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Upload IP Address to S3#

This guide explains how to create a bash script that runs after your Linux server boots up. The script will get the IP address, create a JSON file, and upload it to an AWS S3 bucket.

Files#

/usr/bin/system_info.sh#

/usr/bin/system_info.sh
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#!/bin/bash
print_header() {
    local title="$1"
    echo "------------------------------------------------------------------------"
    echo "       $title          "
    echo "------------------------------------------------------------------------"
}

# Get the IP address and datetime in ISO format
echo "Datetime: $(date -u +'%Y-%m-%dT%H:%M:%SZ')"
echo "Hostname: $(hostname)"
echo "IP: $(hostname -I | awk '{print $1}')"
echo ""

# Check if virsh is installed
if command -v virsh &> /dev/null
then
    print_header "LIST OF VIRTUAL MACHINES"
    virsh list --all
fi

print_header "FILE SYSTEM"
df -h

print_header "OPERATING SYSTEM INFORMATION"
cat /etc/os-release

print_header "CPU INFORMATION"
lscpu

print_header "MEMORY INFORMATION"
free -h

print_header "NETWORK INFORMATION"
ip a

print_header "IP ROUTES"
ip route

/usr/bin/upload_ip.sh#

This bash script gets the System Informations, creates a TXT file, and uploads it to an AWS S3 bucket.

Bash
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#!/bin/bash

export S3_BUCKET="your-s3-bucket-name"
export AWS_ACCESS_KEY_ID="access-key"
export AWS_SECRET_ACCESS_KEY="secret"

# Get the IP address and datetime in ISO format

# Create a JSON file with the IP address
INFO_FILE="host-$HOSTNAME.txt"
bash /usr/bin/system_info.sh > $INFO_FILE

# Upload the JSON file to an AWS S3 bucket
aws s3 cp $INFO_FILE s3://$S3_BUCKET/

# Clean up
rm $INFO_FILE

/etc/systemd/system/upload_ip.service#

This systemd service file runs the script at boot.

INI
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# filepath: /etc/systemd/system/upload_ip.service
[Unit]
Description=Upload IP address to S3
After=network.target

[Service]
ExecStart=/bin/bash /usr/bin/upload_ip.sh

[Install]
WantedBy=default.target

Enable and Start the Service#

Run the following commands to enable and start the service:

Bash
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chmod +x /usr/bin/system_info.sh
chmod +x /usr/bin/upload_ip.sh
sudo systemctl enable upload_ip.service
sudo systemctl start upload_ip.service

If you want an update every hour#

Bash
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echo "0 * * * * root /bin/bash /usr/bin/upload_ip.sh" | sudo tee /etc/cron.d/upload_ip