[DRBD-user] Server not promoted to primary

[Timothy Moyer]

We ran into a scenario the other day were during normal maintenance both
servers were shut down upon restart the A server would not boot. This server
had been the active primary and the problem was the B server would not
promote the primary remaining in the state of "UpToDate". Subsequently we
were able to start the A server and it came on primary.

We were able to run some tests and found that if the first server shutdown
is not primary it cannot come back as primary without the other.

 

Is there some configuration parameter I can set to allow this? Or some
command that can be given to force the server to primary.

 

We are running R ed Hat 6.7 with DRBD 8.3.16-1.

 

This is the resource configuration

Global_common

 

global {

        usage-count yes;

        # minor-count dialog-refresh disable-ip-verification

}

 

common {

        protocol C;

 

        handlers {

                # These are EXAMPLE handlers only.

                # They may have severe implications,

                # like hard resetting the node under certain circumstances.

                # Be careful when chosing your poison.

 

                # pri-on-incon-degr
"/usr/lib/drbd/notify-pri-on-incon-degr.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";

                # pri-lost-after-sb
"/usr/lib/drbd/notify-pri-lost-after-sb.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";

                # local-io-error "/usr/lib/drbd/notify-io-error.sh;
/usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ;
halt -f";

                # fence-peer "/usr/lib/drbd/crm-fence-peer.sh";

                # split-brain "/usr/lib/drbd/notify-split-brain.sh root";

                # out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";

                # before-resync-target
"/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";

                # after-resync-target
/usr/lib/drbd/unsnapshot-resync-target-lvm.sh;

        }

 

        startup {

                # wfc-timeout degr-wfc-timeout outdated-wfc-timeout
wait-after-sb

        }

 

        disk {

                # on-io-error fencing use-bmbv no-disk-barrier
no-disk-flushes

                # no-disk-drain no-md-flushes max-bio-bvecs

        }

 

        net {

                # sndbuf-size rcvbuf-size timeout connect-int ping-int
ping-timeout max-buffers

                # max-epoch-size ko-count allow-two-primaries cram-hmac-alg
shared-secret

                # after-sb-0pri after-sb-1pri after-sb-2pri
data-integrity-alg no-tcp-cork

        }

 

        syncer {

                # rate after al-extents use-rle cpu-mask verify-alg
csums-alg

        }

}

 

Oriondisk

 

resource oriondisk {

        protocol        C;

 

        startup {

                wfc-timeout     20;

                degr-wfc-timeout        20;

                become-primary-on both;

        }

 

        net {

                max-epoch-size  8000;

                max-buffers     8000;

                sndbuf-size     512K;

                allow-two-primaries;

                after-sb-0pri   discard-zero-changes;

                after-sb-1pri   discard-secondary;

        }

 

        syncer {

                rate    80M;

        }

disk{

            fencing resource-only;

        }

 

    handlers {

    pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";

    pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";

    local-io-error "/usr/lib/drbd/notify-io-error.sh;
/usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ;
halt -f";

    out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";

    split-brain "/usr/lib/drbd/notify-split-brain.sh root";

  }

 

        on acf81a.orionsystems.net {

                device          /dev/drbd1;

                disk            /dev/sdb1;

                flexible-meta-disk      internal;

                address         10.2.81.101:7789;

        }

        on acf81b.orionsystems.net {

                device          /dev/drbd1;

                disk            /dev/sdb1;

                flexible-meta-disk      internal;

                address         10.2.81.102:7789;

        }

}

----------------------------------------------------------------------------
-------------------------------------------------
Timothy F Moyer
Orion Systems Inc.

352.410.1639



 



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