uuid Function
uuid generates a unique identifier string.
The id is a generated and formatted as required by RFC 4122 section 4.4 (opens in a new tab), 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 uuid function in resource configurations, but it can
be used with care in conjunction with
the ignore_changes lifecycle meta-argument.
In most cases we recommend using the random provider (opens in a new tab)
instead, since it allows the one-time generation of random values that are
then retained in the OpenTofu state for use by
future operations. In particular,
random_id (opens in a new tab) can generate results with
equivalent randomness to the uuid function.
Examples
> uuid()
b5ee72a3-54dd-c4b8-551c-4bdc0204cedbRelated Functions
uuidv5, which generates name-based UUIDs.