uninstall.sh

#!/usr/bin/env bash

function show_help() {
   # Display Help
   echo "Run this script to delete resources used to simulate a Purdue Network and its assets, including IoT Edge devices created in IoT Hub."
   echo
   echo "Syntax: ./uninstall.sh [-flag=value]"
   echo ""
   echo "List of mandatory flags:"
   echo "-hubrg     Azure Resource Group with the Azure IoT Hub."
   echo "-hubname   Name of the Azure IoT Hub controlling the IoT Edge devices."
   echo ""
   echo "List of optional flags:"
   echo "-h         Print this help."
   echo "-c         Path to configuration file with IoT Edge VMs information. Default: ./config.txt."
   echo "-s         Azure subscription ID to use to deploy resources. Default: use current subscription of Azure CLI."
   echo "-rg        Prefix used for all Azure Resource Groups created by the installation script. Default: iotedge4iiot."
   echo
}

#global variable
scriptFolder=$(dirname "$(readlink -f "$0")")

# Default settings / Initializing all option variables to avoid contamination by variables from the environment.
iotHubResourceGroup=""
iotHubName=""
configFilePath="./config.txt"
resourceGroupPrefix="iotedge4iiot"

while :; do
    case $1 in
        -h|-\?|--help)
            show_help
            exit;;
        -c=?*)
            configFilePath=${1#*=}
            if [ ! -f "${configFilePath}" ]; then
              echo "Configuration file not found. Exiting."
              exit 1
            fi;;
        -c=)
            echo "Missing configuration file path. Exiting."
            exit;;
        -hubrg=?*)
            iotHubResourceGroup=${1#*=}
            ;;
        -hubrg=)
            echo "Missing IoT Hub resource group. Exiting."
            exit;;
        -hubname=?*)
            iotHubName=${1#*=}
            ;;
        -hubname=)
            echo "Missing IoT Hub name. Exiting."
            exit;;
        -s=?*)
            subscription=${1#*=}
            ;;
        -s=)
            echo "Missing subscription. Exiting."
            exit;;
        -rg=?*)
            resourceGroupPrefix=${1#*=}
            ;;
        -rg=)
            echo "Missing resource group prefix. Exiting."
            exit;;
        --)
            shift
            break;;
        *)
            break
    esac
    shift
done

# Derived default settings
networkResourceGroupName="${resourceGroupPrefix}-RG-network"
iotedgeResourceGroupName="${resourceGroupPrefix}-RG-iotedge"

#Verifying that mandatory parameters are there
if [ -z $iotHubResourceGroup ]; then
    echo "Missing IoT Hub resource group. Exiting."
    exit 1
fi
if [ -z $iotHubName ]; then
    echo "Missing IoT Hub name. Exiting."
    exit 1
fi

echo "==========================================================="
echo "==	              Azure Subscription          	 =="
echo "==========================================================="
echo ""
if [ ! -z $subscription ]; then
  az account set --subscription $subscription
fi
subscriptionDetails=($(az account show --query '[id, name]' -o tsv))
subscription=${subscriptionDetails[0]}
subscriptionName=${subscriptionDetails[1]}
echo "Executing script with Azure Subscription: ${subscriptionName}" 
subscription=$(az account show --query 'name' -o tsv)

# Parse the configuration file
source ${scriptFolder}/scripts/parseConfigFile.sh $configFilePath

echo "Deleting all IoT Edge devices listed in the configuration file from IoT Hub..."
for (( i=0; i<${#iotEdgeDevices[@]}; i++))
do
    echo "...${iotEdgeDevices[i]}"
    az iot hub device-identity delete --device-id ${iotEdgeDevices[i]} --hub-name $iotHubName
done
echo "done"

echo "Deleting all resource groups..."
az group list --out tsv --tag $resourceGroupPrefix --query 'reverse(sort_by([], &tags.CreationDate)[*].name)' | while read line; do echo "...$line"; az group delete --yes --name $line; done
echo "done"

echo "==========================================================="
echo "==	   All resources have been removed             	 =="
echo "==========================================================="