converts multi part ami's into ova

ami-to-ova.sh

#!/bin/bash

# Ensure the script exits on error
set -e

# Function to check if a command exists
function command_exists() {
    command -v "$1" &> /dev/null
}

# Variables
OVFTOOL_URL="https://github.com/rgl/ovftool-binaries/raw/main/archive/VMware-ovftool-4.6.0-21452615-lin.x86_64.zip"
OVFTOOL_ZIP="VMware-ovftool.zip"
INSTALL_DIR="/usr/local/ovftool"
AMI_ID="$1"
OUTPUT_OVF="output.ova"
WORK_DIR="/tmp/ami_conversion"

# Ensure an AMI ID is provided
if [ -z "$AMI_ID" ]; then
    echo "Usage: $0 <AMI_ID>"
    exit 1
fi

# Detect OS
if [ -f /etc/os-release ]; then
    . /etc/os-release
    OS="$ID"
else
    echo "Unable to detect operating system. Exiting."
    exit 1
fi

echo "Detected operating system: $OS"

# Update and install dependencies
case "$OS" in
    "ubuntu")
        echo "Updating packages for Ubuntu..."
        sudo apt update -y
        sudo apt upgrade -y

        echo "Installing dependencies for Ubuntu..."
        sudo apt install -y awscli qemu-utils tar wget unzip jq
        ;;
    "amzn" | "amazon")
        echo "Updating packages for Amazon Linux..."
        sudo yum update -y

        echo "Installing dependencies for Amazon Linux..."
        sudo yum install -y aws-cli qemu-img tar wget unzip jq
        ;;
    *)
        echo "Unsupported operating system: $OS"
        exit 1
        ;;
esac

# Download and install OVF Tool
if ! command_exists ovftool; then
    echo "Downloading OVF Tool from $OVFTOOL_URL..."
    wget -O "$OVFTOOL_ZIP" "$OVFTOOL_URL"
    echo "Extracting OVF Tool..."
    sudo mkdir -p "$INSTALL_DIR"
    sudo unzip -o "$OVFTOOL_ZIP" -d "$INSTALL_DIR"
    rm -f "$OVFTOOL_ZIP"

    echo "Adding OVF Tool to PATH..."
    if ! grep -q "export PATH=\$PATH:$INSTALL_DIR" ~/.bashrc; then
        echo "export PATH=\$PATH:$INSTALL_DIR" >> ~/.bashrc
        source ~/.bashrc
    fi
else
    echo "VMware OVFTool is already installed."
fi

# Prepare working directory
mkdir -p "$WORK_DIR"
cd "$WORK_DIR"

# Get AMI information
echo "Fetching AMI information..."
INSTANCE_ID=$(aws ec2 run-instances --image-id "$AMI_ID" --count 1 --instance-type t2.micro --query 'Instances[0].InstanceId' --output text)
echo "Launched instance: $INSTANCE_ID"

echo "Waiting for instance to initialize..."
aws ec2 wait instance-running --instance-ids "$INSTANCE_ID"

# Attach volumes to instance
echo "Fetching block device mappings..."
BLOCK_DEVICES=$(aws ec2 describe-instances --instance-ids "$INSTANCE_ID" --query 'Reservations[0].Instances[0].BlockDeviceMappings[*].Ebs.VolumeId' --output text)

for VOLUME_ID in $BLOCK_DEVICES; do
    echo "Attaching volume: $VOLUME_ID"
    aws ec2 detach-volume --volume-id "$VOLUME_ID"
    aws ec2 attach-volume --volume-id "$VOLUME_ID" --instance-id "$INSTANCE_ID" --device /dev/sdf
done

# Create disk images
DISK_INDEX=1
for DEVICE in $(ls /dev/xvd* | grep -v xvda); do
    echo "Creating disk image for $DEVICE..."
    qemu-img convert -O raw "$DEVICE" "disk$DISK_INDEX.raw"
    DISK_INDEX=$((DISK_INDEX + 1))
done

# Convert raw disks to OVF
echo "Converting disks to OVF..."
ovftool --diskMode=monolithicSparse --name="AMI_OVF" *.raw "$OUTPUT_OVF"

# Cleanup
echo "Terminating instance..."
aws ec2 terminate-instances --instance-ids "$INSTANCE_ID"

echo "Conversion complete. OVF saved as $OUTPUT_OVF."

Features:

• OS Detection: Automatically detects and installs dependencies on Amazon Linux or Ubuntu.
• Dependency Management: Ensures aws-cli, qemu-img, wget, unzip, and ovftool are installed.
• Multi-Disk Handling: Converts all attached volumes of the AMI to raw images and packs them into an OVF.
• Automatic Cleanup: Terminates the instance after conversion.

Notes:

• Ensure the AWS CLI is configured with appropriate permissions to run EC2 instances and manage volumes.
• Modify the instance type (t2.micro) in the script as needed based on your AMI requirements.
• The script assumes all volumes are accessible and uses /dev/xvd* for disk devices. Adjust as needed for your environment.