Custom tags configuration

Custom tags configuration via startup parameter

You can use OTEL_RESOURCE_ATTRIBUTES= startup parameter to pass a custom static tag to all spans generated in the service. For example:

OTEL_RESOURCE_ATTRIBUTES="service.name=Accounts"
OTEL_RESOURCE_ATTRIBUTES="application=OnlineBanking,exampleKey=exampleValue"

Custom tags configuration through your code

If the default tags are not providing enough relevant data you can add custom tags or attributes into spans. Follow these steps:

Step 1: Satisfy project dependencies

Add the opentelemetry-sdk library.

• Maven projects

  <!-- https://mvnrepository.com/artifact/io.opentelemetry/opentelemetry-sdk -->
  <dependency>
      <groupId>io.opentelemetry</groupId>
      <artifactId>opentelemetry-sdk</artifactId>
      <version>1.16.0</version>
  </dependency>

• Gradle projects

  dependencies {
  compile 'io.opentelemetry:opentelemetry-sdk:1.16.0'
  }

Step 2: Import dependencies

Import dependencies in the application Java class file:

import io.opentelemetry.api.trace.Span;

Step 3: Add custom tag into Span

Use the following to add a custom tag:

Span currentSpan = Span.current();
currentSpan.setAttribute("foo","bar");