go-synthetic

go-synthetic

go-synthetic is a toy application that emits example Prometheus metrics and exemplars.

Metrics and behaviour are synthetic. go-synthetic program allocates some memory, burns some CPU and optionally (see --*-count flags) provide all possible metric types (including exotic OpenMetrics types and Native Histograms).

It's used for testing and validation purposes, but also can be used to demo and debug Prometheus monitoring infrastructure.

Running Locally

You can run this application locally via:

go run ./examples/instrumentation/go-synthetic/

Then, you can access the /metrics endpoint. For example, via curl:

curl localhost:8080/metrics

Authorization

The example application can be protected with various authorization methods:

BasicAuth

go run ./examples/instrumentation/go-synthetic/ --basic-auth-username=admin --basic-auth-password=pw
curl localhost:8080/metrics -u "admin:pw"

Authorization

go run ./examples/instrumentation/go-synthetic/ --auth-scheme=Bearer --auth-parameters=xyz
curl -H "Authorization: Bearer xyz" localhost:8080/metrics

OAuth 2.0

go run ./examples/instrumentation/go-synthetic/ --oauth2-client-id=abc --oauth2-client-secret=xyz
curl "localhost:8080/token?grant_type=client_credentials&client_id=abc&client_secret=xyz"
# Fetch access token from above and use as bearer token example below:
curl -H "Authorization: Bearer DZ~9UYwD" localhost:8080/metrics

mTLS

go run ./examples/instrumentation/go-synthetic/ --tls-create-self-signed=true
curl -k https://localhost:8080/metrics

Running on Kubernetes

If running managed-collection on a Kubernetes cluster, the go-synthetic can be deployed and monitored by:

kubectl apply -f ./go-synthetic.yaml