场景：生产环境可集中式分析特定日志，便于管理，以及快速解决程序问题等。
常见：nginx、apache的访问日志，错误日志 catalina.out日志等。可以把错误日志提取出并解决。
安装方式：
1）编译安装 常用组合 ELK+Reids+插件
1.1）优点：方便管理
1.2）缺点：需要手动安装配置，相对yum繁琐
2）yum安装
2.1）优点：安装配置方便
2.2）缺点：相对编译不太好管理（依赖关系等因素）
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My eg：
注意事项：elk安装比较简单，但是要注意最低配置。这里我个人用的是编译安装，并且自己写的脚本。yum安装脚本可直接用。
[root@elk config]# /etc/init.d/node-elasticsearch status
node(elasticsearch) is running...
[root@elk config]# /etc/init.d/elasticsearch status
elasticsearch is already running...
[root@elk config]# Java -version
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)
[root@elk config]# /etc/init.d/kibana status
kibana is running...
[root@elk config]#
注意地方：
elasticsearch.yml：
[root@elk config]# cat elasticsearch.yml|grep -v"$^"|grep -v "#"
cluster.name: elk
node.name: node1
network.host: 0.0.0.0
http.port: 9200
http.cors.enabled: true
http.cors.allow-origin: "*"
[root@elk config]#
#elasticsearch配置允许跨域访问，这样head插件可以访问es。
#http.cors.enabled: true
#http.cors.allow-origin: "*"
kibana.yml ：
[root@elk config]# cat kibana.yml |grep elasticsearch.url
#elasticsearch.url: “:9200”
elasticsearch.url: “:9200”
#url访问
logstash获取日志样板：（重点）
[root@elk config]#
[root@elk config]# cat catalinalog.conf
input {
file {
path => "/usr/local/tomcat-7.x/logs/catalina.out" #tomcat的Catalina.out日志路径
start_position => "beginning"
}
}
filter {
if [path] =~ "access" {
mutate { replace => { "type" => "tomcat catalina.out" } }
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch {
hosts => ["192.168.1.225:9200"] #elasticsearch地址
}
stdout { codec => rubydebug }
}
[root@elk config]#
启动：logstash -f catalinalog.conf （测试）
kibana访问：
摘取tomcat最后启动成功状态日志：
January 11th 2017, 15:39:52.990path:/usr/local/tomcat-7.x/logs/catalina.out @timestamp:January 11th 2017, 15:39:52.990 @version:1 host:0.0.0.0 message:信息: Destroying ProtocolHandler ["ajp-bio-8009"] tags: _id:AVmMeAegJ7ojQvedm4_L _type:logs _index:logstash-2017.01.11 _score: -
January 11th 2017, 15:39:52.989path:/usr/local/tomcat-7.x/logs/catalina.out @timestamp:January 11th 2017, 15:39:52.989 @version:1 host:0.0.0.0 message:信息: Stopping ProtocolHandler ["ajp-bio-8009"] tags: _id:AVmMeAegJ7ojQvedm4_H _type:logs _index:logstash-2017.01.11 _score: -
January 11th 2017, 15:39:52.989path:/usr/local/tomcat-7.x/logs/catalina.out @timestamp:January 11th 2017, 15:39:52.989 @version:1 host:0.0.0.0 message:信息: Stopping ProtocolHandler ["http-bio-80"] tags: _id:AVmMeAegJ7ojQvedm4_F _type:logs _index:logstash-2017.01.11 _score: -
基于CentOS 6.9搭建ELK环境指南