Add support for DNS routing policies
This commit is contained in:
Julio Castillo
parent
c4d599f321
commit
8bacd8f5d5
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@ -53,25 +53,59 @@ module "private-dns" {
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}
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# tftest modules=1 resources=1
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```
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### Routing Policies
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```hcl
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module "private-dns" {
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source = "./fabric/modules/dns"
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project_id = "myproject"
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type = "private"
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name = "test-example"
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domain = "test.example."
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client_networks = [var.vpc.self_link]
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recordsets = {
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"A regular" = { records = ["10.20.0.1"] }
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"A geo" = {
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geo_routing = [
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{ location = "europe-west1", records = ["10.0.0.1"] },
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{ location = "europe-west2", records = ["10.0.0.2"] },
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{ location = "europe-west3", records = ["10.0.0.3"] }
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]
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}
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"A wrr" = {
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ttl = 600
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wrr_routing = [
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{ weight = 0.6, records = ["10.10.0.1"] },
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{ weight = 0.2, records = ["10.10.0.2"] },
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{ weight = 0.2, records = ["10.10.0.3"] }
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]
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}
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}
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}
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# tftest modules=1 resources=4
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```
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<!-- BEGIN TFDOC -->
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## Variables
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| name | description | type | required | default |
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|---|---|:---:|:---:|:---:|
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| [domain](variables.tf#L51) | Zone domain, must end with a period. | <code>string</code> | ✓ | |
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| [name](variables.tf#L69) | Zone name, must be unique within the project. | <code>string</code> | ✓ | |
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| [project_id](variables.tf#L80) | Project id for the zone. | <code>string</code> | ✓ | |
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| [domain](variables.tf#L53) | Zone domain, must end with a period. | <code>string</code> | ✓ | |
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| [name](variables.tf#L71) | Zone name, must be unique within the project. | <code>string</code> | ✓ | |
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| [project_id](variables.tf#L82) | Project id for the zone. | <code>string</code> | ✓ | |
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| [client_networks](variables.tf#L21) | List of VPC self links that can see this zone. | <code>list(string)</code> | | <code>[]</code> |
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| [description](variables.tf#L28) | Domain description. | <code>string</code> | | <code>"Terraform managed."</code> |
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| [dnssec_config](variables.tf#L34) | DNSSEC configuration for this zone. | <code title="object({ non_existence = optional(string, "nsec3") state = string key_signing_key = optional(object( { algorithm = string, key_length = number }), { algorithm = "rsasha256", key_length = 2048 } ) zone_signing_key = optional(object( { algorithm = string, key_length = number }), { algorithm = "rsasha256", key_length = 1024 } ) })">object({…})</code> | | <code>null</code> |
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| [enable_logging](variables.tf#L62) | Enable query logging for this zone. Only valid for public zones. | <code>bool</code> | | <code>false</code> |
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| [forwarders](variables.tf#L56) | Map of {IPV4_ADDRESS => FORWARDING_PATH} for 'forwarding' zone types. Path can be 'default', 'private', or null for provider default. | <code>map(string)</code> | | <code>{}</code> |
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| [peer_network](variables.tf#L74) | Peering network self link, only valid for 'peering' zone types. | <code>string</code> | | <code>null</code> |
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| [recordsets](variables.tf#L85) | Map of DNS recordsets in \"type name\" => {ttl, [records]} format. | <code title="map(object({ ttl = optional(number, 300) records = list(string) }))">map(object({…}))</code> | | <code>{}</code> |
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| [service_directory_namespace](variables.tf#L102) | Service directory namespace id (URL), only valid for 'service-directory' zone types. | <code>string</code> | | <code>null</code> |
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| [type](variables.tf#L108) | Type of zone to create, valid values are 'public', 'private', 'forwarding', 'peering', 'service-directory'. | <code>string</code> | | <code>"private"</code> |
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| [zone_create](variables.tf#L118) | Create zone. When set to false, uses a data source to reference existing zone. | <code>bool</code> | | <code>true</code> |
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| [dnssec_config](variables.tf#L34) | DNSSEC configuration for this zone. | <code title="object({ non_existence = optional(string, "nsec3") state = string key_signing_key = optional(object( { algorithm = string, key_length = number }), { algorithm = "rsasha256", key_length = 2048 } ) zone_signing_key = optional(object( { algorithm = string, key_length = number }), { algorithm = "rsasha256", key_length = 1024 } ) })">object({…})</code> | | <code title="{ state = "off" }">{…}</code> |
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| [enable_logging](variables.tf#L64) | Enable query logging for this zone. Only valid for public zones. | <code>bool</code> | | <code>false</code> |
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| [forwarders](variables.tf#L58) | Map of {IPV4_ADDRESS => FORWARDING_PATH} for 'forwarding' zone types. Path can be 'default', 'private', or null for provider default. | <code>map(string)</code> | | <code>{}</code> |
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| [peer_network](variables.tf#L76) | Peering network self link, only valid for 'peering' zone types. | <code>string</code> | | <code>null</code> |
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| [recordsets](variables.tf#L87) | Map of DNS recordsets in \"type name\" => {ttl, [records]} format. | <code title="map(object({ ttl = optional(number, 300) records = optional(list(string)) geo_routing = optional(list(object({ location = string records = list(string) }))) wrr_routing = optional(list(object({ weight = number records = list(string) }))) }))">map(object({…}))</code> | | <code>{}</code> |
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| [service_directory_namespace](variables.tf#L122) | Service directory namespace id (URL), only valid for 'service-directory' zone types. | <code>string</code> | | <code>null</code> |
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| [type](variables.tf#L128) | Type of zone to create, valid values are 'public', 'private', 'forwarding', 'peering', 'service-directory'. | <code>string</code> | | <code>"private"</code> |
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| [zone_create](variables.tf#L138) | Create zone. When set to false, uses a data source to reference existing zone. | <code>bool</code> | | <code>true</code> |
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## Outputs
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@ -15,10 +15,25 @@
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*/
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locals {
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recordsets = {
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_recordsets = {
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for key, attrs in var.recordsets :
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key => merge(attrs, zipmap(["type", "name"], split(" ", key)))
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}
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geo_recordsets = {
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for k, v in local._recordsets :
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k => v
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if v.geo_routing != null
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}
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recordsets = {
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for k, v in local._recordsets :
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k => v
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if v.records != null
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}
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wrr_recordsets = {
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for k, v in local._recordsets :
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k => v
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if v.wrr_routing != null
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}
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zone = (
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var.zone_create
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? try(
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@ -166,6 +181,87 @@ resource "google_dns_record_set" "cloud-static-records" {
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type = each.value.type
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ttl = each.value.ttl
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rrdatas = each.value.records
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depends_on = [
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google_dns_managed_zone.non-public, google_dns_managed_zone.public
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]
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}
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resource "google_dns_record_set" "cloud-geo-records" {
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for_each = (
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var.type == "public" || var.type == "private"
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? local.geo_recordsets
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: {}
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)
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project = var.project_id
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managed_zone = var.name
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name = (
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each.value.name == ""
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? var.domain
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: (
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substr(each.value.name, -1, 1) == "."
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? each.value.name
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: "${each.value.name}.${var.domain}"
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)
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)
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type = each.value.type
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ttl = each.value.ttl
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dynamic "routing_policy" {
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for_each = each.value.geo_routing != null ? [1] : [0]
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iterator = unused
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content {
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dynamic "geo" {
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for_each = each.value.geo_routing
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iterator = policy
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content {
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location = policy.value.location
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rrdatas = policy.value.records
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}
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}
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}
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}
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depends_on = [
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google_dns_managed_zone.non-public, google_dns_managed_zone.public
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]
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}
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resource "google_dns_record_set" "cloud-wrr-records" {
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for_each = (
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var.type == "public" || var.type == "private"
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? local.wrr_recordsets
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: {}
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)
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project = var.project_id
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managed_zone = var.name
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name = (
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each.value.name == ""
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? var.domain
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: (
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substr(each.value.name, -1, 1) == "."
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? each.value.name
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: "${each.value.name}.${var.domain}"
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)
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)
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type = each.value.type
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ttl = each.value.ttl
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dynamic "routing_policy" {
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for_each = each.value.wrr_routing != null ? [1] : [0]
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iterator = unused
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content {
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dynamic "wrr" {
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for_each = each.value.wrr_routing
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iterator = policy
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content {
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weight = policy.value.weight
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rrdatas = policy.value.records
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}
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}
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}
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}
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depends_on = [
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google_dns_managed_zone.non-public, google_dns_managed_zone.public
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]
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@ -45,7 +45,9 @@ variable "dnssec_config" {
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{ algorithm = "rsasha256", key_length = 1024 }
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)
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})
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default = null
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default = {
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state = "off"
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}
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}
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variable "domain" {
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@ -86,17 +88,35 @@ variable "recordsets" {
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description = "Map of DNS recordsets in \"type name\" => {ttl, [records]} format."
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type = map(object({
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ttl = optional(number, 300)
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records = list(string)
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records = optional(list(string))
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geo_routing = optional(list(object({
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location = string
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records = list(string)
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})))
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wrr_routing = optional(list(object({
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weight = number
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records = list(string)
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})))
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}))
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default = {}
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nullable = false
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validation {
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condition = alltrue([
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for k, v in var.recordsets == null ? {} : var.recordsets :
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for k, v in coalesce(var.recordsets, {}) :
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length(split(" ", k)) == 2
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])
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error_message = "Recordsets must have keys in the format \"type name\"."
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}
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validation {
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condition = alltrue([
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for k, v in coalesce(var.recordsets, {}) : (
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(v.records != null && v.wrr_routing == null && v.geo_routing == null) ||
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(v.records == null && v.wrr_routing != null && v.geo_routing == null) ||
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(v.records == null && v.wrr_routing == null && v.geo_routing != null)
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)
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])
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error_message = "Only one of records, wrr_routing or geo_routing can be defined for each recordset."
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}
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}
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variable "service_directory_namespace" {
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