Data Server Updates (#185)

sassoftware · Aug 18, 2021 · f414906 · f414906
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diff --git a/Dockerfile b/Dockerfile
@@ -15,7 +15,7 @@ RUN apk --update --no-cache add git openssh \
   && chmod 755 ./kubectl /viya4-iac-azure/docker-entrypoint.sh \
   && mv ./kubectl /usr/local/bin/kubectl \
   && chmod g=u -R /etc/passwd /etc/group /viya4-iac-azure \
-  && chdir /viya4-iac-azure ; terraform init
+  && terraform init
 
 ENV TF_VAR_iac_tooling=docker
 ENTRYPOINT ["/viya4-iac-azure/docker-entrypoint.sh"]

diff --git a/docs/CONFIG-VARS.md b/docs/CONFIG-VARS.md
@@ -19,7 +19,7 @@ Supported configuration variables are listed in the tables below.  All variables
     - [NFS Server VM (only when `storage_type=standard`)](#nfs-server-vm-only-when-storage_typestandard)
     - [Azure NetApp Files (only when `storage_type=ha`)](#azure-netapp-files-only-when-storage_typeha)
   - [Azure Container Registry (ACR)](#azure-container-registry-acr)
-  - [PostgreSQL](#postgresql)
+  - [Postgres Servers](#postgres-servers)
 
 Terraform input variables can be set in the following ways:
 
@@ -298,20 +298,54 @@ When `storage_type=ha` (high availability), [Microsoft Azure NetApp Files](https
 | container_registry_admin_enabled | Enables the admin user | bool | false | |
 | container_registry_geo_replica_locs | List of Azure locations where the container registry should be geo-replicated. | list of strings | null | This is only supported when `container_registry_sku` is set to `"Premium"`. |
 
-## PostgreSQL
+## Postgres Servers
+
+When setting up ***external database servers***, you must provide information about those servers in the `postgres_servers` variable block. Each entry in the variable block represents a ***single database server***.
+
+This code only configures database servers. No databases are created during the infrastructure setup.
+
+The variable has the following format:
+
+```terraform
+postgres_servers = {
+  default = {},
+  ...
+}
+```
+
+**NOTE**: The `default = {}` elements is always required when creating external databases. This is the systems default database server.
+
+Each server element, like `foo = {}`, can contain none, some, or all of the parameters listed below:
 
 | Name | Description | Type | Default | Notes |
 | :--- | ---: | ---: | ---: | ---: |
-| create_postgres | Create an Azure Database for PostgreSQL server instance | bool | false | |
-| postgres_sku_name| The SKU Name for the PostgreSQL Server | string | "GP_Gen5_32" | The name pattern is the SKU, followed by the tier + family + cores (e.g. B_Gen4_1, GP_Gen5_4).|
-| postgres_storage_mb | Max storage allowed for the PostgreSQL server. | number | 51200 | Possible values are between 5120 MB(5GB) and 1048576 MB(1TB) for the Basic SKU and between 5120 MB(5GB) and 4194304 MB(4TB) for General Purpose/Memory Optimized SKUs |
-| postgres_backup_retention_days | Backup retention days for the PostgreSQL server. | number | 7 | Supported values are between 7 and 35 days. |
-| postgres_geo_redundant_backup_enabled | Whether to enable Geo-redundant for server backup. | bool | false | Not supported for the basic tier. |
-| postgres_administrator_login | The Administrator Login for the PostgreSQL server. Changing this forces a new resource to be created. | string | "pgadmin" | The admin login name cannot be azure_superuser, azure_pg_admin, admin, administrator, root, guest, or public. It cannot start with pg_. See: [Microsoft Quickstart Server Database](https://docs.microsoft.com/en-us/azure/postgresql/quickstart-create-server-database-portal) |
-| postgres_administrator_password | The password associated with the postgres_administrator_login for the PostgreSQL Server. | string | | The password must contain between 8 and 128 characters and must contain characters from three of the following categories: English uppercase letters, English lowercase letters, numbers (0 through 9), and non-alphanumeric characters (!, $, #, %, etc.). |
-| postgres_server_version | The version of the Azure Database for PostgreSQL server instance. Valid values are "9.5", "9.6", "10.0", and "11". Changing this forces a new resource to be created.| string | "11" | |
-| postgres_ssl_enforcement_enabled | Enforce SSL on connection to the Azure Database for PostgreSQL server instance | bool | true | |
-| postgres_db_names | List of names for databases to create for the Azure Database for PostgreSQL server instance. Each name needs to be a valid PostgreSQL identified. Changes this forces a new resource to be created. | list of strings | [] | |
-| postgres_db_charset | The Charset for the PostgreSQL Database. Must be a valid PostgreSQL Charset. Changing this forces a new resource to be created. | string | "UTF8" | |
-| postgres_db_collation | The Collation for the PostgreSQL Database. Needs to be a valid PostgreSQL Collation. Changing this forces a new resource to be created. |string| "English_United States.1252" | |
-| postgres_configurations | Configurations to enable on the PostgreSQL Database server instance. | map | {} | |
+| sku_name| The SKU Name for the PostgreSQL Server | string | "GP_Gen5_32" | The name pattern is the SKU, followed by the tier + family + cores (e.g. B_Gen4_1, GP_Gen5_4).|
+| storage_mb | Max storage allowed for the PostgreSQL server | number | 51200 | Possible values are between 5120 MB(5GB) and 1048576 MB(1TB) for the Basic SKU and between 5120 MB(5GB) and 4194304 MB(4TB) for General Purpose/Memory Optimized SKUs |
+| backup_retention_days | Backup retention days for the PostgreSQL server | number | 7 | Supported values are between 7 and 35 days. |
+| geo_redundant_backup_enabled | Enable Geo-redundant or not for server backup | bool | false | Not supported for the basic tier. |
+| administrator_login | The Administrator Login for the PostgreSQL Server. Changing this forces a new resource to be created. | string | "pgadmin" | The admin login name cannot be azure_superuser, azure_pg_admin, admin, administrator, root, guest, or public. It cannot start with pg_. See: [Microsoft Quickstart Server Database](https://docs.microsoft.com/en-us/azure/postgresql/quickstart-create-server-database-portal) |
+| administrator_password | The Password associated with the administrator_login for the PostgreSQL Server | string | "my$up3rS3cretPassw0rd" | The password must contain between 8 and 128 characters and must contain characters from three of the following categories: English uppercase letters, English lowercase letters, numbers (0 through 9), and non-alphanumeric characters (!, $, #, %, etc.). |
+| server_version | The version of the Azure Database for PostgreSQL server instance. Changing this forces a new resource to be created.| string | "11" | |
+| ssl_enforcement_enabled | Enforce SSL on connection to the Azure Database for PostgreSQL server instance | bool | true | |
+| postgresql_configurations | Configurations to enable on the PostgreSQL Database server instance | map(string) | {} | More details can be found [here](https://docs.microsoft.com/en-us/azure/postgresql/howto-configure-server-parameters-using-cli) |
+
+Here is a sample of the `postgres_servers` variable with the `default` entry only overriding the `administrator_password` parameter and the `cps` entry overriding all of the parameters:
+
+```terraform
+postgres_servers = {
+  default = {
+    administrator_password       = "D0ntL00kTh1sWay"
+  },
+  another_server = {
+    sku_name                     = "GP_Gen5_32"
+    storage_mb                   = 51200
+    backup_retention_days        = 7
+    geo_redundant_backup_enabled = false
+    administrator_login          = "pgadmin"
+    administrator_password       = "1tsAB3aut1fulDay"
+    server_version               = "11"
+    ssl_enforcement_enabled      = true
+    postgresql_configurations    = { foo = "true", bar = "false" }
+  }
+}
+```
diff --git a/examples/sample-input-byo.tfvars b/examples/sample-input-byo.tfvars
@@ -29,10 +29,12 @@ default_public_access_cidrs = [] # e.g., ["123.45.6.89/32"]
 # Tags for all taggable items in your cluster.
 tags = {} # e.g., { "key1" = "value1", "key2" = "value2" }
 
-# Azure Postgres config
-create_postgres                  = true # set this to "false" when using internal Crunchy Postgres
-postgres_ssl_enforcement_enabled = false
-postgres_administrator_password  = "mySup3rS3cretPassw0rd"
+# Postgres config - By having this entry a database server is created. If you do not
+#                   need an external database server remove the 'postgres_servers'
+#                   block below.
+postgres_servers = {
+  default = {},
+}
 
 # Azure Container Registry config
 create_container_registry           = false

diff --git a/examples/sample-input-ha.tfvars b/examples/sample-input-ha.tfvars
@@ -19,10 +19,12 @@ default_public_access_cidrs = [] # e.g., ["123.45.6.89/32"]
 # Tags can be specified matching your tagging strategy.
 tags = {} # for example: { "owner|email" = "<you>@<domain>.<com>", "key1" = "value1", "key2" = "value2" }
 
-# Azure Postgres config
-create_postgres                  = true # set this to "false" when using internal Crunchy Postgres
-postgres_ssl_enforcement_enabled = false
-postgres_administrator_password  = "mySup3rS3cretPassw0rd"
+# Postgres config - By having this entry a database server is created. If you do not
+#                   need an external database server remove the 'postgres_servers'
+#                   block below.
+postgres_servers = {
+  default = {},
+}
 
 # Azure Container Registry config
 create_container_registry           = false

diff --git a/examples/sample-input-minimal.tfvars b/examples/sample-input-minimal.tfvars
@@ -19,10 +19,12 @@ default_public_access_cidrs = [] # e.g., ["123.45.6.89/32"]
 # Tags can be specified matching your tagging strategy.
 tags = {} # for example: { "owner|email" = "<you>@<domain>.<com>", "key1" = "value1", "key2" = "value2" }
 
-# Azure Postgres config
-create_postgres                  = false # set this to "false" when using internal Crunchy Postgres
-postgres_ssl_enforcement_enabled = false
-postgres_administrator_password  = "mySup3rS3cretPassw0rd"
+# Postgres config - By having this entry a database server is created. If you do not
+#                   need an external database server remove the 'postgres_servers'
+#                   block below.
+# postgres_servers = {
+#   default = {},
+# }
 
 # Azure Container Registry config
 create_container_registry           = false

diff --git a/examples/sample-input-ppg.tfvars b/examples/sample-input-ppg.tfvars
@@ -19,10 +19,12 @@ default_public_access_cidrs = [] # e.g., ["123.45.6.89/32"]
 # Tags can be specified matching your tagging strategy.
 tags = {} # for example: { "owner|email" = "<you>@<domain>.<com>", "key1" = "value1", "key2" = "value2" }
 
-# Azure Postgres config
-create_postgres                  = true # set this to "false" when using internal Crunchy Postgres
-postgres_ssl_enforcement_enabled = false
-postgres_administrator_password  = "mySup3rS3cretPassw0rd"
+# Postgres config - By having this entry a database server is created. If you do not
+#                   need an external database server remove the 'postgres_servers'
+#                   block below.
+postgres_servers = {
+  default = {},
+}
 
 # Azure Container Registry config
 create_container_registry           = false

diff --git a/examples/sample-input.tfvars b/examples/sample-input.tfvars
@@ -21,10 +21,12 @@ default_public_access_cidrs = [] # e.g., ["123.45.6.89/32"]
 # Tags can be specified matching your tagging strategy.
 tags = {} # for example: { "owner|email" = "<you>@<domain>.<com>", "key1" = "value1", "key2" = "value2" }
 
-# Azure Postgres config
-create_postgres                  = true # set this to "false" when using internal Crunchy Postgres
-postgres_ssl_enforcement_enabled = false
-postgres_administrator_password  = "mySup3rS3cretPassw0rd"
+# Postgres config - By having this entry a database server is created. If you do not
+#                   need an external database server remove the 'postgres_servers'
+#                   block below.
+postgres_servers = {
+  default = {},
+}
 
 # Azure Container Registry config
 create_container_registry           = false

diff --git a/locals.tf b/locals.tf
@@ -1,21 +1,40 @@
 locals {
-  is_private = var.infra_mode == "private" ? true : false
-  is_standard = var.infra_mode == "standard" ? true : false
+
+  # Useful flags
+  is_private            = var.infra_mode == "private" ? true : false
+  is_standard           = var.infra_mode == "standard" ? true : false
+  create_jump_public_ip = var.create_jump_public_ip == null ? local.is_standard : var.create_jump_public_ip
+  create_nfs_public_ip  = var.create_nfs_public_ip == null ? local.is_standard : var.create_nfs_public_ip
 
+  # CIDR/Network
   default_public_access_cidrs          = local.is_private ? [] : (var.default_public_access_cidrs == null ? [] : var.default_public_access_cidrs)
   vm_public_access_cidrs               = local.is_private ? [] : (var.vm_public_access_cidrs == null ? local.default_public_access_cidrs : var.vm_public_access_cidrs)
   acr_public_access_cidrs              = local.is_private ? [] : (var.acr_public_access_cidrs == null ? local.default_public_access_cidrs : var.acr_public_access_cidrs)
   cluster_endpoint_public_access_cidrs = local.is_private ? [] : (var.cluster_endpoint_public_access_cidrs == null ? local.default_public_access_cidrs : var.cluster_endpoint_public_access_cidrs)
   postgres_public_access_cidrs         = local.is_private ? [] : (var.postgres_public_access_cidrs == null ? local.default_public_access_cidrs : var.postgres_public_access_cidrs)
+  subnets = { for k, v in var.subnets : k => v if ! ( k == "netapp" && var.storage_type == "standard")}
 
-  create_jump_public_ip = var.create_jump_public_ip == null ? local.is_standard : var.create_jump_public_ip
-  create_nfs_public_ip = var.create_nfs_public_ip == null ? local.is_standard : var.create_nfs_public_ip
+  # Kubernetes
+  kubeconfig_filename = "${var.prefix}-aks-kubeconfig.conf"
+  kubeconfig_path     = var.iac_tooling == "docker" ? "/workspace/${local.kubeconfig_filename}" : local.kubeconfig_filename
 
-  postgres_firewall_rules              = [for addr in local.postgres_public_access_cidrs : { "name" : replace(replace(addr, "/", "_"), ".", "_"), "start_ip" : cidrhost(addr, 0), "end_ip" : cidrhost(addr, abs(pow(2, 32 - split("/", addr)[1]) - 1)) }]
+  # PostgreSQL
+  postgres_servers        = var.postgres_servers == null ? {} : { for k, v in var.postgres_servers : k => merge( var.postgres_server_defaults, v, )}
+  postgres_firewall_rules = [for addr in local.postgres_public_access_cidrs : { "name" : replace(replace(addr, "/", "_"), ".", "_"), "start_ip" : cidrhost(addr, 0), "end_ip" : cidrhost(addr, abs(pow(2, 32 - split("/", addr)[1]) - 1)) }]
 
-  subnets = { for k, v in var.subnets : k => v if ! ( k == "netapp" && var.storage_type == "standard")}
+  postgres_outputs = length(module.postgresql) != 0 ? { for k,v in module.postgresql :
+    k => {
+      "server_name" : module.postgresql[k].server_name,
+      "fqdn" : module.postgresql[k].server_fqdn,
+      "admin" : "${module.postgresql[k].administrator_login}@${module.postgresql[k].server_name}",
+      "password" : module.postgresql[k].administrator_password,
+      "server_port" : "5432", # TODO - Create a var when supported
+      "ssl_enforcement_enabled" : local.postgres_servers[k].ssl_enforcement_enabled,
+      "internal" : false
+    }
+  } : {}
+
+  # Container Registry
   container_registry_sku = title(var.container_registry_sku)
 
-  kubeconfig_filename = "${var.prefix}-aks-kubeconfig.conf"
-  kubeconfig_path     = var.iac_tooling == "docker" ? "/workspace/${local.kubeconfig_filename}" : local.kubeconfig_filename
 }
diff --git a/main.tf b/main.tf
@@ -1,3 +1,8 @@
+## Azure-AKS
+#
+# Terraform Registry : https://registry.terraform.io/namespaces/Azure
+# GitHub Repository  : https://github.com/terraform-azurerm-modules
+#
 provider "azurerm" {
 
   subscription_id = var.subscription_id
@@ -291,25 +296,23 @@ module "postgresql" {
   source  = "Azure/postgresql/azurerm"
   version = "2.1.0"
 
-  count                        = var.create_postgres ? 1 : 0
+  for_each                     = local.postgres_servers != null ? length(local.postgres_servers) != 0 ? local.postgres_servers : {} : {}
+
   resource_group_name          = module.resource_group.name
   location                     = var.location
-  server_name                  = lower("${var.prefix}-pgsql")
-  sku_name                     = var.postgres_sku_name
-  storage_mb                   = var.postgres_storage_mb
-  backup_retention_days        = var.postgres_backup_retention_days
-  geo_redundant_backup_enabled = var.postgres_geo_redundant_backup_enabled
-  administrator_login          = var.postgres_administrator_login
-  administrator_password       = var.postgres_administrator_password
-  server_version               = var.postgres_server_version
-  ssl_enforcement_enabled      = var.postgres_ssl_enforcement_enabled
-  db_names                     = var.postgres_db_names
-  db_charset                   = var.postgres_db_charset
-  db_collation                 = var.postgres_db_collation
-  firewall_rule_prefix         = "${var.prefix}-postgres-firewall-"
+  server_name                  = lower("${var.prefix}-${each.key}-pgsql")
+  sku_name                     = each.value.sku_name
+  storage_mb                   = each.value.storage_mb
+  backup_retention_days        = each.value.backup_retention_days
+  geo_redundant_backup_enabled = each.value.geo_redundant_backup_enabled
+  administrator_login          = each.value.administrator_login
+  administrator_password       = each.value.administrator_password
+  server_version               = each.value.server_version
+  ssl_enforcement_enabled      = each.value.ssl_enforcement_enabled
+  firewall_rule_prefix         = "${var.prefix}-${each.key}-postgres-firewall-"
   firewall_rules               = local.postgres_firewall_rules
-  vnet_rule_name_prefix        = "${var.prefix}-postgresql-vnet-rule-"
-  postgresql_configurations    = var.postgres_configurations
+  vnet_rule_name_prefix        = "${var.prefix}-${each.key}-postgresql-vnet-rule-"
+  postgresql_configurations    = each.value.postgresql_configurations
   tags                         = module.resource_group.tags
 
   ## TODO : requires specific permissions

diff --git a/outputs.tf b/outputs.tf
@@ -22,28 +22,10 @@ output "aks_cluster_password" {
 }
 
 #postgres
-output "postgres_server_name" {
-  value = var.create_postgres ? element(coalescelist(module.postgresql.*.server_name, [" "]), 0) : null
-}
-output "postgres_fqdn" {
-  value = var.create_postgres ? element(coalescelist(module.postgresql.*.server_fqdn, [" "]), 0) : null
-}
-output "postgres_admin" {
-  value = var.create_postgres ? "${element(coalescelist(module.postgresql.*.administrator_login, [" "]), 0)}@${element(coalescelist(module.postgresql.*.server_name, [" "]), 0)}" : null
-}
-output "postgres_password" {
-  value = var.create_postgres ? element(coalescelist(module.postgresql.*.administrator_password, [" "]), 0) : null
-  sensitive = true
-}
-output "postgres_server_id" {
-  value = var.create_postgres ? element(coalescelist(module.postgresql.*.server_id, [" "]), 0) : null
-}
-output "postgres_server_port" {
-  value = var.create_postgres ? "5432" : null
-}
 
-output "postgres_ssl_enforcement_enabled" {
-  value = var.create_postgres ? var.postgres_ssl_enforcement_enabled : null
+output "postgres_servers" {
+  value = length(module.postgresql) != 0 ? local.postgres_outputs : null
+  sensitive = true
 }
 
 # jump server