[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-08。"],[[["\u003cp\u003ePrivate connectivity configurations in Database Migration Service establish a peering connection between the service network and your Virtual Private Cloud (VPC) network, enabling private access to your source database's private IP.\u003c/p\u003e\n"],["\u003cp\u003eCreating a private connectivity configuration requires a VPC network without peering restrictions, and this network must contain the source database's private IP and an available IP range with a minimum CIDR block of \u003ccode\u003e/29\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eTo create a private connectivity configuration, users need specific IAM roles, including Database Migration Admin and Compute Network Viewer, while the Database Migration Service account requires Compute Network Admin.\u003c/p\u003e\n"],["\u003cp\u003eThe private connectivity configuration must be created in the same region as the project's Virtual Private Cloud network, as well as where you plan to create migration jobs and connection profiles, since Database Migration Service is a fully regional product.\u003c/p\u003e\n"],["\u003cp\u003eWhen creating the configuration, you must specify an IP range with a minimum CIDR block of \u003ccode\u003e/29\u003c/code\u003e which Database Migration Service will use to create a subnet within your VPC for communication with the source database.\u003c/p\u003e\n"]]],[],null,["# Create a private connectivity configuration for the source database\n\nThis page describes how to create a private connectivity configuration.\nPrivate connectivity configuration is Database Migration Service construct that helps\nyou create a peering connection between Database Migration Service service network\nand your project's Virtual Private Cloud (VPC) network. You create private connectivity\nconfigurations to establish private connections to source Oracle\ndatabases.\n\nFor more information about network connectivity in Database Migration Service, see\n[Network connectivity for heterogeneous Oracle migrations](/database-migration/docs/oracle-to-alloydb/networking-overview)\nand\n[Source networking methods overview](/database-migration/docs/oracle-to-alloydb/networking-methods-source).\n\nBefore you begin\n----------------\n\n1. Ensure you have a Virtual Private Cloud network that meets the following requirements:\n - The VPC network doesn't have any [peering restrictions](/vpc/docs/vpc-peering#restrictions).\n - It's the same network where your source database is peered. For more information, see the requirements section in [Private connectivity with VPC peering](/database-migration/docs/oracle-to-alloydb/networking-methods-source#private-connectivity-for-source).\n - The VPC network has an available IP range with a minimum CIDR block of `/29`. Database Migration Service uses this IP range to create a subnet so that it can communicate with the source database.\n2. Enable the Database Migration Service and Compute Engine APIs. [Enable the APIs](https://console.cloud.google.com/flows/enableapi?apiid=compute.googleapis.com,datamigration.googleapis.com)\n\n### Required roles\n\nTo get the permissions that you need to create a private connectivity\nconfiguration, ask your administrator to grant you the\nrequired IAM roles on your project:\n\n- [Database Migration Admin](/iam/docs/roles-permissions/datamigration#datamigration.admin) (`roles/datamigration.admin`)\n- [Compute Network Viewer](/iam/docs/roles-permissions/compute#compute.networkViewer) (`roles/compute.networkViewer`)\n\nFor more information about granting roles, see\n[Manage access](/iam/docs/granting-changing-revoking-access) in the Identity and Access Management documentation.\n\nThese predefined roles contain the permissions required to create a\nprivate connectivity configuration in Database Migration Service. To see the exact\npermissions that are required, expand the\n**Required permissions** section: \n\n#### Required permissions\n\nThe following permissions are required to perform heterogeneous Oracle\nmigrations with Database Migration Service:\n\n- `datamigration.* `\n- `compute.networks.list`\n\nYou might also be able to get these permissions with\n[custom roles](/iam/docs/creating-custom-roles) or other\n[predefined roles](/iam/docs/roles-permissions).\n\nCreate the configuration\n------------------------\n\nTo create a private connectivity configuration, follow these steps:\n\n1. In the Google Cloud console, go to the **Private connectivity configurations** page.\n\n [Go to Private connectivity configurations](https://console.cloud.google.com/dbmigration/private-connections)\n2. Click **Create configuration**.\n3. In the **Configure private connectivity** section, enter the display\n name for the configuration and select the region.\n\n Make sure you use the same region where your project Virtual Private Cloud\n network resides. It must be the same region where you intend to create\n the migration job and connection profiles. Database Migration Service is a\n fully-regional product, meaning all entities\n related to your migration (source and destination connection profiles,\n migration jobs, destination databases, conversion workspaces) must be saved in a\n single region.\n4. From the **Authorized VPC network** drop-down menu, select the VPC that you want Database Migration Service to have private connectivity access. This VPC needs to be the network where your source Oracle has a private IP assigned.\n5. In the **Allocate an IP range** field, enter an IP range with a\n minimum CIDR block of `/29`. For example:\n `10.72.149.40/29`.\n\n Database Migration Service creates a subnet based on that IP range in your\n selected VPC. We recommend that you consult your network administrator\n to acquire a suitable IP range.\n\n For testing purposes, you can also try to generate an IP range with\n Virtual Private Cloud private services access interface. Note that this automatic\n allocation isn't intended for Database Migration Service private connectivity\n configurations. You need to release the automatically allocated range\n before you use it in Database Migration Service. Expand the following section\n for more information. \n\n #### Example: generate an IP range with private services access\n\n You can generate an unoccupied IP range in your VPC network\n when you create a private services access setup. You can later\n release this range in the VPC configuration and use it for the\n Database Migration Service private connectivity configuration.\n\n To generate an unoccupied IP range, follow these steps:\n 1. In the Google Cloud console, go to the **VPC networks** page.\n\n [Go to VPC networks](https://console.cloud.google.com/networking/networks/list)\n 2. From the list of networks in your project, select the one where your source Oracle database has a private IP assigned.\n 3. Go to the **Private services access** tab and click **Allocate IP range**.\n 4. In the **Allocate an internal IP range** window, enter the following:\n 1. A display name in the **Name** field.\n 2. Select the **Automatic** option and enter `29` for the prefix\n 3. length.\n\n **Result**: Your VPC network allocates an empty IP range for\n private services access in your project.\n 5. Check the **Internal IP range** value of the new allocated range. Note it down for later use in Database Migration Service.\n 6. Select your new IP range from the list, and click **Release**.\n 7. The generated IP range is now free for use in another subnet. Enter the range you noted down in the **Allocate an IP range** field when you create the private connectivity configuration in Database Migration Service.\n6. Click **Create**.\n\nThe private connectivity configuration is now ready for use with a\n[source connection profile](/database-migration/docs/oracle-to-alloydb/create-source-connection-profile).\n\nWhat's next\n-----------\n\n- Learn about destination database connectivity. See\n [Destination database connectivity overview](/database-migration/docs/oracle-to-alloydb/networking-methods-destination).\n\n- To get a complete, step-by-step migration walkthrough, see\n [Oracle to AlloyDB for PostgreSQL migration guide](/database-migration/docs/oracle-to-alloydb/guide)."]]
