Amazon Bedrock Agents Tracing

Instrument LLM calls to AWS Bedrock via the boto3 client using the BedrockInstrumentor

Google Colabcolab.research.google.com

Amazon Bedrock Agents allow you to easily define, deploy, and manage agents on your AWS infrastructure. Traces on invocations of these agents can be captured using OpenInference and viewed in Phoenix.

This instrumentation will capture data on LLM calls, action group invocations (as tools), knowledgebase lookups, and more.

Launch Phoenix

Install

pip install openinference-instrumentation-bedrock

Setup

Connect to your Phoenix instance using the register function.

from phoenix.otel import register

# configure the Phoenix tracer
tracer_provider = register(
  project_name="my-llm-app", # Default is 'default'
  auto_instrument=True # Auto-instrument your app based on installed OI dependencies
)

After connecting to your Phoenix server, instrument boto3 prior to initializing a bedrock-runtime client. All clients created after instrumentation will send traces on all calls to invoke_model, invoke_agent, and their streaming variations.

import boto3

session = boto3.session.Session()
client = session.client("bedrock-runtime")

Run Bedrock Agents

From here you can run Bedrock as normal

session_id = f"default-session1_{int(time.time())}"

attributes = dict(
    inputText=input_text,
    agentId=AGENT_ID,
    agentAliasId=AGENT_ALIAS_ID,
    sessionId=session_id,
    enableTrace=True,
)
response = client.invoke_agent(**attributes)

Observe

Now that you have tracing setup, all calls will be streamed to your running Phoenix for observability and evaluation.

Bedrock Traces in Phoenix

Resources

• Tracing and Evals example

• OpenInference package