使用Docker及k8s启动logstash服务

　　前提：搭建好elasticsearch和kibana服务

　　下载镜像,需要下载与elasticsearch和kibana相同版本镜像

docker pull docker.elastic.co/logstash/logstash:6.6.2

　　编写收集日志配置文件

# cat /etc/logstash/conf.d/logstash.conf
input{
    stdin{}
}

filter{
}

output{
    elasticsearch{
    hosts => ["172.16.90.24:9200"]
    index => "logstash-%{+YYYY.MM.dd}"
    }
    stdout{
    codec => rubydebug
    }
}

　　标准输入输出至elasticsearch和标准输出

　　编写logstash配置文件

# cat /etc/logstash/conf.d/logstash.yml
http.host: "0.0.0.0"
xpack.monitoring.elasticsearch.url: http://172.16.90.24:9200

　　使用docker启动logstash

docker run --rm -it -v /etc/logstash/conf.d/logstash.conf:/usr/share/logstash/pipeline/logstash.conf -v /etc/logstash/conf.d/logstash.yml:/usr/share/logstash/config/logstash.yml docker.elastic.co/logstash/logstash:6.6.2

　　参数解析

docker run #运行
--rm #退出删除
-it  #后台运行
-v /etc/logstash/conf.d/logstash.conf:/usr/share/logstash/pipeline/logstash.conf#挂载日志收集配置文件
-v /etc/logstash/conf.d/logstash.yml:/usr/share/logstash/config/logstash.yml#挂载logstash配置文件默认主机是elasticsearch
 docker.elastic.co/logstash/logstash:6.6.2#使用的镜像

　　标准输入所以可以在屏幕输入

　　登录kibana添加日志也可以查看到相同内容

　　使用logstash启动5044端口收集日志

　　logstash配置文件

input{
   beats{
       port => 5044
   }
}

filter{
}

output{
    elasticsearch{
    hosts => ["172.16.90.24:9200"]
    index => "logstash-%{+YYYY.MM.dd}"
    }
    stdout{
    codec => rubydebug
    }
}

　　启动5044端口把日志输出至elasticsearch和标准屏幕输出

　　启动

docker run --rm -it -v /etc/logstash/conf.d/logstash.conf:/usr/share/logstash/pipeline/logstash.conf -v /etc/logstash/conf.d/logstash.yml:/usr/share/logstash/config/logstash.yml -p 5044:5044 docker.elastic.co/logstash/logstash:6.6.2

　　在主机暴露5044端口

　　安装filebeat并配置文件用于收集日志

# sed '/#/d' /etc/filebeat/filebeat.yml |sed '/^$/d'
filebeat.inputs:
- type: log
  enabled: true
  paths:
    - /var/log/messages
filebeat.config.modules:
  path: ${path.config}/modules.d/*.yml
  reload.enabled: false
setup.template.settings:
  index.number_of_shards: 3
setup.kibana:
output.logstash:
  hosts: ["192.168.1.11:5044"]
processors:
  - add_host_metadata: ~
  - add_cloud_metadata: ~

　　启动filebeat

systemctl start filebeat

　　但此时logstash写入elasticsearch会报错：failed to parse field [host] of type [text] in document with id 'E0lsjW4BTdp_eLcgfhbu'看elasticsearch日志发现此时host为一个json对象，需要变为字符串才行

　　修改配置，添加过滤器，把host.name赋值为host

input{
   beats{
       port => 5044
   }
   #stdin {}
}

filter{
   mutate {
    rename => { "[host][name]" => "host" }
  }
}

output{
    elasticsearch{
    hosts => ["172.16.90.24:9200"]
    index => "logstash-%{+YYYY.MM.dd}"
    }
    stdout{
    codec => rubydebug
    }
}

　　再次使用docker启动logstash

docker run --rm -it -v /etc/logstash/conf.d/logstash.conf:/usr/share/logstash/pipeline/logstash.conf -v /etc/logstash/conf.d/logstash.yml:/usr/share/logstash/config/logstash.yml -p 5044:5044 docker.elastic.co/logstash/logstash:6.6.2

　　输出正常了 host字段也变成了字符串而不是json，可以正常输入至logstash