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dylanthomasfan
n00b
Joined: 02 Mar 2005
Posts: 27
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 Posted: Sun Apr 24, 2011 9:58 pm Post subject: Gentoo NFS server, ubuntu client: Can mount but no files |
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Hello,
I am running gentoo-2.6.37-r4 on an AMD64 machine A=10.10.1.3. I am sharing this with another machine, a Ubuntu maverick, with IP 10.10.1.4 (B). So, I export my filesystem like so on machine A.
| Code: | MACHINE-A # more /etc/exports
/storage/ 10.10.1.4(async,ro,no_subtree_check,all_squash,anonuid=1000,anongid=1000)
MACHINE-A # ls -l /storage
total 12
drwxrwxrwx 41 someuser someuser 4096 Apr 13 21:30 mp3
drwxrwxrwx 33 someuser someuser 4096 Apr 18 21:54 music
drwxrwxrwx 4 someuser someuser 4096 Apr 12 21:12 photos
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I then and then | Code: | | /etc/init.d/nfs restart |
and confirm that nfs is running and will accept both NFS version 2 and 3:
| Code: |
MACHINE-A # rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 46481 status
100024 1 tcp 54519 status
100005 1 udp 47437 mountd
100005 1 tcp 48181 mountd
100005 2 udp 47768 mountd
100005 2 tcp 53891 mountd
100005 3 udp 42775 mountd
100005 3 tcp 44776 mountd
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100021 1 udp 34369 nlockmgr
100021 3 udp 34369 nlockmgr
100021 4 udp 34369 nlockmgr
100021 1 tcp 56195 nlockmgr
100021 3 tcp 56195 nlockmgr
100021 4 tcp 56195 nlockmgr
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On my Ubuntu machine, I mount the share like so:
| Code: | | UBUNTUMACHINE-B # mount MACHINE-A:/storage/ /nfs/ |
Then, I am able to see directories music, photos and mp3 when I do
| Code: | | UBUNTUMACHINE-B # ls /nfs/ |
but when I get into one of the directories, I don't see any files. I suspect this is a file permissions issue, but how do I go about fixing this? |
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krinn
Watchman
Joined: 02 May 2003
Posts: 7470
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| Posted: Mon Apr 25, 2011 12:47 am Post subject: |
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because you are mounting them as nfsv4, while your export is valid for nfsv3, it is not for nfsv4, where first directory is your root directory, and then any directories in it must appears with their own rules (i'm still speaking about nfsv4). It's not really even valid for nfsv4, root directory must have fsid=0 but last time i check, if i'm not wrong, nfs was applying it to the first one it see if none with fsid=0 could be found.
imo, it's a design fault, they should have enforce strict format when using an nfsv4 server for exports, and force an nfsv2/3 export inside it to respect the v4 design.
make sure your ubuntu is mounting them as nfsv3, i suppose it works like in gentoo, add -o nfsvers=3 and try add the -v to see what is going on
remember that even you are using nfs as mount option, nfs might not be equal to nfs4 per default (as it is not the case in gentoo), and it's even simplier for your case, you didn't tell the server what version to use, so server decide what version to provide.
and your gentoo server is able to do nfsv4, so if anyone ask a default nfs sharing, your server will provide v4 first, and if your client accept it, all nfsv4 rules will be applied.
And gave your directories the nohide option (and not only to your root directory), if your client is nfsv3 only (i know 0 about ubuntu), the nohide should be enough for your problem. |
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dylanthomasfan
n00b
Joined: 02 Mar 2005
Posts: 27
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| Posted: Mon Apr 25, 2011 1:50 pm Post subject: [Solved] Silly error: each mount point is an export |
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Thanks for your response, krinn, but it happens to be a rather silly error on my part. I have now resolved the problem, and I see the remote files on the client exactly with the same permissions etc. The key idea is that each mount point gets an export--at least that's how I re-cast the exports and now I see all the files. Let me explain.
On MACHINE-A, I have the following mount points:
| Code: |
/dev/sdb1 /storage/music
/dev/sdb2 /storage/mp3
/dev/sdb3 /storage/photos
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Now, the /etc/exports file should read
| Code: |
/storage/music/ 10.10.1.4(async,ro,no_subtree_check,all_squash,anonuid=1000,anongid=1000)
/storage/mp3/ 10.10.1.4(async,ro,no_subtree_check,all_squash,anonuid=1000,anongid=1000)
/storage/photos/ 10.10.1.4(async,ro,no_subtree_check,all_squash,anonuid=1000,anongid=1000)
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You will note that earlier, I was (incorrectly) exporting /storage like so:
| Code: | | /storage/ 10.10.1.4(async,ro,no_subtree_check,all_squash,anonuid=1000,anongid=1000) |
I have the same user with the same UID/GID on both machines, so I don't need the anonuid and anongid clauses in the exports.
I think it is easy to make this mistake, so I wanted to post this resolution to help other folks. Thanks for your time. |
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