[DRBD-user] drbd and secondary while primary down

[Tim Hibbard]

1) Shutdown LEO1

2) LEO2: rm -Rf /mount/of/drdb3/somedir
    /proc/drbd
    3: cs:WFConnection st:Primary/Unknown ld:Consistent
        ns:1344 nr:227872 dw:242412 dr:110062 al:16 bm:531 lo:0 pe:0 ua:0 ap:0

3) Start LEO1

4) LEO1: ls -l /mount/of/drbd3/somedir still exists
    /proc/drbd
    3: cs:Connected st:Primary/Secondary ld:Consistent
        ns:82156 nr:0 dw:228 dr:88645 al:0 bm:37 lo:0 pe:0 ua:0 ap:0


Here are my syslog entries:
drbd3: resync bitmap: bits=101636592 words=3176144
drbd3: size = 387 GB (406546368 KB)
drbd3: 0 KB marked out-of-sync by on disk bit-map.
drbd3: Found 6 transactions (22 active extents) in activity log.
drbd3: Marked additional 10 MB as out-of-sync based on AL.
drbd3: drbdsetup [2449]: cstate Unconfigured --> StandAlone
drbd3: drbdsetup [2476]: cstate StandAlone --> Unconnected
drbd3: drbd3_receiver [2477]: cstate Unconnected --> WFConnection
drbd3: Handshake successful: DRBD Network Protocol version 74
drbd3: Connection established.
drbd3: I am(S): 1:00000002:00000002:00000048:00000006:10
drbd3: Peer(S): 1:00000002:00000002:00000046:00000007:00
drbd3: drbd3_receiver [2477]: cstate WFReportParams --> WFBitMapS
drbd3: drbd3_receiver [2477]: cstate WFBitMapS --> SyncSource
drbd3: Resync started as SyncSource (need to sync 82616 KB [20654 bits set]).
drbd3: Resync done (total 1 sec; paused 0 sec; 82616 K/sec)
drbd3: drbd3_worker [2451]: cstate SyncSource --> Connected
drbd3: Secondary/Secondary --> Primary/Secondary





On Monday 18 July 2005 10:11 am, Lars Ellenberg wrote:
> / 2005-07-18 08:50:05 -0400
>
> \ Tim Hibbard:
> > While NodeB is active I deleted a directory on the block device,
> > excepting the change to also reflect when NodeA became available again. 
> > Instead when NodeA comes alive again it seems to sync NodeA to NodeB
> > block.  When heartbeat does its recovery the directory and all it's
> > contents are found on both block devices again.  As a note, while NodeB
> > is primary, /proc/drbd does show Primary/UnKnown and mount shows
> > /dev/drbd3 mounted to /usr/local/leo.
>
> so. first, is it correct that you basically did:
> | leo1# grep "^ 3: cs:" /proc/drbd
> |  3: cs:Connected st:Primary/Secondary ld:Consistent
> |
> | leo1# halt
> |
> | ... automatic failover by heartbeat to leo2 ...
> |
> | leo2# grep "^ 3: cs:" /proc/drbd
> |  3: cs:WFConnettion st:Primary/Unknown ld:Consistent
> |
> | leo2# rm -r /mountpoint/of/drbd3/some/previously/existing/directory
> |
> | ... switch on leo1 again ...
> |
> | leo2# grep "^ 3: cs:" /proc/drbd
> |  3: cs:SyncSource st:Primary/Secondary ld:Consistent
> |
> | ...
> |
> | leo2# grep "^ 3: cs:" /proc/drbd
> |  3: cs:Connected st:Primary/Secondary ld:Consistent
> |
> | leo2# ..../hb_standby
> |
> | ... operator triggered heartbeat failback to leo1 again ...
> |
> | leo1# grep "^ 3: cs:" /proc/drbd
> |  3: cs:Connected st:Primary/Secondary ld:Consistent
> |
> | leo1# ln -l /mountpoint/of/drbd3/some/previously/existing/directory
> |   [ lists contents of supposedly removed directory ]
>
> if that is indeed what has happend, I'd be interessted in the syslog/kernel
> logs, to be able to explain to you why what happened was expected, even
> though you expected otherwise ;-)
>
> especially the lines looking similar to
>
>   kernel: drbd0: drbd0_receiver [5482]: cstate WFConnection -->
> WFReportParams kernel: drbd0: Handshake successful: DRBD Network Protocol
> version 74 kernel: drbd0: Connection established.
>   kernel: drbd0: I am(P): 1:00000002:00000001:00000004:00000001:10
>   kernel: drbd0: Peer(S): 1:00000002:00000001:00000003:00000001:01
>   kernel: drbd0: drbd0_receiver [5482]: cstate WFReportParams --> WFBitMapS
>   kernel: drbd0: Primary/Unknown --> Primary/Secondary
>   kernel: drbd0: drbd0_receiver [5482]: cstate WFBitMapS --> SyncSource
>   kernel: drbd0: Resync started as SyncSource (need to sync 156640 KB
> [39160 bits set]). kernel: drbd0: Resync done (total 7 sec; paused 0 sec;
> 22377 K/sec)
>
> (including hostname and timestamp, obviously)
>
> if you did something else, please specify.
>
> cheers,
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