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BaSyx / Documentation / Components / DataBridge / Features / Health Endpoint
Contents
Health Endpoint
User Story & Use Case
As BaSyx components administrator
I want a health endpoint for DataBridge component
so that I can easily check the healthiness of the used components
In various contexts, a health endpoint indicating the healthiness of the components is beneficial. For example, it can be utilized for waiting for a component startup. Additionally, it can be used in Kubernetes as container probes and thus automatically handle container failure.
Feature Overview
All BaSyx components expose the /health endpoint at their configured HTTP context. For example, if the DataBridge component is running at http://localhost:8085, the respective health endpoint can be accessed via http://localhost:8085/health. If the component is healthy, it will return the HTTP status code 200 OK with a response body containing the detailed status of context and routes as a JSON.
Sample Response Body
[ { "message": "", "details": { "invocation.count": 2, "context.name": "camel-1", "success.count": 2, "invocation.time": "2023-01-30T11:02:54.119537Z[Etc/UTC]", "context.version": "3.14.0", "context.status": "Started", "failure.count": 0 }, "state": "UP" }, { "message": "", "details": { "route.id": "app.health.context", "invocation.count": 2, "route.context.name": "camel-1", "success.count": 2, "invocation.time": "2023-01-30T11:02:54.119709Z[Etc/UTC]", "route.status": "Started", "failure.count": 0 }, "state": "UP" }, { "message": "", "details": { "route.id": "route1", "invocation.count": 2, "route.context.name": "camel-1", "success.count": 2, "invocation.time": "2023-01-30T11:02:54.119845Z[Etc/UTC]", "route.status": "Started", "failure.count": 0 }, "state": "UP" } ]
In the following, an excerpt of a compose.yml file is given where the 'examplecontainer' waits for the 'databridge' container startup indicated by the healthcheck using wget and the health endpoint.
version: '3.8' services: examplecontainer: # image etc. omitted depends_on: databridge: condition: service_healthy databridge: # image etc. omitted healthcheck: test: wget --no-verbose --tries=1 databridge:8085/health || exit 1 interval: 20s retries: 3 start_period: 10s timeout: 10s
Disclaimer: The health endpoint defined above is restricted to GET requests only, so please don't use the --spider option with wget. The --spider option in the wget command sends an HTTP HEAD request to the server instead of a GET request.
Feature Configuration
The feature is enabled by default and is available on port 8085 only. No additional configuration is necessary.