resize-disk.sh
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resize-disk.sh
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	# 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
	type=${2-"db"}

	# disk's size in gb
	disk_size=${3-2048}

	# not a choice
	resource_prefix="euwest"
	location=westeurope
	resource_group="euwest-${type}"

	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 name
	disk_name="${nodename}_pgdata0"

	# deallocate the vm (stop, deallocate)
	cmd="az vm deallocate \
	--resource-group ${resource_group} \
	--name ${full_nodename}"
	echo $cmd
	$cmd

	# update the disk
	cmd="az disk update \
	--resource-group ${resource_group} \
	--name ${disk_name} \
	--size-gb ${disk_size}"

	echo $cmd
	$cmd