Spring Boot使用Graylog收集日志

xiaoxiao2022-07-02 106

1.Graylog介绍

Graylog是一个生产级别的日志收集系统，集成Mongo和Elasticsearch进行日志收集。其中Mongo用于存储Graylog的元数据信息和配置信息，ElasticSearch用于存储数据。

架构图如下：生产环境配置图如下：

2.安装Graylog

在官方文档上推荐了很多种安装的方式，这里以docker-compose的方式为例，进行安装Graylog，mongo，elasticsearch。

docker-compose.yml内容如下（这里是在官网的基础上改了一下）：

version:'2' services: # MongoDB: https://hub.docker.com/_/mongo/ mongodb: image:mongo:3 # Elasticsearch: https://www.elastic.co/guide/en/elasticsearch/reference/6.6/docker.html elasticsearch: image:docker.elastic.co/elasticsearch/elasticsearch-oss:6.6.1 environment: - http.host=0.0.0.0 - transport.host=localhost - network.host=0.0.0.0 - "ES_JAVA_OPTS=-Xms256m -Xmx256m" ulimits: memlock: soft: -1 hard: -1 mem_limit: 512m # Graylog: https://hub.docker.com/r/graylog/graylog/ graylog: image: graylog/graylog:3.0 environment: # CHANGE ME (must be at least 16 characters)! - GRAYLOG_PASSWORD_SECRET=somepasswordpepper # Password: admin - GRAYLOG_ROOT_PASSWORD_SHA2=8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918 - GRAYLOG_HTTP_EXTERNAL_URI=http://106.13.35.42:9000/ links: - mongodb:mongo - elasticsearch depends_on: - mongodb - elasticsearch ports: # Graylog web interface and REST API - 9000:9000 # Syslog TCP - 1514:1514 # Syslog UDP - 1514:1514/udp # GELF TCP - 12201:12201 # GELF UDP - 12201:12201/udp

其中106.13.35.42是我的外网ip，本地服务使用127.0.0.1即可。

其他方式可以查看官方文档，https://docs.graylog.org/en/3.0/pages/installation.html

3.配置Graylog

在浏览器访问http://ip:9000，如图：这里默认用户名密码都是admin，进入后如图所示。选择System按钮中的input，录入一个输入源，如图这里以GELF UDP为例，在图中位置选择GELF UDP，选择完成后点击Launch new input，如图在Node处选择自己安装的，剩下的就根据需要填写即可，如图保存完成后如图，到这里就已经配置完成了。

4.SpringBoot日志输出到Graylog

这里分别举例Logback日志和Log4j2日志。

4.1 Logback日志

这里使用的logback-gelf向Graylog输出日志，在github上有对logback-gelf的详细使用介绍，这里只是简单举例。Github地址：https://github.com/osiegmar/logback-gelf。新建项目，加入logback-gelf依赖，pom文件如下：

<?xml version="1.0" encoding="utf-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/>  </parent> <groupId>com.dalaoyang</groupId> <artifactId>springboot2_graylog</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot2_graylog</name> <description>springboot2_graylog</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>de.siegmar</groupId> <artifactId>logback-gelf</artifactId> <version>2.0.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

加入logback日志配置，新建logback-spring.xml，内容如下:

<?xml version="1.0" encoding="utf-8"?> <configuration> <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter"/> <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter"/> <conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter"/> <property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>${CONSOLE_LOG_PATTERN}</pattern> <charset>UTF-8</charset> </encoder> </appender> <appender name="GELF" class="de.siegmar.logbackgelf.GelfUdpAppender"> <graylogHost>106.13.35.42</graylogHost> <graylogPort>12201</graylogPort> </appender>  <root level="info"> <appender-ref ref="GELF"/> <appender-ref ref="STDOUT"/> </root> </configuration>

启动项目，当前项目端口是8081，查看Graylog控制台如图：

4.2 Log4j2日志

log4j2日志使用的是log4j2-gelf依赖，github上面也有对应的介绍，pom文件如下：

<?xml version="1.0" encoding="utf-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/>  </parent> <groupId>com.dalaoyang</groupId> <artifactId>springboot2_graylog_log4j</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot2_graylog_log4j</name> <description>springboot2_graylog_log4j</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <exclusions> <exclusion> <artifactId>spring-boot-starter-logging</artifactId> <groupId>org.springframework.boot</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j2</artifactId> </dependency> <dependency> <groupId>org.graylog2.log4j2</groupId> <artifactId>log4j2-gelf</artifactId> <version>1.3.1</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

创建log4j2-spring.xml进行配置输出日志信息，如下：

<?xml version="1.0" encoding="utf-8"?> <Configuration status="OFF" packages="org.graylog2.log4j2"> <Properties> <Property name="LOG_PATTERN">%d{yyyy-MM-dd HH:mm:ss:SSS} - %-5level - %pid - %t - %c{1.}:%L - %m%n</Property> </Properties> <Appenders> <Console name="Console" target="SYSTEM_OUT" follow="true"> <ThresholdFilter level="trace" onMatch=" ACCEPT " onMismatch=" DENY "/> <PatternLayout pattern="${LOG_PATTERN}"/> </Console> <GELF name="gelfAppender" server="106.13.35.42" port="12201" hostName="appserver01.example.com"> <PatternLayout pattern="%logger{36} - %msg%n"/> <Filters> <Filter type="MarkerFilter" marker="FLOW" onMatch=" DENY " onMismatch=" NEUTRAL "/> <Filter type="MarkerFilter" marker="EXCEPTION" onMatch=" DENY " onMismatch=" ACCEPT "/> </Filters>  <KeyValuePair key="foo" value="bar"/> <KeyValuePair key="jvm" value="${java:vm}"/> </GELF> </Appenders> <Loggers> <Root level="info"> <AppenderRef ref="gelfAppender"/> <AppenderRef ref="Console"/> </Root> </Loggers> </Configuration>

这个项目使用的端口号是8888，可以在日志中清晰的看到。

5. ELK vs Graylog

这里仅以日志收集为例，简单说一下二者之间的选择，我个人的建议就是取决于现有技术栈，比如现在就有现成的Mongodb，那么选择Graylog可以节省不少成本，ELK类似，不要盲目的追求技术而选择。

6. 源码

springboot2_graylog源码地址：https://gitee.com/dalaoyang/springboot_learn/tree/master/springboot2_graylog

springboot2grayloglog4j源码地址：https://gitee.com/dalaoyang/springboot_learn/tree/master/springboot2_graylog_log4j

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