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279
examples/complete/components/terraform/mixins/context.tf
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,279 @@ | ||
| # | ||
| # ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label | ||
| # All other instances of this file should be a copy of that one | ||
| # | ||
| # | ||
| # Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf | ||
| # and then place it in your Terraform module to automatically get | ||
| # Cloud Posse's standard configuration inputs suitable for passing | ||
| # to Cloud Posse modules. | ||
| # | ||
| # curl -sL https://raw.githubusercontent.com/cloudposse/terraform-null-label/master/exports/context.tf -o context.tf | ||
| # | ||
| # Modules should access the whole context as `module.this.context` | ||
| # to get the input variables with nulls for defaults, | ||
| # for example `context = module.this.context`, | ||
| # and access individual variables as `module.this.<var>`, | ||
| # with final values filled in. | ||
| # | ||
| # For example, when using defaults, `module.this.context.delimiter` | ||
| # will be null, and `module.this.delimiter` will be `-` (hyphen). | ||
| # | ||
|
|
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| module "this" { | ||
| source = "cloudposse/label/null" | ||
| version = "0.25.0" # requires Terraform >= 0.13.0 | ||
|
|
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| enabled = var.enabled | ||
| namespace = var.namespace | ||
| tenant = var.tenant | ||
| environment = var.environment | ||
| stage = var.stage | ||
| name = var.name | ||
| delimiter = var.delimiter | ||
| attributes = var.attributes | ||
| tags = var.tags | ||
| additional_tag_map = var.additional_tag_map | ||
| label_order = var.label_order | ||
| regex_replace_chars = var.regex_replace_chars | ||
| id_length_limit = var.id_length_limit | ||
| label_key_case = var.label_key_case | ||
| label_value_case = var.label_value_case | ||
| descriptor_formats = var.descriptor_formats | ||
| labels_as_tags = var.labels_as_tags | ||
|
|
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| context = var.context | ||
| } | ||
|
|
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| # Copy contents of cloudposse/terraform-null-label/variables.tf here | ||
|
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| variable "context" { | ||
| type = any | ||
| default = { | ||
| enabled = true | ||
| namespace = null | ||
| tenant = null | ||
| environment = null | ||
| stage = null | ||
| name = null | ||
| delimiter = null | ||
| attributes = [] | ||
| tags = {} | ||
| additional_tag_map = {} | ||
| regex_replace_chars = null | ||
| label_order = [] | ||
| id_length_limit = null | ||
| label_key_case = null | ||
| label_value_case = null | ||
| descriptor_formats = {} | ||
| # Note: we have to use [] instead of null for unset lists due to | ||
| # https://github.com/hashicorp/terraform/issues/28137 | ||
| # which was not fixed until Terraform 1.0.0, | ||
| # but we want the default to be all the labels in `label_order` | ||
| # and we want users to be able to prevent all tag generation | ||
| # by setting `labels_as_tags` to `[]`, so we need | ||
| # a different sentinel to indicate "default" | ||
| labels_as_tags = ["unset"] | ||
| } | ||
| description = <<-EOT | ||
| Single object for setting entire context at once. | ||
| See description of individual variables for details. | ||
| Leave string and numeric variables as `null` to use default value. | ||
| Individual variable settings (non-null) override settings in context object, | ||
| except for attributes, tags, and additional_tag_map, which are merged. | ||
| EOT | ||
|
|
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| validation { | ||
| condition = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"]) | ||
| error_message = "Allowed values: `lower`, `title`, `upper`." | ||
| } | ||
|
|
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| validation { | ||
| condition = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"]) | ||
| error_message = "Allowed values: `lower`, `title`, `upper`, `none`." | ||
| } | ||
| } | ||
|
|
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| variable "enabled" { | ||
| type = bool | ||
| default = null | ||
| description = "Set to false to prevent the module from creating any resources" | ||
| } | ||
|
|
||
| variable "namespace" { | ||
| type = string | ||
| default = null | ||
| description = "ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique" | ||
| } | ||
|
|
||
| variable "tenant" { | ||
| type = string | ||
| default = null | ||
| description = "ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for" | ||
| } | ||
|
|
||
| variable "environment" { | ||
| type = string | ||
| default = null | ||
| description = "ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'" | ||
| } | ||
|
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| variable "stage" { | ||
| type = string | ||
| default = null | ||
| description = "ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'" | ||
| } | ||
|
|
||
| variable "name" { | ||
| type = string | ||
| default = null | ||
| description = <<-EOT | ||
| ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. | ||
| This is the only ID element not also included as a `tag`. | ||
| The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | ||
| EOT | ||
| } | ||
|
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| variable "delimiter" { | ||
| type = string | ||
| default = null | ||
| description = <<-EOT | ||
| Delimiter to be used between ID elements. | ||
| Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | ||
| EOT | ||
| } | ||
|
|
||
| variable "attributes" { | ||
| type = list(string) | ||
| default = [] | ||
| description = <<-EOT | ||
| ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`, | ||
| in the order they appear in the list. New attributes are appended to the | ||
| end of the list. The elements of the list are joined by the `delimiter` | ||
| and treated as a single ID element. | ||
| EOT | ||
| } | ||
|
|
||
| variable "labels_as_tags" { | ||
| type = set(string) | ||
| default = ["default"] | ||
| description = <<-EOT | ||
| Set of labels (ID elements) to include as tags in the `tags` output. | ||
| Default is to include all labels. | ||
| Tags with empty values will not be included in the `tags` output. | ||
| Set to `[]` to suppress all generated tags. | ||
| **Notes:** | ||
| The value of the `name` tag, if included, will be the `id`, not the `name`. | ||
| Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be | ||
| changed in later chained modules. Attempts to change it will be silently ignored. | ||
| EOT | ||
| } | ||
|
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| variable "tags" { | ||
| type = map(string) | ||
| default = {} | ||
| description = <<-EOT | ||
| Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`). | ||
| Neither the tag keys nor the tag values will be modified by this module. | ||
| EOT | ||
| } | ||
|
|
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| variable "additional_tag_map" { | ||
| type = map(string) | ||
| default = {} | ||
| description = <<-EOT | ||
| Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`. | ||
| This is for some rare cases where resources want additional configuration of tags | ||
| and therefore take a list of maps with tag key, value, and additional configuration. | ||
| EOT | ||
| } | ||
|
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| variable "label_order" { | ||
| type = list(string) | ||
| default = null | ||
| description = <<-EOT | ||
| The order in which the labels (ID elements) appear in the `id`. | ||
| Defaults to ["namespace", "environment", "stage", "name", "attributes"]. | ||
| You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | ||
| EOT | ||
| } | ||
|
|
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| variable "regex_replace_chars" { | ||
| type = string | ||
| default = null | ||
| description = <<-EOT | ||
| Terraform regular expression (regex) string. | ||
| Characters matching the regex will be removed from the ID elements. | ||
| If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | ||
| EOT | ||
| } | ||
|
|
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| variable "id_length_limit" { | ||
| type = number | ||
| default = null | ||
| description = <<-EOT | ||
| Limit `id` to this many characters (minimum 6). | ||
| Set to `0` for unlimited length. | ||
| Set to `null` for keep the existing setting, which defaults to `0`. | ||
| Does not affect `id_full`. | ||
| EOT | ||
| validation { | ||
| condition = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0 | ||
| error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length." | ||
| } | ||
| } | ||
|
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| variable "label_key_case" { | ||
| type = string | ||
| default = null | ||
| description = <<-EOT | ||
| Controls the letter case of the `tags` keys (label names) for tags generated by this module. | ||
| Does not affect keys of tags passed in via the `tags` input. | ||
| Possible values: `lower`, `title`, `upper`. | ||
| Default value: `title`. | ||
| EOT | ||
|
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| validation { | ||
| condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case) | ||
| error_message = "Allowed values: `lower`, `title`, `upper`." | ||
| } | ||
| } | ||
|
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| variable "label_value_case" { | ||
| type = string | ||
| default = null | ||
| description = <<-EOT | ||
| Controls the letter case of ID elements (labels) as included in `id`, | ||
| set as tag values, and output by this module individually. | ||
| Does not affect values of tags passed in via the `tags` input. | ||
| Possible values: `lower`, `title`, `upper` and `none` (no transformation). | ||
| Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs. | ||
| Default value: `lower`. | ||
| EOT | ||
|
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| validation { | ||
| condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case) | ||
| error_message = "Allowed values: `lower`, `title`, `upper`, `none`." | ||
| } | ||
| } | ||
|
|
||
| variable "descriptor_formats" { | ||
| type = any | ||
| default = {} | ||
| description = <<-EOT | ||
| Describe additional descriptors to be output in the `descriptors` output map. | ||
| Map of maps. Keys are names of descriptors. Values are maps of the form | ||
| `{ | ||
| format = string | ||
| labels = list(string) | ||
| }` | ||
| (Type is `any` so the map values can later be enhanced to provide additional options.) | ||
| `format` is a Terraform format string to be passed to the `format()` function. | ||
| `labels` is a list of labels, in order, to pass to `format()` function. | ||
| Label values will be normalized before being passed to `format()` so they will be | ||
| identical to how they appear in `id`. | ||
| Default is `{}` (`descriptors` output will be empty). | ||
| EOT | ||
| } | ||
|
|
||
| #### End of copy of cloudposse/terraform-null-label/variables.tf |
32 changes: 32 additions & 0 deletions
32
examples/complete/components/terraform/mixins/introspection.mixin.tf
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| # This mixin is meant to be added to Terraform components in order to append a `Component` tag to all resources in the | ||
| # configuration, specifying which component the resources belong to. | ||
| # | ||
| # It's important to note that all modules and resources within the component then need to use `module.introspection.context` | ||
| # and `module.introspection.tags`, respectively, rather than `module.this.context` and `module.this.tags`. | ||
| # | ||
|
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| locals { | ||
| # Throw an error if lookup fails | ||
| check_required_tags = module.this.enabled ? [ | ||
| for k in var.required_tags : | ||
| lookup(module.this.tags, k) | ||
| ] : [] | ||
| } | ||
|
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| variable "required_tags" { | ||
| type = list(string) | ||
| description = "List of required tag names" | ||
| default = [] | ||
| } | ||
|
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| # `introspection` module will contain the additional tags | ||
| module "introspection" { | ||
| source = "cloudposse/label/null" | ||
| version = "0.25.0" | ||
|
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| tags = merge(var.tags, { | ||
| "Component" = basename(abspath(path.module)) | ||
| }) | ||
|
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| context = module.this.context | ||
| } |
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