平台centos7.4_x86_64
ELK由Elasticsearch、Logstash和Kibana三部分组件组成；
Elasticsearch是个开源分布式搜索引擎，特点：分布式，自动发现，索引自动分片，索引副本机制，restful风格接口，多数据源，自动搜索负载等。
Logstash是一个完全开源的工具，可对日志进行收集、分析，并将过滤后的数据转给Elasticsearch使用
kibana 是一个开源和免费的工具，它可以为 Logstash 和 ElasticSearch 提供友好的web可视化界面，帮助您汇总、分析和搜索重要数据日志。
beats是开源的轻量级数据传输组件，面向简单明确的数据传输场景，可将数据传输给Logstash 和 ElasticSearch，安装在采集端
X-Pack是Elastcsearch的扩展插件，包括基于用户的安全管理、集群监控告警、数据报表导出、图探索，需分别在Elasticsearch和kibana节点安装，X-Pack是付费的。
常用于对应用产生的日志进行收集、整理、展示。
若想快速上手尝试下ELK，本文能帮到你
最简单的ELK架构 filebeat --> elasticsearch --> kibana
ELK服务器上安装elasticsearch+kibna,其他产生日志的服务器上安装filebeat
1，elasticsearch安装
yum install -y java-1.8.0
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.0.1.rpm
rpm -ivh elasticsearch-6.0.1.rpm
vi /etc/elasticsearch/elasticsearch.yml
cluster.name: my-app
node.name: elk-1
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 0.0.0.0
http.port: 9200
systemctl daemon-reload
systemctl enable elasticsearch
systemctl restart elasticsearch
systemctl status elasticsearch
http://10.31.44.167:9200 若能看到文字最后'for search, you know'，即启动成功
2，kibana安装
wget https://artifacts.elastic.co/downloads/kibana/kibana-6.0.1-x86_64.rpm
rpm -ivh kibana-6.0.1-x86_64.rpm
vi /etc/kibana/kibana.yml
server.port: 5601
server.host: "0.0.0.0"
elasticsearch.url: "http://localhost:9200"
kibana.index: ".kibana"
systemctl enable kibana
systemctl start kibana
systemctl status kibana
3，客户端 filebeat安装
curl -L -O https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-6.0.1-x86_64.rpm
rpm -ivh filebeat-6.0.1-x86_64.rpm
vi /etc/filebeat/filebeat.yml
filebeat.prospectors:
- type: log
enabled: true
paths:
- /var/log/nginx/*.log
filebeat.config.modules:
path: ${path.config}/modules.d/*.yml
reload.enabled: false
setup.template.settings:
index.number_of_shards: 3
tags: [webA]
setup.kibana:
host: "10.31.44.167:5601"
output.elasticsearch:
hosts: ["10.31.44.167:9200"]
systemctl enable filebeat
systemctl start filebeat
systemctl status filebeat
管理地址：http://10.31.44.167:5601
如图，将默认的logstash-*改为filebeat-*，create
选择左边栏‘discovery’即可看到收集的日志展示
完整的ELK是：filebeat --> logstash --> elasticsearch --> kibana
filebeat配置
filebeat.prospectors:
- type: log
enabled: true
paths:
- /var/log/nginx/*.log
filebeat.config.modules:
path: ${path.config}/modules.d/*.yml
reload.enabled: false
setup.template.settings:
index.number_of_shards: 3
tags: [webA]
output.logstash:
hosts: ["10.31.44.167:5044"]
logstash配置
input {
beats {
port => 5044
}
}
output{
elasticsearch {
hosts => ["10.31.44.167:9200"]
index => "test"
}
}
随后需在kibana上index pattern里添加logstash里配置的index名称beat，查看到对应的日志记录即success
为保证安全可将filebeat和logstash之间的传输加密，方法如下:
用openssl分别在filebeat和logstash上的当前目录下生成证书
openssl req -subj '/CN=10.31.44.167/' -days $((100*365)) -batch -nodes -newkey rsa:2048 -keyout ./filebeat.key -out ./filebeat.crt
将生成的证书放到/etc/pki/tls/certs/
最后将crt证书相互放到filebeat和logstash上
filebeat配置
tls:
## logstash server 的自签名证书。
certificate_authorities: ["/etc/pki/tls/certs/logstash.crt"]
certificate: "/etc/pki/tls/certs/filebeat.crt"
certificate_key: "/etc/pki/tls/private/filebeat.key"
logstash配置
input {
beats {
port => 5044
ssl => true
ssl_certificate_authorities => ["/etc/pki/tls/certs/filebeat.crt"]
ssl_certificate => "/etc/pki/tls/certs/logstash.crt"
ssl_key => "/etc/pki/tls/private/logstash.key"
ssl_verify_mode => "force_peer"
}
}