Cosmos 中的 Cassandra 表不支持静态属性 - 使用 ARM 模板或 terraform

Question

在 Cosmos Cassandra 中创建具有静态属性和数据类型的表失败！部署键空间后使用 CQL 创建表可以很好地处理静态字段。还有其他人面临相同或类似的问题吗？ 这是一个 github 问题：https://github.com/Azure/azure-rest-api-specs/issues/26506

我尝试使用以下脚本运行

terraform apply

resource "azurerm_resource_group" "example" {
  name     = "tflex-cosmosdb-account-rg"
  location = "West Europe"
}

resource "azurerm_cosmosdb_account" "example" {
  name                = "tfex-cosmosdb-account"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  offer_type          = "Standard"

  capabilities {
    name = "EnableCassandra"
  }

  consistency_policy {
    consistency_level = "Strong"
  }

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

resource "azurerm_cosmosdb_cassandra_keyspace" "example" {
  name                = "tfex-cosmos-cassandra-keyspace"
  resource_group_name = azurerm_cosmosdb_account.example.resource_group_name
  account_name        = azurerm_cosmosdb_account.example.name
  throughput          = 400
}

resource "azurerm_cosmosdb_cassandra_table" "example" {
  name                  = "testtable"
  cassandra_keyspace_id = azurerm_cosmosdb_cassandra_keyspace.example.id

  schema {

    column {
      name = "id"
      type = "uuid"
    }
    column {
      name = "type"
      type = "text"
    }
    column {
      name = "source"
      type = "text"
    }
    column {
      name = "time"
      type = "timestamp"
    }
    column {
      name = "entity"
      type = "text"
    }
    column {
      name = "ownerid"
      type = "uuid"
    }
    column {
      name = "ownertype"
      type = "text"
    }
    column {
      name = "data"
      type = "blob"
    }
    column {
      name = "sequence"
      type = "int"
    }
    column {
      name = "cloudeventview"
      type = "blob static"
    }
    
    column {
      name = "lastupdated"
      type = "timestamp static"
    }
    partition_key {
      name = "ownertype"
    }
    partition_key {
      name = "ownerid"
    }
    cluster_key {
      name     = "sequence"
      order_by = "Desc"
    }
  }
}

表已创建，但没有静态字段。根据 Azure 的文档 数据类型声明支持静态。

Answer 1

我尝试使用 Terraform 在 Cosmos 的 Cassandra 表中配置静态属性类型，并且我能够成功地配置需求。

在 Cassandra 中，静态列由同一分区的所有行共享。

查看您的 Terraform 脚本，您已将

cloudeventview

 和 

lastupdated

 列定义为静态。但是，问题可能出在用于定义静态列的语法中。在 CQL 中定义静态列的标准语法是 

column_name type static

，但此语法可能无法直接在 Terraform 中转换。

确保您使用的 Terraform 提供程序支持定义静态列的语法。语法可能不同或者提供程序的当前版本有限制

我的地形配置：

main.tf：

provider "azurerm" {
    features {} # Here I provided the latest version to eliminate all the compatibility issues
}

# Resource Group
resource "azurerm_resource_group" "example" {
  name     = "tflex-cosmosdb-vkaccount-rg"
  location = "east us"
}

# Cosmos DB Account
resource "azurerm_cosmosdb_account" "example" {
  name                = "tfex-cosmosdb-account"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  offer_type          = "Standard"

  capabilities {
    name = "EnableCassandra"
  }

  consistency_policy {
    consistency_level = "Strong"
  }

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

# Cassandra Keyspace
resource "azurerm_cosmosdb_cassandra_keyspace" "example" {
  name                = "tfex-cosmos-cassandra-keyspace"
  resource_group_name = azurerm_cosmosdb_account.example.resource_group_name
  account_name        = azurerm_cosmosdb_account.example.name
  throughput          = 400
}

# Cosmos DB Cassandra Table without static fields
resource "azurerm_cosmosdb_cassandra_table" "example" {
  name                  = "testtable"
  cassandra_keyspace_id = azurerm_cosmosdb_cassandra_keyspace.example.id
  # Define schema without static fields
    schema {

    column {
      name = "id"
      type = "uuid"
    }
    column {
      name = "type"
      type = "text"
    }
    column {
      name = "source"
      type = "text"
    }
    column {
      name = "time"
      type = "timestamp"
    }
    column {
      name = "entity"
      type = "text"
    }
    column {
      name = "ownerid"
      type = "uuid"
    }
    column {
      name = "ownertype"
      type = "text"
    }
    column {
      name = "data"
      type = "blob"
    }
    column {
      name = "sequence"
      type = "int"
    }
    column {
      name = "cloudeventview"
      type = "blob static"
    }
    
    column {
      name = "lastupdated"
      type = "timestamp static"
    }
    partition_key {
      name = "ownertype"
    }
    partition_key {
      name = "ownerid"
    }
    cluster_key {
      name     = "sequence"
      order_by = "Desc"
    }
  }
}

输出：

参考：

Azure Cosmos DB for Apache Cassandra 支持的 Apache Cassandra 功能 |微软学习