Trace Span
- Template

Trace Span

The tracespan template represents an individual span within a distributed trace.

Example config:

apiVersion: "config.istio.io/v1alpha2"
kind: instance
metadata:
  name: default
  namespace: istio-system
spec:
  compiledTemplate: tracespan
  params:
    traceId: request.headers["x-b3-traceid"]
    spanId: request.headers["x-b3-spanid"] | ""
    parentSpanId: request.headers["x-b3-parentspanid"] | ""
    spanName: request.path | "/"
    startTime: request.time
    endTime: response.time
    clientSpan: (context.reporter.kind | "inbound") == "outbound"
    rewriteClientSpanId: "false"
    spanTags:
      http.method: request.method | ""
      http.status_code: response.code | 200
      http.url: request.path | ""
      request.size: request.size | 0
      response.size: response.size | 0
      source.principal: source.principal | ""
      source.version: source.labels["version"] | ""

See also: Distributed Tracingfor information on tracing within Istio.

Template

TraceSpan represents an individual span within a distributed trace.

When writing the configuration, the value for the fields associated with this template can either be aliteral or an expression. Please note that if the datatype of a field is not istio.policy.v1beta1.Value,then the expression’s inferred type must match the datatype of the field.

Field	Type	Description	Required
`traceId`	`string`	Trace ID is the unique identifier for a trace. All spans from the sametrace share the same Trace ID. Required.	No
`spanId`	`string`	Span ID is the unique identifier for a span within a trace. It is assignedwhen the span is created. Optional.	No
`parentSpanId`	`string`	Parent Span ID is the unique identifier for a parent span of this spaninstance. If this is a root span, then this field MUST be empty. Optional.	No
`spanName`	`string`	Span name is a description of the span’s operation. For example, the name can be a qualified method name or a file nameand a line number where the operation is called. A best practice is to usethe same display name within an application and at the same call point.This makes it easier to correlate spans in different traces. Required.	No
`startTime`	`TimeStamp`	The start time of the span. Required.	No
`endTime`	`TimeStamp`	The end time of the span. Required.	No
`spanTags`	`map<string, Value>`	Span tags are a set of < key, value > pairs that provide metadata for theentire span. The values can be specified in the form of expressions. Optional.	No
`httpStatusCode`	`int64`	HTTP status code used to set the span status. If unset or set to 0, thespan status will be assumed to be successful.	No
`clientSpan`	`bool`	client_span indicates the span kind. True for client spans and False ornot provided for server spans. Using bool instead of enum is a temporarywork around since mixer expression language does not yet support enumtype. Optional	No
`rewriteClientSpanId`	`bool`	rewrite_client_span_id is used to indicate whether to create a new clientspan id to accommodate Zipkin shared span model. Some tracing systems likeStackdriver separates a RPC into client span and server span. To solve thisincompatibility, deterministically rewriting both span id of client span andparent span id of server span to the same newly generated id. Optional	No
`sourceName`	`string`	Identifies the source (client side) of this span.Should usually be set to `source.workload.name`. Optional.	No
`sourceIp`	`IPAddress`	Client IP address. Should usually be set to `source.ip`. Optional.	No
`destinationName`	`string`	Identifies the destination (server side) of this span.Should usually be set to `destination.workload.name`. Optional.	No
`destinationIp`	`IPAddress`	Server IP address. Should usually be set to `destination.ip`. Optional.	No
`requestSize`	`int64`	Request body size. Should usually be set to `request.size`. Optional.	No
`requestTotalSize`	`int64`	Total request size (headers and body).Should usually be set to `request.total_size`. Optional.	No
`responseSize`	`int64`	Response body size. Should usually be set to `response.size`. Optional.	No
`responseTotalSize`	`int64`	Response total size (headers and body).Should usually be set to `response.total_size`. Optional.	No
`apiProtocol`	`string`	One of “http”, “https”, or “grpc” or any other value ofthe `api.protocol` attribute. Should usually be set to `api.protocol`. Optional.	No