Does FOG work with iSCSI?

[Tom Elliott]

@Wayne-Workman iSCSI shows up as if it’s a physical volume. iSCSI is block level so you can export it.

[Wayne Workman]

@Tom-Elliott Ah… See that’s why I hang around here lol. Learn new stuff all the time.

[ManofValor]

@Tom-Elliott Thank you Tom. I’ve done some of the stuff in the links, I am connected to my NAS, but this is the first I’ve seen of some of this. I guess I need to learn how to search better. As I said I am connected I just haven’t been sure if it was working yet, mostly because this NAS doesn’t support CLI or the ability to go in and see what’s on the drives. I’ve never seen a storage unit that doesn’t let you see what’s on it.

I agree about it taking a long time but I don’t think either of us, my boss and I, expected it to take this long either. It doesn’t bother him though because he it’s a good learning experience. In the beginning he wanted to use FOG because it was free and he’s heard good things about it. Also, we have this old NAS, that I now hate, that he is wanting to utilize, but again we didn’t think it would take this long. I have enjoyed learning about Linux, mostly, so I guess there’s that. I really appreciate you guys helping me, I know I ask a lot of dumb questions. With this experience I’ve been to other sites and asked for help with other stuff and there is nobody else I’d rather learn this stuff, even FOG aside, than you guys. Y’all have been awesome.

[Tom Elliott]

@ManofValor iscsi is block level. You will never see the data on the drive.

[Wayne Workman]

@ManofValor once it’s mounted and configured tho, you can browse it from the server’s OS.

[ManofValor]

@Tom-Elliott Oh is that what that means…lol. Thanks, I really didn’t know that.

[ManofValor]

@Wayne-Workman Oh ok. Cool.

[Tom Elliott]

@ManofValor What I mean, that was by cell phone voice to text translation. Essentially, what a “block level” device is, it is a device that operates at the block level. This is how HDD’s operate. In the iscsi world a section of the space is delved out. The receiving (target) of the initiator can use the point as if it were a local device. Think CD Drive, or HDD (more appropriate).

You can move where that point mounts and even mount the same device on different systems (though I’d highly recommend it).

The SAN (Storage Area Network) is the most often place I’ve seen high use of iSCSI. NAS simply means (Network Attached Storage) which can mean any number of things. I suppose iSCSI is the same type of thing.

Please understand, I know people come from different experience levels and know different things. I know you have to start somewhere. Most work up from a lower point though. Not in an IT position already trying to integrate advanced items to a system that’s hardly known about in their already existing environment.

[ManofValor]

@Tom-Elliott Gotcha.

[Wayne Workman]

Yup. Although I entered my first job with education and certs, I was just a lab assistant helping people with computer usage, i.t. homework, and filling paper in printers. I quickly gained experience and responsibilities though, and my boss let me do way more stuff than what was on my job description back then. Of course I thought I knew it all from the git-go… people in i.t. who continually move up are those who constantly learn, make mistakes and learn more, and continually do more… every day.

[ManofValor]

Curious, why do I have two of the same sd’s, sdb and sdc? I was going to partition one, I guess it doesn’t matter but just wondering.

[root@localhost images]# dmesg | grep sd
[    4.849861] sd 1:0:0:0: [sda] 976707632 512-byte logical blocks: (500 GB/465 GiB)
[    4.850038] sd 1:0:0:0: [sda] Write Protect is off
[    4.850041] sd 1:0:0:0: [sda] Mode Sense: 6b 00 00 08
[    4.850145] sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[    4.854445]  sda: sda1 sda2 sda3 sda4 < sda5 sda6 >
[    4.855586] sd 1:0:0:0: [sda] Attached SCSI disk
[    8.932316] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[   10.314292] sd 1:0:0:0: Attached scsi generic sg0 type 0
[   12.148400] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
[   18.889193] talpa-vfshook: nfsd is on the skip list, not patching
[   25.390122] sd 5:0:0:0: Attached scsi generic sg3 type 0
[   25.391593] sd 5:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   25.391837] sd 5:0:0:0: [sdb] 17488150528 512-byte logical blocks: (8.95 TB/8.14 TiB)
[   25.392079] sd 5:0:0:0: [sdb] Write Protect is off
[   25.392083] sd 5:0:0:0: [sdb] Mode Sense: 77 00 00 08
[   25.392599] sd 5:0:0:0: [sdb] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
[   25.393716] sd 5:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   25.420711]  sdb: unknown partition table
[   25.421463] sd 5:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   25.423684] sd 5:0:0:0: [sdb] Attached SCSI disk
[   25.464766] sd 6:0:0:0: Attached scsi generic sg4 type 0
[   25.466368] sd 6:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
[   25.466836] sd 6:0:0:0: [sdc] 17488150528 512-byte logical blocks: (8.95 TB/8.14 TiB)
[   25.467369] sd 6:0:0:0: [sdc] Write Protect is off
[   25.467373] sd 6:0:0:0: [sdc] Mode Sense: 77 00 00 08
[   25.468057] sd 6:0:0:0: [sdc] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
[   25.468843] sd 6:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
[   25.474337]  sdc: unknown partition table
[   25.475430] sd 6:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
[   25.476647] sd 6:0:0:0: [sdc] Attached SCSI disk
[10997.260848] nfsd: last server has exited, flushing export cache

[ManofValor]

I’m not sure I quite understand this message during the FOG install/update. Am I supposed to add those two lines to the .fogsettings file, cause I don’t see them in there? If so, does it matter where it goes?

 ########################################################################################
   FOG has adjusted to using a login system to protect what can/cannot be downloaded
   We have detected that you don't have credentials defined to perform the backup
   If you would like the database to be backed up during install please define
   in your /opt/fog/.fogsettings file

   fogguiuser='usernameOfFOGGUI'
   fogguipass='passwordOfFOGGUIUser'

   You can also re-run this installer as:

   fogguiuser='usernameOfFOGGUI' fogguipass='passwordOfFOGGUIUser' ./installfog.sh -y
########################################################################################

Also, I believe I’ve got the iSCSI mounted right and ready to try an image.

# /etc/fstab
# Created by anaconda on Thu Feb 18 14:47:41 2016
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos00-root00 /                       ext4    defaults        1 1
UUID=31117e50-bdd0-446a-8527-e08cebd24684 /boot                   ext4    defaults        1 2
/dev/mapper/fog-opt_fog_images /opt                    ext4    defaults        1 2
/dev/mapper/centos00-swap swap                    swap    defaults        0 0
/opt/fog/images /images bind bind 0 0
/dev/sdb1 /opt/fog/images 

[root@localhost bin]# df -H
Filesystem                      Size  Used Avail Use% Mounted on
/dev/mapper/centos00-root00      22G  7.4G   13G  37% /
devtmpfs                        2.0G     0  2.0G   0% /dev
tmpfs                           2.0G  6.6M  2.0G   1% /dev/shm
tmpfs                           2.0G  9.4M  2.0G   1% /run
tmpfs                           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda5                       1.1G  308M  639M  33% /boot
/dev/mapper/fog-opt_fog_images  424G  240G  163G  60% /opt
/dev/sdb1                       8.9T   95M  8.5T   1% /images
tmpfs                           397M  8.2k  397M   1% /run/user/1000
tmpfs                           397M     0  397M   0% /run/user/0

[root@localhost bin]# ls /opt/fog/images -a
.  ..  dev  lost+found  .mntcheck  postdownloadscripts
[root@localhost bin]# ls /opt/fog/images/dev -a
.  ..  .mntcheck

[Tom Elliott]

@ManofValor I think you are almost there.

Last bit, I’d do if I were you.

Make sure permissions are proper.

Run: chmod =R 777 /images

Then run her up and see how it goes.

[ManofValor]

@Tom-Elliott Awesome thanks. What about the first question, the FOG update one?

[Wayne Workman]

@ManofValor said in Does FOG work with iSCSI?:

@Tom-Elliott Awesome thanks. What about the first question, the FOG update one?

It’s not critical, but for backups to automatically happen when you re-run the installer or update, you need those fields inside of /opt/fog/.fogsettings just like it says. All you’d do is just add them, just as it says.

Also, the command Tom gave has a typo. He was probably on cellular.

It’s chmod -R 777 /images

[ManofValor]

@Wayne-Workman said in Does FOG work with iSCSI?:

It’s not critical, but for backups to automatically happen when you re-run the installer or update, you need those fields inside of /opt/fog/.fogsettings just like it says. All you’d do is just add them, just as it says.

Ok, thanks.

Also, the command Tom gave has a typo. He was probably on cellular.

It’s chmod -R 777 /images

Yeah I caught that. See I’m learning something…lol.

[ManofValor]

Also, I’m still getting this error when clicking on the FOG Configuration in fog management.

Not Found

The requested URL /static/index.html was not found on this server.

[Wayne Workman]

@ManofValor you could try blasting everything in /var/www except the html directory, and the blast everything inside of /var/www/html directory, and then re-run the installer.

[ManofValor]

@Wayne-Workman When you say blast I assume you mean delete? Just making sure its not another term or something…lol.

[Wayne Workman]

@ManofValor yes. Blast sounds so much more exciting than delete.

rm -rf NameOfFileOrDirectory