The task-demo-metrics-wavefront project creates a sample Spring Cloud Task (and Spring Batch) with the monitoring infrastructure, so it can be monitored in Spring Cloud Data Flow.

Create custom Spring Cloud Task

If you use the provided task-demo-metrics-wavefront source code you can skip this section.

Otherwise, follow the instructions below to build new Task with enabled Wavefront monitoring

Follow the Task development instructions and then:

Set the parent POM version of Boot to 2.3.1.RELEASE or latest

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.1.RELEASE</version>
    <relativePath/>
</parent>

Make sure that spring-cloud-dependencies version Hoxton.SR6 or newer are imported:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR6</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

Add dependencies to enable the Spring Cloud Task (and optionally Spring Task Batch) functionality and to configure the jdbc dependencies for the task repository.

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-task</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-batch</artifactId>
    </dependency>
</dependencies>

Add dependencies to configure the jdbc dependencies for the task repository:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.mariadb.jdbc</groupId>
    <artifactId>mariadb-java-client</artifactId>
    <scope>runtime</scope>
</dependency>

Add dependencies to configure Micrometer integration:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-wavefront</artifactId>
</dependency>

Build

Run

./mvnw clean install

Will produce task-demo-metrics-wavefront-2.0.0-SNAPSHOT.jar task application under the target folder.

Spring Cloud Data Flow server

Follow the Task Monitoring instructions to register, run and monitor the task sample using Influx, Wavefront or Prometheus on the desired platform.

Docker images

Build and publish docker image

Fabric8 - Maven plugin

./mvnw clean install docker:build
./mvnw docker:push

Jib - Maven plugin

./mvnw clean install jib:build

or for test purposes build a local image:

./mvnw clean install jib:dockerBuild

Dockerfile

./mvnw clean install
docker build -t springcloud/task-demo-metrics-wavefront:dockerfile .