This repo contains the code and scripts to build and test a simple web application and web services for demos.
The primary use case is to show problems in the chain of service calls. In the example below, service-3 has a problem and the error propogate back to the web UI.
By having Dynatrace OneAgent, the impacted services and root cause will be found.
Watch this Howdy Partner Twitch Episode to see it in action!!
Both the simple-web-app and the simple-web-service can be configured with a SERVICE_TO_CALL_URL environment variable that defines the simple-web-service it calls. This value can be set to the none or to some URL.
Each simple-web-service has an endpoint /api/message that will return JSON information about who it is, what the results of what it calls.
By configuring the simple-web-app SERVICE_TO_CALL_URL to a simple-web-service endpoint /api/message and then configuring that simple-web-service SERVICE_TO_CALL_URL to call another simple-web-service's endpoint /api/message, a chain of calls can be defined. In this example, the simple-web-app creates a chain to three simple-web-services.
If the simple-web-app can reach the SERVICE_TO_CALL_URL it is configured with or if SERVICE_TO_CALL_URL is set to none, then the UI will show green. If there is an error reaching the SERVICE_TO_CALL_URL, then it will show red and return an HTTP 500 error.
See the simple-web-app README for more details.
See the simple-web-service README for more details.
Assumes you have a Dynatrace tenant monitoring the application. The application can be running on a VM or on Kubernetes.
See the scripts README for more details for now to deploy.