Re: [libvirt-users] Libvirtd running as root tries to access oneadmin (OpenNebula) NFS mount but throws: error: can’t canonicalize path

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On 4/12/2016 4:36 PM, Martin Kletzander wrote:
On Tue, Apr 12, 2016 at 10:29:29PM +0200, Martin Kletzander wrote:
On Tue, Apr 12, 2016 at 03:55:45PM -0400, TomK wrote:
On 4/12/2016 3:40 PM, Martin Kletzander wrote:
[ I would be way easier to reply if you didn't top-post ]

On Tue, Apr 12, 2016 at 12:07:50PM -0400, TomK wrote:
On 4/12/2016 11:45 AM, John Ferlan wrote:
What got my attention was the error message "initializing FS storage
file" with the "file:" prefix to the name and 9869:9869 as the uid:gid
trying to access the file (I assume that's oneadmin:oneadmin on your
system).


I totally missed this.  So the only thing that popped on my mind now was
checking the whole path:

 ls -ld /var{,/lib{,/one{,/datastores{,/0{,/38{,/disk.1}}}}}}

You can also run it as root and oneadmin, however after reading through
all the info again, I don't think that'll help.

I top post by default in thunderbird and we have same setup at work with
M$ LookOut.  Old habits are to blame I guess.  I'll try to reply  like
this instead.  But yeah it's terrible for mailing lists to top post.
Here's the output and thanks again:

[oneadmin@mdskvm-p01 ~]$ ls -ld
/var{,/lib{,/one{,/datastores{,/0{,/38{,/disk.1}}}}}}
drwxr-xr-x. 21 root     root       4096 Apr 11 07:10 /var
drwxr-xr-x. 45 root     root       4096 Apr 12 07:58 /var/lib
drwxr-x---  12 oneadmin oneadmin   4096 Apr 12 15:50 /var/lib/one

Look ^^, maybe for a quick workaround you could try doing:

 chmod o+rx /var/lib/one


Actually, o+x ought to be enough.

Let me know if that does the trick (at least for now).

drwxrwxr-x   6 oneadmin oneadmin     46 Mar 31 02:44 /var/lib/one/datastores
drwxrwxr-x   6 oneadmin oneadmin     42 Apr  5 00:20
/var/lib/one/datastores/0
drwxrwxr-x   2 oneadmin oneadmin     68 Apr  5 00:20
/var/lib/one/datastores/0/38
-rw-r--r--   1 oneadmin oneadmin 372736 Apr  5 00:20
/var/lib/one/datastores/0/38/disk.1
[oneadmin@mdskvm-p01 ~]$

That's the default setting but I think I see what you're getting at that
permissions get inherited?


No, I just think you need eXecute on all parent directories.  That
shouldn't hinder your security and could help.

Cheers,
Tom K.
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The execute permissions did the trick to allow creation.  So that's good.  There's still the write and I'm thinking you intend this as a workaround since oneadmin should be able to write in there with other being --- .  The auto deployment of cloud virtuals would still fail then when writes are attempted. 

[oneadmin@mdskvm-p01 ~]$ virsh -d 1 --connect qemu:///system create /var/lib/one//datastores/0/38/deployment.0
create: file(optdata): /var/lib/one//datastores/0/38/deployment.0
Domain one-38 created from /var/lib/one//datastores/0/38/deployment.0
[oneadmin@mdskvm-p01 ~]$


Now should this work without any permissions on other for the unprivileged user oneadmin?  Thinking Yes per John Forlan's reply?

[oneadmin@mdskvm-p01 0]$ virsh -d 1 --connect qemu:///system create /var/lib/one//datastores/0/24/deployment.0
create: file(optdata): /var/lib/one//datastores/0/24/deployment.0
error: Failed to create domain from /var/lib/one//datastores/0/24/deployment.0
error: can't canonicalize path '/var/lib/one//datastores/0/24/disk.1': Permission denied
[oneadmin@mdskvm-p01 0]$



Cheers,
Tom K.
-------------------------------------------------------------------------------------
Living on earth is expensive, but it includes a free trip around the sun.

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