output插件是经过了input，然后过滤结构化数据之后，接下来我们需要借助output传到我们想传到的地方.output相当于一个输出管道。
Elasticsearch完整技术文档：https://yjoffer.com/springcloud/chapter6/chapter6.html
将采集数据标准输出到控制台
配置示例
output { stdout { codec => rubydebug } }Codec 来自 Coder/decoder
两个单词的首字母缩写，Logstash 不只是一个input | filter | output 的数据流，
而是一个input | decode | filter | encode | output 的数据流，codec 就是用来decode、encode 事件的。
简单说，就是在logstash读入的时候，通过codec编码解析日志为相应格式，从logstash输出的时候，通过codec解码成相应格式。
演示：
input {stdin{}} output { stdout { codec => rubydebug } }启动：bin/logstash -f /usr/local/elk/logstash-5.5.2/conf/template/stdout.conf
展示：
将采集数据保存到file文件中
需求：将数据采集到logstash的日志文件中，区分业务和采集日期（哪天采集的）
input {stdin{}} output { file { path => "/usr/local/elk/logstash-5.5.2/logs/stdout/mobile-collection/%{+YYYY-MM-dd}-%{host}.txt" codec => line { format => "%{message}" } gzip => true } }启动：
bin/logstash -f /usr/local/elk/logstash-5.5.2/conf/template/stdout_file.conf
结果展示：
将采集数据保存到Elasticsearch
Logstash可以直接将采集到的信息下沉到elasticsearch中
input {stdin{}} output { elasticsearch { hosts => ["hadoop01:9200"] index => "logstash-%{type}-%{+YYYY.MM.dd}" flush_size => 20000. #做批次执行，当数据量达到20000条以后，才会落地到es中 idle_flush_time => 10 #当时间达到10S ，我们就落地到es中 user => elastic password => changeme } }启动：bin/logstash -f /usr/local/elk/logstash-5.5.2/conf/template/stdout_es.conf
向控制台中输入6条数据：
192.168.77.1 - - [10/Apr/2018:00:44:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 505 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.2 - - [10/Apr/2018:00:45:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 460 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.3 - - [10/Apr/2018:00:46:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 510 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.4 - - [10/Apr/2018:00:47:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 112 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.5 - - [10/Apr/2018:00:48:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 455 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.6 - - [10/Apr/2018:00:49:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 653 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"然后在kibana上查看，是否logstash已经把数据采集到了elasticsearch
将采集的数据保存到redis
配置：
input { stdin {} } output { redis { host => "hadoop01" data_type => "list" port => "6379" db => 6 key => "logstash-redis-%{+yyyy.MM.dd}" batch=> true. #开启批处理 batch_events=> 10000 #批处理的大小 batch_timeout=> 3 #批处理的超时时间 #防止OOM---》list congestion_interval => 3 congestion_threhold => 100 } }启动redis
将数据打入logstash控制台：
192.168.77.1 - - [10/Apr/2018:00:44:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 505 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.2 - - [10/Apr/2018:00:45:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 460 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.3 - - [10/Apr/2018:00:46:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 510 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.4 - - [10/Apr/2018:00:47:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 112 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.5 - - [10/Apr/2018:00:48:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 455 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36" 192.168.77.6 - - [10/Apr/2018:00:49:11 +0800] "POST /api/metrics/vis/data HTTP/1.1" 200 653 "http://hadoop01/app/kibana" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"去redis上做认证，查看是否已经存储redis中：
查看数据:
