ELK學習筆記之ELK分析syslog日誌

0x00 配置FIlebeat蒐集syslog併發送至

#配置
mv /etc/filebeat/filebeat.yml  /etc/filebeat/filebeat.yml.bak
vim /etc/filebeat/filebeat.yml
filebeat.prospectors:
- type: log
  enabled: true
  paths:
    - /var/log/messages
  fields：
    log_topics: syslog-1.202
  max_bytes: 1048576
 
output.logstash:
  hosts: ["127.0.0.1:5044"]
 
#啓動
systemctl start filebea

0x01 配置Logstash從FIlebeat輸入syslog日誌並輸出至Elasticsearch

#配置從beat 5044端口接收日誌，且根據fields建立日誌索引
vim /etc/logstash/conf.d/syslog.conf
input {
   beats {
    port => 5044
  }
}
 
output {
 if[fields][log_topics] == "syslog-1.202" {
  elasticsearch {
    hosts => ["192.168.1.202:9200"]
    index => "syslog-1.202-%{+YYYY.MM}"
  }
 }
}
 
#啓動服務
systemctl start logstash

0x02 Troubleshooting

#日誌排查
tailf /var/log/logstash/logstash-plain.log  
tailf /var/log/filebeat/filebeat   
 
#配置文件語法合規性排查
/usr/share/logstash/bin/logstash --path.settings /etc/logstash -f /etc/logstash/conf.d/syslog.conf --config.test_and_exit
/usr/share/filebeat/bin/filebeat -c /etc/filebeat/filebeat.yml 

0x03 ElasticSearch查看索引

#查看索引
curl http://192.168.1.202:9200/_cat/indices?v  
health status index                uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   .kibana              sdsMVkoKQZaZncZf6OXEeg   1   0          1            0      3.7kb          3.7kb
yellow open   syslog-1.202-2018.03 0JDgsgabR16EozrEhVHosA   5   1          4            0     31.5kb         31.5kb
 
#清空無用索引
curl -XDELETE http://192.168.1.202:9200/+索引名

0x04 Kibana創建索引