micronaut-spring and spring-boot-actuator, can't access /actuator endpoints

Question

Just trying out micronaut with Spring capability, and can't get access to my /actuator endpoints Spring Boot v2.3.0 release and micronaut 2.0.0.M3

I created a basic micronaut project using the mn create-app xxx --lang groovy.

I have then added the spring dependencies and micronaut-spring and associated annotation processors.

My build.gradle now looks as follows

plugins {
    id "groovy"
    id "com.github.johnrengelman.shadow" version "5.2.0"
    id "application"
    id "net.ltgt.apt" version "0.21"  //enables annotation preproccessing support
    id "net.ltgt.apt-idea" version "0.21"
    id "org.springframework.boot" version "2.3.0.RELEASE"
    id "io.spring.dependency-management" version "1.0.9.RELEASE"
}

ext['groovy.version'] = '3.0.4'

version "0.1"
group "com.softwood"

repositories {
    mavenCentral()
    maven { url "https://jcenter.bintray.com" }
}

configurations {
    // for dependencies that are needed for development only
    developmentOnly 
}

dependencies {

    //annotation processors
    annotationProcessor platform("io.micronaut:micronaut-bom:$micronautVersion")
    annotationProcessor "io.micronaut.spring:micronaut-spring-boot-annotation"
    annotationProcessor "io.micronaut.spring:micronaut-spring-web-annotation"
    testAnnotationProcessor "io.micronaut.spring:micronaut-spring-web-annotation:2.0.1"

    //latest groovy v3
    implementation group: 'org.codehaus.groovy', name: 'groovy-all', version: '3.0.4' //, ext: 'pom'

    //spring
    compileOnly "io.micronaut.spring:micronaut-spring-annotation:2.0.1"
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("org.springframework.boot:spring-boot-starter-actuator")
    implementation group: 'io.micronaut.spring', name: 'micronaut-spring-web', version: '2.0.1'
    runtime ("io.micronaut.spring:micronaut-spring-boot:2.0.1")


    compileOnly platform("io.micronaut:micronaut-bom:$micronautVersion")
    compileOnly "io.micronaut:micronaut-inject-groovy"
    implementation platform("io.micronaut:micronaut-bom:$micronautVersion")
    implementation "io.micronaut:micronaut-runtime-groovy"
    implementation "io.micronaut:micronaut-validation"
    implementation "javax.annotation:javax.annotation-api"
    implementation "io.micronaut:micronaut-http-server-netty"
    implementation "io.micronaut:micronaut-http-client"
    runtimeOnly "ch.qos.logback:logback-classic:1.2.3"
    testCompileOnly platform("io.micronaut:micronaut-bom:$micronautVersion")
    testImplementation platform("io.micronaut:micronaut-bom:$micronautVersion")
    testImplementation("org.spockframework:spock-core:2.0-M2-groovy-3.0") {
        exclude group: "org.codehaus.groovy", module: "groovy-all"
    }
    testImplementation "io.micronaut:micronaut-inject-groovy"
    testImplementation "io.micronaut.test:micronaut-test-spock"
    testImplementation "io.micronaut.test:micronaut-test-junit5"
}

test.classpath += configurations.developmentOnly

mainClassName = "com.softwood.Application"

//added - enable incremetal compile feature - can't enable with annotation processors !
/*tasks.withType(GroovyCompile).configureEach {
    options.incremental = true
}*/

tasks.withType(GroovyCompile) {
    groovyOptions.forkOptions.jvmArgs.add('-Dgroovy.parameters=true')
}


shadowJar {
    mergeServiceFiles()
}

tasks.withType(JavaExec) {
    classpath += configurations.developmentOnly
    jvmArgs('-noverify', '-XX:TieredStopAtLevel=1', '-Dcom.sun.management.jmxremote')
}

I have adjusted a HelloController as follows

import io.micronaut.http.annotation.Controller
import io.micronaut.http.annotation.Get
import io.micronaut.http.HttpStatus
import org.springframework.boot.actuate.endpoint.annotation.Endpoint


@Controller("/hello")
@Endpoint
class HelloController {

    @Get("/")
    String index() {
        return 'hello william'
    }
}

and marked the Application class as being a SpringbootApplication - but call the Micronaut.run() to build the MN context etc

import io.micronaut.runtime.Micronaut
import groovy.transform.CompileStatic
import org.springframework.boot.autoconfigure.SpringBootApplication

@CompileStatic
@SpringBootApplication
class Application {
    static void main(String[] args) {
        Micronaut.run(Application)
    }
}

I tried to adjust application.yml to expose all the endpoints as follows

micronaut:
  application:
    name: micronaut-std-app

management:
  endpoints:
    web:
      exposure:
        include=*:

This all compiles ok, and runs ok. if you invoke the localhost:8080/hello you get the expected string

if you try and access the actuator endpoints - nothing is being generated, and the browser displays

{"message":"Page Not Found","_links":{"self":{"href":"/actuator/health","templated":false}}}

if your trying to do a mixed micronaut and spring project, then how do you get any actuator endpoints enabled for your MN pre processed controllers etc ?

Answer 1

If you just want a health check endpoint, Micronaut have build in health check endpoint available.

Add in the build.gradle the fallowing dependence to add the endpoints like health:

implementation("io.micronaut:micronaut-management")

You can add in the application.yml

endpoints:
    health:
        enabled: true

Then change the health check url to "/health"