Currently, when an ACM user specifies custom metrics in `example.rules.yaml`, ACM creates the appropriate Prometheus records for the entries. However, when it comes to querying the metrics from Prometheus, ACM currently only copies the hard-coded metrics and not all metrics specified in the `example.rules.yaml` file [1][2][3]. In addition, the build in the `Makefile` should be modified so that the CodecoApp CR types automatically contain new fields for the metrics [4]. Our use case requires us to use custom metrics (e.g. latency, throughput, ...) in PDLC so that the PDLC-RL component can optimize pod placement based on these metrics. However, ACM currently doesn't have a way for us to send these custom metrics to PDLC. [1] https://gitlab.eclipse.org/eclipse-research-labs/codeco-project/acm/-/blob/main/controllers/codecoapp_controller.go?ref_type=heads#L277-312 [2] https://gitlab.eclipse.org/eclipse-research-labs/codeco-project/acm/-/blob/main/controllers/codecoapp_controller.go?ref_type=heads#L219-246 [3] https://gitlab.eclipse.org/eclipse-research-labs/codeco-project/acm/-/blob/main/controllers/codecoapp_controller.go?ref_type=heads#L219-246 [4] https://gitlab.eclipse.org/eclipse-research-labs/codeco-project/acm/-/blob/main/api/v1alpha1/codecoapp_types.go?ref_type=heads#L206-246