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terraform-azurerm-aks

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Terraform module composition (feature) for Azure Kubernetes Service

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# DEPRECATED - Azure Kubernetes Service
[![Changelog](https://img.shields.io/badge/changelog-release-green.svg)](https://raw.githubusercontent.com/claranet/terraform-azurerm-aks/master/CHANGELOG.md) [![Notice](https://img.shields.io/badge/notice-copyright-yellow.svg)](https://raw.githubusercontent.com/claranet/terraform-azurerm-aks/master/NOTICE) [![Apache V2 License](https://img.shields.io/badge/license-Apache%20V2-orange.svg)](https://raw.githubusercontent.com/claranet/terraform-azurerm-aks/master/LICENSE) [![TF Registry](https://img.shields.io/badge/terraform-registry-blue.svg)](https://registry.terraform.io/modules/claranet/aks/azurerm/)

> ⚠ This module is deprecated in favor of [aks-light](https://github.com/claranet/terraform-azurerm-aks-light) module.

This terraform module creates an [Azure Kubernetes Service](https://azure.microsoft.com/fr-fr/services/kubernetes-service/) and its associated [Azure Application Gateway](https://docs.microsoft.com/en-us/azure/application-gateway/ingress-controller-overview) as ingress controller.

Inside the cluster default node pool, [velero](https://velero.io/docs/) and [cert-manager](https://cert-manager.io/docs/) are installed.

Inside each node pool, [Kured](https://github.com/weaveworks/kured) is installed as a daemonset.

This module also configures logging to a [Log Analytics Workspace](https://docs.microsoft.com/en-us/azure/azure-monitor/learn/quick-create-workspace),
deploys the [Azure Active Directory Pod Identity](https://github.com/Azure/aad-pod-identity) and creates some
[Storage Classes](https://kubernetes.io/docs/concepts/storage/storage-classes/) with different types of Azure managed disks (Standard HDD retain and delete, Premium SSD retain and delete).

## Version compatibility

| Module version | Terraform version | AzureRM version |
| -------------- | ----------------- | --------------- |
| >= 5.x.x | 0.15.x & 1.0.x | >= 2.10 |
| >= 4.x.x | 0.13.x | >= 2.10 |
| >= 3.x.x | 0.12.x | >= 2.10 |
| >= 2.x.x | 0.12.x | < 2.0 |
| < 2.x.x | 0.11.x | < 2.0 |

## Usage

This module is optimized to work with the [Claranet terraform-wrapper](https://github.com/claranet/terraform-wrapper) too which set some terraform variables in the environment needed by this module.
More details about variables set by the `terraform wrapper` available in the [documentation](https://github.com/claranet/terraform-wrapper#environment).

The helm and kubernetes providers must be defined at the root level and then passed to the module via the provider block as in the examples.

## Global versioning rule for Claranet Azure modules

| Module version | Terraform version | AzureRM version |
| -------------- | ----------------- | --------------- |
| >= 7.x.x | 1.3.x | >= 3.0 |
| >= 6.x.x | 1.x | >= 3.0 |
| >= 5.x.x | 0.15.x | >= 2.0 |
| >= 4.x.x | 0.13.x / 0.14.x | >= 2.0 |
| >= 3.x.x | 0.12.x | >= 2.0 |
| >= 2.x.x | 0.12.x | < 2.0 |
| < 2.x.x | 0.11.x | < 2.0 |

## Contributing

If you want to contribute to this repository, feel free to use our [pre-commit](https://pre-commit.com/) git hook configuration
which will help you automatically update and format some files for you by enforcing our Terraform code module best-practices.

More details are available in the [CONTRIBUTING.md](./CONTRIBUTING.md#pull-request-process) file.

## Usage

This module is optimized to work with the [Claranet terraform-wrapper](https://github.com/claranet/terraform-wrapper) tool
which set some terraform variables in the environment needed by this module.
More details about variables set by the `terraform-wrapper` available in the [documentation](https://github.com/claranet/terraform-wrapper#environment).

```hcl
locals {
  allowed_cidrs = ["x.x.x.x", "y.y.y.y"]
}

module "azure_region" {
  source  = "claranet/regions/azurerm"
  version = "x.x.x"

azure_region = var.azure_region
}

module "rg" {
  source  = "claranet/rg/azurerm"
  version = "x.x.x"

location    = module.azure_region.location
  client_name = var.client_name
  environment = var.environment
  stack       = var.stack
}

module "azure_virtual_network" {
  source  = "claranet/vnet/azurerm"
  version = "x.x.x"

environment    = var.environment
  location       = module.azure_region.location
  location_short = module.azure_region.location_short
  client_name    = var.client_name
  stack          = var.stack

resource_group_name = module.rg.resource_group_name

vnet_cidr = ["10.0.0.0/19"]
}

module "node_network_subnet" {
  source  = "claranet/subnet/azurerm"
  version = "x.x.x"

environment    = var.environment
  location_short = module.azure_region.location_short
  client_name    = var.client_name
  stack          = var.stack

resource_group_name  = module.rg.resource_group_name
  virtual_network_name = module.azure_virtual_network.virtual_network_name

name_suffix = "nodes"

subnet_cidr_list = ["10.0.0.0/20"]

service_endpoints = ["Microsoft.Storage"]
}

module "appgw_network_subnet" {
  source  = "claranet/subnet/azurerm"
  version = "x.x.x"

environment    = var.environment
  location_short = module.azure_region.location_short
  client_name    = var.client_name
  stack          = var.stack

resource_group_name  = module.rg.resource_group_name
  virtual_network_name = module.azure_virtual_network.virtual_network_name

name_suffix = "appgw"

subnet_cidr_list = ["10.0.20.0/24"]
}

module "global_run" {
  source  = "claranet/run/azurerm"
  version = "x.x.x"

client_name    = var.client_name
  location       = module.azure_region.location
  location_short = module.azure_region.location_short
  environment    = var.environment
  stack          = var.stack

monitoring_function_splunk_token = var.monitoring_function_splunk_token

resource_group_name = module.rg.resource_group_name

tenant_id = var.azure_tenant_id
}

resource "tls_private_key" "key" {
  algorithm = "RSA"
}

module "aks" {
  source  = "claranet/aks/azurerm"
  version = "x.x.x"

providers = {
    kubernetes = kubernetes.aks-module
    helm       = helm.aks-module
  }

client_name = var.client_name
  environment = var.environment
  stack       = var.stack

resource_group_name = module.rg.resource_group_name
  location            = module.azure_region.location
  location_short      = module.azure_region.location_short

private_cluster_enabled = false
  service_cidr            = "10.0.16.0/22"
  kubernetes_version      = "1.19.7"

vnet_id         = module.azure_virtual_network.virtual_network_id
  nodes_subnet_id = module.node_network_subnet.subnet_id
  nodes_pools = [
    {
      name            = "pool1"
      count           = 1
      vm_size         = "Standard_D1_v2"
      os_type         = "Linux"
      os_disk_type    = "Ephemeral"
      os_disk_size_gb = 30
      vnet_subnet_id  = module.node_network_subnet.subnet_id
    },
    {
      name                = "bigpool1"
      count               = 3
      vm_size             = "Standard_F8s_v2"
      os_type             = "Linux"
      os_disk_size_gb     = 30
      vnet_subnet_id      = module.node_network_subnet.subnet_id
      enable_auto_scaling = true
      min_count           = 3
      max_count           = 9
    }
  ]

linux_profile = {
    username = "nodeadmin"
    ssh_key  = tls_private_key.key.public_key_openssh
  }

oms_log_analytics_workspace_id = module.global_run.log_analytics_workspace_id
  azure_policy_enabled           = false

logs_destinations_ids = [module.global_run.log_analytics_workspace_id]

appgw_subnet_id = module.appgw_network_subnet.subnet_id

appgw_ingress_controller_values = { "verbosityLevel" = 5, "appgw.shared" = true }
  cert_manager_settings           = { "cainjector.nodeSelector.agentpool" = "default", "nodeSelector.agentpool" = "default", "webhook.nodeSelector.agentpool" = "default" }
  velero_storage_settings         = { allowed_cidrs = local.allowed_cidrs }

container_registries_id = [module.acr.acr_id]

key_vault_secrets_provider = {
    secret_rotation_enabled  = true
    secret_rotation_interval = "2m"
  }
}

module "acr" {
  source  = "claranet/acr/azurerm"
  version = "x.x.x"

location            = module.azure_region.location
  location_short      = module.azure_region.location_short
  resource_group_name = module.rg.resource_group_name
  sku                 = "Standard"

client_name = var.client_name
  environment = var.environment
  stack       = var.stack

logs_destinations_ids = [module.global_run.log_analytics_workspace_id]
}
```

## Providers

| Name | Version |
|------|---------|
| azuread | ~> 2.31 |
| azurecaf | ~> 1.2, >= 1.2.22 |
| azurerm | ~> 3.39 |

## Modules

| Name | Source | Version |
|------|--------|---------|
| appgw | ./tools/agic | n/a |
| certmanager | ./tools/cert-manager | n/a |
| diagnostic\_settings | claranet/diagnostic-settings/azurerm | ~> 6.5.0 |
| infra | ./modules/infra | n/a |
| kured | ./tools/kured | n/a |
| velero | ./tools/velero | n/a |

## Resources

| Name | Type |
|------|------|
| [azurerm_kubernetes_cluster.aks](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster) | resource |
| [azurerm_kubernetes_cluster_node_pool.node_pools](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster_node_pool) | resource |
| [azurerm_resource_policy_assignment.aks_policy_kubenet_aadpodidentity_assignment](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/resource_policy_assignment) | resource |
| [azurerm_role_assignment.aad_pod_identity_mio_appgw_identity](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aci_assignment](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_acr_pull_allowed](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_kubelet_uai_vnet_network_contributor](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_uai_private_dns_zone_contributor](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_uai_route_table_contributor](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_uai_vnet_network_contributor](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_role_assignment.aks_user_assigned](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/role_assignment) | resource |
| [azurerm_user_assigned_identity.aks_user_assigned_identity](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/user_assigned_identity) | resource |
| [azurerm_user_assigned_identity.appgw_assigned_identity](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/user_assigned_identity) | resource |
| [azuread_service_principal.aci_identity](https://registry.terraform.io/providers/hashicorp/azuread/latest/docs/data-sources/service_principal) | data source |
| [azurecaf_name.aks](https://registry.terraform.io/providers/aztfmod/azurecaf/latest/docs/data-sources/name) | data source |
| [azurecaf_name.aks_identity](https://registry.terraform.io/providers/aztfmod/azurecaf/latest/docs/data-sources/name) | data source |
| [azurecaf_name.appgw](https://registry.terraform.io/providers/aztfmod/azurecaf/latest/docs/data-sources/name) | data source |
| [azurecaf_name.appgw_identity](https://registry.terraform.io/providers/aztfmod/azurecaf/latest/docs/data-sources/name) | data source |
| [azurerm_policy_definition.aks_policy_kubenet_aadpodidentity_definition](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/policy_definition) | data source |
| [azurerm_subscription.current](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/subscription) | data source |
| [azurerm_virtual_network.aks_vnet](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/virtual_network) | data source |

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| aadpodidentity\_chart\_repository | AAD Pod Identity Helm chart repository URL | `string` | `"https://raw.githubusercontent.com/Azure/aad-pod-identity/master/charts"` | no |
| aadpodidentity\_chart\_version | AAD Pod Identity helm chart version to use | `string` | `"4.1.9"` | no |
| aadpodidentity\_custom\_name | Custom name for aad pod identity MSI | `string` | `"aad-pod-identity"` | no |
| aadpodidentity\_extra\_tags | Extra Tags to add to aad pod identity MSI | `map(string)` | `{}` | no |
| aadpodidentity\_kubenet\_policy\_enabled | Boolean to wether deploy or not a built-in Azure Policy at the cluster level to mitigate potential security issue with aadpodidentity used with kubenet : https://docs.microsoft.com/en-us/azure/aks/use-azure-ad-pod-identity#using-kubenet-network-plugin-with-azure-active-directory-pod-managed-identities " | `bool` | `false` | no |
| aadpodidentity\_namespace | Kubernetes namespace in which to deploy AAD Pod Identity | `string` | `"system-aadpodid"` | no |
| aadpodidentity\_values | Settings for AAD Pod identity helm Chart:<pre>map(object({ nmi.nodeSelector.agentpool = string mic.nodeSelector.agentpool = string azureIdentity.enabled = bool azureIdentity.type = string azureIdentity.resourceID = string azureIdentity.clientID = string nmi.micNamespace = string }))</pre> | `map(string)` | `{}` | no |
| aci\_subnet\_id | Optional subnet Id used for ACI virtual-nodes | `string` | `null` | no |
| agic\_chart\_repository | Helm chart repository URL | `string` | `"https://appgwingress.blob.core.windows.net/ingress-azure-helm-package/"` | no |
| agic\_chart\_version | Version of the Helm chart | `string` | `"1.5.2"` | no |
| agic\_enabled | Enable Application gateway ingress controller | `bool` | `true` | no |
| agic\_helm\_version | [DEPRECATED] Version of Helm chart to deploy | `string` | `null` | no |
| aks\_http\_proxy\_settings | AKS HTTP proxy settings. URLs must be in format `http(s)://fqdn:port/`. When setting the `no_proxy_url_list` parameter, the AKS Private Endpoint domain name and the AKS VNet CIDR must be added to the URLs list. | <pre>object({ http_proxy_url = optional(string) https_proxy_url = optional(string) no_proxy_url_list = optional(list(string), []) trusted_ca = optional(string) })</pre> | `null` | no |
| aks\_network\_plugin | AKS network plugin to use. Possible values are `azure` and `kubenet`. Changing this forces a new resource to be created | `string` | `"azure"` | no |
| aks\_network\_policy | AKS network policy to use. | `string` | `"calico"` | no |
| aks\_pod\_cidr | CIDR used by pods when network plugin is set to `kubenet`. https://docs.microsoft.com/en-us/azure/aks/configure-kubenet | `string` | `"172.17.0.0/16"` | no |
| aks\_route\_table\_id | Provide an existing route table when `outbound_type variable` is set to `userdefinedrouting` with kubenet : https://docs.microsoft.com/fr-fr/azure/aks/configure-kubenet#bring-your-own-subnet-and-route-table-with-kubenet | `string` | `null` | no |
| aks\_sku\_tier | aks sku tier. Possible values are Free ou Paid | `string` | `"Free"` | no |
| aks\_user\_assigned\_identity\_custom\_name | Custom name for the aks user assigned identity resource | `string` | `null` | no |
| aks\_user\_assigned\_identity\_resource\_group\_name | Resource Group where to deploy the aks user assigned identity resource. Used when private cluster is enabled and when Azure private dns zone is not managed by aks | `string` | `null` | no |
| aks\_user\_assigned\_identity\_tags | Tags to add to AKS MSI | `map(string)` | `{}` | no |
| api\_server\_authorized\_ip\_ranges | Ip ranges allowed to interract with Kubernetes API. Default no restrictions | `list(string)` | `[]` | no |
| appgw\_identity\_enabled | Configure a managed service identity for Application gateway used with AGIC (useful to configure ssl cert into appgw from keyvault) | `bool` | `false` | no |
| appgw\_ingress\_controller\_values | Application Gateway Ingress Controller settings | `map(string)` | `{}` | no |
| appgw\_private\_ip | Private IP for Application Gateway. Used when variable `private_ingress` is set to `true`. | `string` | `null` | no |
| appgw\_settings | Application gateway configuration settings. Default dummy configuration | `map(any)` | `{}` | no |
| appgw\_ssl\_certificates\_configs | Application gateway ssl certificates configuration | `list(map(string))` | `[]` | no |
| appgw\_subnet\_id | Application gateway subnet id | `string` | `""` | no |
| appgw\_user\_assigned\_identity\_custom\_name | Custom name for the application gateway user assigned identity resource | `string` | `null` | no |
| appgw\_user\_assigned\_identity\_resource\_group\_name | Resource Group where to deploy the Application Gateway User Assigned Identity resource. | `string` | `null` | no |
| application\_gateway\_id | ID of an existing Application Gateway to use as an AGIC. `use_existing_application_gateway` must be set to `true`. | `string` | `null` | no |
| auto\_scaler\_profile | Configuration of `auto_scaler_profile` block object | <pre>object({ balance_similar_node_groups = optional(bool, false) expander = optional(string, "random") max_graceful_termination_sec = optional(number, 600) max_node_provisioning_time = optional(string, "15m") max_unready_nodes = optional(number, 3) max_unready_percentage = optional(number, 45) new_pod_scale_up_delay = optional(string, "10s") scale_down_delay_after_add = optional(string, "10m") scale_down_delay_after_delete = optional(string, "10s") scale_down_delay_after_failure = optional(string, "3m") scan_interval = optional(string, "10s") scale_down_unneeded = optional(string, "10m") scale_down_unready = optional(string, "20m") scale_down_utilization_threshold = optional(number, 0.5) empty_bulk_delete_max = optional(number, 10) skip_nodes_with_local_storage = optional(bool, true) skip_nodes_with_system_pods = optional(bool, true) })</pre> | `null` | no |
| azure\_policy\_enabled | Should the Azure Policy Add-On be enabled? | `bool` | `false` | no |
| cert\_manager\_chart\_repository | Helm chart repository URL | `string` | `"https://charts.jetstack.io"` | no |
| cert\_manager\_chart\_version | Cert Manager helm chart version to use | `string` | `"v1.8.0"` | no |
| cert\_manager\_namespace | Kubernetes namespace in which to deploy Cert Manager | `string` | `"system-cert-manager"` | no |
| cert\_manager\_settings | Settings for cert-manager helm chart | `map(string)` | `{}` | no |
| client\_name | Client name/account used in naming | `string` | n/a | yes |
| container\_registries\_id | List of Azure Container Registries ids where AKS needs pull access. | `list(string)` | `[]` | no |
| custom\_aks\_name | Custom AKS name | `string` | `""` | no |
| custom\_appgw\_name | Custom name for AKS ingress application gateway | `string` | `""` | no |
| custom\_diagnostic\_settings\_name | Custom name of the diagnostics settings, name will be 'default' if not set. | `string` | `"default"` | no |
| default\_node\_pool | Default node pool configuration | <pre>object({ name = optional(string, "default") node_count = optional(number, 1) vm_size = optional(string, "Standard_D2_v3") os_type = optional(string, "Linux") workload_runtime = optional(string, null) zones = optional(list(number), [1, 2, 3]) enable_auto_scaling = optional(bool, false) min_count = optional(number, 1) max_count = optional(number, 10) type = optional(string, "VirtualMachineScaleSets") node_taints = optional(list(any), null) node_labels = optional(map(any), null) orchestrator_version = optional(string, null) priority = optional(string, null) enable_host_encryption = optional(bool, null) eviction_policy = optional(string, null) max_pods = optional(number, 30) os_disk_type = optional(string, "Managed") os_disk_size_gb = optional(number, 128) enable_node_public_ip = optional(bool, false) scale_down_mode = optional(string, "Delete") })</pre> | `{}` | no |
| default\_node\_pool\_tags | Specific tags for default node pool | `map(string)` | `{}` | no |
| default\_tags\_enabled | Option to enable or disable default tags | `bool` | `true` | no |
| docker\_bridge\_cidr | IP address for docker with Network CIDR. | `string` | `"172.16.0.1/16"` | no |
| enable\_cert\_manager | Enable cert-manager on AKS cluster | `bool` | `true` | no |
| enable\_kured | Enable kured daemon on AKS cluster | `bool` | `true` | no |
| enable\_pod\_security\_policy | Enable pod security policy or not. https://docs.microsoft.com/fr-fr/azure/AKS/use-pod-security-policies | `bool` | `false` | no |
| enable\_velero | Enable velero on AKS cluster | `bool` | `true` | no |
| environment | Project environment | `string` | n/a | yes |
| extra\_tags | Extra tags to add | `map(string)` | `{}` | no |
| http\_application\_routing\_enabled | Whether HTTP Application Routing is enabled. | `bool` | `false` | no |
| key\_vault\_secrets\_provider | Enable AKS built-in Key Vault secrets provider. If enabled, an identity is created by the AKS itself and exported from this module. | <pre>object({ secret_rotation_enabled = optional(bool) secret_rotation_interval = optional(string) })</pre> | `null` | no |
| kubernetes\_version | Version of Kubernetes to deploy | `string` | `"1.17.9"` | no |
| kured\_chart\_repository | Helm chart repository URL | `string` | `"https://kubereboot.github.io/charts"` | no |
| kured\_chart\_version | Version of the Helm chart | `string` | `"2.2.0"` | no |
| kured\_settings | Settings for kured helm chart:<pre>map(object({ image.repository = string image.tag = string image.pullPolicy = string extraArgs.reboot-days = string extraArgs.start-time = string extraArgs.end-time = string extraArgs.time-zone = string rbac.create = string podSecurityPolicy.create = string serviceAccount.create = string autolock.enabled = string }))</pre> | `map(string)` | `{}` | no |
| linux\_profile | Username and ssh key for accessing AKS Linux nodes with ssh. | <pre>object({ username = string, ssh_key = string })</pre> | `null` | no |
| location | Azure region to use | `string` | n/a | yes |
| location\_short | Short name of Azure regions to use | `string` | n/a | yes |
| logs\_categories | Log categories to send to destinations. | `list(string)` | `null` | no |
| logs\_destinations\_ids | List of destination resources IDs for logs diagnostic destination. Can be `Storage Account`, `Log Analytics Workspace` and `Event Hub`. No more than one of each can be set. If you want to specify an Azure EventHub to send logs and metrics to, you need to provide a formated string with both the EventHub Namespace authorization send ID and the EventHub name (name of the queue to use in the Namespace) separated by the `|` character. | `list(string)` | n/a | yes |
| logs\_kube\_audit\_enabled | Whether to include `kube-audit` and `kube-audit-admin` logs from diagnostics settings collection. Enabling this can increase your Azure billing. | `bool` | `false` | no |
| logs\_metrics\_categories | Metrics categories to send to destinations. | `list(string)` | `null` | no |
| name\_prefix | Optional prefix for the generated name | `string` | `""` | no |
| name\_suffix | Optional suffix for the generated name | `string` | `""` | no |
| node\_pool\_tags | Specific tags for node pool | `map(string)` | `{}` | no |
| node\_resource\_group | Name of the resource group in which to put AKS nodes. If null default to MC\_<AKS RG Name> | `string` | `null` | no |
| nodes\_pools | A list of nodes pools to create, each item supports same properties as `local.default_agent_profile` | `list(any)` | `[]` | no |
| nodes\_subnet\_id | ID of the subnet used for nodes | `string` | n/a | yes |
| oidc\_issuer\_enabled | Whether to enable OpenID Connect issuer or not. https://learn.microsoft.com/en-us/azure/aks/use-oidc-issuer | `bool` | `false` | no |
| oms\_log\_analytics\_workspace\_id | The ID of the Log Analytics Workspace used to send OMS logs | `string` | n/a | yes |
| outbound\_type | The outbound (egress) routing method which should be used for this Kubernetes Cluster. Possible values are `loadBalancer` and `userDefinedRouting`. | `string` | `"loadBalancer"` | no |
| private\_cluster\_enabled | Configure AKS as a Private Cluster: https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster#private_cluster_enabled | `bool` | `true` | no |
| private\_dns\_zone\_id | Id of the private DNS Zone when <private\_dns\_zone\_type> is custom | `string` | `null` | no |
| private\_dns\_zone\_role\_assignment\_enabled | Option to enable or disable Private DNS Zone role assignment. | `bool` | `true` | no |
| private\_dns\_zone\_type | Set AKS private dns zone if needed and if private cluster is enabled (privatelink.<region>.azmk8s.io) - "Custom" : You will have to deploy a private Dns Zone on your own and pass the id with <private\_dns\_zone\_id> variable If this settings is used, aks user assigned identity will be "userassigned" instead of "systemassigned" and the aks user must have "Private DNS Zone Contributor" role on the private DNS Zone - "System" : AKS will manage the private zone and create it in the same resource group as the Node Resource Group - "None" : In case of None you will need to bring your own DNS server and set up resolving, otherwise cluster will have issues after provisioning. https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/kubernetes_cluster#private_dns_zone_id | `string` | `"System"` | no |
| private\_ingress | Private ingress boolean variable. When `true`, the default http listener will listen on private IP instead of the public IP. | `bool` | `false` | no |
| resource\_group\_name | Name of the AKS resource group | `string` | n/a | yes |
| service\_cidr | CIDR used by kubernetes services (kubectl get svc). | `string` | n/a | yes |
| stack | Project stack name | `string` | n/a | yes |
| use\_caf\_naming | Use the Azure CAF naming provider to generate default resource name. `custom_aks_name` override this if set. Legacy default name is used if this is set to `false`. | `bool` | `true` | no |
| use\_existing\_application\_gateway | True to use an existing Application Gateway instead of creating a new one. If true you may use `appgw_ingress_controller_values = { appgw.shared = true }` to tell AGIC to not erase the whole Application Gateway configuration with its own configuration. You also have to deploy AzureIngressProhibitedTarget CRD. https://github.com/Azure/application-gateway-kubernetes-ingress/blob/072626cb4e37f7b7a1b0c4578c38d1eadc3e8701/docs/setup/install-existing.md#multi-cluster--shared-app-gateway | `bool` | `false` | no |
| velero\_chart\_repository | URL of the Helm chart repository | `string` | `"https://vmware-tanzu.github.io/helm-charts"` | no |
| velero\_chart\_version | Velero helm chart version to use | `string` | `"2.29.5"` | no |
| velero\_identity\_custom\_name | Name of the Velero MSI | `string` | `"velero"` | no |
| velero\_identity\_extra\_tags | Extra tags to add to velero MSI | `map(string)` | `{}` | no |
| velero\_namespace | Kubernetes namespace in which to deploy Velero | `string` | `"system-velero"` | no |
| velero\_storage\_settings | Settings for Storage account and blob container for Velero | <pre>object({ name = optional(string) resource_group_name = optional(string) location = optional(string) account_tier = optional(string) account_replication_type = optional(string) tags = optional(map(any)) allowed_cidrs = optional(list(string)) allowed_subnet_ids = optional(list(string)) container_name = optional(string) })</pre> | `{}` | no |
| velero\_values | Settings for Velero helm chart:<pre>map(object({ configuration.backupStorageLocation.bucket = string configuration.backupStorageLocation.config.resourceGroup = string configuration.backupStorageLocation.config.storageAccount = string configuration.backupStorageLocation.name = string configuration.provider = string configuration.volumeSnapshotLocation.config.resourceGroup = string configuration.volumeSnapshotLocation.name = string credential.exstingSecret = string credentials.useSecret = string deployRestic = string env.AZURE_CREDENTIALS_FILE = string metrics.enabled = string rbac.create = string schedules.daily.schedule = string schedules.daily.template.includedNamespaces = string schedules.daily.template.snapshotVolumes = string schedules.daily.template.ttl = string serviceAccount.server.create = string snapshotsEnabled = string initContainers[0].name = string initContainers[0].image = string initContainers[0].volumeMounts[0].mountPath = string initContainers[0].volumeMounts[0].name = string image.repository = string image.tag = string image.pullPolicy = string }))</pre> | `map(string)` | `{}` | no |
| vnet\_id | Vnet id that Aks MSI should be network contributor in a private cluster | `string` | `null` | no |

## Outputs

| Name | Description |
|------|-------------|
| aad\_pod\_identity\_azure\_identity | Identity object for AAD Pod Identity |
| aad\_pod\_identity\_namespace | Namespace used for AAD Pod Identity |
| agic\_namespace | Namespace used for AGIC |
| aks\_id | AKS resource id |
| aks\_kube\_config | Kube configuration of AKS Cluster |
| aks\_kube\_config\_raw | Raw kube config to be used by kubectl command |
| aks\_kubelet\_user\_managed\_identity | The Kubelet User Managed Identity used by the AKS cluster. |
| aks\_name | Name of the AKS cluster |
| aks\_nodes\_pools\_ids | Ids of AKS nodes pools |
| aks\_nodes\_pools\_names | Names of AKS nodes pools |
| aks\_nodes\_rg | Name of the resource group in which AKS nodes are deployed |
| aks\_user\_managed\_identity | The User Managed Identity used by the AKS cluster. |
| application\_gateway\_id | Id of the application gateway used by AKS |
| application\_gateway\_identity\_principal\_id | Id of the managed service identity of the application gateway used by AKS |
| application\_gateway\_name | Name of the application gateway used by AKS |
| cert\_manager\_namespace | Namespace used for Cert Manager |
| key\_vault\_secrets\_provider\_identity | The User Managed Identity used by the Key Vault secrets provider. |
| kured\_namespace | Namespace used for Kured |
| oidc\_issuer\_url | The URL of the OpenID Connect issuer. |
| public\_ip\_id | Id of the public ip used by AKS application gateway |
| public\_ip\_name | Name of the public ip used by AKS application gateway |
| velero\_identity | Azure Identity used for Velero pods |
| velero\_namespace | Namespace used for Velero |
| velero\_storage\_account | Storage Account on which Velero data is stored. |
| velero\_storage\_account\_container | Container in Storage Account on which Velero data is stored. |

## Related documentation

- Azure Kubernetes Service documentation : [docs.microsoft.com/en-us/azure/aks/](https://docs.microsoft.com/en-us/azure/aks/)
- Azure Kubernetes Service MSI Usage : [docs.microsoft.com/en-us/azure/aks/use-managed-identity](https://docs.microsoft.com/en-us/azure/aks/use-managed-identity)
- Azure Kubernetes Service User-Defined Route usage : [docs.microsoft.com/en-us/azure/aks/egress-outboundtype](https://docs.microsoft.com/en-us/azure/aks/egress-outboundtype)
- Terraform Kubernetes provider documentation: [www.terraform.io/docs/providers/kubernetes/index.html](https://www.terraform.io/docs/providers/kubernetes/index.html)
- Terraform Helm provider documentation: [www.terraform.io/docs/providers/helm/index.html](https://www.terraform.io/docs/providers/helm/index.html)
- Kured documentation: [github.com/weaveworks/kured](https://github.com/weaveworks/kured)
- Velero documentation: [velero.io/docs/v1.2.0/](https://velero.io/docs/)
- Velero Azure specific documentation: [github.com/vmware-tanzu/velero-plugin-for-microsoft-azure](https://github.com/vmware-tanzu/velero-plugin-for-microsoft-azure)
- cert-manager documentation : [cert-manager.io/docs/](https://cert-manager.io/docs/)

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