apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: openbsd-memory-rules
  namespace: monitoring
  labels:
    release: prometheus
spec:
  groups:
    # OpenBSD memory metrics mapped to Linux-compatible names
    - name: openbsd-memory
      rules:
        # Synthetic MemTotal for OpenBSD (maps to size_bytes)
        - record: node_memory_MemTotal_bytes
          expr: node_memory_size_bytes{os="openbsd"}
          labels:
            os: openbsd

        # Synthetic MemAvailable for OpenBSD
        # Available = free + inactive + cache (approximation)
        - record: node_memory_MemAvailable_bytes
          expr: node_memory_free_bytes{os="openbsd"} + node_memory_inactive_bytes{os="openbsd"} + node_memory_cache_bytes{os="openbsd"}
          labels:
            os: openbsd

        # Synthetic MemFree for OpenBSD
        - record: node_memory_MemFree_bytes
          expr: node_memory_free_bytes{os="openbsd"}
          labels:
            os: openbsd

        # Synthetic Cached for OpenBSD
        - record: node_memory_Cached_bytes
          expr: node_memory_cache_bytes{os="openbsd"}
          labels:
            os: openbsd