Administrace komentářů

Dobry den,

prosim zkusenejsi o pomoc s DRBD. Doted jsem ho znal jen z doslechu. Snazim se v rychlosti neco nacist, ale zatim je to malo.

Pokousim se vydolovat data z noveho QNAPu, kteremu po par mesicich odesla zakladni deska. Podle recenzi na internetu to potkalo hodne lidi. Servis v NL nestiha a po nejake dobe vraci penize.

Oba disky jsou vporadku. MD raidy se sestavi a na oddilech, kde je rovnou EXT4 pro system, jsou videt data - konfiguracni soubory, logy, atd. Horsi je to s oddilem pro uzivatelova data. Ta jsou na think provisioned LVM, pod kterym bezi DRDB.

Pokus nahodit DRDB dopadne takto:

# drbdadm up r1
strange bm_offset -2112 (expected: -1928)
No valid meta data found

A ted se ptam:

- Muzu prikazem "drbdadm create-md r1" vytvorit znovu metadata, aniz bych poskodil data na disku?

- Da se pomoci nejakeho offsetu dumpnout disk, abych z DRDB oddilu dostal Physical Extends pro PV?

Nerad bych to resil stylem pokus/omyl, protoze vytvorit pracovni kopii disku trva DDckem 10 hodin.

Dekuji

dl

.

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Puvodni originalni konfiguraky a info ze stroje, kde to zkousim:

# lsmod | grep drb
drbd                  425984  0
lru_cache              16384  1 drbd
libcrc32c              16384  2 btrfs,drbd

# rpm -qa | grep drb
drbd-utils-9.13.0-lp152.2.3.1.x86_64
drbd-9.0.22~1+git.fe2b5983-lp152.2.2.1.x86_64

# blkid -c /dev/null /dev/md126
/dev/md126: UUID="43c1a77e5b530960" TYPE="drbd"

# cat /etc/drbd.d/global_common.conf
global {
        usage-count no;
}
common {
        handlers {
        }
        startup {
        }
        options {
        }
        disk {
        }
        net {
        }
}

# cat /etc/drbd.d/r1.res
resource r1
{
    syncer
    {
        rate 4G;
    }
    on HomeHost
    {
        device /dev/drbd1;
        disk /dev/md126;
        meta-disk internal;
        address 127.0.0.1:7789;
    }
    on FakeHost
    {
        device /dev/drbd1;
        disk /dev/md126;
        meta-disk internal;
        address 1.0.0.1:7789;
    }
}

# drbdadm up r1
strange bm_offset -2112 (expected: -1928)
No valid meta data found

# cat /proc/drbd
version: 8.4.11 (api:1/proto:86-101)
srcversion: B5223DD0E70DC76DE10377F

 1: cs:Unconfigured

LOG z puvodniho NASu:
# grep drb pstore_2_201907101733.log
[   14.619019] drbd: initialized. Version: 8.4.5 (api:1/proto:86-101)
[   14.625194] drbd: GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by @U16BuildServer40, 2019-06-20 06:15:46
[   14.635647] drbd: registered as block device major 147
[   39.414676] drbd r1: Starting worker thread (from drbdsetup-84 [2460])
[   39.421491] block drbd1: disk( Diskless -> Attaching )
[   39.426832] drbd r1: Method to ensure write ordering: flush
[   39.432392] block drbd1: Adjusting my ra_pages to backing device's (32 -> 1024)
[   39.439668] block drbd1: drbd_bm_resize called with capacity == 7794125112
[   39.446521] drbd_realloc_pages use the Default memory
[   39.451747] block drbd1: resync bitmap: bits=7611451 words=118929 pages=233
[   39.458682] block drbd1: size = 3717 GB (3897062556 KB)
[   39.483867] block drbd1: recounting of set bits took additional 0 jiffies
[   39.490650] block drbd1: 3717 GB (7611451 bits) marked out-of-sync by on disk bit-map.
[   39.498546] block drbd1: Suspended AL updates
[   39.502897] block drbd1: disk( Attaching -> UpToDate )
[   39.508111] block drbd1: attached to UUIDs 9EBFAD153C603FE5:0000000000000004:0000000000000000:0000000000000000
[   39.556553] drbd r1: conn( StandAlone -> Unconnected )
[   39.561792] drbd r1: Starting receiver thread (from drbd_w_r1 [2461])
[   39.568374] drbd r1: receiver (re)started
[   39.572393] drbd r1: conn( Unconnected -> WFConnection )
[   40.603095] drbd r1: conn( WFConnection -> Disconnecting )
[   40.603103] drbd r1: Discarding network configuration.
[   40.613849] drbd r1: Connection closed
[   40.617616] drbd r1: conn( Disconnecting -> StandAlone )
[   40.622996] drbd r1: receiver terminated
[   40.626915] drbd r1: Terminating drbd_r_r1
[   40.634108] block drbd1: role( Secondary -> Primary )
[851456.448823] block drbd1: role( Primary -> Secondary )
[851456.454085] block drbd1: bitmap WRITE of 0 pages took 0 jiffies
[851456.460100] block drbd1: 3717 GB (7611451 bits) marked out-of-sync by on disk bit-map.
[851456.501104] block drbd1: disk( UpToDate -> Failed )
[851456.506178] block drbd1: bitmap WRITE of 0 pages took 0 jiffies
[851456.512172] block drbd1: 3717 GB (7611451 bits) marked out-of-sync by on disk bit-map.
[851456.520147] block drbd1: disk( Failed -> Diskless )
[851456.525389] block drbd1: drbd_bm_resize called with capacity == 0
[851456.531594] drbd r1: Terminating drbd_w_r1