about 2 years ago

Collecting Application Log Use Logstash to Elasticsearch

Logstash是一個log收集的工具，提供了多種輸入輸出以及格式化的工具，但是在Linux平台會有比較好的支援，如果要跑在Windows上，就要多試試哪些指令是可以正常執行的

OS:Ubuntu14.04、Windows8
APP:JDK8、ElasticSearch1.6.0、logstash-1.5.2、kibana-4.1.1

Ubuntu14.04 安裝

用 Oracle VM VirtualBox 安裝 Ubuntu14.04，討厭的是 NAT 網卡並不提供給主機連線使用，所以要額外新增一張僅限主機的介面卡


編輯可供主機連線的網卡

sudo vi /etc/network/interfaces
auto eth1
iface eth1 inet dhcp
#啟動新增的網卡

sudo ifup eth1

關閉防火牆

sudo ufw disable

更新

sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get clean

JDK8安裝

手動安裝

cd /tmp
sudo mkdir -p /usr/lib/jvm
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u45-b14/jdk-8u45-linux-x64.tar.gz"
sudo tar -zxvf jdk-8u45-linux-x64.tar.gz -C /usr/lib/jvm
sudo mv /usr/lib/jvm/jdk1.8.0_45 /usr/lib/jvm/jdk8

增加環境變數

sudo vi ~/.bashrc
#最後一行添加以下內容
export JAVA_HOME=/usr/lib/jvm/jdk8
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=${JAVA_HOME}/bin:$PATH

立即生效

source ~/.bashrc

rpm安裝

sudo apt-get install rpm
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-x64.rpm"
rpm -ivh jdk-8u51-linux-x64.rpm

repository安裝

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
#JDK8 默認選擇條款
echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | sudo /usr/bin/debconf-set-selections
sudo apt-get install oracle-java8-installer

ElasticSearch安裝

手動安裝

cd /tmp
wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.6.0.tar.gz
sudo tar -zxvf elasticsearch-1.6.0.tar.gz
sudo mv elasticsearch-1.6.0 /usr/share/elasticsearch
cd /usr/share/elasticsearch
# 背景啟動
./bin/elasticsearch -d
./bin/elasticsearch &

編輯自動啟動腳本

sudo vi /etc/init.d/elasticsearch
#內容
export JAVA_HOME=/usr/lib/jvm/jdk8
/usr/share/elasticsearch/bin/elasticsearch -d
#設定權限
sudo chmod 777 /etc/init.d/elasticsearch
#安裝
sudo apt-get install sysv-rc-conf
#設定 勾選 2~5 按 q 離開
sudo sysv-rc-conf

deb安裝

wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.6.0.deb
sudo dpkg -i elasticsearch-1.6.0.deb
#啟動服務
sudo service elasticsearch start
#設定為開機啟動
sudo update-rc.d elasticsearch defaults 95 10

deb安裝會將檔案放到相對應的資料夾中，所以要自己去找

# if you want to remove it:
#sudo dpkg -r elasticsearch
 
# binaries & plugin
#/usr/share/elasticsearch/bin
 
# log dir
#/var/log/elasticsearch
 
# data dir
#/var/lib/elasticsearch
 
# config dir
#/etc/elasticsearch

如果出現檔案不存在造成啟動失敗可試著改

vi /etc/default/elasticsearch
#PID_DIR=/var/run/elasticsearch => PID_DIR=/var/run

配置

安裝套件

cd /usr/share/elasticsearch

bin/plugin -install mobz/elasticsearch-head
# 即時分片狀況 http://localhost:9200/_plugin/head/

bin/plugin -install lukas-vlcek/bigdesk
# 即時健康狀況 http://localhost:9200/_plugin/bigdesk/

bin/plugin -i elasticsearch/marvel/latest
# 官方版本(付費) http://localhost:9200/_plugin/marvel

bin/plugin -install royrusso/elasticsearch-HQ
# 比較好看的即時綜合管理介面 http://localhost:9200/_plugin/HQ/

bin/plugin -install lmenezes/elasticsearch-kopf
# 看起來不錯可以管理很多功能 http://localhost:9200/_plugin/kopf/#!/cluster

Application log 改用 log4j2

你如果不換你會遇到各種千奇百怪的log格式，還要處理Exception時多行log的問題，所以還是換比較簡單

套件相依部分需額外引入jackson來處理輸出Json

build.gradle 
apply plugin: 'java'
apply plugin: 'eclipse'

sourceCompatibility = 1.8
version = '1.0'

repositories {
    mavenCentral()
}

dependencies {
  compile 'org.apache.logging.log4j:log4j-core:2.3',
          'org.apache.logging.log4j:log4j-slf4j-impl:2.3',
          'com.fasterxml.jackson.core:jackson-core:2.5.4',
          'com.fasterxml.jackson.core:jackson-databind:2.5.4'
}

log4j2開始有約定大於配置的概念，只要在resources中放置Log4j2.xml，程式中不需要去處理設定檔的載入，log4j2預設就會去載入這個設定檔

Log4j2.xml 
<?xml version="1.0" encoding="UTF-8"?>
<Configuration xmlns="http://logging.apache.org/log4j/2.0/config">
    <Appenders>
        <Console name="console" target="SYSTEM_OUT">
            <!-- <JSONLayout compact="true" eventEol="true" /> -->
            <PatternLayout pattern="%d{yyy/MM/dd HH:mm:ss.SSS} %-5level - %msg%n" />
        </Console>
        <!-- <Syslog name="syslog" host="localhost" port="514" protocol="UDP" /> -->
        <RollingFile name="RollingFile" fileName="D:/Logserver/testlog/rolling_app.json"
            filePattern="D:/Logserver/testlog/rolling_app_%d{yyyy-MM-dd}.json">
            <JSONLayout compact="true" eventEol="true" locationInfo="true"></JSONLayout>
            <Policies>
                <TimeBasedTriggeringPolicy />
            </Policies>
        </RollingFile>
    </Appenders>

    <Loggers>
        <Root level="trace">
            <AppenderRef ref="console" />
            <AppenderRef ref="RollingFile" />
        </Root>
    </Loggers>
</Configuration>

測試程式

Test1.java 
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class Test1 {

    private static final Logger log = LogManager.getLogger(Test1.class);

    public static void main(String[] args) {
        
        log.debug("{} {} {}", "SAMTest", "5", "Taiwan");
        
        log.info("{} {} {}", "SAM", "30", "Taiwan");
        
        try {
            throw new Exception("exception test");
        } catch (Exception e) {
            log.error("exception", e);
        }
    }
}

這邊可以看到二代把slf4j好用的{}也實做出來了

輸出在log中是設定成一行一筆log，這邊好觀察就格式化了
這是INFO的log

{
  "timeMillis": 1436842674878,
  "thread": "main",
  "level": "INFO",
  "loggerName": "com.sam.log.Test1",
  "message": "SAM499 499 Taiwan",
  "endOfBatch": false,
  "loggerFqcn": "org.apache.logging.log4j.spi.AbstractLogger",
  "source": {
    "class": "com.sam.log.Test1",
    "method": "main",
    "file": "Test1.java",
    "line": 13
  }
}

這是ERROR的log

{
  "timeMillis": 1436842674879,
  "thread": "main",
  "level": "ERROR",
  "loggerName": "com.sam.log.Test1",
  "message": "exception",
  "thrown": {
    "commonElementCount": 0,
    "localizedMessage": "exception test",
    "message": "exception test",
    "name": "java.lang.Exception",
    "extendedStackTrace": [
      {
        "class": "com.sam.log.Test1",
        "method": "main",
        "file": "Test1.java",
        "line": 17,
        "exact": true,
        "location": "bin/",
        "version": "?"
      }
    ]
  },
  "endOfBatch": false,
  "loggerFqcn": "org.apache.logging.log4j.spi.AbstractLogger",
  "source": {
    "class": "com.sam.log.Test1",
    "method": "main",
    "file": "Test1.java",
    "line": 19
  }
}

其實資訊一點都沒有少，接下來要透過logstash把它輸出到Elasticsearch

logstash 安裝在Windows

執行很簡單，配置一下環境就可以運行了

SET PATH=D:\Logserver\logstash-1.5.2\bin;%PATH%
SET JAVA_HOME=D:\IDE\Java\jre1.8.0_45
logstash agent -f agent-es.conf

如果你想驗證conf正不正確可以加參數

logstash agent -f agent-es.conf --configtest

來說明一下配置檔部分

agent-es.conf 
input {
    file {
        type => "my-type"
        path => ["D:/Logserver/testlog/rolling_app.json"]
        codec => "json"
    }
}

filter {
    date {
        match => [ "timeMillis", "UNIX_MS" ]
        target => "@timestamp"
        locale => "zh_TW"
        timezone => "Asia/Taipei"
    }
    if [level] == "DEBUG" {
        drop {}
    }
    if [level] == "INFO" {
        grok {
            match => [ "message", "%{GREEDYDATA:username} %{GREEDYDATA:age} %{GREEDYDATA:country}" ]
        }
    }
}

output {
    elasticsearch {
        host => "192.168.56.102"
        port => "9200"
        protocol => "http"
        codec => "json"
    }
    stdout { codec => rubydebug }
}

配置檔很簡單就分三部分input、filter、output
input > file > type 進到ES後就是ES的type名稱

filter > date 是為了處理 log 中的 "timeMillis": 1436842674879
進入ES變這樣"@timestamp": "2015-07-14T03:12:09.599Z"

filter > if [level] == "DEBUG" 這個level標籤是本來就存在於json內所以不用先經過拆解程序就可以知道就是輸出成json最方便的地方,不然你可能要這樣判斷 if "|ERROR|" in [message]{ #if this is the 1st message in many lines message 總是比較不可靠,DEBUG的log就drop {}掉不收集啦

filter > grok 可以幫你再拆解 message 變下面這樣
"username": "SAM0",
"age": "0",
"country": "Taiwan"

output 就不說明了

對了,output無法接tcp啊,不知為何,所以只好直接丟es了

ES內的完整資料

{
  "took": 3,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 1,
    "hits": [
      {
        "_index": "logstash-2015.07.14",
        "_type": "my-type",
        "_id": "AU6Ko_DjHs08_r8b7xS3",
        "_score": 1,
        "_source": {
          "timeMillis": 1436845074805,
          "thread": "main",
          "level": "ERROR",
          "loggerName": "com.sam.log.Test1",
          "message": "exception",
          "thrown": {
            "commonElementCount": 0,
            "localizedMessage": "exception test",
            "message": "exception test",
            "name": "java.lang.Exception",
            "extendedStackTrace": [
              {
                "class": "com.sam.log.Test1",
                "method": "main",
                "file": "Test1.java",
                "line": 17,
                "exact": true,
                "location": "bin/",
                "version": "?"
              }
            ]
          },
          "endOfBatch": false,
          "loggerFqcn": "org.apache.logging.log4j.spi.AbstractLogger",
          "source": {
            "class": "com.sam.log.Test1",
            "method": "main",
            "file": "Test1.java",
            "line": 19
          },
          "@version": "1",
          "@timestamp": "2015-07-14T03:37:54.805Z",
          "host": "PCD-57",
          "path": "D:/Logserver/testlog/rolling_app.json",
          "type": "my-type"
        }
      },
      {
        "_index": "logstash-2015.07.14",
        "_type": "my-type",
        "_id": "AU6Ko-2lHs08_r8b7xS2",
        "_score": 1,
        "_source": {
          "timeMillis": 1436845074805,
          "thread": "main",
          "level": "INFO",
          "loggerName": "com.sam.log.Test1",
          "message": "SAM 30 Taiwan",
          "endOfBatch": false,
          "loggerFqcn": "org.apache.logging.log4j.spi.AbstractLogger",
          "source": {
            "class": "com.sam.log.Test1",
            "method": "main",
            "file": "Test1.java",
            "line": 14
          },
          "@version": "1",
          "@timestamp": "2015-07-14T03:37:54.805Z",
          "host": "PCD-57",
          "path": "D:/Logserver/testlog/rolling_app.json",
          "type": "my-type",
          "username": "SAM",
          "age": "30",
          "country": "Taiwan"
        }
      }
    ]
  }
}

Grok正則法
匹配多行

filter {
  grok { match =>
    ["message" , "(?<level>(\w+)?) (?<request_time>\d+(?:\.\d+)?) (?<test>(\w+)?)",
     "message" , "(?<level>(\w+)?) (?<request_time>(\w+)?) (?<test>(\w+)?)"]
       }
}

匹配多行的格式如上；
當第一個message語句匹配不上的時候，會自動使用第二個message進行匹配

kibana

cd /tmp
wget https://download.elastic.co/kibana/kibana/kibana-4.1.1-linux-x64.tar.gz
tar xvf kibana-*.tar.gz
# 修改 host 限制來源為 localhost，因為稍後會裝上 Nginx
vi ./kibana-4*/config/kibana.yml
host: "localhost"

安裝，因為下面的語法預設位置是/opt/kibana，一致比較好安裝

sudo mkdir -p /opt/kibana
sudo cp -R ./kibana-4*/* /opt/kibana/
cd /etc/init.d && sudo wget https://gist.githubusercontent.com/thisismitch/8b15ac909aed214ad04a/raw/bce61d85643c2dcdfbc2728c55a41dab444dca20/kibana4

啟動服務並設成隨機啟動

sudo chmod +x /etc/init.d/kibana4
sudo update-rc.d kibana4 defaults 96 9
sudo service kibana4 start

Install Nginx

sudo apt-get install nginx apache2-utils
sudo htpasswd -c /etc/nginx/htpasswd.users kibanaadmin
sudo vi /etc/nginx/sites-available/default
/etc/nginx/sites-available/default 
server {
    listen 80;

    server_name example.com;

    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/htpasswd.users;
        
    location / {
        proxy_pass http://localhost:5601;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

sudo service nginx restart

另一種設定

server {
    listen      80;
    return 301 https://example.com;
}

server {
  listen                *:443 ;
  ssl on;
  ssl_certificate /etc/nginx/ssl/all.crt;
  ssl_certificate_key /etc/nginx/ssl/server.key;

  server_name           example.com;
  access_log            /var/log/nginx/kibana.access.log;
  
  location /kibana4/ {
    proxy_pass http://localhost:5601/;
    proxy_redirect http://localhost:5601/ /kiban4/;
    auth_basic "Restricted";
    auth_basic_user_file /etc/nginx/conf.d/kibana.htpasswd;
    }
}

參考
https://www.digitalocean.com/community/tutorials/how-to-install-elasticsearch-logstash-and-kibana-4-on-ubuntu-14-04

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