Configure Spring Boot to send logs to Logstash

Author: daniel-frak

pom.xml

@@ -15,6 +15,7 @@
     <description>Demo project for browsing Spring Boot logs in Kibana via Elasticsearch</description>
 
     <properties>
+        <logstash.logback.encoder.version>6.3</logstash.logback.encoder.version>
         <java.version>11</java.version>
     </properties>
 
@@ -47,6 +48,13 @@
                 </exclusion>
             </exclusions>
         </dependency>
+
+        <!-- Logstash -->
+        <dependency>
+            <groupId>net.logstash.logback</groupId>
+            <artifactId>logstash-logback-encoder</artifactId>
+            <version>${logstash.logback.encoder.version}</version>
+        </dependency>
     </dependencies>
 
     <build>

src/main/resources/application.properties

@@ -1 +1,4 @@
-
+server.port=8080
+spring.application.name=spring-boot-kibana-demo
+logstash.host=localhost
+logstash.port=5000

src/main/resources/logback-spring.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE configuration>
+
+<configuration scan="true">
+    <include resource="org/springframework/boot/logging/logback/base.xml"/>
+
+    <springProperty scope="context" name="app_name" source="spring.application.name"/>
+    <springProperty scope="context" name="app_port" source="server.port"/>
+    <springProperty scope="local" name="logstash_host" source="logstash.host"/>
+    <springProperty scope="local" name="logstash_port" source="logstash.port"/>
+
+    <appender name="logstash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
+        <param name="Encoding" value="UTF-8"/>
+        <remoteHost>${logstash_host}</remoteHost>
+        <port>${logstash_port}</port>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="logstash"/>
+    </root>
+</configuration>