Deploy Gemma-7B using vLLM on Inferless
Gemma is a family of lightweight, state-of-the-art open models from Google, built from the same research and technology used to create the Gemini models.
Introduction
Google’s Gemma release introduces a family of four new LLMs, offered in two sizes (2B and 7B), with options for both base and instruction-tuned variants. Gemma 2B and 7B are trained on 6T tokens for 7B Gemma and 2T tokens for 2B Gemma respectively.
Gemma models exhibit robust performance across academic benchmarks for language understanding, reasoning, and safety. Additionally, they surpass similarly sized open models on 11 out of 18 text-based tasks.
Our Observations
We have deployed the gemma-7b base version of the model using vLLM on an A100 GPU(80GB). Here are our observations:
Inference Time | Cold Start Time | Token/Sec | Latency/Token | VRAM Required |
---|---|---|---|---|
3.99 sec | 16.62 sec | 62.51 | 16.01 ms | 67.83 GB |
Defining Dependencies
We are using the vLLM library, which boost the inference speed of you LLM. for deploying the gemma-7b base version of the model.
Constructing the GitHub/GitLab Template
Now quickly construct the GitHub/GitLab template, this process is mandatory and make sure you don’t add any file named model.py
.
You can also add other files to this directory.
Create the class for inference
In the app.py we will define the class and import all the required functions
-
def initialize
: In this function, you will initialize your model and the requiredvariables
. You can adjust thegpu_memory_utilization
parameter to reduce GPU usage. -
def infer
: This function gets called for every request that you send. Here you can define all the steps that are required for the inference. You can also pass custom values for inference and pass it throughinputs(dict)
parameter. -
def finalize
: This function cleans up all the allocated memory.
Create the Input Schema
We have to create a input_schema.py in your GitHub/Gitlab repository this will help us create the Input parameters. You can checkout our documentation on Input / Output Schema.
For this tutorial, we have defined a parameter prompt
which is required during the API call. Now lets create the input_schema.py
.
Creating the Custom Runtime
This is a mandatory step where we allow the users to upload their custom runtime through inferless-runtime-config.yaml.
Method A: Deploying the model on Inferless Platform
Inferless supports multiple ways of importing your model. For this tutorial, we will use GitHub.
Step 1: Login to the inferless dashboard can click on Import model button
Navigate to your desired workspace in Inferless and Click on Add a custom model
button that you see on the top right. An import wizard will open up.
Step 2: Follow the UI to complete the model Import
- Select the GitHub/GitLab Integration option to connect your source code repository with the deployment environment.
- Navigate to the specific GitHub repository that contains your model’s code. Here, you will need to identify and enter the name of the model you wish to import.
- Choose the appropriate type of machine that suits your model’s requirements. Additionally, specify the minimum and maximum number of replicas to define the scalability range for deploying your model.
- Optionally, you have the option to enable automatic build and deployment. This feature triggers a new deployment automatically whenever there is a new code push to your repository.
- If your model requires additional software packages, configure the Custom Runtime settings by including necessary pip or apt packages. Also, set up environment variables such as Inference Timeout, Container Concurrency, and Scale Down Timeout to tailor the runtime environment according to your needs.
- Wait for the validation process to complete, ensuring that all settings are correct and functional. Once validation is successful, click on the “Import” button to finalize the import of your model.
Step 3: Wait for the model build to complete usually takes ~5-10 minutes
Step 4: Use the APIs to call the model
Once the model is in ‘Active’ status you can click on the ‘API’ page to call the model
Here is the Demo:
Method B: Deploying the model on Inferless CLI
Inferless allows you to deploy your model using Inferless-CLI. Follow the steps to deploy using Inferless CLI.
Initialization of the model
Create the app.py and inferless-runtime-config.yaml, move the files to the working directory. Run the following command to initialize your model:
Upload the custom runtime
Once you have created the inferless-runtime-config.yaml file, you can run the following command:
Upon entering this command, you will be prompted to provide the configuration file name. Enter the name and ensure to update it in the inferless.yaml file. Now you are ready for the deployment.
Deploy the Model
Execute the following command to deploy your model. Once deployed, you can track the build logs on the Inferless platform: