packer-cn/website/source/docs/configuration/from-1.5/functions/uuid/uuidv4.html.md

layout	page_title	sidebar_current	description
docs	v4 - uuid - Functions - Configuration Language	configuration-functions-uuid-uuidv4	The uuidv4 function generates a unique id.

uuidv4 Function

uuidv4 generates a unique identifier string.

The id is a generated and formatted as required by RFC 4122 section 4.4, producing a Version 4 UUID. The result is a UUID generated only from pseudo-random numbers.

This function produces a new value each time it is called, and so using it directly in resource arguments will result in spurious diffs. We do not recommend using the uuidv4 function in resource configurations.

Examples

> uuidv4()
b5ee72a3-54dd-c4b8-551c-4bdc0204cedb

Related Functions

• uuidv5, which generates name-based UUIDs.