--- title: Log Entry overview: A template that represents a single runtime log entry. location: https://istio.io/docs/reference/config/template/logentry.html layout: protoc-gen-docs number_of_entries: 3 ---

The `logentry` template represents an individual entry within a log.

## Template

The `logentry` template represents an individual entry within a log.

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

Example config:

    apiVersion: "config.istio.io/v1alpha2"
    kind: logentry
    metadata:
      name: accesslog
      namespace: istio-system
    spec:
      severity: '"Default"'
      timestamp: request.time
      variables:
        sourceIp: source.ip | ip("0.0.0.0")
        destinationIp: destination.ip | ip("0.0.0.0")
        sourceUser: source.user | ""
        method: request.method | ""
        url: request.path | ""
        protocol: request.scheme | "http"
        responseCode: response.code | 0
        responseSize: response.size | 0
        requestSize: request.size | 0
        latency: response.duration | "0ms"
      monitored_resource_type: '"UNSPECIFIED"'

Field | Type | Description
--- | --- | ---
`variables` | `map<string, istio.mixer.adapter.model.v1beta1.Value>` | Variables that are delivered for each log entry.
`timestamp` | `istio.mixer.adapter.model.v1beta1.TimeStamp` | Timestamp is the time value for the log entry
`severity` | `string` | Severity indicates the importance of the log entry.
`monitoredResourceType` | `string` | Optional. An expression to compute the type of the monitored resource this log entry is being recorded on. If the logging backend supports monitored resources, these fields are used to populate that resource. Otherwise these fields will be ignored by the adapter.
`monitoredResourceDimensions` | `map<string, istio.mixer.adapter.model.v1beta1.Value>` | Optional. A set of expressions that will form the dimensions of the monitored resource this log entry is being recorded on. If the logging backend supports monitored resources, these fields are used to populate that resource. Otherwise these fields will be ignored by the adapter.

## istio.mixer.adapter.model.v1beta1.TimeStamp

TimeStamp is used inside templates for fields that are of ValueType “TIMESTAMP”

## istio.mixer.adapter.model.v1beta1.Value

Value is used inside templates for fields that have dynamic types. The actual datatype of the field depends on the datatype of the expression used in the operator configuration.