MongoDb probe app

Description

Sample mongodb app. Based on spring boot + mongodb starter + opentelemetry starter. Packaged as:

• a cloudfoundry compatible jar
• an OCI image
• a helm chart for convenient k8s deployment of the image with adapter config (mongodb uri, otel endpoint)

references:

• https://github.com/kokuwaio/helm-maven-plugin
• https://opentelemetry.io/blog/2024/spring-starter-stable/
• https://opentelemetry.io/docs/languages/java/configuration/
• https://github.com/pivotal-cf/java-cfenv/blob/main/java-cfenv-boot/src/main/java/io/pivotal/cfenv/spring/boot/MongoCfEnvProcessor.java
• https://docs.spring.io/spring-boot/appendix/application-properties/index.html#application-properties.data.spring.data.mongodb.database

basic tests

chart values.yaml:

mongodb:
  uri: mongodb://databaseAdmin:yyyy.zzzz:27017,rs0-1-2e385b67-a1c9-4aa0-910d-b25dc99e9c5d.zzzz:27017,rs0-2-2e385b67-a1c9-4aa0-910d-b25dc99e9c5d.zzzz:27017/admin?replicaSet=rs0
  tlsSecretName: mysecret
  tlsSecretCaKey: ca.crt
  
otlp:
  serviceName: probe-for-mongodb
  tracing:
    endpoint: http://jaeger-collector-303ada4c-4478-49dd-b427-8c482bfc17b8.zzzz:443
    sampling:
      probability: 1.0

install OCI chart:

helm install mongodb-probe  oci://ghcr.io/orange-cloudfoundry/mongodb-probe/mongodb-probe -f ./mongodb-probe-values.yaml

testing probe REST API:

curl -X POST http://localhost:8080/api/persons -H 'Content-type:application/json' -d '{"name": "titi", "age": "30"}'
curl -X POST http://localhost:8080/api/persons -H 'Content-type:application/json' -d '{"name": "toto", "age": "35"}'
curl http://localhost:8080/api/persons | jq .