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Step-by-Step Guide: Docker Build → Push to Docker Hub → Update Kubernetes Deployment

1. Prerequisites

Ensure the following:

  • Docker is installed and running
  • Docker Hub account is active
  • A valid Dockerfile exists in your project directory
  • You have access to gemini-deployment.yml (Kubernetes manifest)
  • Docker Hub Personal Access Token (PAT) generated if 2FA is enabled

2. Authenticate with Docker Hub Using a PAT

  1. Go to: https://app.docker.com/settings/personal-access-tokens
  2. Create a New Access Token with Read, write, and delete permissions
  3. Copy the token securely

Login via terminal:

docker login -u <your-dockerhub-username>

Paste your access token when prompted for password.

3. Build the Docker Image

From the directory containing the Dockerfile, build your image:

docker build -t gemini-clone .

This creates a local image with the name gemini-clone.

4. Tag the Image for Docker Hub

Tag your local image to match the format required by Docker Hub:

docker tag gemini-clone <your-dockerhub-username>/gemini-clone:latest

Example:

docker tag gemini-clone amitabhsoni/gemini-clone:latest

5. Push the Tagged Image to Docker Hub

docker push <your-dockerhub-username>/gemini-clone:latest

Example:

docker push amitabhsoni/gemini-clone:latest

6. Update the Kubernetes Deployment (gemini-deployment.yml)

Open the deployment file and set the container image to the pushed version:

containers:
  - name: gemini
    image: <existing-docker-image>

Example:

containers:
  - name: gemini
    image: <your-dockerhub-username>/<docker-image-name>:<image-version>