Connect an Azure Cosmos DB database to your application in Azure Spring Apps

1. Add one of the following dependencies to your application's pom.xml file. Choose the dependency that is appropriate for your API type.

   • API type: NoSQL

     <dependency>
         <groupId>com.azure.spring</groupId>
         <artifactId>spring-cloud-azure-starter-data-cosmos</artifactId>
     </dependency>
     

   • API type: MongoDB

     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-data-mongodb</artifactId>
     </dependency>
     

   • API type: Cassandra

     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-data-cassandra</artifactId>
     </dependency>
     

2. Update the current app by running az spring app deploy, or create a new deployment for this change by running az spring app deployment create.

Connect your app to the Azure Cosmos DB

The following Terraform script shows how to set up an app deployed to Azure Spring Apps with an Azure Cosmos DB account.

provider "azurerm" {
  features {}
}

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

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "China North 2"
}

resource "azurerm_cosmosdb_account" "cosmosdb" {
  name                = "cosmosacct-${var.application_name}-001"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  offer_type          = "Standard"
  kind                = "GlobalDocumentDB"

  consistency_policy {
    consistency_level = "Session"
  }

  geo_location {
    failover_priority = 0
    location          = azurerm_resource_group.example.location
  }
}

resource "azurerm_cosmosdb_sql_database" "cosmosdb" {
  name                = "cosmos-${var.application_name}-001"
  resource_group_name = azurerm_cosmosdb_account.cosmosdb.resource_group_name
  account_name        = azurerm_cosmosdb_account.cosmosdb.name
}

resource "azurerm_spring_cloud_service" "example" {
  name                = "${var.application_name}"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
}

resource "azurerm_spring_cloud_app" "example" {
  name                = "${var.application_name}-app"
  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
  quota {
    cpu    = "2"
    memory = "4Gi"
  }
  instance_count      = 1
  jvm_options         = "-XX:+PrintGC"
  runtime_version     = "Java_11"

  environment_variables = {
    "spring.cloud.azure.cosmos.endpoint" : azurerm_cosmosdb_account.cosmosdb.endpoint
    "spring.cloud.azure.cosmos.key" : azurerm_cosmosdb_account.cosmosdb.primary_key
    "spring.cloud.azure.cosmos.database" : azurerm_cosmosdb_sql_database.cosmosdb.name
  }
}

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
}