一、简介:
ELK是三个开源软件的缩写,分别表示:Elasticsearch , Logstash, Kibana
1、Elasticsearch是个开源分布式搜索引擎,提供搜集、分析、存储数据三大功能。
它的特点有:分布式,零配置,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。
2、Logstash 主要是用来日志的搜集、分析、过滤日志的工具,支持大量的数据获取方式。
一般工作方式为c/s架构,client端安装在需要收集日志的主机上,server端负责将收到的各节点日志进行过滤、修改等操作在一并发往elasticsearch上去。
3、Kibana可以为 Logstash 和 ElasticSearch 提供的日志分析友好的 Web 界面,可以帮助汇总、分析和搜索重要数据日志。
4、FileBeat,它是一个轻量级的日志收集处理工具(Agent),Filebeat占用资源少,适合于在各个服务器上搜集日志后传输给Logstash,官方也推荐此工具。
二、环境准备 1、本地DNS解析 cat /etc/hosts 192.168.100.100 node1.stu.com 192.168.100.10 node2.stu.com 2、文件描述符 /etc/systemd/system.conf /etc/systemd/user.conf DefaultLimitNOFILE=65536 DefaultLimitNPROC=65536 3、时间同步 yum install ntpdate -y */5 * * * * /usr/sbin/ntpdate ntp.aliyun.com 三、ELASTICSEARCH 1、安装: yum install -y java-1.8.0-openjdk wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.4.0.rpm rpm -ivh elasticsearch-6.4.0.rpm 2、配置 vim /etc/elasticsearch/elasticsearch.yml cluster.name: elk-cluster node.name: node1 path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch bootstrap.memory_lock: true LimitMEMLOCK=infinity network.host: 192.168.100.100 http.port: 9200 discovery.zen.ping.unicast.hosts: ["192.168.100.100", "192.168.100.10"] bootstrap.memory_lock: true 服务启动的时候锁定足够的内存,防止数据写入swap LimitMEMLOCK=infinity(无限) 与集群中其他节点的传输端口为9300,接受HTTP请求的端口为9200 vim /etc/elasticsearch/jvm.options -Xms1g -Xmx1g systemctl start elasticsearch systemctl enable elasticsearch 3、测试 http://192.168.100.1:9200/ 四、logstash 1、安装: yum install java-1.8.0-openjdk.x86_64 -y wget https://artifacts.elastic.co/downloads/logstash/logstash-6.4.0.rpm rpm -ivh logstash-6.4.0.rpm 2、配置 搜集系统内核日志:chmod 644 /var/log/messages vim /etc/logstash/conf.d/syslog.conf input { file { path => "/var/log/messages" type => "systemlog" start_position => "beginning" stat_interval => "2" } } output { elasticsearch { hosts => ["192.168.100.100:9200"] index => "logstash-systemlog-%{+YYYY.MM.dd}" } } 检查配置文件语法是否错误:/usr/share/logstash/bin/logstash -tf /etc/logstash/conf.d/syslog.conf systemctl start logstash systemctl enable logstash 3、验证:curl -XGET 'localhost:9600/?pretty' 9600端口:API来检索有关Logstash的运行时指标 五、kibana 1、安装: rpm -ivh kibana-6.4.0-x86_64.rpm 2、配置 vim /etc/kibana/kibana.yml server.port: 5601 server.host: "192.168.100.100" elasticsearch.url: "http://192.168.100.100:9200" systemctl start kibana systemctl enable kibana 3、验证 http://192.168.100.100:5601/status 4、nginx+kibana http { log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; include /etc/nginx/conf.d/*.conf; server { listen 80; server_name kibana.stu.com; auth_basic "kibana auth password"; auth_basic_user_file /etc/nginx/kibana.auth; #root /usr/share/nginx/html; include /etc/nginx/default.d/*.conf; location / { proxy_pass http://kibana; } } upstream kibana { server 192.168.100.1:5601 weight=1 max_fails=2 fail_timeout=2; } }