add support for additive IAM roles to KMS (#417)
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@ -17,7 +17,7 @@ module "kms" {
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source = "./modules/kms"
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project_id = "my-project"
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iam = {
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"roles/owner" = ["user:user1@example.com"]
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"roles/cloudkms.admin" = ["user:user1@example.com"]
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}
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keyring = { location = "europe-west1", name = "test" }
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keyring_create = false
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@ -32,9 +32,21 @@ module "kms" {
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module "kms" {
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source = "./modules/kms"
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project_id = "my-project"
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iam_additive = {
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"roles/cloudkms.cryptoKeyEncrypterDecrypter" = [
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"user:user1@example.com", "user:user2@example.com"
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]
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}
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key_iam = {
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key-a = {
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"roles/owner" = ["user:user1@example.com"]
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"roles/cloudkms.admin" = ["user:user3@example.com"]
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}
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}
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key_iam_additive = {
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key-b = {
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"roles/cloudkms.cryptoKeyEncrypterDecrypter" = [
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"user:user4@example.com", "user:user5@example.com"
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]
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}
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}
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keyring = { location = "europe-west1", name = "test" }
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@ -44,7 +56,7 @@ module "kms" {
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key-c = { rotation_period = null, labels = { env = "test" } }
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}
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}
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# tftest:modules=1:resources=5
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# tftest:modules=1:resources=9
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```
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### Crypto key purpose
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@ -77,8 +89,10 @@ module "kms" {
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|---|---|:---:|:---:|:---:|
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| keyring | Keyring attributes. | <code title="object({ location = string name = string })">object({…})</code> | ✓ | |
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| project_id | Project id where the keyring will be created. | <code>string</code> | ✓ | |
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| iam | Keyring IAM bindings for topic in {ROLE => [MEMBERS]} format. | <code>map(list(string))</code> | | <code>{}</code> |
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| key_iam | Key IAM bindings for topic in {KEY => {ROLE => [MEMBERS]}} format. | <code>map(map(list(string)))</code> | | <code>{}</code> |
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| iam | Keyring IAM bindings in {ROLE => [MEMBERS]} format. | <code>map(list(string))</code> | | <code>{}</code> |
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| iam_additive | Keyring IAM additive bindings in {ROLE => [MEMBERS]} format. | <code>map(list(string))</code> | | <code>{}</code> |
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| key_iam | Key IAM bindings in {KEY => {ROLE => [MEMBERS]}} format. | <code>map(map(list(string)))</code> | | <code>{}</code> |
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| key_iam_additive | Key IAM additive bindings in {ROLE => [MEMBERS]} format. | <code>map(map(list(string)))</code> | | <code>{}</code> |
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| key_purpose | Per-key purpose, if not set defaults will be used. If purpose is not `ENCRYPT_DECRYPT` (the default), `version_template.algorithm` is required. | <code title="map(object({ purpose = string version_template = object({ algorithm = string protection_level = string }) }))">map(object({…}))</code> | | <code>{}</code> |
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| key_purpose_defaults | Defaults used for key purpose when not defined at the key level. If purpose is not `ENCRYPT_DECRYPT` (the default), `version_template.algorithm` is required. | <code title="object({ purpose = string version_template = object({ algorithm = string protection_level = string }) })">object({…})</code> | | <code title="{ purpose = null version_template = null }">{…}</code> |
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| keyring_create | Set to false to manage keys and IAM bindings in an existing keyring. | <code>bool</code> | | <code>true</code> |
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@ -97,3 +111,6 @@ module "kms" {
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<!-- END TFDOC -->
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@ -15,6 +15,25 @@
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*/
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locals {
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iam_additive_members = flatten([
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for role, members in var.iam_additive : [
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for member in members : {
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member = member
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role = role
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}
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]
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])
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key_iam_additive_members = flatten([
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for key, roles in var.key_iam_additive : [
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for role, members in roles : [
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for member in members : {
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key = key
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member = member
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role = role
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}
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]
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]
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])
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key_iam_members = flatten([
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for key, roles in var.key_iam : [
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for role, members in roles : {
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@ -57,6 +76,16 @@ resource "google_kms_key_ring_iam_binding" "default" {
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members = each.value
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}
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resource "google_kms_key_ring_iam_member" "default" {
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for_each = {
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for binding in local.iam_additive_members :
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"${binding.role}${binding.member}" => binding
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}
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key_ring_id = local.keyring.id
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role = each.value.role
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member = each.value.member
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}
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resource "google_kms_crypto_key" "default" {
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for_each = var.keys
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key_ring = local.keyring.id
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@ -82,3 +111,13 @@ resource "google_kms_crypto_key_iam_binding" "default" {
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crypto_key_id = google_kms_crypto_key.default[each.value.key].id
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members = each.value.members
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}
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resource "google_kms_crypto_key_iam_member" "default" {
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for_each = {
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for binding in local.key_iam_additive_members :
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"${binding.key}.${binding.role}${binding.member}" => binding
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}
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role = each.value.role
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crypto_key_id = google_kms_crypto_key.default[each.value.key].id
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member = each.value.member
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}
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@ -15,13 +15,25 @@
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*/
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variable "iam" {
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description = "Keyring IAM bindings for topic in {ROLE => [MEMBERS]} format."
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description = "Keyring IAM bindings in {ROLE => [MEMBERS]} format."
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type = map(list(string))
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default = {}
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}
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variable "iam_additive" {
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description = "Keyring IAM additive bindings in {ROLE => [MEMBERS]} format."
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type = map(list(string))
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default = {}
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}
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variable "key_iam" {
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description = "Key IAM bindings for topic in {KEY => {ROLE => [MEMBERS]}} format."
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description = "Key IAM bindings in {KEY => {ROLE => [MEMBERS]}} format."
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type = map(map(list(string)))
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default = {}
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}
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variable "key_iam_additive" {
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description = "Key IAM additive bindings in {ROLE => [MEMBERS]} format."
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type = map(map(list(string)))
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default = {}
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}
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