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76 lines
2.7 KiB
76 lines
2.7 KiB
\section*{Appendix: Postinstall Scripts and Cloud-Init Configuration}
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\addcontentsline{toc}{section}{Appendix: Postinstall Scripts and Cloud-Init Configuration}
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This appendix includes the scripts and cloud-init configuration used to automate the setup of the farmer portal environment, including USB mounting and Wi-Fi hotspot broadcasting. Noted, this file can only be supported with Ubuntu Core OS.
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\subsection*{postinstall.sh}
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This script is designed to be executed on the host device (e.g., Raspberry Pi or Linux box) after the system is installed. It mounts a USB device labeled \texttt{MINIO\_USB} and starts a Wi-Fi hotspot using NetworkManager.
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\begin{lstlisting}[language=bash, caption={Postinstall Script for Mounting USB and Broadcasting Hotspot}]
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#!/bin/bash
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# === Mount USB Drive ===
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USB_LABEL="MINIO_USB"
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MOUNT_PATH="/mnt/usb2/minio-data"
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DEVICE=$(lsblk -o LABEL,NAME | grep "$USB_LABEL" | awk '{print "/dev/" $2}')
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if [ -z "$DEVICE" ]; then
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echo "❌ USB with label $USB_LABEL not found."
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exit 1
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fi
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echo "✅ Found USB device: $DEVICE"
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sudo mkdir -p "$MOUNT_PATH"
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sudo mount "$DEVICE" "$MOUNT_PATH"
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sudo chown -R $USER:$USER "$MOUNT_PATH"
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# === Setup Wi-Fi Hotspot ===
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SSID="FarmerPortal"
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PASSWORD="farmer123"
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INTERFACE="wlan0"
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echo "Starting Wi-Fi hotspot on $INTERFACE..."
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nmcli device wifi hotspot ifname $INTERFACE ssid $SSID password $PASSWORD
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echo "✅ Postinstall complete. Portal available at http://192.168.50.1:8080 or http://localhost:8080"
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\end{lstlisting}
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\subsection*{cloud-init.yaml}
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This file automates the postinstall process on first boot. It installs required packages, mounts the USB device, and enables the Wi-Fi hotspot automatically.
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\begin{lstlisting}[language=yaml, caption={Cloud-Init Configuration for Automated Setup}]
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#cloud-config
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package_update: true
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package_upgrade: true
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packages:
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- network-manager
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- dnsmasq
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- wireless-tools
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- net-tools
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write_files:
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- path: /usr/local/bin/postinstall.sh
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permissions: '0755'
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content: |
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#!/bin/bash
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USB_LABEL="MINIO_USB"
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MOUNT_PATH="/mnt/usb2/minio-data"
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DEVICE=$(lsblk -o LABEL,NAME | grep "$USB_LABEL" | awk '{print "/dev/" $2}')
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if [ -n "$DEVICE" ]; then
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mkdir -p "$MOUNT_PATH"
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mount "$DEVICE" "$MOUNT_PATH"
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chown -R ubuntu:ubuntu "$MOUNT_PATH"
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fi
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SSID="FarmerPortal"
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PASSWORD="farmer123"
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INTERFACE="wlan0"
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nmcli dev wifi hotspot ifname $INTERFACE ssid $SSID password $PASSWORD
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runcmd:
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- [ bash, /usr/local/bin/postinstall.sh ]
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\end{lstlisting}
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This setup ensures that the system is accessible both over Ethernet and via a self-hosted Wi-Fi hotspot, and that persistent object storage is available to services like MinIO on the mounted USB drive.
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