ELK 6.8.3 安装与配置（Windows）

可以在 [ElasticSearch 下载中心](https://elasticsearch.cn/download/) 下载对应版本的 *ElasticSearch*、*Logstash* 和 *Kibana* 。
这里使用的都是 *6.8.3* 版本。

## SpringBoot

直接发送日志到 *logstash* 地址

### *pom.xml*

```xml
<dependency>
    <groupId>net.logstash.logback</groupId>
    <artifactId>logstash-logback-encoder</artifactId>
    <version>6.1</version>
</dependency>
```

### *logback-spring.xml*

```xml

<appender name="logstash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
    <destination>${logstash.url}:4560</destination>
    <encoder charset="UTF-8" class="net.logstash.logback.encoder.LogstashEncoder"/>
</appender>

<root level="info">
    <appender-ref ref="logstash" />
</root>
```

> `${logstash.url}` 表示从环境变量中获取对应（*logstash.url*）的值。

### InvalidFrameProtocolException: Invalid Frame Type, received: 83

在 *Logstash* 收到请求时，启动窗口会显示如下异常。

```java
[2020-07-13T13:32:09,038][INFO ][org.logstash.beats.BeatsHandler] [local: 172.0.0.11:4560, remote: 172.0.0.11:57621] Handling exception: org.logstash.beats.BeatsParser$InvalidFrameProtocolException: Invalid Frame Type, received: 83
[2020-07-13T13:32:09,039][WARN ][io.netty.channel.DefaultChannelPipeline] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.netty.handler.codec.DecoderException: org.logstash.beats.BeatsParser$InvalidFrameProtocolException: Invalid Frame Type, received: 83
```

后来发现是由于配置文件写错了。 *Input* 的类型应该为 *tcp*，结果我从默认的配置文件 *logstash-sample.conf* 复制过来后忘记修改了（默认 *Input* 类型是 *beats*）。

### Could not create an Appender of type [net.logstash.logback.appender.LogstashTcpSocketAppender]

这个错误是在 SpringBoot Application 启动时报的，应该也是由于上面 *Logstash* 的配置错误导致的。

```java
> java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [net.logstash.logback.appender.LogstashTcpSocketAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type net.logstash.logback.appender.LogstashTcpSocketAppender
ERROR in ch.qos.logback.core.joran.spi.Interpreter@48:95 - ActionException in Action for tag [appender] ch.qos.logback.core.joran.spi.ActionException: ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type net.logstash.logback.appender.LogstashTcpSocketAppender
ERROR in ch.qos.logback.core.joran.action.AppenderRefAction - Could not find an appender named [logstash]. Did you define it below instead of above in the configuration file?
ERROR in ch.qos.logback.core.joran.action.AppenderRefAction - See http://logback.qos.ch/codes.html#appender_order for more details.
```

## Logstash

配置 *logstash* 接收日志并导出到 *Elasticsearch*

### *logstash-sv.conf*

```conf
input {
    tcp {
        mode => "server"
        host => "0.0.0.0"
        port => 4560
        codec => json_lines
    }
}

output {
    elasticsearch {
        hosts => ["http://172.0.0.11:9200"]
        index => "server-log-%{+YYYY.MM.dd}"
        #user => "elastic"
        #password => "changeme"
    }
}
```

## Kibans

安装 *Kibana* 并关联到 *Elasticsearch* 。

### *kibana.yml*

默认的 *server.host* 值为 *localhost* ，通过 ip 地址无法访问。

```yml
server.host: "172.0.0.11"
elasticsearch.hosts: ["http://172.0.0.11:9200"]
```

### 配置 Kibana

在 *Management* => *Kibana* => *Index Patterns* 配置索引名 `server-log-*` （支持通配符）

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ELK 6.8.3 安装与配置（Windows）

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