VS2017 企业版安装好了后，找不到 SSIS. 原来在VS2017的安装包里没有 Integration Services。需要单独下载安装的，详见下面官方说明：
https://docs.microsoft.com/en-us/sql/ssdt/download-sql-server-data-tools-ssdt?view=sql-server-2017
Install Analysis Services, Integration Services, and Reporting Services tools
To install AS, IS, and RS project support, run the SSDT standalone installer.
不仅是Integration Services, Analysis Services, and Reporting Services tools也没有在VS2017安装包里的。
整理了离线版的SSDT安装包：