OpenTracing support for Redis
This package enables distributed tracing for the Python redis library.
Note: If you need to use the old OpenTracing 1.0 API, use the 0.x releases.
Run the following command:
$ pip install signalfx-instrumentation-redis
Tracing a Redis client requires calling init_tracing() and optionally specify an OpenTracing-compatible tracer. See the examples directory for several different approaches.
import redis import redis_opentracing # If not provided, opentracing.tracer will be used. redis_opentracing.init_tracing(tracer) client = redis.StrictRedis() client.set('last_access', datetime.datetime.now())
It’s possible to trace only specific Redis clients:
redis_opentracing.init_tracing(tracer, trace_all_classes=False) redis_opentracing.trace_client(client) # Only commands and pipelines executed through this client will # be traced. res = client.get('last_access')
It’s also possible to trace only specific pipelines:
redis_opentracing.init_tracing(tracer, trace_all_classes=False) pipe = client.pipeline() redis_opentracing.trace_pipeline(pipe) # This pipeline will be executed as a single MULTI command. pipe.lpush('fruits', 'lemon', 'watermelon') pipe.rpush('fruits', 'pineapple', 'apple') pipe.execute()
When pipeline commands are executed as a transaction, these commands will be grouped under a single MULTI operation. They’ll also appear as a single operation in the trace. Outside of a transaction, each command will generate a span.
And it’s also possible to trace only specific pubsub objects:
redis_opentracing.init_tracing(tracer, trace_all_classes=False) pubsub = client.pubsub() redis_opentracing.trace_pubsub(pubsub) pubsub.subscribe('incoming-fruits') msg = pubsub.get_message() # This message will appear as a 'SUB' operation.
Incoming messages through get_message(), listen() and run_in_thread() will be traced, and any command executed through the pubsub’s execute_command() method will be traced too.
If you’re interested in learning more about the OpenTracing standard, please visit opentracing.io or join the mailing list. If you would like to implement OpenTracing in your project and need help, feel free to send us a note at email@example.com.
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