创建一个私有网路，在网络环境下创建数据库示例

通过此模板，您可以快速创建一个私有网络下的云数据库（RDS），数据库类型为MySQL 5.7。该模版首先会自动创建一个私有网络和子网，然后在此网络下创建按配置收费模式的MySQL5.7。

创建成功的资源栈，输出MySQL实例的ID和内网访域名。

注意：目前RDS不支持snapshot功能，即删除数据库的时候，不支持备份RDS数据。删除该资源类型时，请您确认好数据是否需要备份，如有需要，请手动导出数据后再去删除。

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编排模板说明:

模板包含几个主要部分。Format Version 部分是必需部分。模板中的某些部分可以任何顺序显示。但是，在您构建模板时，使用以下列表的逻辑顺序可能会很有用，因为一个部分中的值可能会引用上一个部分中的值。列表简要概述了每个部分。

Format Version（必选）:JDRO支持的模板版本号，当前版本号：2018-10-01

Description（可选）:一个描述模板的文本字符串，对模板进行详细描述。

Parameters（可选）:定义创建资源栈时，模板用户可以定制化的参数。在运行时 (创建或更新堆栈时) 传递到模板。您可在模板的 Resources 和 Outputs 部分中引用定义的这些参数。使用参数可以增强模板的灵活性，提高复用性。

Mappings（可选）:可用来指定条件参数值的密钥和关键值的映射，与查找表类似。您可通过使用 Resources 和 Outputs 部分中的 Fn::FindInMap 内部函数将键与相应的值匹配。

Conditions（可选）:Conditions 使用 Fn::And、Fn::Or、Fn::Not、Fn::Equals 等定义条件。在创建或更新资源栈时，系统先计算模板中的所有条件，然后再创建资源。创建与 true 条件关联的所有资源，忽略与 false 条件关联的所有资源。

Resources（可选）:用于详细定义使用该模板创建的资源栈所包含的资源，包括资源间的依赖关系、配置细节等。

Outputs（可选）:用于输出一些资源属性等有用信息。可以通过 API 或控制台获取输出的内容。

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示例模板：

  
{
  "JDCLOUDTemplateFormatVersion": "2018-10-01",
  "Description": "JDRO RDS_INSTANCE TEMPLATE",
  "Parameters": {
    "VPCName": {
      "Default": "vpc",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the VPC Name. It cannot be same as an existing VPC name, otherwise the resource will fail to be created",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen ."
    },
    "SubnetName": {
      "Default": "subnet",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the Subnet Name. It cannot be same as an existing Subnet name, otherwise the resource will fail to be created",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen ."
    },
    "AddressPrefix": {
      "Default": "10.0.0.0/16",
      "Type": "String",
      "Description": "Give an CIDR",
      "AllowedValues": [
        "192.168.0.0/16",
        "172.16.0.0/16",
        "10.0.0.0/16"
      ],
      "ConstraintDescription": "Need give an exact CIDR."
    },
    "DBName": {
      "Default": "mydb",
      "Description": "MySQL database name",
      "Type": "String",
      "MinLength": "2",
      "MaxLength": "32",
      "AllowedPattern": "^[a-z][a-z0-9]*$",
      "ConstraintDescription": "The name only supports figures letters both in upper case and lower case and English underline, no less than 2 characters and no more than 32 characters."
    },
    "DBUser": {
      "Default": "user",
      "Description": "Username for MySQL database access",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "16",
      "AllowedPattern": "^[a-zA-Z][a-zA-Z0-9]*$",
      "ConstraintDescription": "must begin with a letter and contain only alphanumeric characters."
    },
    "DBPassword": {
      "NoEcho": true,
      "Description": "Password for dbuser or DB access",
      "Type": "String",
      "MinLength": "8",
      "MaxLength": "16",
      "AllowedPattern": "[a-zA-Z0-9]*"
    }
  },
  "Mappings": {
    "AZInfo": {
      "cn-north-1": {
        "az1": "cn-north-1a",
        "az2": "cn-north-1b"
      },
      "cn-east-1": {
        "az1": "cn-east-1a"
      },
      "cn-east-2": {
        "az1": "cn-east-2a",
        "az2": "cn-east-2b"
      },
      "cn-south-1": {
        "az1": "cn-south-1a"
      }
    },
    "ImageInfo": {
      "cn-north-1": {
        "image": "img-2qz094wxaz"
      },
      "cn-east-1": {
        "image": "img-nfrxl97pal"
      },
      "cn-east-2": {
        "image": "img-wcewkxc5c1"
      },
      "cn-south-1": {
        "image": "img-xkjedl0lgm"
      }
    }
  },
  "Resources": {
    "MyVPC": {
      "Type": "JDCLOUD::VPC::VPC",
      "Properties": {
        "VpcName": {
          "Ref": "VPCName"
        }
      }
    },
    "MySubnet": {
      "Type": "JDCLOUD::VPC::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MyVPC"
        },
        "AddressPrefix": {
          "Ref": "AddressPrefix"
        },
        "SubnetName": {
          "Ref": "SubnetName"
        }
      }
    },
    "MyDBInstance": {
      "Type": "JDCLOUD::RDS::DBInstance",
      "Properties": {
        "Engine": "MySQL",
        "AZId": [
          {
            "Fn::FindInMap": [
              "AZInfo",
              {
                "Ref": "JDCLOUD::Region"
              },
              "az1"
            ]
          }
        ],
        "ChargeSpec": {
          "ChargeMode": "postpaid_by_duration"
        },
        "EngineVersion": "5.7",
        "InstanceClass": "db.mysql.s1.micro",
        "InstanceName": {
          "Ref": "DBName"
        },
        "InstanceStorageGB": 20,
        "VpcId": {
          "Ref": "MyVPC"
        },
        "SubnetId": {
          "Ref": "MySubnet"
        },
        "Database": {
          "CharacterSetName": "utf8",
          "DBName": {
            "Ref": "DBName"
          }
        },
        "Account": {
          "AccountName": {
            "Ref": "DBUser"
          },
          "AccountPassword": {
            "Ref": "DBPassword"
          }
        }
      }
    }
  },
  "Outputs": {
    "MySQL_ID": {
      "Value": {
        "Ref": "MyDBInstance"
      }
    },
    "MySQL_Domain": {
      "Value": {
        "Fn::GetAtt": [
          "MyDBInstance",
          "InternalDomainName"
        ]
      }
    }
  }
}