一、准备

我这边有一个网站放在了 Google VM 上面，所以打算在购买一台服务器安装 ELK 来处理分析 nginx 的访问日志。

• 操作系统版本：CentOS 7
• ELK版本：7.1

1.1、服务器环境准备

我们这里还是采用官方的 yum 源进行安装，简单省事，首先配置官方 yum 仓库。

rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch

cat >> /etc/yum.repos.d/elasticsearch.repo <

关闭防火墙。

systemctl stop firewalld.servicesystemctl disable firewalld.service

二、安装 ES

Elasticsearch 的软件包自带一个版本的 OpenJDK，所以我们这里不需要单独去安装 JDK 了，直接使用官方的就行。

yum install elasticsearch -y

因为默认是监听 IP 是127.0.0.1，我们需要开启配置文件/etc/elasticsearch/elasticsearch.yml的一个参数network.host，写上自己的本地IP即可。

2.1、遇到小问题

如此修改了一下配置文件之后，我发现无法启动了，日志也没有看到什么错误，我就手动执行查看问题。

[root@elk ~]# su - elasticsearch -s /bin/sh -c "/usr/share/elasticsearch/bin/elasticsearch"su: warning: cannot change directory to /nonexistent: No such file or directoryOpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.[2019-05-31T03:20:42,902][INFO ][o.e.e.NodeEnvironment    ] [elk] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [7.7gb], net total_space [9.9gb], types [rootfs][2019-05-31T03:20:42,908][INFO ][o.e.e.NodeEnvironment    ] [elk] heap size [990.7mb], compressed ordinary object pointers [true].................................[2019-05-31T03:20:50,083][INFO ][o.e.x.s.a.s.FileRolesStore] [elk] parsed [0] roles from file [/etc/elasticsearch/roles.yml][2019-05-31T03:20:50,933][INFO ][o.e.x.m.p.l.CppLogMessageHandler] [elk] [controller/5098] [Main.cc@109] controller (64 bit): Version 7.1.1 (Build fd619a36eb77df) Copyright (c) 2019 Elasticsearch BV[2019-05-31T03:20:51,489][DEBUG][o.e.a.ActionModule       ] [elk] Using REST wrapper from plugin org.elasticsearch.xpack.security.Security[2019-05-31T03:20:51,881][INFO ][o.e.d.DiscoveryModule    ] [elk] using discovery type [zen] and seed hosts providers [settings][2019-05-31T03:20:53,019][INFO ][o.e.n.Node               ] [elk] initialized[2019-05-31T03:20:53,020][INFO ][o.e.n.Node               ] [elk] starting ...[2019-05-31T03:20:53,178][INFO ][o.e.t.TransportService   ] [elk] publish_address {10.154.0.3:9300}, bound_addresses {10.154.0.3:9300}[2019-05-31T03:20:53,187][INFO ][o.e.b.BootstrapChecks    ] [elk] bound or publishing to a non-loopback address, enforcing bootstrap checksERROR: [2] bootstrap checks failed[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535][2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured[2019-05-31T03:20:53,221][INFO ][o.e.n.Node               ] [elk] stopping ...[2019-05-31T03:20:53,243][INFO ][o.e.n.Node               ] [elk] stopped[2019-05-31T03:20:53,244][INFO ][o.e.n.Node               ] [elk] closing ...[2019-05-31T03:20:53,259][INFO ][o.e.n.Node               ] [elk] closed[2019-05-31T03:20:53,264][INFO ][o.e.x.m.p.NativeController] [elk] Native controller process has stopped - no new native processes can be started

我们可以看到下面的两个错误，一个是说最大文件打开数比较小，一个说还必须开启一个 discovery 设置，那我们分别操作一下。

#临时修改，立刻生效ulimit -n 655350         #永久修改echo "* soft nofile 655360" >> /etc/security/limits.confecho "* hard nofile 655360" >> /etc/security/limits.conf

我修改后的配置文件如下：

node.name: node-1path.data: /var/lib/elasticsearchpath.logs: /var/log/elasticsearchnetwork.host: 10.154.0.3cluster.initial_master_nodes: ["node-1", "node-2"]

然后我们就可以启动了。

systemctl daemon-reloadsystemctl enable elasticsearch.servicesystemctl start elasticsearch.service

访问一下页面。

{  "name" : "node-1",  "cluster_name" : "elasticsearch",  "cluster_uuid" : "P0GGZU9pRzutp-zHDZvYuQ",  "version" : {    "number" : "7.1.1",    "build_flavor" : "default",    "build_type" : "rpm",    "build_hash" : "7a013de",    "build_date" : "2019-05-23T14:04:00.380842Z",    "build_snapshot" : false,    "lucene_version" : "8.0.0",    "minimum_wire_compatibility_version" : "6.8.0",    "minimum_index_compatibility_version" : "6.0.0-beta1"  },  "tagline" : "You Know, for Search"}

三、安装 Kibana

为了节省机器资源，我们这里使用安装在一台机器上面，因为环境上面已经配置好，我们这里直接进行安装。

yum install kibana -y

编辑配置文件/etc/kibana/kibana.yml，修改如下内容：

server.port: 5601server.host: "10.154.0.3"elasticsearch.hosts: ["http://10.154.0.3:9200"]

启动服务。

systemctl daemon-reloadsystemctl enable kibana.servicesystemctl start kibana.service

访问画面正常显示即我们安装完成。

四、安装 Logstash

yum install logstash -y

创建配置文件/etc/logstash/conf.d/logstash.conf，增加如下内容：

input {  beats {    port => 5044  }}filter {  if [fields][type] == "nginx_access" {    grok {      match => { "message" => "%{NGINXACCESS}" }    }  }  if [fields][type] == "apache_access" {    grok {      match => { "message" => "%{COMBINEDAPACHELOG}" }    }  }    mutate {      remove_field =>["message"]    remove_field =>["host"]    remove_field =>["input"]    remove_field =>["prospector"]    remove_field =>["beat"]  }  geoip {    source => "clientip"  }  date {    match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]  }}output {  if [fields][type] == "nginx_access" {    elasticsearch {      hosts => "172.18.8.200:9200"      index => "%{[fields][type]}-%{+YYYY.MM.dd}"    }  }  if [fields][type] == "apache_access" {    elasticsearch {      hosts => "172.18.8.200:9200"      index => "%{[fields][type]}-%{+YYYY.MM.dd}"    }  }}

未完待续。。。

最终效果图如下：