docker-compose 搭建 ELK 日志收集

Docker 安装

yum install y yum utils device mapper persistent data lvm2

为yum源添加docker仓库位置

yum config manager add repo https://download.docker.com/linux/centos/docker-ce.repo

安装docker

yum install docker-ce

启动docker

systemctl start docker

下载docker compose

curl L https://get.daocloud.io/docker/compose/releases/download/1.24.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

修改该文件的权限为可执行

chmod +x /usr/local/bin/docker-compose

查看是否安装成功

docker-compose --version

使用docker-compose 搭建elk环境

需要设置es系统内核参数，否则会因为内存不足无法启动。（不然启动后，docker直接内存泄漏）

# 改变设置
sysctl -w vm.max_map_count=262144
# 设置内核参数
$ echo "vm.max_map_count=262144" >> /etc/sysctl.conf
# 使立即生效
sysctl -p
# 重启 docker，让内核参数对docker服务生效
systemctl restart docker

创建一个存放logstash配置的目录并上传配置文件 logstash-springboot.conf文件内容

input {
  tcp {
    mode => "server"
    host => "0.0.0.0"
    port => 4560
    codec => json_lines
  }
}
output {
  elasticsearch {
    hosts => "es:9200"
    index => "springboot-logstash-%{+YYYY.MM.dd}"
  }
}

创建配置文件存放目录并上传配置文件到该目录

mkdir /mydata/logstash

docker-compose.yml内容

version: '3'
services:
  elasticsearch:
    image: elasticsearch:7.10.1
    container_name: elasticsearch
    environment:
      - "cluster.name=elasticsearch" #设置集群名称为elasticsearch
      - "discovery.type=single-node" #以单一节点模式启动
      - "ES_JAVA_OPTS=-Xms215m -Xmx215m" #设置使用jvm内存大小
    ports:
      - 9200:9200
  kibana:
    image: kibana:7.10.1
    container_name: kibana
    links:
      - elasticsearch:es #可以用es这个域名访问elasticsearch服务
    depends_on:
      - elasticsearch #kibana在elasticsearch启动之后再启动
    environment:
      - "elasticsearch.hosts=http://es:9200" #设置访问elasticsearch的地址
      - "I18N_LOCALE=zh-CN"
    ports:
      - 5601:5601
  logstash:
    image: logstash:7.10.1
    container_name: logstash
    volumes:
      - /mydata/logstash/logstash-springboot.conf:/usr/share/logstash/pipeline/logstash.conf #挂载logstash的配置文件
    depends_on:
      - elasticsearch #kibana在elasticsearch启动之后再启动
    links:
      - elasticsearch:es #可以用es这个域名访问elasticsearch服务
    ports:
      - 4560:4560

使用docker-compose命令运行

docker-compose up -d

在logstash中安装json_lines插件

# 进入logstash容器
docker exec -it logstash /bin/bash
# 进入bin目录
cd /bin/
# 安装插件
logstash-plugin install logstash-codec-json_lines
# 退出容器
exit
# 重启logstash服务
docker restart logstash

查看日志

docker-compose logs -f kibana
docker-compose logs -f elsaticsearch
docker-compose logs -f logstash

如果基于服务器，最后再阿里云后台将各个端口开发就可以了。不然 外网是不能访问的

http://ip地址:5601/

spring boot 项目使用

<!--集成logstash-->
        <dependency>
            <groupId>net.logstash.logback</groupId>
            <artifactId>logstash-logback-encoder</artifactId>
            <version>5.3</version>
        </dependency>

项目增加配置文件logback-spring.xml

<springProperty scope="context" name="springAppName"  source="spring.application.name"/>

<!--日志文件保存路径-->
<property name="LOG_FILE_PATH" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/logs}"/>

<contextName>${APP_NAME}</contextName>

<!--每天记录日志到文件appender-->
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <fileNamePattern>${LOG_FILE_PATH}/${APP_NAME}-%d{yyyy-MM-dd}.log</fileNamePattern>
        <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>${FILE_LOG_PATTERN}</pattern>
    </encoder>
</appender>
<!--输出到logstash的appender-->
<appender name="LOGSTASH" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <!--可以访问的logstash日志收集端口，这个改成服务器ip地址-->
    <destination>服务器IP:4560</destination>
    <!-- 日志输出编码 -->

    <encoder charset="UTF-8"  class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">
        <providers>
            <timestamp>
                <timeZone>UTC</timeZone>
            </timestamp>
            <pattern>
                <pattern>
                    {
                    "logLevel": "%level",
                    "serviceName": "${springAppName:-}",
                    "pid": "${PID:-}",
                    "thread": "%thread",
                    "class": "%logger{40}",
                    "message": "%message"
                    }
                </pattern>
            </pattern>
        </providers>
    </encoder>
</appender>
<root level="INFO">
    <appender-ref ref="CONSOLE"/>
    <appender-ref ref="FILE"/>
    <appender-ref ref="LOGSTASH"/>
</root>

```

测试代码

@RestController
@Slf4j
public class Test {

    @GetMapping("/test")
    public String test() {
        log.info("测试");
        return "test";
    }
}