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helmfile HCL templates add CIDR functions

Introduced 2026-03-02 · score 0.97

HOW TO USE IT

When templating IP addresses or subnet ranges from HCL in Helmfile v1.4.0, use `cidrhost`, `cidrnetmask`, `cidrsubnet`, or `cidrsubnets` with the required arguments for the calculation. [HCL Functions](https://github.com/helmfile/helmfile/blob/v1.4.0/docs/hcl_funcs.md)

cidrhost("10.0.0.0/8", 2)
cidrsubnet("10.0.0.0/8", 8, 2)
cidrsubnets("10.0.0.0/8", 4, 4)

WHY THIS HELPS

Template static IP addresses or subnet ranges for Kubernetes resources from HCL in a Helmfile repository.

REQUIREMENTS AND LIMITATIONS

  • Version: v1.4.0
  • cidrhost(prefix, hostnum): `prefix` (required): IP network address prefix.
  • cidrhost(prefix, hostnum): `hostnum` (required): Host number within the prefix.
  • cidrnetmask(prefix): `prefix` (required): IPv4 address prefix in CIDR notation.
  • cidrsubnet(prefix, newbits, netnum): `prefix` (required): IP network address prefix.
  • cidrsubnet(prefix, newbits, netnum): `newbits` (required): Number of bits used to extend the prefix.
  • cidrsubnet(prefix, newbits, netnum): `netnum` (required): Subnet number within the prefix.
  • cidrsubnets(prefix, newbits...): `prefix` (required): CIDR prefix containing the consecutive ranges.
  • cidrsubnets(prefix, newbits...): `newbits...` (required): One or more bit counts for the ranges to calculate.
  • The release describes these functions as additions to Helmfile's supported HCL functions.

FIRST-PARTY EVIDENCE

Check the installed version and the source before using it. Entry JSON

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