Solicit feedback on the problems of DNS for Cloud Resources described by the draft-ietf-rtgwg-net2cloud-problem-statement

Linda Dunbar <linda.dunbar@futurewei.com> Tue, 11 February 2020 22:21 UTC

Return-Path: <linda.dunbar@futurewei.com>
X-Original-To: rtgwg@ietfa.amsl.com
Delivered-To: rtgwg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 03BAF120024; Tue, 11 Feb 2020 14:21:12 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.001
X-Spam-Level:
X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=futurewei.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KXgJuS5KHN-E; Tue, 11 Feb 2020 14:21:09 -0800 (PST)
Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2111.outbound.protection.outlook.com [40.107.223.111]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1C8D0120018; Tue, 11 Feb 2020 14:21:08 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nH3FdPz67ys5kjAc6B0nYhLADMoTHQGiBoTVvSdF7FHSFfo9ZY18mSFYMSz3ixwHwL/YdgSdUdxSZUe8Jqxdn2oLUj8N//K3CfhKIP8pBhDEg+4sYdaHOb0mIpy7L820Jhj6Oo8U3gMwGeI3tqsQgrQTJTsZgaqJBCvtLUUK3xuM1f9zG8ZcJ8+MCFPrd5BWm7a6CD9xavNSymZKWkFb9HuIGvsoCSRfUeIuK/4G9Wxite3HSTmJjiziTrZxfBLjEZ4s7/L5bBKectjTSj+aVIhSTNKCQKgFN3yC5BiR/gyHjJfrhgTANI0ObWZxAQdjwyCz78DmwWKQXZNhykH74w==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=B2yL+HzOsFkGIY5kXqwS/cisWSIUMLID+0rX6I8HkeQ=; b=gTYbazGm6S6d+mX7G9jnp2d51Z0A4yzuMBWYNhnBBzZVZiMjDJAJfPJ5CWUuhCGsS9FhaNO5Mc70KfYrhc6+BCL5C9KPrDPgcOC8WxTB+GK+IsnxRw0YboxwJzJE4A29kksye2p2epvkAODe5qdMmWJi5m0MSeGIuZhQOd4fGLWvARJn8WYS3SZ09+xp4vrbd5zp+5O8mKrX81mfvGtQjJEBKUtnE0+F47WOwq+l3M8Rhovt/EOVAQRHn0MdKqAABJfVVgEy1kdh9DkiZRJcQltphTfv+jXXOYqcma8eFMJbTQd5/j9OufGRp6NvJsuwZgJwN3SgueD+kNy9RitKwA==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=futurewei.com; dmarc=pass action=none header.from=futurewei.com; dkim=pass header.d=futurewei.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Futurewei.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=B2yL+HzOsFkGIY5kXqwS/cisWSIUMLID+0rX6I8HkeQ=; b=AvPvKV4gwgEI3Z1ZmsrMYLQOI+6r7keJu4at71HjdmD01KbOyvj73pmIxgYJ3Rp2TrSnCASX8U23i97z4Tz4ygGKFQ7E8f3+ggXj1beyyyygZzAtdBidkA5F7POeqkpGjvPVin/nRU4r0PDrGZOUzCJft+BEitw/6Hw80m6Ijq8=
Received: from BN6PR1301MB2083.namprd13.prod.outlook.com (10.174.89.151) by BN6PR1301MB1908.namprd13.prod.outlook.com (10.174.89.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.20; Tue, 11 Feb 2020 22:21:05 +0000
Received: from BN6PR1301MB2083.namprd13.prod.outlook.com ([fe80::3102:fae9:7c48:cbe]) by BN6PR1301MB2083.namprd13.prod.outlook.com ([fe80::3102:fae9:7c48:cbe%4]) with mapi id 15.20.2729.021; Tue, 11 Feb 2020 22:21:05 +0000
From: Linda Dunbar <linda.dunbar@futurewei.com>
To: "dnsop@ietf.org" <dnsop@ietf.org>, RTGWG <rtgwg@ietf.org>
CC: Paul Ebersman <ebersman-ietf@dragon.net>
Subject: Solicit feedback on the problems of DNS for Cloud Resources described by the draft-ietf-rtgwg-net2cloud-problem-statement
Thread-Topic: Solicit feedback on the problems of DNS for Cloud Resources described by the draft-ietf-rtgwg-net2cloud-problem-statement
Thread-Index: AdXhDgZ3FNT4wyuhTVyPeuEWPmJf/gAGVoPA
Date: Tue, 11 Feb 2020 22:21:05 +0000
Message-ID: <BN6PR1301MB20839C511BDF230D79658BF485180@BN6PR1301MB2083.namprd13.prod.outlook.com>
References: <BN6PR1301MB2083B6F88FDE9A0A4EA2384985180@BN6PR1301MB2083.namprd13.prod.outlook.com>
In-Reply-To: <BN6PR1301MB2083B6F88FDE9A0A4EA2384985180@BN6PR1301MB2083.namprd13.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: spf=none (sender IP is ) smtp.mailfrom=linda.dunbar@futurewei.com;
x-originating-ip: [199.187.220.18]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 1f8b25eb-e9c0-4f8e-fa95-08d7af40af72
x-ms-traffictypediagnostic: BN6PR1301MB1908:
x-microsoft-antispam-prvs: <BN6PR1301MB190867E49E228DBE88DD9B3085180@BN6PR1301MB1908.namprd13.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:10000;
x-forefront-prvs: 0310C78181
x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(376002)(346002)(39850400004)(396003)(136003)(366004)(189003)(199004)(76116006)(6506007)(66476007)(64756008)(478600001)(2940100002)(66556008)(66446008)(33656002)(66946007)(55016002)(52536014)(4326008)(186003)(110136005)(9686003)(26005)(71200400001)(966005)(7696005)(316002)(44832011)(2906002)(81166006)(81156014)(5660300002)(86362001)(8936002)(8676002); DIR:OUT; SFP:1102; SCL:1; SRVR:BN6PR1301MB1908; H:BN6PR1301MB2083.namprd13.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1;
received-spf: None (protection.outlook.com: futurewei.com does not designate permitted sender hosts)
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-ms-exchange-antispam-messagedata: U2/rTcqys34XpXjT8mVaysr6hzZGwH8Fn8NmFnlXw/35p9H80qgu1aleUiJxw8C7M2EWQtGAOrGDDhDBfJpiX8lr42beqo9QwEWM750G6CJzMSYWueM9SYwZWv0cJ9XQn/cPTGKl+D+8MwMSQh0YaA==
x-ms-exchange-transport-forked: True
Content-Type: multipart/alternative; boundary="_000_BN6PR1301MB20839C511BDF230D79658BF485180BN6PR1301MB2083_"
MIME-Version: 1.0
X-OriginatorOrg: Futurewei.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 1f8b25eb-e9c0-4f8e-fa95-08d7af40af72
X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Feb 2020 22:21:05.0781 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 0fee8ff2-a3b2-4018-9c75-3a1d5591fedc
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: 9+VkavezvVzDx9yDcUhwz2ANwr8gYnXNWEkrFuehV0At82T63KCitOgK3zircXLciSkCajNI4aVI7ZN63DF2dA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR1301MB1908
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtgwg/MKpENNzVHFW_dfwp4sPZRXq1wik>
X-BeenThere: rtgwg@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Routing Area Working Group <rtgwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtgwg>, <mailto:rtgwg-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/rtgwg/>
List-Post: <mailto:rtgwg@ietf.org>
List-Help: <mailto:rtgwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtgwg>, <mailto:rtgwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 11 Feb 2020 22:21:12 -0000

Many thanks to Paul Ebersman and Suzanne Woolf discussion during NANOG about the deep intricate issues around DNS and learned that DNSOP is the right group to solicit feedback about DNS issues for utilizing hybrid Clouds.

https://datatracker.ietf.org/doc/draft-ietf-rtgwg-net2cloud-problem-statement/ describes the problems that enterprises face today when interconnecting their branch offices with dynamic workloads in third party data centers (a.k.a. Cloud DCs).
There can be many problems associated with network connecting to or among Clouds, many of which probably are out of the IETF scope. The objective of this document is to identify some of the problems that need additional work in IETF Routing area. Other problems are out of the scope of this document.

During IETF 106, we received comments that the document should cover the problems associated with DNS service by different Cloud Operators for Enterprise to utilize Cloud Resources even though DNS is not within the scope of IETF routing area.  We greatly appreciate DNS experts to provide comments to our description.


3.4    DNS for Cloud Resources
DNS name resolution is essential for on-premises and cloud-based resources. For customers with hybrid workloads, which include on-premises and cloud-based resources, extra steps are necessary to configure DNS to work seamlessly across both environments.
Cloud operators have their own DNS to resolve resources within their Cloud DCs and to well-known public domains. Cloud's DNS can be configured to forward queries to customer managed authoritative DNS servers hosted on-premises, and to respond to DNS queries forwarded by on-premises DNS servers.
For enterprises utilizing Cloud services by different cloud operators, it is necessary to establish policies and rules on how/where to forward DNS queries to. When applications in one Cloud need to communication with applications hosted in another Cloud, there could be DNS queries from one Cloud DC being forwarded to the enterprise's on premise DNS, which in turn be forwarded to the DNS service in another Cloud. Needless to say, configuration can be complex depending on the application communication patterns.


Thank you very much.

Linda Dunbar