ELK系列六：Logstash的Filter模块

Date过滤

---

input {
	stdin{
		codec => plain
	}
}

filter {
	date {
		match => ["message", "yyyy-MM-dd HH:mm:ss"]
		target => "@timestamp"
	}
}

output{
	stdout{
		codec => rubydebug{

		}
	}
}

# target是覆盖写那个目标字段
# match 是匹配什么样子的
# 注意时区的时差 

正在表达式grok

input {
	stdin{
		codec => plain
	}
}

filter {
	grok {
		match => {"message" => "dddddd"}
	}
}

output{
	stdout{
		codec => rubydebug{

		}
	}
}

# 输出的数据类型转换(Number目前只支持float和int)：
filter {
    grok {
        match => {
            "message => "%{WORD} %{NUMBER:newdata:float} %{WORD}"
        }
    }
}

#  重写字段：
overwrite => ["message"] 

input {
	stdin{
		codec => plain
	}
}

filter {
	grok {
		match => {"message" => "%{WORD:message:text} %{NUMBER:data:float}"}
		overwrite => ["message"]
	}
}

output{
	stdout{
		codec => rubydebug{

		}
	}
}

GeoIP地址查询

---

filter {
    geoip {
        source => "message"
    }
}

JSON编码

---

filter{
    json {
        source => "message"
        target => "jsoncontent"
    }    
}

key-value切分

---

input {
	stdin{
		codec => plain
	}
}

filter {
	kv {
		source => "message"
		include_keys => ["name","ip","level"]
		target => warnning
	}
}

output{
	stdout{
		codec => rubydebug{

		}
	}
}

数据修改

---

#总格式
filter {
    mutate {
        ...
    }
}
#1、字符串处理
mudate {
    gsub => ["xxx", "yyy","zzz"] #替换xxx字段中的yyy为zzz
    split => ["xxx","yyy"] #把xxx字段按照yyy字符分割
    join => ["xxx","yyy"] #把xxx字段按照yyy组装，之前分割的东西，用yyy作为分隔符，组装到一起
    merge => ["xxx","yyy"] #合并xxx和yyy字段
    strip => ["xxx"] #去掉xxx字段的前后空格
    lowercase/uppercase => xxx #小写/大写
    rename => ["xxx"，"yyy"] #xxx字段的名字换成yyy
    update => ["xxx","xxx"] #更新字段，字段不存在不新建
    replace => ["xxx","yyy"] #更新字段，字段不存在则新建
}