本文主要是介绍Linux部署Logstash，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

1 下载

[root@localhost ~]# cd /home/elk

1.1 ELK7.8.1

[root@localhost elk]# wget https://artifacts.elastic.co/downloads/logstash/logstash-7.8.1.tar.gz
[root@localhost elk]# wget https://artifacts.elastic.co/downloads/kibana/kibana-7.8.1-linux-x86_64.tar.gz
[root@localhost elk]# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.8.1-linux-x86_64.tar.gz

1.2 ELK 7.6.2

[root@localhost elk]# wget https://artifacts.elastic.co/downloads/logstash/logstash-7.6.2.tar.gz
[root@localhost elk]# wget https://artifacts.elastic.co/downloads/kibana/kibana-7.6.2-linux-x86_64.tar.gz
[root@localhost elk]# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.2-linux-x86_64.tar.gz

2 Logstash安装

2.1 解压

[root@localhost elk]# tar -zxvf logstash-7.8.1.tar.gz -C /home/elk/
[root@localhost elk]# cd logstash-7.8.1/

2.2 修改配置

2.2.1 jvm.options调整内存大小

[root@localhost logstash-7.8.1]# vi config/jvm.options

#-Xms1g
#-Xmx1g
-Xms512m
-Xmx512m

2.2.2 logstash.yml配置远程访问

[root@localhost elasticsearch-7.8.1]# vi config/logstash.yml

注意：是 Metrics Settings 下的 http.host。

# ------------ Metrics Settings --------------
#
# Bind address for the metrics REST endpoint
#
# http.host: "127.0.0.1"
http.host: "0.0.0.0"
#
# Bind port for the metrics REST endpoint, this option also accept a range
# (9600-9700) and logstash will pick up the first available ports.
#
# http.port: 9600-9700

2.2.3 查询Kafka的订阅Topic

#使用kafka-topics.sh创建topic
[root@localhost kafka]# docker exec -it kafka_kafka_1 /bin/bash
bash-4.4# cd bin/
bash-4.4# kafka-topics.sh --create --zookeeper 192.168.56.13:2181 --replication-factor 1 --partitions 1 --topic springboot-lifecycle

#容器启动的kafka，查看kafka的topic列表
[root@localhost kafka]# docker exec -it kafka_kafka_1 /bin/bash
bash-4.4# cd bin/
bash-4.4# kafka-topics.sh --zookeeper 192.168.56.13:2181 --list
gsdss-boss
gsdss-test
bash-4.4# exit
exit
[root@localhost kafka]# 

2.2.4 创建通道

[root@localhost logstash-7.8.1]# vi bin/logstash.conf

input {
	kafka {
		type => "gsdss-test"
		id => "gsdss-test"
		bootstrap_servers => ["192.168.56.13:9092"]
		topics => ["gsdss-test"]
		auto_offset_reset => "latest"
	} 
	
	kafka {
		type => "springboot-lifecycle"
		id => "springboot-lifecycle"
		bootstrap_servers => ["192.168.56.13:9092"]
		topics => ["springboot-lifecycle"]
		auto_offset_reset => "latest"
	} 
}


filter{
	if [type] == "springboot-lifecycle" {
		grok{
			match => {
			  "message" => "%{TIMESTAMP_ISO8601:logTime} %{GREEDYDATA:logThread} %{LOGLEVEL:logLevel} %{GREEDYDATA:loggerClass} - %{GREEDYDATA:logContent}"
			}
		}
	}
}


output {
	if [type] == "gsdss-test" {
		elasticsearch {
			hosts => ["192.168.56.13:9200", "192.168.56.13:9201", "192.168.56.13:9202"]
			index => "gsdss-test-%{+YYYY.MM.dd}"
		}	
	}
	if [type] == "springboot-lifecycle" {
		elasticsearch {
			hosts => ["192.168.56.13:9200", "192.168.56.13:9201", "192.168.56.13:9202"]
			index => "springboot-lifecycle-%{+YYYY.MM.dd}"
		}	
	}
}

2.3 启动

#后台启动
[root@localhost logstash-7.8.1]# nohup ./bin/logstash -f ./bin/logstash.conf &
#查看控制台
[root@localhost logstash-7.8.1]# tail -f nohup.out

#关闭，通过发送SIGTERM给Logstash进程来停止它
[root@localhost logstash-7.8.1]# kill -TERM {logstash_pid}

2.4 访问

浏览器请求http://192.168.56.13:9600

{
    "host":"localhost.localdomain",
    "version":"7.8.1",
    "http_address":"0.0.0.0:9600",
    "id":"19b40881-c2f0-4e21-8ef5-74446632ea98",
    "name":"localhost.localdomain",
    "ephemeral_id":"b1cf5bed-14c4-4cf1-90d5-4b3b437e8656",
    "status":"green",
    "snapshot":false,
    "pipeline":{
        "workers":2,
        "batch_size":125,
        "batch_delay":50
    },
    "build_date":"2020-07-21T19:19:46+00:00",
    "build_sha":"5dcccb963be4c163647232fe4b67bdf4b8efc2cb",
    "build_snapshot":false
}

2.5解决es分片不足

若出现以下问题，表示elasticsearch分片不足，原因是elasticsearch7以上版本，默认只允许1000个分片，问题是因为集群分片数不足引起的：

[2020-08-18T09:44:48,529][WARN ][logstash.outputs.elasticsearch][main] Could not index event to Elasticsearch. {:status=>400, :action=>["index", {:_id=>nil, :_index=>"gsdss-boss-2020.08.18", :routing=>nil, :_type=>"_doc"}, #<LogStash::Event:0x16168ab8>], :response=>{"index"=>{"_index"=>"gsdss-boss-2020.08.18", "_type"=>"_doc", "_id"=>nil, "status"=>400, "error"=>{"type"=>"validation_exception", "reason"=>"Validation Failed: 1: this action would add [2] total shards, but this cluster currently has [1243]/[1000] maximum shards open;"}}}}

解决办法：
修改集群对分片数量的设置，使用Head插件或者Kiabana的Dev Tools 执行如下命令：

PUT /_cluster/settings
{
  "transient": {
    "cluster": {
      "max_shards_per_node":10000
    }
  }
}
或者：
[root@elk logstash-7.8.1]# curl -XPUT -H "Content-Type:application/json" http://172.18.56.13:9200/_cluster/settings -d '{"transient":{"cluster":{"max_shards_per_node":10000}}}'

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