Bind an Azure Database for MySQL instance to your application in Azure Spring Cloud

1. Note the admin username and password of your Azure Database for MySQL account.

2. Connect to the server, create a database named testdb from a MySQL client, and then create a new non-admin account.

3. In the Azure portal, on your Azure Spring Cloud service page, look for the Application Dashboard, and then select the application to bind to your Azure Database for MySQL instance. This is the same application that you updated or deployed in the previous step.

4. Select Service binding, and then select the Create service binding button.

5. Fill out the form, selecting Azure MySQL as the Binding type, using the same database name you used earlier, and using the same username and password you noted in the first step.

6. Restart the app, and this binding should now work.

7. To ensure that the service binding is correct, select the binding name, and then verify its detail. The property field should look like this:

   spring.datasource.url=jdbc:mysql://some-server.mysql.database.azure.com:3306/testdb?useSSL=true&requireSSL=false&useLegacyDatetimeCode=false&serverTimezone=UTC
   spring.datasource.username=admin@some-server
   spring.datasource.password=abc******
   spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
   

The following Terraform script shows how to set up an Azure Spring Cloud app with Azure Database for MySQL.

provider "azurerm" {
  features {}
}

variable "application_name" {
  type        = string
  description = "The name of your application"
  default     = "demo-abc"
}

variable "administrator_login" {
  type        = string
  description = "The MySQL administrator login"
  default     = "myadmin"
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "random_password" "password" {
  length           = 32
  special          = true
  override_special = "_%@"
}

resource "azurerm_mysql_server" "database" {
  name                = "mysql-${var.application_name}-001"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location

  administrator_login          = var.administrator_login
  administrator_login_password = random_password.password.result

  sku_name                          = "B_Gen5_1"
  storage_mb                        = 5120
  version                           = "5.7"
  auto_grow_enabled                 = true
  backup_retention_days             = 7
  geo_redundant_backup_enabled      = false
  infrastructure_encryption_enabled = false
  public_network_access_enabled     = true
  ssl_enforcement_enabled           = true
  ssl_minimal_tls_version_enforced  = "TLS1_2"
}

resource "azurerm_mysql_database" "database" {
  name                = "mysqldb-${var.application_name}-001"
  resource_group_name = azurerm_resource_group.example.name
  server_name         = azurerm_mysql_server.database.name
  charset             = "utf8"
  collation           = "utf8_unicode_ci"
}

# This rule is to enable the 'Allow access to Azure services' checkbox
resource "azurerm_mysql_firewall_rule" "database" {
  name                = "mysqlfw-${var.application_name}-001"
  resource_group_name = azurerm_resource_group.example.name
  server_name         = azurerm_mysql_server.database.name
  start_ip_address    = "0.0.0.0"
  end_ip_address      = "0.0.0.0"
}

resource "azurerm_spring_cloud_service" "example" {
  name                = "example-springcloud"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
}

resource "azurerm_spring_cloud_app" "example" {
  name                = "example-springcloudapp"
  resource_group_name = azurerm_resource_group.example.name
  service_name        = azurerm_spring_cloud_service.example.name
  is_public           = true
  https_only          = true
}

resource "azurerm_spring_cloud_java_deployment" "example" {
  name                = "default"
  spring_cloud_app_id = azurerm_spring_cloud_app.example.id
  cpu                 = 2
  memory_in_gb        = 4
  instance_count      = 2
  jvm_options         = "-XX:+PrintGC"
  runtime_version     = "Java_11"

  environment_variables = {
    "spring.datasource.url" : "jdbc:mysql://${azurerm_mysql_server.database.fqdn}:3306/${azurerm_mysql_database.database.name}?useSSL=true&requireSSL=false&useLegacyDatetimeCode=false&serverTimezone=UTC"
    "spring.datasource.username" : "${var.administrator_login}@${azurerm_mysql_server.database.name}"
    "spring.datasource.password" : random_password.password.result
    "spring.jpa.properties.hibernate.dialect" : "org.hibernate.dialect.MySQL5InnoDBDialect"
  }
}

resource "azurerm_spring_cloud_active_deployment" "example" {
  spring_cloud_app_id = azurerm_spring_cloud_app.example.id
  deployment_name     = azurerm_spring_cloud_java_deployment.example.name
}