Required tags rule

[jtaylor100]

A feature request:

Something similar to what was stated in terraform-linters/tflint#150 and implemented in terraform-linters/tflint#617 but for Azure resources.

In the config, you should be able to specify a tags attribute in the config block:

config {
    tags = ["foo", "bar"]
}

All the Azure resources with tags supported would be checked for tags matching these keys and a lint fail would occur for resources without those tags.

[wata727]

@guybartal

As a Terraform developer I would like to be noticed when I missed required tags resources
so I won't forget to add those when I add new resources in Terraform module
adding this rule with help solve this issue: https://github.com/orgs/microsoft/projects/232

I think that such an issue should be solved by an approach like default_tags in AWS, but it seems a little difficult for Azure. hashicorp/terraform-provider-azurerm#13776
In the meantime, I don't think it's a bad idea to support such functionality in TFLint.

If you're interested in implementing such a rule, I would like to support it wherever possible.

[guybartal]

already implemented that based on AWS rule :)
I'll soon open a PR, would appreciate if you will review and approve it @wata727.