Docker Image Update Script - Quick Guide

This script automates the process of checking for updates to a Docker image from DockerHub, and updating the container if needed.

Prerequisites

To run this script, ensure the following software is installed on the target machine:

1. Docker: Required to manage containers.
2. jq: A tool to process JSON (used to parse DockerHub API responses).
3. Curl: Required to fetch data from DockerHub.

Install jq (if not installed):

sudo apt-get install jq -y    # For Ubuntu/Debian
sudo yum install jq -y        # For RHEL/CentOS

How to Run

1. Download or create the script.
2. Change VALIDATOR_ENV_PATH to your path.
3. Make the script executable:

chmod +x image_update.sh

4. Run the script

./image_update.sh

This will:

• Check if the elixirprotocol/validator:v3 image is outdated.
• If an update is found, the script will stop the current container, pull the latest image, restart the container, and clean up unused images.