groups:
  - id: resource.host
    type: resource
    stability: experimental
    name: host
    brief: >
        A host is defined as a computing instance. For example, physical servers, virtual machines, switches or disk array.
    attributes:
      - ref: host.id
        note: |
          Collecting `host.id` from non-containerized systems

          **Non-privileged Machine ID Lookup**

          When collecting `host.id` for non-containerized systems non-privileged lookups
          of the machine id are preferred. SDK detector implementations MUST use the
          sources listed below to obtain the machine id.

          | OS | Primary | Fallback |
          |---------|---------|---------|
          | Linux   | contents of `/etc/machine-id` | contents of `/var/lib/dbus/machine-id` |
          | BSD     | contents of `/etc/hostid` | output of `kenv -q smbios.system.uuid` |
          | MacOS   | `IOPlatformUUID` line from the output of `ioreg -rd1 -c "IOPlatformExpertDevice"` | - |
          | Windows | `MachineGuid` from registry `HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography`  | - |

          **Privileged Machine ID Lookup**

          The `host.id` can be looked up using privileged sources. For example, Linux
          systems can use the output of `dmidecode -t system`, `dmidecode -t baseboard`,
          `dmidecode -t chassis`, or read the corresponding data from the filesystem
          (e.g. `cat /sys/devices/virtual/dmi/id/product_id`,
          `cat /sys/devices/virtual/dmi/id/product_uuid`, etc), however, SDK resource
          detector implementations MUST not collect `host.id` from privileged sources. If
          privileged lookup of `host.id` is required, the value should be injected via the
          `OTEL_RESOURCE_ATTRIBUTES` environment variable.
      - ref: host.name
      - ref: host.type
      - ref: host.arch
      - ref: host.image.name
      - ref: host.image.id
      - ref: host.image.version
      - ref: host.ip
        requirement_level: opt_in
      - ref: host.mac
        requirement_level: opt_in

  - id: resource.host.cpu
    type: resource
    stability: experimental
    name: host.cpu
    brief: >
      A host's CPU information
    attributes:
      - ref: host.cpu.vendor.id
        requirement_level: opt_in
      - ref: host.cpu.family
        requirement_level: opt_in
      - ref: host.cpu.model.id
        requirement_level: opt_in
      - ref: host.cpu.model.name
        requirement_level: opt_in
      - ref: host.cpu.stepping
        requirement_level: opt_in
      - ref: host.cpu.cache.l2.size
        requirement_level: opt_in