Hcl2 input variables, local variables and functions (#8588)
Mainly redefine or reused what Terraform did.
* allow to used `variables`, `variable` and `local` blocks
* import the following functions and their docs from Terraform: abs, abspath, basename, base64decode, base64encode, bcrypt, can, ceil, chomp, chunklist, cidrhost, cidrnetmask, cidrsubnet, cidrsubnets, coalesce, coalescelist, compact, concat, contains, convert, csvdecode, dirname, distinct, element, file, fileexists, fileset, flatten, floor, format, formatdate, formatlist, indent, index, join, jsondecode, jsonencode, keys, length, log, lookup, lower, max, md5, merge, min, parseint, pathexpand, pow, range, reverse, rsadecrypt, setintersection, setproduct, setunion, sha1, sha256, sha512, signum, slice, sort, split, strrev, substr, timestamp, timeadd, title, trim, trimprefix, trimspace, trimsuffix, try, upper, urlencode, uuidv4, uuidv5, values, yamldecode, yamlencode, zipmap.
2020-02-06 11:49:21 +01:00
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---
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2020-03-18 18:46:47 -04:00
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page_title: v4 - uuid - Functions - Configuration Language
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description: The uuidv4 function generates a unique id.
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Hcl2 input variables, local variables and functions (#8588)
Mainly redefine or reused what Terraform did.
* allow to used `variables`, `variable` and `local` blocks
* import the following functions and their docs from Terraform: abs, abspath, basename, base64decode, base64encode, bcrypt, can, ceil, chomp, chunklist, cidrhost, cidrnetmask, cidrsubnet, cidrsubnets, coalesce, coalescelist, compact, concat, contains, convert, csvdecode, dirname, distinct, element, file, fileexists, fileset, flatten, floor, format, formatdate, formatlist, indent, index, join, jsondecode, jsonencode, keys, length, log, lookup, lower, max, md5, merge, min, parseint, pathexpand, pow, range, reverse, rsadecrypt, setintersection, setproduct, setunion, sha1, sha256, sha512, signum, slice, sort, split, strrev, substr, timestamp, timeadd, title, trim, trimprefix, trimspace, trimsuffix, try, upper, urlencode, uuidv4, uuidv5, values, yamldecode, yamlencode, zipmap.
2020-02-06 11:49:21 +01:00
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---
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# `uuidv4` Function
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`uuidv4` generates a unique identifier string.
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The id is a generated and formatted as required by [RFC 4122 section
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4.4](https://tools.ietf.org/html/rfc4122#section-4.4), producing a Version 4
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UUID. The result is a UUID generated only from pseudo-random numbers.
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This function produces a new value each time it is called, and so using it
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directly in resource arguments will result in spurious diffs. We do not
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recommend using the `uuidv4` function in resource configurations.
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## Examples
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2020-05-29 17:12:05 -04:00
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```shell-session
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Hcl2 input variables, local variables and functions (#8588)
Mainly redefine or reused what Terraform did.
* allow to used `variables`, `variable` and `local` blocks
* import the following functions and their docs from Terraform: abs, abspath, basename, base64decode, base64encode, bcrypt, can, ceil, chomp, chunklist, cidrhost, cidrnetmask, cidrsubnet, cidrsubnets, coalesce, coalescelist, compact, concat, contains, convert, csvdecode, dirname, distinct, element, file, fileexists, fileset, flatten, floor, format, formatdate, formatlist, indent, index, join, jsondecode, jsonencode, keys, length, log, lookup, lower, max, md5, merge, min, parseint, pathexpand, pow, range, reverse, rsadecrypt, setintersection, setproduct, setunion, sha1, sha256, sha512, signum, slice, sort, split, strrev, substr, timestamp, timeadd, title, trim, trimprefix, trimspace, trimsuffix, try, upper, urlencode, uuidv4, uuidv5, values, yamldecode, yamlencode, zipmap.
2020-02-06 11:49:21 +01:00
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> uuidv4()
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b5ee72a3-54dd-c4b8-551c-4bdc0204cedb
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```
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## Related Functions
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2021-01-15 09:18:39 -08:00
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- [`uuidv5`](/docs/templates/hcl_templates/functions/uuid/uuidv5), which generates name-based UUIDs.
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