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  1. DZone
  2. Data Engineering
  3. AI/ML
  4. A Step-by-Step Guide to Building an MLOps Pipeline for LLMs and RAG

A Step-by-Step Guide to Building an MLOps Pipeline for LLMs and RAG

Learn how to build an automated MLOps pipeline for LLMs and RAG models, covering key aspects like training, deployment, and continuous performance monitoring.

By 
Kuppusamy Vellamadam Palavesam user avatar
Kuppusamy Vellamadam Palavesam
·
Nov. 18, 24 · Tutorial
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This tutorial will walk through the setup of a scalable and efficient MLOps pipeline designed specifically for managing large language models (LLMs) and Retrieval-Augmented Generation (RAG) models. We’ll cover each stage, from data ingestion and model training to deployment, monitoring, and drift detection, giving you the tools to manage large-scale AI applications effectively.

Prerequisites

  1. Knowledge of Python for scripting and automating pipeline tasks.
  2. Experience with Docker and Kubernetes for containerization and orchestration.
  3. Access to a cloud platform (like AWS, GCP, or Azure) for scalable deployment.
  4. Familiarity with ML frameworks (such as PyTorch and Hugging Face Transformers) for model handling.

Tools and Frameworks 

  • Docker for containerization
  • Kubernetes or Kubeflow for orchestration
  • MLflow for model tracking and versioning
  • Evidently AI for model monitoring and drift detection
  • Elasticsearch or Redis for retrieval in RAG

Step-by-Step Guide

Step 1: Setting Up the Environment and Data Ingestion

1. Create a Docker Image for Your Model  

Begin by setting up a Docker environment to hold your LLM and RAG model. Use the Hugging Face Transformers library to load your LLM and define any preprocessing steps required for data.

Dockerfile
 
FROM python:3.8

WORKDIR /app

COPY requirements.txt .

RUN pip install -r requirements.txt

COPY . .

CMD ["python", "app.py"]

 

Tip: Keep dependencies minimal for faster container spin-up.

2. Data Ingestion Pipeline

Build a data pipeline that pulls data from your database or storage. If using RAG, connect your data pipeline to a database like Elasticsearch or Redis to handle document retrieval. This pipeline can run as a separate Docker container, reading in real-time data.

Python
 
# ingestion_pipeline.py

from elasticsearch import Elasticsearch

def ingest_data():

    es = Elasticsearch()  # Add data ingestion logic


Step 2: Model Training and Fine-Tuning With MLOps Integration

1. Integrate MLflow for Experiment Tracking 

MLflow is essential for tracking different model versions and monitoring their performance metrics. Set up an MLflow server to log metrics, configurations, and artifacts.

Python
 
import mlflow

with mlflow.start_run():

    # Log model parameters and metrics

    mlflow.log_metric("accuracy", accuracy)

    mlflow.log_artifact("model", "/path/to/model")


2. Fine-Tuning With Transformers

Use the Hugging Face Transformers library to fine-tune your LLM or set up RAG by combining it with a retrieval model. Save checkpoints at each stage so MLflow can track the fine-tuning progress.

Python
 
from transformers import AutoModelForSeq2SeqLM, AutoTokenizer

    model = AutoModelForSeq2SeqLM.from_pretrained("facebook/bart-large")

    tokenizer = AutoTokenizer.from_pretrained("facebook/bart-large")  # Fine-tune model


Step 3: Deploying Models With Kubernetes

1. Containerize Your Model With Docker

Package your fine-tuned model into a Docker container. This is essential for scalable deployments in Kubernetes.

2. Setup Kubernetes and Deploy With Helm

Define a Helm chart for managing the Kubernetes deployment. This chart should include resource requests and limits for scalable model inference.

YAML
 
# deployment.yaml file

apiVersion: apps/v1
kind: Deployment
  metadata:
  name: model-deployment
spec:
  replicas: 3
    template:
      spec:
         containers:
         - name: model-container
           image: model_image:latest
           ports:
           - containerPort: 5000


3. Configure Horizontal Pod Autoscaler (HPA)

Use HPA to scale pods up or down based on traffic load.

Shell
 
 kubectl autoscale deployment model-deployment --cpu-percent=80 --min=2 --max=10


Step 4: Real-Time Monitoring and Drift Detection

1. Set Up Monitoring With Evidently AI

Integrate Evidently AI to monitor the performance of your model in production. Configure alerts for drift detection, allowing you to retrain the model if data patterns change.

Python
 
# pythonfile

import evidently
from evidently.model_profile import Profile
from evidently.model_profile.sections import DataDriftProfileSection

profile = Profile(sections=[DataDriftProfileSection()])

profile.calculate(reference_data, production_data)


2. Enable Logging and Alerting

Set up logging through Prometheus and Grafana for detailed metrics tracking. This will help monitor real-time CPU, memory usage, and inference latency.

Step 5: Automating Retraining and CI/CD Pipelines

1. Create a CI/CD Pipeline With GitHub Actions

Automate the retraining process using GitHub Actions or another CI/CD tool. This pipeline should:

  1. Pull the latest data for model retraining.
  2. Update the model on the MLflow server.
  3. Redeploy the container if performance metrics drop below a threshold.
YAML
 
name: CI/CD Pipeline
on: [push]
jobs:
  build:
  runs-on: ubuntu-latest
  steps:
   - name: Checkout code
     uses: actions/checkout@v2
   - name: Build Docker image
     run: docker build -t model_image:latest .


2. Integrate With MLflow for Model Versioning

Each retrained model is logged to MLflow with a new version number. If the latest version outperforms the previous model, it is deployed automatically.

Step 6: Ensuring Security and Compliance

1. Data Encryption

Encrypt sensitive data at rest and in transit. Use tools like HashiCorp Vault to manage secrets securely.

2. Regular Audits and Model Explainability

To maintain compliance, set up regular audits and utilize explainability tools (like SHAP) for interpretable insights, ensuring the model meets ethical guidelines.

Wrapping Up

After following these steps, you’ll have a robust MLOps pipeline capable of managing LLMs, RAG models, and real-time monitoring for scalable production environments. This framework supports automatic retraining, scaling, and real-time responsiveness, which is crucial for modern AI applications.

MLOps large language model

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