S3 Sourced Config Example

aws-cli-install.sh

apt-get install -y zip unzip && \
    curl "https://s3.amazonaws.com/aws-cli/awscli-bundle.zip" -o "awscli-bundle.zip" && \
    unzip awscli-bundle.zip && \
    ./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws

environment_config.sh

#!/bin/bash

# Usage is by setting the GLOBAL_CONFIG environment variable 
# and/or the APP_CONFIG environment variable

# Global environment configuration
if [ -z "$GLOBAL_CONFIG" ]; then
    echo "No configuration file was defined. To define this, pass in the GLOBAL_CONFIG environment variable."
else
    echo "Configuration file was set to $GLOBAL_CONFIG"
    echo "Setting global environment variables from S3."
    
    while read line; do export "$line";
    done < <(aws s3 cp s3://$GLOBAL_CONFIG -)

    echo "Global environment setup complete."
fi

# App specific configuration 
if [ -z "$APP_CONFIG" ]; then
    echo "No app specicific configuration file was defined. To define this, pass in the APP_CONFIG environment variable."
else
    echo "Configuration file was set to $APP_CONFIG"
    echo "Setting app specific environment variables from S3."
    
    while read line; do export "$line";
    done < <(aws s3 cp s3://$APP_CONFIG -)

    echo "App environment setup complete."
fi