From owner-freebsd-fs@freebsd.org Fri Jan 24 15:34:00 2020 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id CEDA51F395E for ; Fri, 24 Jan 2020 15:34:00 +0000 (UTC) (envelope-from mike@sentex.net) Received: from pyroxene2a.sentex.ca (pyroxene19.sentex.ca [IPv6:2607:f3e0:0:3::19]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "pyroxene.sentex.ca", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48438R591yz4BJs for ; Fri, 24 Jan 2020 15:33:59 +0000 (UTC) (envelope-from mike@sentex.net) Received: from [IPv6:2607:f3e0:0:4:dcf3:ccb3:44b0:7f90] ([IPv6:2607:f3e0:0:4:dcf3:ccb3:44b0:7f90]) by pyroxene2a.sentex.ca (8.15.2/8.15.2) with ESMTPS id 00OFXwWU011806 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO) for ; Fri, 24 Jan 2020 10:33:59 -0500 (EST) (envelope-from mike@sentex.net) To: freebsd-fs From: mike tancsa Subject: export a zfs snapshot over nfs Autocrypt: addr=mike@sentex.net; keydata= mQENBFywzOMBCACoNFpwi5MeyEREiCeHtbm6pZJI/HnO+wXdCAWtZkS49weOoVyUj5BEXRZP xflV2ib2hflX4nXqhenaNiia4iaZ9ft3I1ebd7GEbGnsWCvAnob5MvDZyStDAuRxPJK1ya/s +6rOvr+eQiXYNVvfBhrCfrtR/esSkitBGxhUkBjOti8QwzD71JVF5YaOjBAs7jZUKyLGj0kW yDg4jUndudWU7G2yc9GwpHJ9aRSUN8e/mWdIogK0v+QBHfv/dsI6zVB7YuxCC9Fx8WPwfhDH VZC4kdYCQWKXrm7yb4TiVdBh5kgvlO9q3js1yYdfR1x8mjK2bH2RSv4bV3zkNmsDCIxjABEB AAG0HW1pa2UgdGFuY3NhIDxtaWtlQHNlbnRleC5uZXQ+iQFUBBMBCAA+FiEEmuvCXT0aY6hs 4SbWeVOEFl5WrMgFAlywzOYCGwMFCQHhM4AFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AACgkQ eVOEFl5WrMhnPAf7Bf+ola0V9t4i8rwCMGvzkssGaxY/5zNSZO9BgSgfN0WzgmBEOy/3R4km Yn5KH94NltJYAAE5hqkFmAwK6psOqAR9cxHrRfU+gV2KO8pCDc6K/htkQcd/mclJYpCHp6Eq EVJOiAxcNaYuHZkeMdXDuvvI5Rk82VHk84BGgxIqIrhLlkguoPbXOOa+8c/Mpb1sRAGZEOuX EzKNC49+GS9gKW6ISbanyPsGEcFyP7GKMzcHBPf3cPrewZQZ6gBoNscasL6IJeAQDqzQAxbU GjO0qBSMRgnLXK7+DJlxrYdHGXqNbV6AYsmHJ6c2WWWiuRviFBqXinlgJ2FnYebZPAfWibkB DQRcsMzkAQgA1Dpo/xWS66MaOJLwA28sKNMwkEk1Yjs+okOXDOu1F+0qvgE8sVmrOOPvvWr4 axtKRSG1t2QUiZ/ZkW/x/+t0nrM39EANV1VncuQZ1ceIiwTJFqGZQ8kb0+BNkwuNVFHRgXm1 qzAJweEtRdsCMohB+H7BL5LGCVG5JaU0lqFU9pFP40HxEbyzxjsZgSE8LwkI6wcu0BLv6K6c Lm0EiHPOl5G8kgRi38PS7/6s3R8QDsEtbGsYy6O82k3zSLIjuDBwA9GRaeigGppTxzAHVjf5 o9KKu4O7gC2KKVHPegbXS+GK7DU0fjzX57H5bZ6komE5eY4p3oWT/CwVPSGfPs8jOwARAQAB iQE8BBgBCAAmFiEEmuvCXT0aY6hs4SbWeVOEFl5WrMgFAlywzOQCGwwFCQHhM4AACgkQeVOE Fl5WrMhmjQf/dBCjAVn1J0GzSsHiLvSAQz1cchbdy8LD0Tnpzjgp5KLU7sNojbI8vqt4yKAi cayI88j8+xxNXPMWM4pHELuUuVHS5XTpHa/wwulUtI5w/zyKlUDsIvqTPZLUEwH7DfNBueVM WyNaIjV2kxSmM8rNMC+RkgyfbjGLCkmWsMRVuLIUYpl5D9WHmenUbiErlKU2KvEEXEg/aLKq 3m/AdM9RAYsP9O4l+sAZEfyYoNJzDhTZMzn/9Q0uFPLK9smDQh4WBTFaApveVJPHRKmHPoNF Xxj+yScYdQ4SKH34WnhNSELvnZQ3ulH5tpASmm0w+GxfZqSc8+QCwoKtBRDUxoE56A== Message-ID: <62fc92d6-7a31-9dac-d237-082cc71d0dd9@sentex.net> Date: Fri, 24 Jan 2020 10:33:59 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US X-Rspamd-Queue-Id: 48438R591yz4BJs X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of mike@sentex.net designates 2607:f3e0:0:3::19 as permitted sender) smtp.mailfrom=mike@sentex.net X-Spamd-Result: default: False [-2.71 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ptr]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; HFILTER_HELO_IP_A(1.00)[pyroxene2a.sentex.ca]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; DMARC_NA(0.00)[sentex.net]; TO_DN_ALL(0.00)[]; HFILTER_HELO_NORES_A_OR_MX(0.30)[pyroxene2a.sentex.ca]; IP_SCORE(-1.71)[ipnet: 2607:f3e0::/32(-4.93), asn: 11647(-3.54), country: CA(-0.09)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:11647, ipnet:2607:f3e0::/32, country:CA]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Jan 2020 15:34:00 -0000 On a backup server, I want to export a zfs snapshot via nfs, but I cant seem to do it. given the snapshot is backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 I can do something locally like mkdir /tmpmount add /tmpmount       -maproot=nobody   192.168.13.36 and from the client machine mount /tmpmount. But if I do on the server mount -t zfs backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 /tmpmount and then try and mount from the client, I get a permission denied. I can work around it by creating a quick clone of the snapshot and mounting the clone.  But was curious as to why I cant do it the first way ? server is releng12 and nfsv3     ---Mike From owner-freebsd-fs@freebsd.org Fri Jan 24 22:47:05 2020 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 49B481FE816 for ; Fri, 24 Jan 2020 22:47:05 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from CAN01-QB1-obe.outbound.protection.outlook.com (mail-qb1can01on0622.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe5c::622]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "GlobalSign Organization Validation CA - SHA256 - G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 484Dm74ljXz4fdy for ; Fri, 24 Jan 2020 22:47:03 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) ARC-Seal: i=1; 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FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a01:111:f400::/48]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[uoguelph.ca]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; IP_SCORE(-1.38)[ipnet: 2a01:111:f000::/36(-3.81), asn: 8075(-3.03), country: US(-0.05)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:8075, ipnet:2a01:111:f000::/36, country:US]; ARC_ALLOW(-1.00)[i=1] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Jan 2020 22:47:05 -0000 mike tancsa wrote:=0A= >On a backup server, I want to export a zfs snapshot via nfs, but I cant=0A= >seem to do it.=0A= >=0A= >given the snapshot is=0A= >backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000=0A= >=0A= >I can do something locally like=0A= >=0A= >mkdir /tmpmount=0A= >=0A= >add=0A= >=0A= >/tmpmount -maproot=3Dnobody 192.168.13.36=0A= >=0A= >and from the client machine mount /tmpmount.=0A= >=0A= >But if I do on the server=0A= >=0A= >mount -t zfs=0A= >backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 /tmpmou= nt=0A= >=0A= >and then try and mount from the client, I get a permission denied.=0A= >=0A= >I can work around it by creating a quick clone of the snapshot and=0A= >mounting the clone. But was curious as to why I cant do it the first way = ?=0A= >=0A= >server is releng12 and nfsv3=0A= I am happy to say I never use ZFS, but if I were to guess, it will have som= ething=0A= to do with the fsid of the file system.=0A= =0A= NFSv3 mounts do not cross server mount points (which are recognized by a ch= ange=0A= in the FSID). I believe that a snapshot appears to be a different file syst= em (ie. different=0A= FSID). ZFS does some sort of weird "pseudo mount" of snapshots, I think?=0A= =0A= You did not mention doing a separate export line for the snapshot, which wo= uld be=0A= needed to mount it, if it is a different FSID.=0A= --> You could try...=0A= 1 - Adding an export line to /etc/exports for the snapshot's directory path= .=0A= or=0A= 2 - Use an NFSv4 mount of a higher level directory, since NFSv4 does cross = server=0A= mountpoints/FSID changes.=0A= =0A= rick=0A= =0A= ---Mike=0A= =0A= =0A= _______________________________________________=0A= freebsd-fs@freebsd.org mailing list=0A= https://lists.freebsd.org/mailman/listinfo/freebsd-fs=0A= To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"=0A=