Hi guys, This looks like a good Q&A thread to add to http://community.gluster.org/ Just a friendly reminder that we like to add more of these instructive dialogues to the Q&A site (it's "sticky" and google-friendly). -JM ----- Original Message ----- > Hy, > > I've further investigated your problem, and found a solution, with a > test setup. > > i've created a volume: > # gluster volume create test replica 2 transport tcp node1:/brick > node1:/brick2 > # gluster volume start test > > then mounted with gluster: > # mount.glusterfs node1:/test /mnt > > mounted the brick directly to a read-only directory, with --bind: > # mount --bind /brick ~/test_read_only > # mount --bind -o remount,ro /brick ~/test_read_only > > # touch ~/test_read_only/file > touch: cannot touch `teszt/asd': Read-only file system > > Becouse it's a bind mount to the native brick, on ext4 filesystem, it > has better performance for read, than through cluster mount, and the > read-only mount prevents any file writes. This works only if you > need to access the files on the same machine, which the gluster > runs. > > Ps: sorry for my terrible english :) > > -- > ?dv?zlettel, > Francsics Bal?zs > Netrix Internet > > > On Friday, March 23, 2012 at 9:12 AM, Haris Zukanovic wrote: > > > Hi Francis, > > > > Thanx for the suggestion.. > > > > I tried this. I set 644 owner root on the brick directory. > > Apache is not able to read the PHP files from under the brick > > folder. > > 2012/03/23 09:04:32 [crit] 15752#0: *137813 stat() > > "/var/www/gluster-application-read-only/www/staging/failover-test/web/server-health.php" > > failed (13: Permission denied), client: *.*.107.216, server: > > *.failover.myserver.com (http://failover.myserver.com), request: > > "GET /server-health.php HTTP/1.1", host: > > "test.failover.myserver.com (http://test.failover.myserver.com)" > > > > Apache seems to be unable to change into brick dir since it has no > > x permission. > > If I set the x for other users (apache) on the brick then since > > apache user is owner of all the files it will be able to overwrite > > it also using the path directly through the brick. > > I maybe missing something? > > > > > > > > On 23/03/12 08.20, Francsics Bal?zs wrote: > > > Gluster runs on the gluster user, right? If you set the brick > > > permission to 644, and you read the files with a different user, > > > you cannot write to the dir. > > > > > > -- > > > Francsics Bal?zs > > > Sent with Sparrow (http://www.sparrowmailapp.com/?sig) > > > > > > > > > On 2012. March 22., Thursday at 22:18, Haris Zukanovic wrote: > > > > > > > Great to hear that... > > > > All my tests so far have also confirmed that there are no > > > > problems when you only read from the brick dir. > > > > However, I would like somehow to prevent accidentals writes if > > > > possible. Do you have any suggestions on how to accomplish > > > > that? > > > > In fact, I am unable to allow writes to a file through the > > > > Gluster mount and allow to read but not write on the brick > > > > directory directly. > > > > > > > > > > > > > > > > On 22/03/12 20.47, winyaa at gmail.com (mailto:winyaa at gmail.com) > > > > wrote: > > > > > If you are on the same machine, which the gluster runs from, > > > > > and you are using replicated setup, you can read from the > > > > > brick directly, but avoid to write into the brick dir, > > > > > becouse it leads to data inconsistency. > > > > > 2012.03.22. 20:06, "Haris Zukanovic" > > > > > <haris.zukanovic74 at gmail.com > > > > > (mailto:haris.zukanovic74 at gmail.com)> ezt ?rta: > > > > > > Thanx for your input... > > > > > > Do you mean that I should mount the brick through NFS to > > > > > > make the brick read-only? I would like to avioid that. I > > > > > > am on the same physical machine where the brick is. > > > > > > > > > > > > > > > > > > On 22/03/12 19.56, Berend de Boer wrote: > > > > > > > > > > > > "Haris" == Haris > > > > > > > > > > > > Zukanovic<haris.zukanovic74 at gmail.com > > > > > > > > > > > > (mailto:haris.zukanovic74 at gmail.com)> writes: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Haris> Anyhow, everything seems to work fine for now but > > > > > > > the read > > > > > > > Haris> performance is a problem. > > > > > > > > > > > > > > Try mounting the volume with nfs and see if that improves > > > > > > > things. > > > > > > > > > > > > -- > > > > > > -- > > > > > > Haris Zukanovic > > > > > > > > > > > > _______________________________________________ > > > > > > Gluster-users mailing list > > > > > > Gluster-users at gluster.org > > > > > > (mailto:Gluster-users at gluster.org) > > > > > > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users > > > > > > > > > > > > > > > > > -- -- Haris Zukanovic > > > > -- -- Haris Zukanovic > > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >
