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From "Adam W. Dace" <colonelforbi...@gmail.com>
Subject Re: ATS Storage Question: Part 2
Date Sat, 19 Oct 2013 20:42:32 GMT
Yeah, I actually tried rebooting.  No mention of xvdc anywhere.  No device
in /dev/.

I'm starting to think I may need to stick with ext3 as at least that shows
up on my virtual machine...



On Sat, Oct 19, 2013 at 3:32 PM, Reindl Harald <h.reindl@thelounge.net>wrote:

>
> Am 19.10.2013 22:25, schrieb Adam W. Dace:
> > Huh.  I'm running Linux kernel:
> >
> > Linux sparkle.adamdace.info <http://sparkle.adamdace.info>
> 3.9.3-x86_64-linode33 #1 SMP Mon May 20 10:22:57 EDT
> > 2013 x86_64 x86_64 x86_64 GNU/Linux
> >
> > Does this sound right?  I'm thinking of trying to add:
> > KERNEL=="xvdc",OWNER="nobody"
> >
> > to the file /etc/udev/rules.d/60-raw.rules
> >
> > One other question...if I get this wrong somehow will my Linux server
> even boot?
>
> what are you doing here?
> you can't add any random crap
>
> you need to know the device on that machine and not write "xvdc" in a
> blackbox
> the udev-file is supposed to change the owner of the *existing device* at
> boot
> and not more but also not less, it would be the same "chown" it in a
> startup
> script before ATS mut this way more clean, i am on systemd environments
> where things are starting parallel
>
> so do you have a new, spare disk you can use at RAW disk?
> what device name has it?
>
> ls -lha /dev/ would be a starting point
>
> if you do not have a new virtual disk recognized by the kernel
> taht all make spretty no sense - if you added a virtual disk
> while the guest system is running maybe reboot it to recognize
> the new drive before continue doing anything else
>
> > On Sat, Oct 19, 2013 at 3:15 PM, Adam W. Dace <colonelforbin74@gmail.com<mailto:
> colonelforbin74@gmail.com>> wrote:
> >
> >     I actually tried using MAKEDEV to create /dev/xvdc, chowned it to
> "nobody", and then have ATS use that.
> >
> >     Unfortunately, then ATS gives me this error:
> >
> >     [Oct 19 13:13:55.782] Server {0x2aaaab113f60} WARNING: unable to
> open '/dev/xvdc': -6, No such device or address
> >     [Oct 19 13:13:55.782] Server {0x2aaaab113f60} WARNING: could not
> initialize storage "/dev/xvdc" [unable to open]
> >     [Oct 19 13:13:55.782] Server {0x2aaaab113f60} WARNING: no cache
> disks specified in
> >     /usr/local/etc/trafficserver/storage.config: cache disabled
> >
> >     Any ideas?  I feel like I'm missing something.
> >
> >
> >
> >     On Sat, Oct 19, 2013 at 3:06 PM, Reindl Harald <
> h.reindl@thelounge.net <mailto:h.reindl@thelounge.net>> wrote:
> >
> >
> >         Am 19.10.2013 21:39, schrieb Adam W. Dace:
> >         > This is really more of a Linux virtualization question, but
> I'd rather ask you people than bother the hosting
> >         > company if possible.
> >         >
> >         > First off, I was completely wrong about raw disk being
> available.  My apologies, I should've checked.
> >          That part is
> >         > simple...they have a nice web GUI for that.
> >         >
> >         > Virtualization Software: Xen
> >         > Host OS: CentOS 6.4
> >         >
> >         > What I'm stuck on is how do I access a raw disk volume from
> Linux?
> >         >
> >         > If it helps, my /etc/fstab looks like this:
> >         >
> >         > /dev/xvda       /               ext3
>  noatime,errors=remount-ro       0 1
> >         > /dev/xvdb       none            swap    sw
>          0 0
> >         > /proc           /proc           proc    defaults
>          0 0
> >         > tmpfs           /dev/shm        tmpfs   nodev,nosuid,noexec
>           0 0
> >         > devpts          /dev/pts        devpts  gid=5,mode=620
>          0 0
> >         > sysfs           /sys            sysfs   defaults
>          0 0
> >
> >         you do not need it to acess from linux nor doe sit appear in
> fstab or df output
> >         that is why it is called RAW disk, it is unformatted and under
> application control
> >
> >         in the case below (from production) the whole /dev/sdc disk is
> assigend
> >         to ATS and the udev-rule is needed to allow the ATS user write
> access
> >
> >         nobody and nothig but ATS will ever access this drive
> >         _____________________________________
> >
> >         [root@proxy:~]$ df
> >         Dateisystem    Typ  Größe Benutzt Verf. Verw% Eingehängt auf
> >         /dev/sdb1      ext4  5,8G    668M  5,2G   12% /
> >         /dev/sda1      ext4  493M     34M  456M    7% /boot
> >         _____________________________________
> >
> >         [root@proxy:~]$ cat /etc/trafficserver/storage.config
> >         # Storage Configuration file
> >
> >         # /etc/udev/rules.d/50-ats.rules
> >         # Apache Traffic Server owns disk for RAW access
> >         # KERNEL=="sdc", OWNER="ats"
> >
> >         /dev/sdc
> >         _____________________________________
> >
> >         [root@proxy:~]$ ls /dev/ | grep sd
> >         brw-rw---- 1 root disk      8,   0 2013-10-11 19:36 sda
> >         brw-rw---- 1 root disk      8,   1 2013-10-11 19:36 sda1
> >         brw-rw---- 1 root disk      8,  16 2013-10-11 19:36 sdb
> >         brw-rw---- 1 root disk      8,  17 2013-10-11 19:36 sdb1
> >         brw------- 1 ats  root      8,  32 2013-10-19 22:05 sdc
> >
> >
> >
> >
> >
> >
> >
> >
> >     --
> >     ____________________________________________________________
> >     Adam W. Dace <colonelforbin74@gmail.com <mailto:
> colonelforbin74@gmail.com>>
> >
> >     Phone: (815) 355-5848 <tel:%28815%29%20355-5848>
> >     Instant Messenger: AIM & Yahoo! IM - colonelforbin74 | ICQ -
> #39374451
> >     Microsoft Messenger - colonelforbin74@live.com <mailto:
> adam@turing.com>
> >
> >     Google Profile:
> https://plus.google.com/u/0/109309036874332290399/about
> >
> >
> >
> >
> > --
> > ____________________________________________________________
> > Adam W. Dace <colonelforbin74@gmail.com <mailto:
> colonelforbin74@gmail.com>>
> >
> > Phone: (815) 355-5848
> > Instant Messenger: AIM & Yahoo! IM - colonelforbin74 | ICQ - #39374451
> > Microsoft Messenger - colonelforbin74@live.com <mailto:adam@turing.com>
> >
> > Google Profile: https://plus.google.com/u/0/109309036874332290399/about
>
> --
>
> Reindl Harald
> the lounge interactive design GmbH
> A-1060 Vienna, Hofmühlgasse 17
> CTO / CISO / Software-Development
> m: +43 (676) 40 221 40, p: +43 (1) 595 3999 33
> icq: 154546673, http://www.thelounge.net/
>
> http://www.thelounge.net/signature.asc.what.htm
>
>


-- 
____________________________________________________________
Adam W. Dace <colonelforbin74@gmail.com>

Phone: (815) 355-5848
Instant Messenger: AIM & Yahoo! IM - colonelforbin74 | ICQ - #39374451
Microsoft Messenger - colonelforbin74@live.com <adam@turing.com>

Google Profile: https://plus.google.com/u/0/109309036874332290399/about

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