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Discussion on: Terraform: Variable validation with samples

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entscheidungsproblem profile image
entscheidungsproblem • • Edited

This is a great article, thanks!

I've found that the IPV4 method fails for /32 ips:

> cidrhost("0.0.0.0/32",32)
╷
│ Error: Error in function call
│ 
│   on <console-input> line 1:
│   (source code not available)
│ 
│ Call to function "cidrhost" failed: prefix of 32 does not accommodate a host numbered 32.
╵
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But by replacing 32 with 0 as the second argument, it works:

> cidrhost("0.0.0.0/32",0)
"0.0.0.0"
> cidrhost("0.0.0.0/0",0)
"0.0.0.0"
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This also works for IPv6:

> cidrhost("0000:0000:0000:0000:0000:0000:0000:0001/128",0)
"::1"
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drewmullen profile image
drewmullen •

oh man that is a great find! thank you for reporting. cited you as well! :cheers: