TracesMetricsApp LogsCustom LogsProfiling

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Prerequisites

  • To monitor APM data on dashboard, Middleware Host agent needs to be installed.
  • You can refer this demo project to refer use cases of APM.

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Getting Started

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Step 1: Install MW’s APM Package

Run the following command in your terminal: 
pip install middleware-apm

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Step 2: Auto-install Required Packages

The middleware-bootstrap -a install command reads through the list of packages installed in your active site-packages folder, and installs the corresponding instrumentation libraries for these packages, if applicable. 
middleware-bootstrap -a install

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Step 3: Import the Tracker

Add the following lines at the very start of your project: 
from mw_tracker import MwTracker
tracker=MwTracker(
    access_token="{YOUR-ACCESS_TOKEN}"
)
You can find your {YOUR-ACCESS_TOKEN} on the Installation screen for Python.

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Enable MW’s APM functionalities

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1. Enable Distributed Tracing

Distributed-tracing is a default functionality of MW’s APM. This will be auto-enabled when you execute the command mentioned in Run Your Application section.

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2. Enable Metrics

You can enable metrics by writing the following line just after the tracker initialization. 
tracker.collect_metrics()

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3. Enable Logs

Similar to metrics, you can enable logs by writing the following line. 
tracker.collect_logs()

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4. Enable Profiling

For the Profiling feature, you need to write the following line. 
tracker.collect_profiling()

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Your Code will look like this

After adding all the above steps, your code will look like this: 
import logging

from mw_tracker import MwTracker
tracker=MwTracker(
    access_token="{YOUR-ACCESS_TOKEN}"
)

tracker.collect_metrics()
tracker.collect_logs()
tracker.collect_profiling()

logging.info("Hello World!", extra={'key': 'value'})
For additional information and in-depth guidance, you can clone the sample project from the GitHub repository to explore further.

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Run Your Application

To run your application, you need to execute the following command: 
middleware-instrument \
--exporter_otlp_endpoint http://localhost:9319 \
--resource_attributes=project.name={APM-PROJECT-NAME},mw.app.lang=python,runtime.metrics.python=true \
--service_name {APM-SERVICE-NAME} \
python3 app.py
You need to replace {APM-PROJECT-NAME} and {APM-SERVICE-NAME} with your project name and service name respectively.

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For APM inside Kubernetes

If you are using APM in a Kubernetes cluster make sure to follow these two steps:

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Step 1: Find your Middleware Service namespace

For older setup, your “mw-service” can be inside mw-agent-ns-{FIRST-5-LETTERS-OF-API-KEY} namespace For newer setup, we simplified the namespace name to mw-agent-ns

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Step 2: Set this ENV variable in your application deployment YAML

MW_AGENT_SERVICE=mw-service.NAMESPACE.svc.cluster.local
Please replace “NAMESPACE” with the correct value that you found from Step 1.

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Troubleshoot:

If you receive a warning similar to the following:
WARNING: The scripts middleware-bootstrap and middleware-instrument are installed in ‘/home/…/.local/bin’ which is not on PATH.Consider adding this directory to PATH or, if you prefer to suppress this warning, use —no-warn-script-location
You can add the binary to your path In linux, you can add this with 
export PATH=$PATH:/home/.../.local/bin

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Error Handling :

If you want to record exception in traces then, you can use tracker.record_error(e) method. 
randomList = ['a', 0, 2]

for entry in randomList:
    try:
         r = 1/int(entry)
         break
    except Exception as e:
         tracker.record_error(e)