[DRBD-user] GFS primary/primary howto

Anuj Singh anujhere at gmail.com
Wed Jun 20 16:36:39 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On 6/20/07, Mike Tewner <tewner at gmail.com> wrote:
> Do pr0005.prolo.com  and pr0009.prolo.com <http://pr0005.prolo.com/>
> resolve on both machines?
Yes entries of both machines is in /etc/hosts file, and resolving
> did you so a sync?
I used this command from pr009
drbdadm -- --overwrite-data-of-peer primary all


> Do you have a rule in the drbd.conf telling drbd what do in case of a
> splitbrain?
no it is not.
my drbd.conf file is
global { usage-count yes; }
       common { syncer { rate 10M; } }
       resource r0 {
            protocol C;
        startup { wfc-timeout 12; degr-wfc-timeout 120; }
            net {
                 cram-hmac-alg sha1;
                 shared-secret "prolog";
                 allow-two-primaries;

            }
            on pr009.prolo.com {
                 device    /dev/drbd1;
                 disk      /dev/hdb10;
                 address   192.168.10.38:7789;
                 meta-disk  internal;
            }
            on pr0005.prolo.com {
                 device    /dev/drbd1;
                 disk      /dev/hda6;
                 address   192.168.10.31:7789;
                 meta-disk  internal;
            }

how do i synchronize both primary/primary nodes?

i found that if i unmount and remount  after a while i can see pr009
machine updated.
How to define sync timing?
What about  /etc/ha.d/resource.d/drbddisk script
i started it with
/etc/ha.d/resource.d/drbddisk r0 start

thanks and regards
anugunj "anuj singh"
>
>
> On 6/20/07, Anuj Singh <anujhere at gmail.com> wrote:
> >
> > On 6/20/07, Mike Tewner <tewner at gmail.com> wrote:
> > > you can start by setting
> > > allow-two-primaries;
> > > in your drbd.conf file, under net{}
> > >
> > > On 6/20/07, Anuj Singh <anujhere at gmail.com> wrote:
> > > >
> > > > hi,
> > > > I am using drbd-8.0.3 version on redhat enterprise 4 linux.
> > > > my /etc/drdb.conf is
> > > > global { usage-count yes; }
> > > >        common { syncer { rate 10M; } }
> > > >        resource r0 {
> > > >             protocol C;
> > > >             net {
> > > >                  cram-hmac-alg sha1;
> > > >                  shared-secret "prolog";
> > > >             }
> > > >             on pr009.prolo.com {
> > > >                  device    /dev/drbd1;
> > > >                  disk      /dev/hdb10;
> > > >                  address   192.168.10.38:7789;
> > > >                  meta-disk  internal;
> > > >             }
> > > >             on pr0005.prolo.com {
> > > >                  device    /dev/drbd1;
> > > >                  disk      /dev/hda6;
> > > >                  address   192.168.10.31:7789;
> > > >                  meta-disk  internal;
> > > >             }
> > > >        }
> > > >
> > > > while making primary both the nodes, second node gives me this error
> > > >         act_log: used:0/127 hits:0 misses:0 starving:0 dirty:0
> > changed:0
> > > > [root at pr009 scripts]# drbdadm primary r0
> > > > State change failed: (-1) Multiple primaries not allowed by config
> > > > Command 'drbdsetup /dev/drbd1 primary' terminated with exit code 11
> > > > how to make both nodes primary/primary simultaneously? in drbdsetup
> > > > man pages there is one option with -m . but i am unable to use it.
> > > >
> > > > target is to mount gfs on both nodes for cluster HA.
> > > > drbdsetup /dev/drbd1 primary -o
> > > > State change failed: (-1) Multiple primaries not allowed by config
> > > > Using -m option
> > Thank you Mike,
> > it is working, I mounted both patritions, able to write on both,
> > unmonted again and restarting service gave me splitbrain error.
> > most probably some other mistake i made, going threw
> > http://lists.linbit.com/pipermail/drbd-user/2007-June/006950.html
> > it is not continuously updating, my drbd.conf
> > global { usage-count yes; }
> >        common { syncer { rate 10M; } }
> >        resource r0 {
> >             protocol C;
> >         startup { wfc-timeout 12; degr-wfc-timeout 120; }
> >             net {
> >                  cram-hmac-alg sha1;
> >                  shared-secret "prolog";
> >                  allow-two-primaries;
> >
> >             }
> >             on pr009.prolo.com {
> >                  device    /dev/drbd1;
> >                  disk      /dev/hdb10;
> >                  address   192.168.10.38:7789;
> >                  meta-disk  internal;
> >             }
> >             on pr0005.prolo.com {
> >                  device    /dev/drbd1;
> >                  disk      /dev/hda6;
> >                  address   192.168.10.31:7789;
> >                  meta-disk  internal;
> >             }
> >        }
> >
> > cat /proc/drbd on pr0005 (192.168.10.31)
> > cs:StandAlone st:Primary/Unknown ds:UpToDate/DUnknown   r---
> >     ns:0 nr:0 dw:272 dr:269 al:0 bm:4 lo:0 pe:0 ua:0 ap:0
> >         resync: used:0/31 hits:18 misses:4 starving:0 dirty:0 changed:4
> >         act_log: used:0/127 hits:25 misses:0 starving:0 dirty:0 changed:0
> >
> > and cat /proc/drbd on pr009 (192.168.10.38)is
> >
> > 1: cs:WFConnection st:Primary/Unknown ds:UpToDate/DUnknown C r---
> >     ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0
> >         resync: used:0/31 hits:0 misses:0 starving:0 dirty:0 changed:0
> >         act_log: used:0/127 hits:0 misses:0 starving:0 dirty:0 changed:0
> >
> > what am i missing in this configuration, I tried to restart sevice and
> > check if it is updating data if one node restarts.
> >
> > Thanks and regards
> > anugunj "anuj singh"
> >
> >
> > > > drbdsetup /dev/drbd1 primary  -m
> > > > drbdsetup: unrecognized option '-m'
> > > >
> > > > how to make it primary primary ,
> > > >
> > > > thanks and regards
> > > > anugunj "anuj singh"
> > > > _______________________________________________
> > > > drbd-user mailing list
> > > > drbd-user at lists.linbit.com
> > > > http://lists.linbit.com/mailman/listinfo/drbd-user
> > > >
> > >
> >
>



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