add-disk.sh
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add-disk.sh
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	#!/bin/sh

	# This script is used to attach data disk
	# to for example node destined to be postgres replica

	# node's name defined by the user
	nodename=${1-"dbreplica1"}

	# type of node (worker, db, etc...)
	type=${2-"db"}

	# not a choice
	resource_prefix="euwest"
	location=westeurope

	full_nodename="${nodename}-${resource_prefix}"

	# Depending on the types, we compute the resource group
	# worker, db, storage have dedicated shared resource group
	# other can be specifically tailored for them
	if [ $type = 'worker' ]; then # for workers, it's a shared resource
	resource_group="${resource_prefix}-${type}s"
	elif [ $type = 'db' ]; then # for dbs as well
	resource_group="${resource_prefix}-${type}"
	full_nodename="${nodename}"
	elif [ $type = 'storage' ]; then
	resource_group="${resource_prefix}-server"
	else # for other node types (webapp), that is specifically tailored for
	resource_group="${resource_prefix}-${nodename}"
	fi

	# disk's size in gb
	disk_size=${3-1024}

	# disk's name derivative from the vm we attach it too
	disk_name="${nodename}_pgdata0"

	# actually attach the disk
	# this will create the disk if it does not exist
	cmd="az vm disk attach \
	--resource-group ${resource_group} \
	--vm-name ${full_nodename} \
	--disk ${disk_name} \
	--size-gb ${disk_size} \
	--new"

	echo $cmd
	$cmd