I have been at this all day and not getting it to work after trying so many combinations. At the end of the day, I am looking for an explicit list of steps to get JSON logging from Karaf. I have even gone through the Maven Karaf plugin source code trying to sort this out, though perhaps I didn't look far enough.
I am using Karaf 4.2.6. I am attempting to build a Karaf deployment using the karaf-maven-plugin, version 4.2.6.
If I change my layout.type for various appenders to JsonLayout, I get a stacktrace saying it can't load the JSON layout because I am missing a class. java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/ser/FilterProvider.
I looked at the jar org.ops4j.pax.logging/pax-logging-log4j2/1.10.2 and found I needed 3 Jackson jars, Core v2.8.7, Annotations v2.8.0, and Databind v2.8.7.
I have been trying to get these files in etc/startup.properties with either the start level of 5 or the start level of 8 so that they are ready for org.ops4j.pax.logging/pax-logging-log4j2/1.10.2 when it starts. I made sure they were in the system folder in the correct place. Most of the time, if I did get them into etc/startup.properties, they had a start level of 30. I placed them in a feature with the correct start levels, but they were either started well after whatever used startup.properties or just never showed up. I tried many possibly combinations, startupBundles, startupFeatures, bootFeatures, but nothing got it in startup.properties. I could not figure out how the contents of startup.properties got generated. Sometimes the features I wanted for my application wouldn't even start because something about the configuration got blocked on setting up the logging if I just placed references to those jars in startup.properties, for example
mvn\:com.fasterxml.jackson.core/jackson-core/2.8.7 = 5
Below is my pom.xml with somethings from previous attempts commented out:
<?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>
<properties>
<my_version>0.0.0</my_version>
<myapp_common_version>0.0.0</myapp_common_version>
</properties>
<groupId>com.me.myapp</groupId>
<artifactId>myapp-karaf</artifactId>
<version>${my_version}</version>
<packaging>karaf-assembly</packaging>
<name>myapp-karaf</name>
<description>myapp-karaf details</description>
<repositories>
<!-- Apache ServiceMix repository (for region) -->
<repository>
<id>apache.servicemix.m2</id>
<name>Apache ServiceMix M2 repository</name>
<url>http://svn.apache.org/repos/asf/servicemix/m2-repo</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<!-- OPS4J SNAPSHOT repository -->
<repository>
<id>ops4j.sonatype.snapshots.deploy</id>
<name>OPS4J snapshot repository</name>
<url>https://oss.sonatype.org/content/repositories/ops4j-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<!-- Apache SNAPSHOT -->
<repository>
<id>apache.snapshots.deploy</id>
<name>Apache snapshot repository</name>
<url>https://repository.apache.org/content/groups/snapshots-group</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.apache.karaf.features</groupId>
<artifactId>framework</artifactId>
<version>4.2.6</version>
<type>kar</type>
</dependency>
<dependency>
<groupId>org.apache.karaf.features</groupId>
<artifactId>standard</artifactId>
<version>4.2.6</version>
<classifier>features</classifier>
<type>xml</type>
</dependency>
<dependency>
<groupId>org.apache.karaf.features</groupId>
<artifactId>spring</artifactId>
<version>4.2.6</version>
<classifier>features</classifier>
<type>xml</type>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.karaf.features</groupId>
<artifactId>enterprise</artifactId>
<version>4.2.6</version>
<classifier>features</classifier>
<type>xml</type>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.me.myapp</groupId>
<artifactId>myapp-common-feature</artifactId>
<version>${myapp_common_version}</version>
<classifier>features</classifier>
<type>xml</type>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.me.myapp</groupId>
<artifactId>myapp-feature</artifactId>
<!-- Annoyingly this cannot come from an environment variable -->
<version>${my_version}</version>
<classifier>features</classifier>
<type>xml</type>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>${env.MYAPP_SOURCE_HOME}/myapp-common/server/karaf/assembly</directory>
<filtering>false</filtering>
<includes>
<include>**/*</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
<includes>
<include>**/*</include>
</includes>
</resource>
<resource>
<directory>src/main/filtered-resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*</include>
</includes>
</resource>
</resources>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.karaf.tooling</groupId>
<artifactId>karaf-maven-plugin</artifactId>
<version>4.2.6</version>
<extensions>true</extensions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<id>process-resources</id>
<goals>
<goal>resources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.karaf.tooling</groupId>
<artifactId>karaf-maven-plugin</artifactId>
<configuration>
<startupBundles> <!--
<bundle>mvn:com.fasterxml.jackson.core/jackson-annotations/2.8.0</bundle>
<bundle>mvn:com.fasterxml.jackson.core/jackson-core/2.8.7</bundle>
<bundle>mvn:com.fasterxml.jackson.core/jackson-databind/2.8.7</bundle> -->
</startupBundles>
<installedFeatures>
</installedFeatures>
<startupFeatures>
<feature>com.me.myapp/${my_version}</feature>
</startupFeatures>
<bootFeatures>
<feature>com.me.myapp.logging.provider/${myapp_common_version}</feature>
<!-- standard distribution -->
<!-- <feature>standard</feature> -->
<!-- minimal distribution -->
<!--<feature>minimal</feature>-->
<feature>jaas</feature>
<feature>shell</feature>
<feature>ssh</feature>
<feature>management</feature>
<feature>bundle</feature>
<feature>config</feature>
<feature>deployer</feature>
<feature>diagnostic</feature>
<feature>instance</feature>
<feature>kar</feature>
<feature>wrap</feature>
<feature>log</feature>
<feature>package</feature>
<feature>service</feature>
<feature>system</feature>
</bootFeatures>
<javase>1.8</javase>
</configuration>
</plugin>
</plugins>
</build>
</project>
com.me.myapp.logging.provider contains the Jackson jars with the proper start level.
I am running my containers in Kubernetes and want standard log collection in Kubernetes to work. I am using using an extra plugin on the logs collector to at least separate things somewhat into a JSON format, but it is error prone and I'd rather just start with JSON formatted logs rather than processing later downstream so I can separate components of the log, such as person who did the operation, at the time of logging.
I have searched on Stack Overflow, have Googled, and found hints, but no explicit steps that lead to a solution. I realize there is not an explicit listing of files here, but, as I said, I went through many combinations. Any help would be MUCH appreciated. I will also post on the Karaf user group.
