一、Kibana安装
Kibana 是为 Elasticsearch 设计的开源分析和可视化平台。你可以使用 Kibana 来搜索，查看存储在 Elasticsearch 索引中的数据并与之交互。你可以很容易实现高级的数据分析和可视化，以图表的形式展现出来。
kiabana下载地址：https://artifacts.elastic.co/downloads/kibana/kibana-6.0.0-x86_64.rpm[root@linux-node1 ~]# wget https://artifacts.elastic.co/downloads/kibana/kibana-6.0.0-x86_64.rpm[root@linux-node1 ~]# yum install -y kibana-6.0.0-x86_64.rpm [root@linux-node1 ~]# vim /etc/kibana/kibana.yml [root@linux-node1 ~]# grep "^[a-Z]" /etc/kibana/kibana.yml server.port: 5601 #监听端口server.host: "192.168.56.11" #监听IP地址，建议内网ipelasticsearch.url: "http://192.168.56.11:9200" #elasticsearch连接kibana的URL，也可以填写192.168.56.12，因为它们是一个集群[root@linux-node1 ~]# systemctl enable kibanaCreated symlink from /etc/systemd/system/multi-user.target.wants/kibana.service to /etc/systemd/system/kibana.service.[root@linux-node1 ~]# systemctl start kibana监听端口为：5601[root@linux-node1 ~]# ss -tnlState Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 *:9100 *:* LISTEN 0 128 *:22 *:* LISTEN 0 100 127.0.0.1:25 *:* LISTEN 0 128 192.168.56.11:5601 *:* LISTEN 0 128 ::ffff:192.168.56.11:9200 :::* LISTEN 0 128 ::ffff:192.168.56.11:9300 :::* LISTEN 0 128 :::22 :::* LISTEN 0 100 ::1:25 :::* LISTEN 0 80 :::3306 :::*
浏览器访问192.168.56.11:5601，如图：
可以通过http://192.168.56.11:5601/status 来查看看是否正常，如果不正常，是无法进入到上图界面
二、通过配置logstash文件收集message日志
1、Kibana展示上一节的日志
在Kibana上展示上一节收集的日志信息，添加索引，如图：
点击“discover”查看收集的信息，如图：
2、使用logstash配置文件收集messages日志
编辑logstash的配置文件：[root@linux-node1 ~]# vim /etc/logstash/conf.d/system.confinput { file { path => "/var/log/messages" #日志路径 type => "systemlog" #类型 start_position => "beginning" #logstash 从什么位置开始读取文件数据，默认是结束位置，也就是说 logstash 进程会以类似 tail -F 的形式运行。如果你是要导入原有数据，把这个设定改成"beginning"，logstash 进程就从头开始读取，类似 less +F 的形式运行。 stat_interval => "2" #logstash 每隔多久检查一次被监听文件状态（是否有更新） ，默认是 1 秒。 }}output { elasticsearch { hosts => ["192.168.56.11:9200"] #指定hosts index => "logstash-systemlog-%{+YYYY.MM.dd}" #索引名称 }}[root@linux-node1 ~]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/system.conf -t #检测配置文件是否有语法错误OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=NWARNING: Could not find logstash.yml which is typically located in $LS_HOME/config or /etc/logstash. You can specify the path using --path.settings. Continuing using the defaultsCould not find log4j2 configuration at path /usr/share/logstash/config/log4j2.properties. Using default config which logs errors to the consoleConfiguration OK[root@linux-node1 ~]# ll /var/log/messages -rw-------. 1 root root 791209 12月 27 11:43 /var/log/messages#这里可以看到该日志文件是600权限，而elasticsearch是运行在elasticsearch用户下，这样elasticsearch是无法收集日志的。所以这里需要更改日志的权限，否则会报权限拒绝的错误。在日志中查看/var/log/logstash/logstash-plain.log 是否有错误。[root@linux-node1 ~]# chmod 644 /var/log/messages [root@linux-node1 ~]# systemctl restart logstash 在管理界面查看是否有相应的索引（logstash-systemlog-2017.12.27），如图：
添加到Kibana中展示,创建索引：
查看日志
三、使用一个配置文件收集多个日志
修改logstash的配置文件，这里增加收集数据库mariadb的日志：[root@linux-node1 ~]# vim /etc/logstash/conf.d/system.conf input { file { path => "/var/log/messages" type => "systemlog" start_position => "beginning" stat_interval => "2" } file { path => "/var/log/mariadb/mariadb.log" type => "mariadblog" start_position => "beginning" stat_interval => "2" }}output { if [type] == "systemlog" { #使用if来判断类型，并输出到elasticsearch和file，展示一个out可以作多样输出 elasticsearch { hosts => ["192.168.56.11:9200"] index => "logstash-systemlog-%{+YYYY.MM.dd}" } file { path => "/tmp/logstash-systemlog-%{+YYYY.MM.dd}" }} if [type] == "mariadblog" { elasticsearch { hosts => ["192.168.56.11:9200"] index => "logstash-mariadblog-%{+YYYY.MM.dd}" } file { path => "/tmp/logstash-mariadblog-%{+YYYY.MM.dd}" }}}配置文件检测语法是否正常：[root@linux-node1 ~]# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/system.conf -tOpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=NWARNING: Could not find logstash.yml which is typically located in $LS_HOME/config or /etc/logstash. You can specify the path using --path.settings. Continuing using the defaultsCould not find log4j2 configuration at path /usr/share/logstash/config/log4j2.properties. Using default config which logs errors to the consoleConfiguration OK重启logstash：[root@linux-node1 ~]# systemctl restart logstash修改mariadb的日志权限：[root@linux-node1 ~]# ll /var/log/mariadb/ -ddrwxr-x--- 2 mysql mysql 24 12月 4 17:43 /var/log/mariadb/[root@linux-node1 ~]# chmod 755 /var/log/mariadb/[root@linux-node1 ~]# ll /var/log/mariadb/mariadb.log -rw-r----- 1 mysql mysql 114993 12月 27 14:23 /var/log/mariadb/mariadb.log[root@linux-node1 ~]# chmod 644 /var/log/mariadb/mariadb.log 通过head插件查看：
查看是否在/tmp下收集到了日志数据 [root@linux-node1 ~]# ll /tmp/logstash-*-rw-r--r-- 1 logstash logstash 288449 12月 27 14:27 /tmp/logstash-mariadblog-2017.12.27-rw-r--r-- 1 logstash logstash 53385 12月 27 14:28 /tmp/logstash-systemlog-2017.12.27
Kibana创建索引：
