpm

命令方式

[root@elk4 bin]# /usr/share/logstash/bin/logstash -e 'input { stdin { } } output { stdout {} }'

elasticsearch输出插件

[root@elk4 conf.d]# pwd

[root@elk4 conf.d]# vim test.conf

input {
        stdin { }
}

output {
        stdout {}

        elasticsearch {
                hosts => "192.168.92.31:9200"
                index => "logstash-%{+YYYY.MM.dd}"
        }
}

[root@elk4 conf.d]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/test.conf

启动成功后录入数据，ctrl+c退出

elasticsearch–head插件

安装依赖

[root@k8s1 ~]# yum install -y bzip2

[root@k8s1 ~]# tar jxf phantomjs-2.1.1-linux-x86_64.tar.bz2

[root@k8s1 ~]# cd phantomjs-2.1.1-linux-x86_64

[root@k8s1 phantomjs-2.1.1-linux-x86_64]# cp bin/phantomjs /usr/local/bin/

[root@k8s1 ~]# yum install -y fontconfig

[root@k8s1 ~]# phantomjs

安装插件

[root@k8s1 ~]# rpm -ivh nodejs-9.11.2-1nodesource.x86_64.rpm

[root@k8s1 ~]# yum install -y unzip

[root@k8s1 ~]# unzip elasticsearch-head-master.zip

[root@k8s1 ~]# cd elasticsearch-head-master/

[root@k8s1 elasticsearch-head-master]# npm install  --registry=https://registry.npm.taobao.org

[root@k8s1 elasticsearch-head-master]# vim _site/app.js

启动服务

[root@k8s1 elasticsearch-head-master]# npm run start &

[root@k8s1 elasticsearch-head-master]# netstat -antlp|grep :9100

修改es配置

[root@elk1 ~]# vim /etc/elasticsearch/elasticsearch.yml

http.cors.enabled: true
http.cors.allow-origin: "*"

[root@elk1 ~]# systemctl  restart elasticsearch.service

访问：192.168.92.11:9100

file输入插件

[root@elk4 conf.d]# vim es.conf

input {
      #file {
      #       path => "/var/log/messages"
      #       start_position => "beginning"
      #  }

      syslog {}

}


output {
        stdout {}

        elasticsearch {
                hosts => "192.168.92.31:9200"
                index => "rsyslog-%{+YYYY.MM.dd}"
        }
}

[root@elk4 conf.d]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/test.conf

.sincedb文件保存文件读取进度，避免数据冗余读取

[root@elk4 file]# pwd

[root@elk4 file]# l.

sincedb文件一共6个字段

1. inode编号
2. 文件系统的主要设备号
3. 文件系统的次要设备号
4. 文件中的当前字节偏移量
5. 最后一个活动时间戳（浮点数）
6. 与此记录匹配的最后一个已知路径

删除后重新读取

[root@elk4 file]# rm -f .sincedb_452905a167cf4509fd08acb964fdb20c

syslog 插件

logstash伪装成日志服务器

[root@elk4 conf.d]# vim test.conf

input {
        syslog {}
}

output {
         stdout {}

        elasticsearch {
                hosts => "192.168.92.31:9200"
                index => "syslog-%{+YYYY.MM.dd}"
        }

}

[root@elk4 conf.d]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/test.conf

配置客户端日志输出

[root@server1 ~]# vim /etc/rsyslog.conf

去掉以下行的注释

[root@elk1 ~]# systemctl  restart rsyslog.service

多行过滤插件

从server1拷贝模板文件

[root@elk1 elasticsearch]# pwd

[root@elk1 elasticsearch]# scp my-es.log elk4:/var/log/

[root@elk4 conf.d]# vim my-es-log.conf

input {

        file {
                path => "/var/log/my-es.log"
                start_position => "beginning"
                codec => multiline {
                pattern => "^["
                negate => true
                what => previous
                }
        }

}

output {
        stdout {}

        elasticsearch {
                hosts => "192.168.92.31:9200"
                index => "myeslog-%{+YYYY.MM.dd}"
        }

}

[root@elk4 conf.d]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/test.conf

grok过滤

[root@elk4 ~]# yum install -y httpd

[root@elk4 ~]# systemctl  enablel --now httpd

[root@elk4 ~]# echo www.westos.org > /var/www/html/index.html

访问此站点生成日志信息

ab -c 1 -n 500 http://192.168.92.34/index.html

编写文件

[root@elk4 conf.d]# vim grok.conf

input {
        file {
                path => "/var/log/httpd/access_log"
                start_position => "beginning"
        }
}

filter {
        grok {
                match => { "message" => "%{HTTPD_COMBINEDLOG}" }
        }
}

output {
        stdout {}

        elasticsearch {
                hosts => "192.168.92.31:9200"
                index => "apachelog-%{+YYYY.MM.dd}"
        }

}

[root@elk4 conf.d]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/grok.conf