From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id DBF1B776BD for ; Wed, 28 Apr 2021 08:49:57 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id CA4C12706E for ; Wed, 28 Apr 2021 08:49:27 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id 6018427047 for ; Wed, 28 Apr 2021 08:49:23 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 26D4242959; Wed, 28 Apr 2021 08:40:52 +0200 (CEST) Message-ID: <5f38f579-fe59-763e-6919-be691912aa87@proxmox.com> Date: Wed, 28 Apr 2021 08:40:51 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Thunderbird/89.0 Content-Language: en-US To: Proxmox VE user list , alexandre derumier , JR Richardson References: <807b442a-7b57-2918-986d-fda0db321b45@odiso.com> From: Thomas Lamprecht In-Reply-To: <807b442a-7b57-2918-986d-fda0db321b45@odiso.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.006 Adjusted score from AWL reputation of From: address KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment NICE_REPLY_A -0.001 Looks like a legit reply (A) SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [PVE-User] Multi Data Center Cluster or Not X-BeenThere: pve-user@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE user list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Apr 2021 06:49:57 -0000 On 28.04.21 04:03, alexandre derumier wrote: > On 27/04/2021 20:38, JR Richardson wrote: >> I'm looking for suggestions for geo-diversity using PROXMOX >> Clustering. I understand running hypervisors in the same cluster in >> multiple data centers is possible with high capacity/low latency >> inter-site links. What I'm learning is there could be better ways, >> like running PROXMOX backup servers (PBS) with Remote Sync. Using PBS >> is interesting but would require manually restoring nodes should a >> failure occur. >> >> I'm looking for best practice or suggestions in topology that folks >> are using successfully or even tales of failure for what to avoid. > > If you want same cluster on multiple datacenter, you really need low latency (for proxmox && storage), and at least 3 datacenters to keep quorum. > > if you need a 2dc datacenter, with 1 primary && 1 backup as disaster recovery > > you could manually replicate a zfs or ceph storage to the backup dc (with snapshot export/import), or other storage replication feature if you have a san like netapp for example and do an rsync of /etc/pve. > We know of setups which use rbd-mirror to mirror their production Ceph pool to a second DC for recovery on failure. It's still needs a bit of hands-on approach on setup and actual recovery can be prepared too (pre-create matching VMs, maybe lock them by default so no start is done by accident). We also know some city-gov IT people which run their cluster over multiple DCs, but they have the luck to be able to run redundant fiber with LAN-like latency between those DCs, which may not be an option for everyone. A multi-datacenter management is planned, but we currently are still fleshing out the basis, albeit some features required for that to happen are in-work. Nothing ready to soon, though, just mentioning as FYI. cheers, Thomas