ELK 部署环境准备
| 操作系统 | IP 地址 | 主机名 | 软件包 | 备注 |
| CentOS7.5 x86_64 | 192.168.200.111 | elk-node1 | 内存：2G | |
| CentOS7.5 x86_64 | 192.168.200.112 | elk-node2 | 内存：2G | |
| CentOS7.5 x86_64 | 192.168.200.113 | apache | 内存：1G |
创建多台 Elasticsearch 节点的目的是存放数据的多个副本，在实际生产环境中，节点的数量可能更多，另外本案例中，ELasticsearch 和 Kibana 集中部署在 Node1 节点上，也可以采用分布式部署，即 Logstash、Elasticsearch 和 Kibana 分别部署在不同的服务器上。
所有主机关闭防火墙和 selinux ，ELK-node 上配置名称解析。
systemctl stop firewalld
iptables -F
setenforce 0
vim /etc/hosts
192.168.200.111 elk-node1
192.168.200.112 elk-node2
因为 elasticsearch 服务运行需要 java 环境，因此 elasticsearch 服务器需要安装 java 环境。
[root@elk-node2 ~]# which java
/usr/bin/java
安装 elasticsearch 软件
官网下载地址：
https://www.elastic.co/cn/downloads/past-releases#elasticsearch
Elasticsearch 安装可以通过 YUM 安装、源码包安装，这里通过下载的 rpm 包进行安装，生产环境中你可以根据实际情况进行安装方式选择。2个节点都要做
[root@elk-node1 ~]# rpm -ivh elasticsearch-5.5.0.rpm
警告：elasticsearch-5.5.0.rpm: 头V4 RSA/SHA512 Signature, 密钥 ID d88e42b4: NOKEY
准备中... ################################# [100%]
Creating elasticsearch group... OK
Creating elasticsearch user... OK
正在升级/安装...
1:elasticsearch-0:5.5.0-1 ################################# [100%]
### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using systemd
sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service
### You can start elasticsearch service by executingsudo systemctl start elasticsearch.service
通过执行命令设置成系统服务并设置自动开机启动，2个节点都要做
[root@elk-node1 ~]# systemctl daemon-reload
[root@elk-node1 ~]# systemctl enable elasticsearch.service
Created symlink from /etc/systemd/system/multi-user.target.wants/elasticsearch.service to /usr/lib/systemd/system/elasticsearch.service.
更改 elasticsearch 主配置文件,2个节点都要做，该文件冒号后要加空格
[root@elk-node1 ~]# vim /etc/elasticsearch/elasticsearch.yml
17 cluster.name: my-elk-cluster #集群名字此处配置 node1 与 node2 必须相同
23 node.name: elk-node1 #节点名字（主机名）
33 path.data: /data/elk_data #数据存放路径
37 path.logs: /var/log/elasticsearch #日志存放路径
43 bootstrap.memory_lock: false #不在启动时锁定内存
55 network.host: 0.0.0.0 #提供服务绑定的 ip 地址，0.0.0.0 代表所有地址
59 http.port: 9200 #指定侦听端口
68 discovery.zen.ping.unicast.hosts: ["elk-node1","elk-node2"] #集群中的实例名
http.cors.enabled: true （末行追加）#开启跨区域传送
http.cors.allow-origin: "*" #跨区域访问允许的域名地址
注意 node1 此处不同于 node2，这两行只在第一台加就行
建数据存放路径并授权，2个节点都要做
[root@elk-node1 ~]# mkdir -p /data/elk_data
[root@elk-node1 ~]# chown elasticsearch:elasticsearch /data/elk_data/
启动 elasticsearch 并查看是否成功开启，2个节点都要做
[root@elk-node1 ~]# systemctl start elasticsearch.service
[root@elk-node1 ~]# netstat -lnpt | grep 9200
tcp6 0 0 :::9200 :::* LISTEN 2296/java
Elasticsearch 默认的对外服务的 HTTP 端口是 9200，节点间交互的 TCP 端口是 9300。
通过浏览器访问节点，可以看到节点信息情况。
[root@elk-node1 ~]# curl http://192.168.200.111:9200
{
"name" : "node-1",
"cluster_name" : "my-elk-cluster",
"cluster_uuid" : "Lee7JjuwRauhFwQW8B_MKA",
"version" : {
"number" : "5.5.0",
"build_hash" : "260387d",
"build_date" : "2017-06-30T23:16:05.735Z",
"build_snapshot" : false,
"lucene_version" : "6.6.0"
},
"tagline" : "You Know, for Search"
}
通过浏览器输入 http://192.168.200.111:9200/_cluster/health?pretty 查看集群的健康情况，
对 status 进行分析，green 就是运行正常，yellow 表示副本分片丢失，red 表示主分片丢失。
[root@elk-node1 ~]# curl http://192.168.200.111:9200/_cluster/health?pretty
{
"cluster_name" : "my-elk-cluster",
"status" : "green",
"timed_out" : false,
"number_of_nodes" : 1,
"number_of_data_nodes" : 1,
"active_primary_shards" : 0,
"active_shards" : 0,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0
}
通过浏览器输入 http://192.168.200.111:9200/_cluster/state?pretty 查看集群状态信息
[root@elk-node1 ~]# curl http://192.168.200.111:9200/_cluster/state?pretty
{
"cluster_name" : "my-elk-cluster",
"version" : 2,
"state_uuid" : "1YNobfqcS26YRcwQQlFnMg",
"master_node" : "ySyoHCKPTbq4PJRBQtU0SA",
"blocks" : { },
"nodes" : {
"ySyoHCKPTbq4PJRBQtU0SA" : {
"name" : "node-1",
"ephemeral_id" : "3XiPMmXjTSmuS38E8OY2qw",
"transport_address" : "192.168.200.111:9300",
"attributes" : { }
}
},
"metadata" : {
"cluster_uuid" : "Lee7JjuwRauhFwQW8B_MKA",
"templates" : { },
"indices" : { },
"index-graveyard" : {
"tombstones" : [ ]
}
},
"routing_table" : {
"indices" : { }
},
"routing_nodes" : {
"unassigned" : [ ],
"nodes" : {
"ySyoHCKPTbq4PJRBQtU0SA" : [ ]
}
}
}
安装 elasticsearch-head 插件
我们不可能经常通过命令或浏览器来查看集群的信息，所以就使用到了插件 -head。
Elasticsearch 在 5.0 版本后，elasticsearch-head（基于 Chrome V8 引擎的 JavaScript 运行环境）插件需要作为独立服务进行安装，需要 npm 命令。
两个节点都需要操作
安装node
官网下载地址：
https://nodejs.org/en/download/
[root@elk-node1 ~]# tar xf node-v8.2.1-linux-x64.tar.gz -C /usr/local/
[root@elk-node1 ~]# ln -s /usr/local/node-v8.2.1-linux-x64/bin/node /usr/bin/node
[root@elk-node1 ~]# ln -s /usr/local/node-v8.2.1-linux-x64/bin/npm /usr/local/bin/
[root@elk-node1 ~]# node -v
v8.2.1
[root@elk-node1 ~]# npm -v
5.3.0
安装 elasticsearch-head 作为独立服务并后台启动
这将启动运行在端口 9100 上的本地 web 服务器，该端口服务于 elasticsearch-head
[root@elk-node1 ~]# tar xf elasticsearch-head.tar.gz -C /data/elk_data/
[root@elk-node1 ~]# cd /data/elk_data/
[root@elk-node1 elk_data]# chown -R elasticsearch:elasticsearch elasticsearch-head/
[root@elk-node1 elk_data]# cd /data/elk_data/elasticsearch-head/
[root@elk-node1 elasticsearch-head]# npm install
#报错为正常现象，忽略即可。
[root@elk-node1 elasticsearch-head]# cd _site/
[root@elk-node1 _site]# pwd
/data/elk_data/elasticsearch-head/_site[root@elk-node1 _site]# cp app.js{,.bak}
[root@elk-node1 _site]# vim app.jsthis.base_uri = this.config.base_uri || this.prefs.get("app-base_uri") || "http://192.168.200.111:9200"; #更改为自身 IP
[root@elk-node1 _site]# npm run start &
[root@elk-node1 _site]# systemctl start elasticsearch.service
[root@elk-node1 _site]# netstat -lnpt | grep 9100
tcp 0 0 0.0.0.0:9100 0.0.0.0:* LISTEN 1480/grunt
通过浏览器进行访问：http://192.168.200.111:9100 并连接集群
可以通过命令插入一个测试索引，索引为 index-demo，类型为 test，可以看到成功创建。
[root@elk-node1 ~]# curl -XPUT 'localhost:9200/index-demo/test/1?pretty&pretty' -H 'Content-Type:application/json' -d '{"user":"zhangsan","mesg":"hello world"}'
{
"_index" : "index-demo",
"_type" : "test",
"_id" : "1",
"_version" : 1,
"result" : "created",
"_shards" : {
"total" : 2,
"successful" : 2,
"failed" : 0
},
"created" : true
}
刷新浏览器，可以看到创建成功的索引
安装 logstash
Logstash 一般部署在需要监控其日志的服务器中的。本案例中，Logstash 部署在 Apache 服务器上，用于搜集 Apache 服务器的日志信息并发送到 Elasticsearch 中。logstash 也需要 java 环境，所以也要检查当前机器的 java 环境是否存在。
在正式部署之前，先再 Node1 上部署 Logstash，以熟悉 Logstash 的使用方法。
在 elk-node1 上安装
[root@elk-node1 ~]# rpm -ivh logstash-5.5.1.rpm
警告：logstash-5.5.1.rpm: 头V4 RSA/SHA512 Signature, 密钥 ID d88e42b4: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:logstash-1:5.5.1-1 ################################# [100%]
Using provided startup.options file: /etc/logstash/startup.options
Successfully created system startup script for Logstash
[root@elk-node1 ~]# systemctl start logstash.service
[root@elk-node1 ~]# ln -s /usr/share/logstash/bin/logstash /usr/local/bin/
logstash 基本使用
logstash 使用管道方式进行日志的搜集处理和输出。有点类似 Linux 系统的管道命令 xxx | ccc | ddd，xxx 执行完了会执行 ccc ，然后执行 ddd。
在 logstash 中，包括了三个阶段；
输入 input --> 处理 filter（不是必须的）--> 输出 output
每个阶段都由很多的插件配合工作，比如 filebeat、elasticsearch、Redis 等等。
每个阶段也可以指定多种方式，比如输出既可以输出到 elasticsearch 中，也可以指定到 stdout 在控制台打印。
由于这种插件式的组织方式，使得 logstash 变得易于扩展和定制。
logstash 命令行中常用的命令
-f：通过这个命令可以指定 logstash 的配置文件，根据配置文件配置 logstash。
-e：后面跟着字符串，该字符串可以被当做 logstash 的配置（如果是 “” 则默认使用 stdin 作为输入，stdout 作为输出）
-t：测试配置文件是否正确，然后退出
启动一个 logstash -e: 在命令行执行；input 输入，stdin 标准输入，是一个插件；output输出，stdout 标准输出
[root@elk-node1 ~]# logstash -e 'input{stdin{}}output{stdout{}}'
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.
WARNING: 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 defaults
Could not find log4j2 configuration at path //usr/share/logstash/config/log4j2.properties. Using default config which logs to console
18:07:43.368 [main] INFO logstash.setting.writabledirectory - Creating directory {:setting=>"path.queue", :path=>"/usr/share/logstash/data/queue"}
18:07:43.391 [main] INFO logstash.setting.writabledirectory - Creating directory {:setting=>"path.dead_letter_queue", :path=>"/usr/share/logstash/data/dead_letter_queue"}
18:07:43.514 [LogStash::Runner] INFO logstash.agent - No persistent UUID file found. Generating new UUID {:uuid=>"0dfc709c-02e0-4486-b8f9-87d39279940c", :path=>"/usr/share/logstash/data/uuid"}
18:07:43.832 [[main]-pipeline-manager] INFO logstash.pipeline - Starting pipeline {"id"=>"main", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>125}
18:07:43.910 [[main]-pipeline-manager] INFO logstash.pipeline - Pipeline main started
The stdin plugin is now waiting for input:
18:07:44.109 [Api Webserver] INFO logstash.agent - Successfully started Logstash API endpoint {:port=>9600} #注意出现此行为成功上面报错忽略即可
www.baidu.com #手动输入
2020-05-11T10:08:03.327Z elk-node1 www.baidu.com
www.sina.com.cn #手动输入
2020-05-11T10:09:47.975Z elk-node1 www.sina.com.cn 完成后（Ctrl+C）退出即可
^C18:09:51.612 [SIGINT handler] WARN logstash.runner - SIGINT received. Shutting down the agent.
18:09:51.626 [LogStash::Runner] WARN logstash.agent - stopping pipeline {:id=>"main"}
使用 rubydebug 显示详细输出，codec 为一种编 xxx
[root@elk-node1 ~]# logstash -e 'input{stdin{}} output{stdout{codec=>rubydebug}}'
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.
WARNING: 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 defaults
Could not find log4j2 configuration at path //usr/share/logstash/config/log4j2.properties. Using default config which logs to console
18:16:53.950 [[main]-pipeline-manager] INFO logstash.pipeline - Starting pipeline {"id"=>"main", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>125}
18:16:54.017 [[main]-pipeline-manager] INFO logstash.pipeline - Pipeline main started
The stdin plugin is now waiting for input:
18:16:54.088 [Api Webserver] INFO logstash.agent - Successfully started Logstash API endpoint {:port=>9600}
www.baidu.com
{
"@timestamp" => 2020-05-11T10:17:08.349Z,
"@version" => "1",
"host" => "elk-node1",
"message" => "www.baidu.com"
}
www.sina.com.cn
{
"@timestamp" => 2020-05-11T10:17:16.354Z,
"@version" => "1",
"host" => "elk-node1",
"message" => "www.sina.com.cn"
}
^C18:17:19.317 [SIGINT handler] WARN logstash.runner - SIGINT received. Shutting down the agent.
18:17:19.328 [LogStash::Runner] WARN logstash.agent - stopping pipeline {:id=>"main"}
使用 logstash 将信息写入到 elasticsearch 中
[root@elk-node1 ~]# logstash -e 'input{stdin{}} output{ elasticsearch{hosts=>["192.168.200.111:9200"]}}'
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.
WARNING: 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 defaults
Could not find log4j2 configuration at path //usr/share/logstash/config/log4j2.properties. Using default config which logs to console
18:20:41.209 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - Elasticsearch pool URLs updated {:changes=>{:removed=>[], :added=>[http://192.168.200.111:9200/]}}
18:20:41.214 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - Running health check to see if an Elasticsearch connection is working {:healthcheck_url=>http://192.168.200.111:9200/, :path=>"/"}
18:20:41.411 [[main]-pipeline-manager] WARN logstash.outputs.elasticsearch - Restored connection to ES instance {:url=>#<Java::JavaNet::URI:0x5169c104>}
18:20:41.422 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - Using mapping template from {:path=>nil}
18:20:41.707 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - Attempting to install template {:manage_template=>{"template"=>"logstash-*", "version"=>50001, "settings"=>{"index.refresh_interval"=>"5s"}, "mappings"=>{"_default_"=>{"_all"=>{"enabled"=>true, "norms"=>false}, "dynamic_templates"=>[{"message_field"=>{"path_match"=>"message", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false}}}, {"string_fields"=>{"match"=>"*", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false, "fields"=>{"keyword"=>{"type"=>"keyword", "ignore_above"=>256}}}}}], "properties"=>{"@timestamp"=>{"type"=>"date", "include_in_all"=>false}, "@version"=>{"type"=>"keyword", "include_in_all"=>false}, "geoip"=>{"dynamic"=>true, "properties"=>{"ip"=>{"type"=>"ip"}, "location"=>{"type"=>"geo_point"}, "latitude"=>{"type"=>"half_float"}, "longitude"=>{"type"=>"half_float"}}}}}}}}
18:20:41.742 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - Installing elasticsearch template to _template/logstash
18:20:41.962 [[main]-pipeline-manager] INFO logstash.outputs.elasticsearch - New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>[#<Java::JavaNet::URI:0x2f3a7a0d>]}
18:20:41.965 [[main]-pipeline-manager] INFO logstash.pipeline - Starting pipeline {"id"=>"main", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>125}
18:20:42.030 [[main]-pipeline-manager] INFO logstash.pipeline - Pipeline main started
The stdin plugin is now waiting for input:
18:20:42.183 [Api Webserver] INFO logstash.agent - Successfully started Logstash API endpoint {:port=>9600}
www.baidu.com
www.sina.com.cn
www.google.com
^C18:21:38.742 [SIGINT handler] WARN logstash.runner - SIGINT received. Shutting down the agent.
18:21:38.756 [LogStash::Runner] WARN logstash.agent - stopping pipeline {:id=>"main"}
访问结果
logstash 配置文件使用
logstash 配置文件基本上由三部分组成，input、output 以及用户需要才添加的 filter，因此标准的配置文件格式如下：
input {...}
filter {...}
output {...}
在每个部分中，也可以指定多个访问方式，例如我想要指定两个日志来源文件，则可以这样写：
input {
file { path => "/var/log/messages" type =>"syslog"}
file { path => "/var/log/apache/access.log" type =>"apache"}
}
下面是一个收集系统日志的配置文件例子，将其放到 /etc/logstash/conf.d/目录中，logstash启动的时候便会加载。注意要给 logstash 读取日志文件的权限。
案例：配置收集系统日志
将 system.conf 放到 /etc/logstash/conf.d/目录中，logstash启动的时候便会加载
[root@elk-node1 ~]# cd /etc/logstash/conf.d/
[root@elk-node1 conf.d]# vim system.confinput {
file {
path => "/var/log/messages"
type => "system"
start_position => "beginning"
}
}
output {
elasticsearch {
hosts => ["192.168.200.111:9200"]
index => "system-%{+YYYY.MM.dd}"
}
}
访问查看
安装 Kibana
在 elk-node1 服务器上安装 Kibana，并设置开机启动。
[root@elk-node1 ~]# rpm -ivh kibana-5.5.1-x86_64.rpm
警告：kibana-5.5.1-x86_64.rpm: 头V4 RSA/SHA512 Signature, 密钥 ID d88e42b4: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:kibana-5.5.1-1 ################################# [100%]
[root@elk-node1 ~]# systemctl enable kibana.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kibana.service to /etc/systemd/system/kibana.service.
修改配置文件并启动服务
[root@elk-node1 ~]# vim /etc/kibana/kibana.yml
server.port: 5601
server.host: "0.0.0.0"
elasticsearch.url: "http://192.168.200.111:9200"
kibana.index: ".kibana"
[root@elk-node1 ~]# systemctl start kibana.service
[root@elk-node1 ~]# netstat -lnpt | grep 5601
tcp 0 0 0.0.0.0:5601 0.0.0.0:* LISTEN 12140/node
使用浏览器访问测试
http://192.168.200.111:5601
注意上面有一个报错，需要创建一个默认分区
单击 Discover 按钮查看图表信息及日志信息
鼠标指针悬停在“Avbie Fields”中的 host，然后单击 add 按钮，可以看到按照 “host” 筛选后的结果
案例：apache 访问日志
环境准备
centos7.5 系列虚拟机 ip address：192.168.200.113
[root@nginx ~]# hostname apache
[root@nginx ~]# bash
[root@apache ~]# yum -y install httpd[root@apache ~]# java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)[root@apache ~]# rpm -ivh logstash-5.5.1.rpm
[root@apache ~]# systemctl start httpd.service
[root@apache ~]# systemctl stop firewalld.service[root@apache ~]# cd /etc/logstash/conf.d/
[root@apache conf.d]# vim apache_log.confinput {
file {
path => "/var/log/httpd/access_log"
type => "access"
start_position => "beginning"
}
file {
path => "/var/log/httpd/error_log"
type => "error"
start_position => "beginning"
}
output {
if [type] == "access" {
elasticsearch {
hosts => ["192.168.200.111:9200"]
index => "apache_access-%{+YYYY.MM.dd}"
}
}
if [type] == "error" {
elasticsearch {
hosts => ["192.168.200.111:9200"]
index => "apache_error-%{+YYYY.MM.dd}"
}
}}
[root@apache conf.d]# /usr/share/logstash/bin/logstash -f apache_log.conf
