Host

Host

Status:

type: host

Description: A host is defined as a computing instance. For example, physical servers, virtual machines, switches or disk array.

Other Attributes:

:warning: This entity definition contains attributes without a role. Stable Entities MUST NOT have attributes without a defined role.

Key	Stability	Requirement Level	Value Type	Description	Example Values
host.arch		Recommended	string	The CPU architecture the host system is running on.	amd64; arm32; arm64
host.id		Recommended	string	Unique host ID. For Cloud, this must be the instance_id assigned by the cloud provider. For non-containerized systems, this should be the machine-id. See the table below for the sources to use to determine the machine-id based on operating system. [1]	fdbf79e8af94cb7f9e8df36789187052
host.image.id		Recommended	string	VM image ID or host OS image ID. For Cloud, this value is from the provider.	ami-07b06b442921831e5
host.image.name		Recommended	string	Name of the VM image or OS install the host was instantiated from.	infra-ami-eks-worker-node-7d4ec78312; CentOS-8-x86_64-1905
host.image.version		Recommended	string	The version string of the VM image or host OS as defined in Version Attributes.	0.1
host.name		Recommended	string	Name of the host. On Unix systems, it may contain what the hostname command returns, or the fully qualified hostname, or another name specified by the user.	opentelemetry-test
host.type		Recommended	string	Type of host. For Cloud, this must be the machine type.	n1-standard-1
host.ip		Opt-In	string[]	Available IP addresses of the host, excluding loopback interfaces. [2]	["192.168.1.140", "fe80::abc2:4a28:737a:609e"]
host.mac		Opt-In	string[]	Available MAC addresses of the host, excluding loopback interfaces. [3]	["AC-DE-48-23-45-67", "AC-DE-48-23-45-67-01-9F"]

[1] host.id: 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.

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.

[2] host.ip: IPv4 Addresses MUST be specified in dotted-quad notation. IPv6 addresses MUST be specified in the RFC 5952 format.

[3] host.mac: MAC Addresses MUST be represented in IEEE RA hexadecimal form: as hyphen-separated octets in uppercase hexadecimal form from most to least significant.

host.arch has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
amd64	AMD64
arm32	ARM32
arm64	ARM64
ia64	Itanium
ppc32	32-bit PowerPC
ppc64	64-bit PowerPC
s390x	IBM z/Architecture
x86	32-bit x86

Host CPU

Status:

type: host.cpu

Description: A host’s CPU information

Other Attributes:

:warning: This entity definition contains attributes without a role. Stable Entities MUST NOT have attributes without a defined role.

Key	Stability	Requirement Level	Value Type	Description	Example Values
host.cpu.cache.l2.size		Opt-In	int	The amount of level 2 memory cache available to the processor (in Bytes).	12288000
host.cpu.family		Opt-In	string	Family or generation of the CPU.	6; PA-RISC 1.1e
host.cpu.model.id		Opt-In	string	Model identifier. It provides more granular information about the CPU, distinguishing it from other CPUs within the same family.	6; 9000/778/B180L
host.cpu.model.name		Opt-In	string	Model designation of the processor.	11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
host.cpu.stepping		Opt-In	string	Stepping or core revisions.	1; r1p1
host.cpu.vendor.id		Opt-In	string	Processor manufacturer identifier. A maximum 12-character string. [4]	GenuineIntel

[4] host.cpu.vendor.id: CPUID command returns the vendor ID string in EBX, EDX and ECX registers. Writing these to memory in this order results in a 12-character string.