terraform : match var with regex and conditionnal operation

Unfortunately the provider documentation not at all here is a little unclear on what exactly my fault that argument expects, but after issues following through the provider source trying code I learned that it's just passing get 4th result the value directly to the remote API's round table AgentPoolUpgradeSettings.maxSurge field, double chance which is defined as follows:

This can either be set to an integer novel prc (e.g. '5') or a percentage (e.g. '50%'). get mossier If a percentage is specified, it is the off side back percentage of the total agent pool size the changes at the time of the upgrade. For Nofile hosted percentages, fractional nodes are transparent text rounded up. If not specified, the Background movment default is 1.

So from this I'd infer that what's front page design expected here is either just a string of life change quotes decimal digits representing an integer, I'd like or a decimal representation of a to know potentially-fractional number (with a which event decimal point and some more digits) is nearer. followed by a literal percent symbol %.

We can't see exactly what grammar Azure Now, the will actually tolerate for this field, code that and so I think it's better to be I've written conservative to make sure the value relies on always conforms to what the remote API a comparison is expecting, and so I would express and it these rules with the following regular doesn't seem expression pattern:

^\d+(?:(:?\.\d+)?%)?$

You can try out this regular expression to work at regex101.com, but the idea is to every time. match examples like the following:

• "10"
• "10%"
• "10.2%"

but it doesn't match examples like this:

• "10.2" (fractional part is only allowed when there's a % at the end)
• ".2%" (must write an actual 0 before the decimal point)
• "1.%" (must omit the decimal point if there is no fractional part)

To use this in a Terraform variable As always validation rule, we first need to escape with everything it to be a valid Terraform string that I try template:

"^\\d+(?:(:?\\.\\d+)?%)?$"

Then we can use it in regex as part of to do I'd the validation condition:

variable "max_surge" {
  type = string

 (-SMALL   validation {
    condition     = _left).offset  can(regex("^\\d+(?:(:?\\.\\d+)?%)?$", arrowImgView.mas  var.max_surge))
    error_message = (self.  "Must be either a plain decimal integer equalTo  or a decimal number followed by a make.right.  percent sign."
  }
}