spring-boot-debug-app VS prometheus-operator-helmfile

This is a GitHub link to my demo app. It’s simple Spring Boot web app used to debugging various stuff. There are many ways to configure JSON logging in Spring Boot. I decided to use Logback because it is easy to configure and one of the most widely used logging library in the Java Community. To enable JSON logging we need to add below dependencies.

My demo app (GitHub Link) uses Spring Boot version 3, or more precisely the latest release from 2022, i.e. 3.0.1. The core monitoring component in Spring Boot is Actuator. If you remember the migration of Spring Boot from version 1 to 2, you’ll probably remember that update brought a lot of breaking changes in Actuator. Fortunately, in the case of version 3, no such changes have been made, so you can apply the following configurations to Spring Boot version 2.x.x

apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: demo spec: destination: namespace: sandbox server: https://kubernetes.default.svc project: default source: path: infra/helm repoURL: https://github.com/luafanti/spring-boot-debug-app targetRevision: main plugin: env: - name: HELM_VALUES value: | serviceAccount: create: true image: repository: luafanti/spring-boot-debug-app tag: main pullPolicy: IfNotPresent replicaCount: 1 resources: memoryRequest: 256Mi memoryLimit: 512Mi cpuRequest: 500m cpuLimit: 1 probes: liveness: initialDelaySeconds: 15 path: /actuator/health/liveness failureThreshold: 3 successThreshold: 1 timeoutSeconds: 3 periodSeconds: 5 readiness: initialDelaySeconds: 15 path: /actuator/health/readiness failureThreshold: 3 successThreshold: 1 timeoutSeconds: 3 periodSeconds: 5 ports: http: name: http value: 8080 management: name: management value: 8081 envs: - name: VAULT_SECRET_USER value: - name: VAULT_SECRET_PASSWORD value: log: level: spring: "info" service: "info" syncPolicy: {}

Firstly, clone my GitHub repo with Prometheus Operator helmfile, and check how little configuration is needed to install all stuff. This is because the Prometheus Operator installation comes with reasonably safe defaults whenever possible, so we have only to overwrite some crucial values. To install it we need to exec single command.