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ELK简介

ELK日志系统相信大家都不陌生了，如果你的系统是集群有多个实例，那么去后台看日志肯定不方便，因为前台访问时随机路由到后台app的，所以需要一个聚合的日志查询系统。ELK就是一个不错的选择。

ELK简单说的是：Elasticsearch + Logstash + Kibana。Logstash用于分析日志，获取想要的日志格式；Elasticsearch用于给日志创建索引；Kibana用于展现日志。

这里我们还要增加一个采集软件：FileBeat，用于采集各app的日志。

系统机构图如下：

ELK配置

安装ELK的环境需要安装JDK，这里我会说一些简单的配置，详细的安装大家可以自行上网搜索。有兴趣的童鞋可以看看这篇文章：

“

https://blog.51cto.com/54dev/2570811?source=dra

”

当我们解压了Logstash软件后，我们需要修改startup.options文件配置：

cd logstash/config/startup.options

LS_HOME=/home/elk/support/logstash
LS_SETTINGS_DIR="${LS_HOME}/config"

LS_OPTS="--path.settings ${LS_SETTINGS_DIR}"
LS_JAVA_OPTS=""

LS_PIDFILE=${LS_HOME}/logs/logstash.pid

LS_USER=elk
LS_GROUP=elk

LS_GC_LOG_FILE=${LS_HOME}/logs/logstash-gc.log

cd logstash/config/logstash-aicrm-with-filebeat.yml

input {
beats {
    port => 5044
    }
}

output {
    elasticsearch {
    hosts => "192.168.205.129:9200"
    index => "aicrm-app-node"
    }
}

cd filebeat/filebeat.yml

filebeat:
prospectors:
-
paths:
- /home/elk/logs/xxx*.log
type: log
mutiline.pattern: '^\['
mutiline.negate: true
mutiline.match: after

output:
logstash:
hosts: ["192.168.205.129:5044"]

cd kibana/config/kibana.yml

...
7 server.host: "0.0.0.0"
8
...
21 elasticsearch.url: "http://192.168.205.129:9200";
22

配置好后，启动ELK

启动顺序为：elasticsearch ➡ logstash ➡ filebeat ➡ kibana

启动后的进程：

我们浏览器端访问：

http://192.168.205.129:5601/app/kibana

这里我们需要创建ES索引

之后我们就可以搜索日志了：

关于日志解析

根据业务情况，会出现ELK解析多种格式的日志需求，这时需要在Logstash的配置文件中配置grok规则解析日志文件，grok解析建议使用在线工具测试。

解析样例：

在线测试样例：

Grok的语句需要写在ELK的Logstash中的配置文件中，如下图：

异常日志

2018-11-09 23:01:18.766  [ERROR]  com.xxx.rpc.server.handler.ServerHandler - 调用com.xxx.search.server.SearchServer.search时发生错误！
java.lang.reflect.InvocationTargetException
 at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)

grok解析

%{TIMESTAMP_ISO8601:log_time} [%{DATA:log_level}] %{GREEDYDATA:message}

解析结果

{
"log_time": [
  [
    "2018-11-09 23:01:18.766"
  ]
],
"YEAR": [
  [
    "2018"
  ]
],
"MONTHNUM": [
  [
    "11"
  ]
],
"MONTHDAY": [
  [
    "09"
  ]
],
"HOUR": [
  [
    "23",
    null
  ]
],
"MINUTE": [
  [
    "01",
    null
  ]
],
"SECOND": [
  [
    "18.766"
  ]
],
"ISO8601_TIMEZONE": [
  [
    null
  ]
],
"log_level": [
  [
    "ERROR"
  ]
],
"message": [
  [
    " com.xxx.rpc.server.handler.ServerHandler - 调用com.xxx.search.server.SearchServer.search时发生错误！"
  ]
]

我们再来解析如下日志：

<operation_in>请求报文：service_name接口名，sysfunc_id功能号，operator_id 操作员id，organ_id 机构号，request_seq 请求流水

2018-11-12 15:03:41.388 639211542011357848  [DEBUG]  com.base.core.aop.http.HttpClient.send(HttpClient.java:128) - 
reqid:b7fb8f90ddeb11e83d622c02b34132f7;AOP 发送信息: <?xml version="1.0" encoding="GBK"?><operation_in<service_name>BSM_SaleSystemLogin</service_name>     
<sysfunc_id>91008027</sysfunc_id><request_type>1002</request_type><verify_code>304147201506190000000040</verify_code><operator_id>9991445</operator_id>              
 <organ_id>9999997</organ_id><request_time>20181112150341</request_time><request_seq>154200622111</request_seq><request_source>304147</request_source><request_target></request_target><msg_version>0100</msg_version><cont_version>0100</cont_version><access_token></access_token><content><request><msisdn>13xx6945211</msisdn><password>871221</password><portal_id>101704</portal_id><login_type>34</login_type><machine_mac>0000</machine_mac><machine_ip>120.33.xxx.198, 10.46.xxx.182, </machine_ip><machine_cpu></machine_cpu><machine_system_ver>12.0.1</machine_system_ver><machine_totalmemory></machine_totalmemory><machine_usablememory></machine_usablememory><machine_ie_ver></machine_ie_ver></request></content></operation_in>
<operation_out>
<operation_out><service_name>BSM_SaleSystemLogin</service_name><request_type>1002</request_type><sysfunc_id>91008027</sysfunc_id>
<request_seq>15xxx0622111</request_seq><response_time>20181112150342</response_time><response_seq>471860579309</response_seq><request_source>304147</request_source><response><resp_type>0</resp_type><resp_code>0000</resp_code><resp_desc/></response><content><response><base_info><verifycode>173616671275425657328820</verifycode><operator_id>132394</operator_id><row><msisdn>13xxx945211</msisdn><role_id>6100004</role_id><owning_mode>1</owning_mode><status>1</status><inure_time>20170623145448</inure_time><expire_time>30000101000000</expire_time><request_source>0</request_source><modify_time>20170623145448</modify_time><modify_operator_id>4020205</modify_operator_id><modify_content>创建手机号码与角色对应关系

我们将此段日志在Grok网站进行解析，获得grok语句：

%{TIMESTAMP_ISO8601:log_time} %{DATA:serial_number} [%{DATA:log_level}] %{GREEDYDATA:message}<service_name>%{DATA:service_name}</service_name> <sysfunc_id>%{DATA:sysfunc_id}</sysfunc_id><request_type>%{DATA:other}</operator_id><organ_id>%{DATA:organ_id}</organ_id><request_time>%{DATA:request_time}</request_time><request_seq>%{DATA:request_seq}</request_seq><request_source>%{DATA:other}<operation_out>

解析结果如下：

{
  "log_time": [
    [
      "2018-11-12 15:03:41.388"
    ]
  ],
  "YEAR": [
    [
      "2018"
    ]
  ],
  "MONTHNUM": [
    [
      "11"
    ]
  ],
  "MONTHDAY": [
    [
      "12"
    ]
  ],
  "HOUR": [
    [
      "15",
      null
    ]
  ],
  "MINUTE": [
    [
      "03",
      null
    ]
  ],
  "SECOND": [
    [
      "41.388"
    ]
  ],
  "ISO8601_TIMEZONE": [
    [
      null
    ]
  ],
  "serial_number": [
    [
      "639211542011357848 "
    ]
  ],
  "log_level": [
    [
      "DEBUG"
    ]
  ],
  "message": [
    [
      " com.base.core.aop.http.HttpClient.send(HttpClient.java:128) - reqid:b7fb8f90ddeb11e83d622c02b34132f7;AOP 发送信息: <?xml version="1.0" encoding="GBK"?>   <operation_in"
    ]
  ],
  "service_name": [
    [
      "BSM_SaleSystemLogin"
    ]
  ],
  "sysfunc_id": [
    [
      "91008027"
    ]
  ],
  "other": [
    [
      "1002</request_type><verify_code>304147201506190000000040</verify_code><operator_id>9991445",
      "304147</request_source><request_target></request_target><msg_version>0100</msg_version><cont_version>0100</cont_version><access_token></access_token><content><request><msisdn>13xxx945211</msisdn><password>871221</password><portal_id>101704</portal_id><login_type>34</login_type><machine_mac>0000</machine_mac><machine_ip>120.33.xxx.198, 10.46.xxx.182, </machine_ip><machine_cpu></machine_cpu><machine_system_ver>12.0.1</machine_system_ver><machine_totalmemory></machine_totalmemory><machine_usablememory></machine_usablememory><machine_ie_ver></machine_ie_ver></request></content></operation_in>"
    ]
  ],
  "organ_id": [
    [
      "9999997"
    ]
  ],
  "request_time": [
    [
      "20181112150341"
    ]
  ],
  "request_seq": [
    [
      "154xxx622111"
    ]
  ]
}

我们再来解析一条niginx的日志：

2018/11/01 23:30:39 [error] 15105#0: *397937824 connect() failed (111: Connection refused) while connecting to upstream, client: 10.48.xxx.3, server: 127.0.0.1, request: "POST /o2o_usercenter_svc/xxx/sysUserInfoService?req_sid=1612e430ddeb11e83d622c02b34132f7&syslogid=null HTTP/1.1", upstream: "http://127.0.0.1:xxx/o2o_usercenter_svc/remote/sysUserInfoService?req_sid=1612e430ddeb11e83d622c02b34132f7&syslogid=null", host: "10.46.xxx.155:xxx"

解析语句：

(?%{YEAR}[./-]%{MONTHNUM}[./-]%{MONTHDAY}[- ]%{TIME}) [%{LOGLEVEL:severity}] %{POSINT:pid}#%{NUMBER}: %{GREEDYDATA:errormessage}(?:, client: (?<remote_addr>%{IP}|%{HOSTNAME}))(?:, server: %{IPORHOST:server}?)(?:, request: %{QS:request})?(?:, upstream: (?\”%{URI}\”|%{QS}))?(?:, host: %{QS:request_host})?(?:, referrer: \”%{URI:referrer}\”)?

解析结果如下：

{
  "timestamp": [
    [
      "2018/11/01 23:30:39"
    ]
  ],
  "YEAR": [
    [
      "2018"
    ]
  ],
  "MONTHNUM": [
    [
      "11"
    ]
  ],
  "MONTHDAY": [
    [
      "01"
    ]
  ],
  "TIME": [
    [
      "23:30:39"
    ]
  ],
  "HOUR": [
    [
      "23"
    ]
  ],
  "MINUTE": [
    [
      "30"
    ]
  ],
  "SECOND": [
    [
      "39"
    ]
  ],
  "severity": [
    [
      "error"
    ]
  ],
  "pid": [
    [
      "15105"
    ]
  ],
  "NUMBER": [
    [
      "0"
    ]
  ],
  "BASE10NUM": [
    [
      "0"
    ]
  ],
  "errormessage": [
    [
      "*397937824 connect() failed (111: Connection refused) while connecting to upstream"
    ]
  ],
  "remote_addr": [
    [
      "10.48.xxx.3"
    ]
  ],
  "IP": [
    [
      "10.48.xxx.3",
      null,
      null,
      null
    ]
  ],
  "IPV6": [
    [
      null,
      null,
      null,
      null
    ]
  ],
  "IPV4": [
    [
      "10.48.xxx.3",
      null,
      null,
      null
    ]
  ],
  "HOSTNAME": [
    [
      null,
      "127.0.0.1",
      "127.0.0.1",
      null
    ]
  ],
  "server": [
    [
      "127.0.0.1"
    ]
  ],
 ...
}

Kibana图表面板

上图中，我们可以在Kibana上面配置一些监控面板。比如配置异常日志监控。

关于ELK监控面板配置，有兴趣的童鞋可以看看这篇文章：

“

https://blog.51cto.com/hnr520/1845900

”