istio.io/content/docs/reference/config/policy-and-telemetry/metrics/index.md

title	description	weight
Default Metrics	Default Metrics exported from Istio through Mixer.	50

This page presents details about the metrics that Istio collects when using its initial configuration. You can add and remove metrics by changing configuration at any time, but this is the built-in set. They can be found [here]({{< github_file >}}/install/kubernetes/helm/istio/charts/mixer/templates/config.yaml) under the section with “kind: metric”. It uses metric template to define these metrics.

We will describe metrics first and then the labels for each metric.

Metrics

• Request Count: This is a COUNTER incremented for every request handled by an Istio proxy.

• Request Duration: This is a DISTRIBUTION which measures the duration of the request.

• Request Size: This is a DISTRIBUTION which measures the size of the HTTP request’s body size.

• Response Size: This is a DISTRIBUTION which measures the size of the HTTP response body size.

• Tcp Byte Sent: This is a COUNTER which measures the size of total bytes sent during response in case of a TCP connection.

• Tcp Byte Received: This is a COUNTER which measures the size of total bytes received during request in case of a TCP connection.

Labels

• Reporter: This identifies the reporter of the request. It is set to server if report is from a server Istio proxy and client if report is from a client Istio proxy.

  {{< text yaml >}} reporter: conditional((context.reporter.kind | "inbound") == "outbound", "client", "server") {{< /text >}}

• Source Namespace: This identifies the namespace of the source workload instance where the traffic originates.

  {{< text yaml >}} source_namespace: source.namespace | "unknown" {{< /text >}}

• Source Workload: This identifies the name of source workload which controls the source.

  {{< text yaml >}} source_workload: source.workload.name | "unknown" {{< /text >}}

• Source Workload Namespace: This identifies the namespace of the source workload.

  {{< text yaml >}} source_workload_namespace: source.workload.namespace | "unknown" {{< /text >}}

• Source Principal: This identifies the peer principal of the traffic source. It is set when peer authentication is used.

  {{< text yaml >}} source_principal: source.principal | "unknown" {{< /text >}}

• Source App: This identifies the source app based on app label of the source workload.

  {{< text yaml >}} source_app: source.labels["app"] | "unknown" {{< /text >}}

• Source Version: This identifies the version of the source workload.

  {{< text yaml >}} source_version: source.labels["version"] | "unknown" {{< /text >}}

• Destination Namespace: This identifies the namespace of the destination workload instance where the traffic is headed.

  {{< text yaml >}} destination_namespace: destination.namespace | "unknown" {{< /text >}}

• Destination Workload: This identifies the name of destination workload.

  {{< text yaml >}} destination_workload: destination.workload.name | "unknown" {{< /text >}}

• Destination Workload Namespace: This identifies the namespace of the destination workload.

  {{< text yaml >}} destination_workload_namespace: destination.workload.namespace | "unknown" {{< /text >}}

• Destination Principal: This identifies the peer principal of the traffic destination. It is set when peer authentication is used.

  {{< text yaml >}} destination_principal: destination.principal | "unknown" {{< /text >}}

• Destination App: This identifies the destination app based on app label of the destination workload.

  {{< text yaml >}} destination_app: destination.labels["app"] | "unknown" {{< /text >}}

• Destination Version: This identifies the version of the destination workload.

  {{< text yaml >}} destination_version: destination.labels["version"] | "unknown" {{< /text >}}

• Destination Service: This identifies destination service host responsible for an incoming request. Ex: "details.default.svc.cluster.local".

  {{< text yaml >}} destination_service: destination.service.host | "unknown" {{< /text >}}

• Destination Service Name: This identifies the destination service name. Ex: "details".

  {{< text yaml >}} destination_service_name: destination.service.name | "unknown" {{< /text >}}

• Destination Service Namespace: This identifies the namespace of destination service.

  {{< text yaml >}} destination_service_namespace: destination.service.namespace | "unknown" {{< /text >}}

• Request Protocol: This identifies the protocol of the request. It is set to API protocol if provided, otherwise request or connection protocol.

  {{< text yaml >}} request_protocol: api.protocol | context.protocol | "unknown" {{< /text >}}

• Response Code: This identifies the response code of the request. This label is present only on HTTP metrics.

  {{< text yaml >}} response_code: response.code | 200 {{< /text >}}

• Connection mTLS: This identifies the service authentication policy of the request. It is set to true, when Istio is used to make communication secure.

  {{< text yaml >}} connection_mtls: connection.mtls | false {{< /text >}}