configuració drbd9 en debian8

basat en el següent article

https://www.globo.tech/learning-center/setup-drbd-9-ubuntu-16/

CONDICIÓ D'INICI
2 maquines debian8
1 disc /dev/sdb1 secundari per montar el drbd

afegir als dos servidors el reconeixement per nom

root@drbd1:~# more /etc/hosts
127.0.0.1       localhost
# 127.0.1.1      drbd1.ies-sabadell.cat  drbd1
192.168.0.180   drbd0.ies.cat  drbd0
192.168.0.181   drbd1.ies.cat  drbd1

INSTAL·LAR

apt-get update
sudo apt-get install -y drbd8-utils

ACONSEGUIR LA SINCRONITZACIÓ DE TEMPS

apt-get install -y ntp

creació d'una partició del mateix tamany a les dos màquines 

fdisk /dev/sdb

n   nova partició

p primaria

w write canvis

dd if=/dev/zero of=/dev/sdb1

als dos servidors també creem el recurs r0 associat a la partició creada i tot al fitxer /etc/drbd.conf

root@drbd1:~# more /etc/drbd.conf

# You can find an example in  /usr/share/doc/drbd.../drbd.conf.example

# include "drbd.d/global_common.conf";

# include "drbd.d/*.res";

global { usage-count no; }

common { protocol C; }

resource r0 {

on drbd1 {

device /dev/drbd0;

disk /dev/sdb1;

address 192.168.0.181:7788;

meta-disk internal;

}

on drbd0 {

device /dev/drbd0;

disk /dev/sdb1;

address 192.168.0.180:7788;

meta-disk internal;

}

}

carregar el modul 

modprobe drbd

crear el dispositiu mirror

drbdadm create-md r0

Then simply bring the mirror device online with this command.

drbdadm up r0

Per veure l'estat del drbd

drbd-overview cat /etc/drbd

els dos nodes son inicialment secundaris o pasius. Forçar un d'ells a ser primary

drbdadm -- --overwrite-data-of-peer primary r0/0

Finalment formatejar i montar la unitat de disc

sudo mkfs.ext4 /dev/drbd0
sudo mkdir -p /var/www/html
sudo mount /dev/drbd0 /var/www/html

In order to upgrade, do the following:

apt install software-properties-common

then

sudo add-apt-repository ppa:linbit/linbit-drbd9-stack

Finally, perform apt-get update so that Debian will recognize the updated repository. After that, you can run the apt-get upgrade to upgrade DRBD to version 9.

apt-get update
apt-get upgrade

No he aconseguir passar a la versió 9, no em troba drbd per la debian

aquest és l'error

W: No s'ha pogut obtenir http://ppa.launchpad.net/linbit/linbit-drbd9-stack/ubuntu/dists/jessie/main/binary-amd64/Packages  404  Not Found

root@drbd1:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----

    ns:0 nr:851152 dw:34403500 dr:0 al:0 bm:286 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

SI PARO ARA drbd0

root@drbd1:~# drbd-overview cat /etc/drbd

 0:r0/0  WFConnection Secondary/Unknown UpToDate/DUnknown

root@drbd1:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:WFConnection ro:Secondary/Unknown ds:UpToDate/DUnknown C r-----

    ns:0 nr:851152 dw:34403500 dr:0 al:0 bm:286 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

SI TORNO A ENCENDRE drbd0

els dos en secundary fins que sincronitzi

root@drbd1:~# drbd-overview cat /etc/drbd

 0:r0/0  SyncTarget Secondary/Secondary Inconsistent/UpToDate

        [>....................] sync'ed:  0.1% (4944/4944)Mfinish: 0:52:44 speed: 1,260 (1,260) want: 1,360 K/sec

root@drbd1:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:SyncTarget ro:Secondary/Secondary ds:Inconsistent/UpToDate C r-----

    ns:0 nr:857404 dw:34409752 dr:0 al:0 bm:286 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:5058416

        [>....................] sync'ed:  0.3% (4936/4944)Mfinish: 0:39:31 speed: 2,084 (2,084) want: 3,040 K/sec

root@drbd1:~#

continua

root@drbd1:~# drbd-overview cat /etc/drbd

 0:r0/0  SyncTarget Secondary/Secondary Inconsistent/UpToDate

        [============>.......] sync'ed: 65.9% (1688/4944)Mfinish: 0:00:49 speed: 34,856 (25,460) want: 36,920 K/sec

root@drbd1:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:SyncTarget ro:Secondary/Secondary ds:Inconsistent/UpToDate C r-----

    ns:0 nr:4262360 dw:37814708 dr:0 al:0 bm:511 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:1653460

        [============>.......] sync'ed: 67.5% (1612/4944)Mfinish: 0:00:46 speed: 35,064 (25,648) want: 38,520 K/sec

se disparó consumo de red y uso de disco

root@drbd1:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r-----

    ns:0 nr:5915820 dw:39468168 dr:0 al:0 bm:613 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

root@drbd1:~# drbd-overview cat /etc/drbd

 0:r0/0  Connected Secondary/Secondary UpToDate/UpToDate

MISSATGES DEL SYSLOG

May 22 00:14:48 drbd1 kernel: [83618.112489] block drbd0: helper command: /sbin/drbdadm before-resync-target minor-0

May 22 00:14:48 drbd1 kernel: [83618.113577] block drbd0: helper command: /sbin/drbdadm before-resync-target minor-0 exit code 0 (0x0)

May 22 00:14:48 drbd1 kernel: [83618.113586] block drbd0: conn( WFSyncUUID -> SyncTarget ) disk( Outdated -> Inconsistent )

May 22 00:14:48 drbd1 kernel: [83618.113591] block drbd0: Began resync as SyncTarget (will sync 5064668 KB [1266167 bits set]).

May 22 00:17:01 drbd1 CRON[2464]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)

May 22 00:17:49 drbd1 kernel: [83800.029781] block drbd0: Resync done (total 181 sec; paused 0 sec; 27980 K/sec)

May 22 00:17:49 drbd1 kernel: [83800.029787] block drbd0: updated UUIDs 716CEB055F69D08C:0000000000000000:82078DA323F1657E:82068DA323F1657F

May 22 00:17:49 drbd1 kernel: [83800.029792] block drbd0: conn( SyncTarget -> Connected ) disk( Inconsistent -> UpToDate )

May 22 00:17:49 drbd1 kernel: [83800.030037] block drbd0: helper command: /sbin/drbdadm after-resync-target minor-0

May 22 00:17:49 drbd1 kernel: [83800.031152] block drbd0: helper command: /sbin/drbdadm after-resync-target minor-0 exit code 0 (0x0)

FINALMENT HE TINGUT QUE FER

root@drbd0:~# mount /dev/drbd0 /var/www/html

mount: /dev/drbd0 is write-protected, mounting read-only

mount: mount /dev/drbd0 on /var/www/html failed: El tipus de mitjà  no és và lid

root@drbd0:~# drbdadm -- --overwrite-data-of-peer primary r0

POSAR DRBD0 COM A PRIMARY

root@drbd0:~# cat /proc/drbd

version: 8.4.3 (api:1/proto:86-101)

srcversion: 1A9F77B1CA5FF92235C2213

 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----

    ns:5064668 nr:0 dw:0 dr:5066084 al:0 bm:327 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

root@drbd0:~# mount /dev/drbd0 /var/www/html

ja ho puc montar , miro en drbd1

root@drbd1:/var# mount /dev/drbd0 /var/www/html

mount: /dev/drbd0 is write-protected, mounting read-only

mount: mount /dev/drbd0 on /var/www/html failed: El tipus de mitjà  no és và lid

com es secondary, només de lectura.

EL SEGÜENT ARTICLE SERÀ , sobre el drbd montarem una ip flotant amb heartbeat

https://www.globo.tech/learning-center/high-availability-heartbeat-drbd-ubuntu-16/