Enricher for MicroProfile Health implementations

[manusa]

Description

Provide HealthCheck enricher for MicroProfile Health implementations:

• SmallRye Health + Quarkified version
• ...
• KumuluzEE Add KumuluzEEHealthCheckEnricher to add Kubernetes health checks for KumuluzEE applications #1719
• Helidon Add HelidonHealthCheckEnricher to add Kubernetes health checks for Helidon applications #1713

See also:

• https://github.com/eclipse/microprofile-health/blob/master/spec/src/main/asciidoc/protocol-wireformat.adoc

[manusa]

Internal reference: [protean-dev] Philosophy around healthchecks

• https://docs.google.com/document/d/11L8grYyPCNcHjcoXFo4tZomUG74bQ_JsWJOMmgyWxjQ/edit#

[sunix]

1. This issue for the implementation
2. IT for each specific frameworks:

• Add OpenLibertyHealthCheckEnricher to automatically add health checks in OpenLiberty projects  #1473 etc...
• QuarkusHealthCheckEnricher : Add /q/health/started as startup probe if enabled  #1468

[rohanKanojia]

I think we have health check implementations for the following Microprofile implementations:

• OpenLiberty: feat (jkube-kit) : Add OpenLibertyHealthCheckEnricher to generate automatic Kubernetes health check probes (#1473) #1541
• Quarkus: QuarkusHealthCheckEnricher
• Wildfly: WildflyJARHealthCheckEnricher
• ThorntailV2: ThorntailV2HealthCheckEnricher

In Microprofile Starter, I also see some other Microprofile runtimes for old versions of Microprofile (3.3):

• Payara Micro
• KumuluzEE Add KumuluzEEHealthCheckEnricher to add Kubernetes health checks for KumuluzEE applications #1719
• Helidon Add HelidonHealthCheckEnricher to add Kubernetes health checks for Helidon applications #1713

Do we need to consider these runtimes as well? If yes, I'd create issues for these. Or can we ignore it since they're using an old version of Microprofile?

[manusa]

Considering we haven't released 1.9.0 yet, we might want to refactor + redocument what was done in #1541 (#1473).

As suggested in #1473 (comment), #1473 looks like a duplicate of this issue, however, it's coupled to OpenLiberty, when it probably shouldn't.

In addition, there are more artifacts that provide a MicroProfile health implementation.

• SmallRye Health:
  • https://smallrye.io/docs/smallrye-health/3.0.1/index.html
  • https://github.com/smallrye/smallrye-health/ (io.smallrye)
  • We currently supported through Quarkus, which is OK, because Quarkus' dependency (quarkus-smallrye-health) has its own nuances. However, we should maybe support it too for its standalone usage or its usage with other libraries/frameworks.

Part of the scope of this issue is analyzing other implementations and see how we should add support for them.