github.com/anth0d/nomad@v0.0.0-20221214183521-ae3a0a2cad06/website/content/docs/job-specification/hcl2/functions/uuid/uuidv4.mdx (about)

     1  ---
     2  layout: docs
     3  page_title: v4 - uuid - Functions - Configuration Language
     4  description: The uuidv4 function generates a unique id.
     5  ---
     6  
     7  # `uuidv4` Function
     8  
     9  `uuidv4` generates a unique identifier string.
    10  
    11  The id is a generated and formatted as required by [RFC 4122 section
    12  4.4](https://tools.ietf.org/html/rfc4122#section-4.4), producing a Version 4
    13  UUID. The result is a UUID generated only from pseudo-random numbers.
    14  
    15  This function produces a new value each time it is called, and so using it
    16  directly in job arguments will result in spurious diffs. We do not
    17  recommend using the `uuidv4` function in resource configurations.
    18  
    19  ## Examples
    20  
    21  ```shell-session
    22  > uuidv4()
    23  b5ee72a3-54dd-c4b8-551c-4bdc0204cedb
    24  ```
    25  
    26  ## Related Functions
    27  
    28  - [`uuidv5`](/docs/job-specification/hcl2/functions/uuid/uuidv5), which generates name-based UUIDs.