Filter a map when string not matched?

Terraform
1

Hi. I’m just getting started with Terraform and I’m stuck on what seems like a simple and common thing.
I have an input variable that’s a list I’m pulling in from a json file with jsdondecode().
I would like to execute a resource for everything in the list and then execute another resource for a subset of the list where the name doesn’t match a string.
I’ve found the regexall() function and have it working with a positive match, but I can’t get it working with a negative match.

host_data = jsondecode(file("${path.module}/test_hosts.json"))
looks like this:
[
    {
        "name":  "hostname01.derp.net",
        "ccode":  "aaaa"
    },
    {
        "name":  "hostname01-idrac.derp.net",
        "ccode":  "aaaa"
    },
...truncated...
]

This statement works to create a map from “host_data” that positively matches the string “idrac”.

new_host_map = {for val in local.host_data : val["name"] => val if length(regexall("idrac", val["name"])) > 0}

What I need is to NOT match the string “idrac”. How can I do this?
I have tried several permutations with no luck like:

new_host_map = {for val in local.host_data : val["name"] => val if length(regexall("(?U:idrac)", val["name"])) > 0}
new_host_map = {for val in local.host_data : val["name"] => val if length(regexall("(?!idrac)", val["name"])) > 0}

Thanks for any suggestions,
Jeremy

2

Um, why are you so intent on doing the negation inside the regex? Just use the logical NOT operator (!) in the Terraform expression.

3

Geez…I’m an idiot. Thank you.

new_host_map = {for val in local.host_data : val["name"] => val if !(length(regexall("idrac", val["name"])) > 0})