Semantic conventions for Varnish
Introcuction
Each span needs to be annotated with metadata to be useful. OpenTelemetry has Semantic Conventions for every signal. This document describes attributes that are specific to Varnish and its request and response handling.
Design
The following attributes are added
| Attribute | Type | Description | Examples |
|---|---|---|---|
varnish.vxid |
String | ID of the transaction. | 213 |
varnish.side |
String | Request handling side. | client;backend |
varnish.vcl |
String | Name of the VCL that handles the request. | boot |
varnish.backend.name |
String | Name of the backend that handles the request. | default |
varnish.backend.conn_reused |
Boolean | Indicates if the connection has been reused. | false |
The Rust package varnishotel_semconv is added to hold those attributes.