istio.io/docs/reference/attribute-vocabulary.md

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Attribute Vocabulary	Attribute Vocabulary	doc-side-reference-nav.html	docs	docs	markdown

Attributes are a central concept used throughout Istio. You can find a description of what attributes are and what they are used for here.

A given Istio deployment has a fixed vocabulary of attributes that it understands. The specific vocabulary is determined by the set of attribute producers being used in the deployment. The primary attribute producer in Istio is Envoy, although Mixer and services can also introduce attributes.

Standard Istio attribute vocabulary

The table below shows the set of canonical attributes and their respective types. Most Istio deployments will have agents (Envoy or Mixer adapters) that produce these attributes.

Name	Type	Description	Kubernetes Example
source.ip	ip_address	The IP address of the client that sent the request.	10.0.0.117
source.port	int64	The port on the client that sent the request.	9284
source.name	string	The fully qualified name of the application that sent the request.	redis-master.my-namespace.svc.cluster.local
source.uid	string	A unique identifier for the particular instance of the application that sent the request.	kubernetes://redis-master-2353460263-1ecey.my-namespace
source.namespace	string	The namespace of the sender of the request.	my-namespace
source.labels	map	A map of key-value pairs attached to the source.
source.user	string	The user running the target application.	service-account
target.ip	ip_address	The IP address the request was sent to.	10.0.0.104
target.port	int64	The port the request was sent to.	8080
target.service	dns_name	The hostname that was the target of the request.	my-svc.my-namespace.svc.cluster.local
target.name	string	The fully qualified name of the application that was the target of the request.
target.uid	string	A unique identifier for the particular instance of the application that received the request.
target.namespace	string	The namespace of the receiver of the request.
target.labels	map	A map of key-value pairs attached to the target.
target.user	string	The user running the target application.	service-account
request.headers	map	A map of HTTP headers attached to the request.
request.id	string	A unique ID for the request, which can be propagated to downstream systems. This should be a guid or a psuedo-guid with a low probability of collision in a temporal window measured in days or weeks.
request.path	string	The HTTP URL path including query string
request.host	string	The HTTP Host header.
request.method	string	The HTTP method.
request.reason	string	The system parameter for auditing reason. It is required for cloud audit logging and GIN logging
request.referer	string	The HTTP referer header.
request.scheme	string	URI Scheme of the request
request.size	int64	Size of the request in bytes. For HTTP requests this is equivalent to the Content-Length header.
request.time	timestamp	The timestamp when the target receives the request. This should be equivalent to Firebase "now".
request.user-agent	string	The HTTP User-Agent header.
response.headers	map	A map of HTTP headers attached to the response.
response.size	int64	Size of the response body in bytes
response.time	timestamp	The timestamp when the target produced the response.
response.duration	duration	The amount of time the response took to generate.
response.code	int64	The response's HTTP status code