[OpenAFS] Relocating to new machine
I am running an AFS cell for a Debian cluster and now in the process of
relocating the openafs-dbserver and openafs-fileserver to a new machine. I
am thinking the below would be what I generally need to do, but I am hoping
someone more experienced with AFS would provide feedback.
The old machine is Debian 7, the new is 8.
1. Install openafs-dbserver and openafs-fileserver on new machine.
2. Configure new machine as 'secondary site' for the OpenAFS admin
databases with the 'synchronization site' being the old machine.
3. Set the new machine as the synchronization site, thus turning the old
machine into just a secondary site.
4. Move volumes ('vos move') from the old machine to the new machine.
5. Stop the old machine from acting as secondary site.
Any feedback is appreciated.
Youssef Eldakar
Bibliotheca Alexandrina
Re: [OpenAFS] Re: Transferring data from old server to new server
On Mon, Aug 13, 2012 at 2:19 PM, Dirk Heinrichs dirk.heinri...@altum.dewrote: Am Montag 13 August 2012, 15:07:00 schrieb Youssef Eldakar: Just want to make sure, to move everything, is it enough to just move the root.afs volume? No. root.afs just acts as an anchor for all your other volumes. As such, it is more or less empty (it usually only contains the mount points for root.cell, which in turn contains a tree of your data volumes). Thanks for all the help. I was able to successfully move volumes using 'vos move'. Now, I see that in order to be able to shut down the old server, I also have to move the 'dbserver'. I tried searching for instructions on doing that but was not quite successful. Any pointers would be much appreciated. Youssef Eldakar Bibliotheca Alexandrina
Re: [OpenAFS] Re: Transferring data from old server to new server
On Tue, Aug 14, 2012 at 3:32 PM, Lars Schimmer l.schim...@cgv.tugraz.atwrote: On 14.08.2012 14:55, Youssef Eldakar wrote: Thanks for all the help. I was able to successfully move volumes using 'vos move'. Now, I see that in order to be able to shut down the old server, I also have to move the 'dbserver'. I tried searching for instructions on doing that but was not quite successful. Any pointers would be much appreciated. Hi moving a DB server is not as trivial as moving the data. For a start you can setup a new db server for your cell on the new server and start it beside your old one - if done fine, they do sync automatic and both will work as expected. Now you need to see how your clients get known to the DB server - via CellServDB or via DNS entries - in no.1 you need to change the cellServDB on each client, on case no.2 you need to change the DNS entries. Afterwards you can stop the old DB server and the new one should serv all the data for your clients. I´ve done it a few times already and it is possible. OK, I will give it a try. Would the following be the right procedure to use? http://docs.openafs.org/QuickStartUnix/ch03s02.html Youssef Eldakar Bibliotheca Alexandrina MfG, Lars Schimmer -- - TU Graz, Institut für ComputerGraphik WissensVisualisierung Tel: +43 316 873-5405 E-Mail: l.schim...@cgv.tugraz.at Fax: +43 316 873-5402 PGP-Key-ID: 0x4A9B1723 ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
Re: [OpenAFS] Re: Transferring data from old server to new server
On Thu, Jul 26, 2012 at 4:41 PM, Andrew Deason adea...@sinenomine.netwrote: On Thu, 26 Jul 2012 14:22:25 +0300 Youssef Eldakar youssefelda...@gmail.com wrote: 1.4.12+dfsg-3+ubuntu0.1. I am planning to replace this OpenAFS server with another one on another machine running Ubuntu 12.04, which comes with OpenAFS version 1.6.1-1. What's the simplest way to transfer the data over to the new server? Would just rsyncing /vicepa work? As Lars mentions, using 'vos move' is often the best way; the way most likely to not have problems. If you 'vos move' all of the data, make sure to keep the old server on for at least 2 hours after everything has moved before turning it off, so clients have a chance to notice that their data has moved. Just want to make sure, to move everything, is it enough to just move the root.afs volume? Thanks. Youssef Eldakar Bibliotheca Alexandrina
Re: [OpenAFS] Re: Transferring data from old server to new server
On Thu, Jul 26, 2012 at 4:41 PM, Andrew Deason adea...@sinenomine.netwrote: On Thu, 26 Jul 2012 14:22:25 +0300 Youssef Eldakar youssefelda...@gmail.com wrote: 1.4.12+dfsg-3+ubuntu0.1. I am planning to replace this OpenAFS server with another one on another machine running Ubuntu 12.04, which comes with OpenAFS version 1.6.1-1. What's the simplest way to transfer the data over to the new server? Would just rsyncing /vicepa work? As Lars mentions, using 'vos move' is often the best way; the way most likely to not have problems. If you 'vos move' all of the data, make sure to keep the old server on for at least 2 hours after everything has moved before turning it off, so clients have a chance to notice that their data has moved. Thanks for that advice. If you cannot or do not want to do that, yes, you can just rsync the /vicep* directories (make sure you use -a). If you do that, you will also want to sync the /var/lib/openafs/local directory (do _not_ do this if you 'vos move' the data instead). And for this addition. It helps to know the transfer is also doable via rsync. -- Andrew Deason adea...@sinenomine.net ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
[OpenAFS] Transferring data from old server to new server
1.4.12+dfsg-3+ubuntu0.1. I am planning to replace this OpenAFS server with another one on another machine running Ubuntu 12.04, which comes with OpenAFS version 1.6.1-1. What's the simplest way to transfer the data over to the new server? Would just rsyncing /vicepa work? Thank you for advising.
Re: [OpenAFS] Re: PAG creation failed: No such file or directory
On 07/17/2011 11:29 PM, Russ Allbery wrote:
That log message indicates that one of:
fd = open(/proc/fs/openafs/afs_ioctl, O_RDWR);
ioctl(fd, _IOW('C', 1, void *),syscall_data);
returned ENOENT. I don't think there's any other way to generate that
message. The latter seems unlikely.
A host just did it again. I checked /proc/fs/openafs/afs_ioctl, and it
actually does exist.
--
Youssef Eldakar
Bibliotheca Alexandrina
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Re: [OpenAFS] PAG creation failed: No such file or directory
On 07/15/2011 10:09 PM, Russ Allbery wrote: Youssef Eldakaryoussef.elda...@bibalex.org writes: In a network where an OpenAFS cell is set up to serve 1000+ clients, a host would occasionally fail to change to a user's home directory upon login with the following line in auth.log: Jul 15 15:05:56 ia711225 sshd[10679]: (pam_afs_session): PAG creation failed: No such file or directory That's a very strange error message to receive. The only way that I can see that failing with that error message if you're using the built-in kafs library is if ioctl returned ENOENT or if it failed without setting errno at all. How is pam_afs_session built for this system? Is it using libkopenafs or libkafs, or is it using its built-in kafs implementation? Those are the libraries /lib/security/libpam_afs_session.so links to: linux-vdso.so.1 = (0x7fffc01ff000) libpam.so.0 = /lib/libpam.so.0 (0x7f04f81de000) libkrb5.so.3 = /usr/lib/libkrb5.so.3 (0x7f04f7f1c000) libc.so.6 = /lib/libc.so.6 (0x7f04f7b98000) libdl.so.2 = /lib/libdl.so.2 (0x7f04f7994000) libcrypt.so.1 = /lib/libcrypt.so.1 (0x7f04f775b000) libk5crypto.so.3 = /usr/lib/libk5crypto.so.3 (0x7f04f7534000) libcom_err.so.2 = /lib/libcom_err.so.2 (0x7f04f733) libkrb5support.so.0 = /usr/lib/libkrb5support.so.0 (0x7f04f7128000) libkeyutils.so.1 = /lib/libkeyutils.so.1 (0x7f04f6f24000) libresolv.so.2 = /lib/libresolv.so.2 (0x7f04f6d0b000) /lib64/ld-linux-x86-64.so.2 (0x7f04f8601000) libpthread.so.0 = /lib/libpthread.so.0 (0x7f04f6aee000) I see no libkopenafs and no libkafs, which I suppose means it's using its built-in kafs implementation. This pam_afs_session is just the one shipped with Ubuntu 10.10: libpam-afs-session 1.7-2. -- Youssef Eldakar Bibliotheca Alexandrina ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
[OpenAFS] PAG creation failed: No such file or directory
In a network where an OpenAFS cell is set up to serve 1000+ clients, a host would occasionally fail to change to a user's home directory upon login with the following line in auth.log: Jul 15 15:05:56 ia711225 sshd[10679]: (pam_afs_session): PAG creation failed: No such file or directory Simply typing aklog right after login successfully acquires tokens, and the user is able to access their home directory. Subsequent logins have no problem changing to the user's home directory for a while (perhaps the Kerberos ticket lifetime). However, to make the problem go away completely, I found no solution but to reboot the host. The server is running Linux 2.6.32 and OpenAFS 1.4.12. The clients are running Linux 2.6.35 and OpenAFS 1.4.12.1. And this is how /etc/pam.d/common-session looks like: sessionrequiredpam_unix.so sessionoptionalpam_krb5.so minimum_uid=1000 sessionoptionalpam_afs_session.so I also had program=/usr/bin/aklog in the last line for a while, but the problem still occured. The line in auth.log above indicates that pam_afs_session complains about a file that does not exist but does not tell what the name of that file is. Any suggestions on how to better troubleshoot the problem are appreciated. -- Youssef Eldakar Bibliotheca Alexandrina ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
[OpenAFS] /vicepa on Linux RAID
Should OpenAFS have problems with a /vicepa that exists on a Linux RAID (e.g. /dev/md0) device? I am trying to set up an OpenAFS server on Ubuntu 10.04 (openafs-fileserver/openafs-dbserver 1.4.12+dfs), but when I get to making the root volume (afs-rootvol), the machine crashes, and I am thinking if this has to do with /vicepa being on a Linux RAID-5 device. Thank you for any information. Youssef Eldakar Bibliotheca Alexandrina ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
[OpenAFS] /vicepa on Linux RAID
Should OpenAFS have problems with a /vicepa that exists on a Linux RAID (e.g. /dev/md0) device? I am trying to set up an OpenAFS server on Ubuntu 10.04 (openafs-fileserver/openafs-dbserver 1.4.12+dfs), but when I get to making the root volume (afs-rootvol), the machine crashes, and I am thinking if this has to do with /vicepa being on a Linux RAID-5 device. Thank you for any information. Youssef Eldakar Bibliotheca Alexandrina ___ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
