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ÀÛ¼ºÀÏ : 10-06-24 18:49
DRBD(Distributed Replicated Block Device) ¼³Ä¡ ¹× ¼³Á¤
 ±Û¾´ÀÌ : ½ÑÀ¥È£½ºÆÃ
Á¶È¸ : 26,924  
   drbd-8.3.4.tar.gz (416.5K) [2] DATE : 2010-06-25 16:33:51
±âº»È¯°æ : - ¸®´ª½º ¼­¹ö 2´ë (CentOS release 5.4 / 2.6.18-164.11.1.el5xen  x86_64)


¾Æ·¡¿Í °°ÀÌ RedHat °è¿­¿¡¼­´Â CentOS ÆÄÀÏÀ» ÀÌ¿ëÇ϶ó°í ÇßÁö¸¸... Fedora Core8_386 ¹öÀü¿¡¼­´Â ¸ÕÁö¸ð¸£´Âµ¥ ÀÚ²Ù ¿¡·¯°¡ ¶á´Ù.
±×³É ±ò²ûÈ÷ CentOS ·Î ¹Ð°í ¼³Á¤À» Àâ¾Ò´Ù.

RedHat

RedHat does not provide DRBD? packages for RHEL although such are available in the ¡æ CentOS extras repository. Since CentOS is a binary compatible clone of RedHat, you can use the CentOS packages on RedHat as well.

1. RPM ¼³Ä¡
Centos ¿¡¼­´Â yum ÀÌ Áö¿øÀ» ÇÑ´Ù.
http://mirror.centos.org/centos/5/extras/x86_64/RPMS/

[root@localhost drbd]# yum install *-drbd83*

[root@localhost drbd]# rpm -qa |grep drbd
kmod-drbd83-8.3.2-6.el5_3
drbd83-8.3.2-6.el5_3
kmod-drbd83-xen-8.3.2-6.el5_3


2. ȯ°æ¼³Á¤ (/etc/drbd.conf)
 - ¼³Á¤ÆÄÀÏÀº /etc/drbd.conf ÀÌ¸ç ±âº»ÆÄÀÏ¿¡ ¾Æ·¡ ³»¿ëÀ» Ãß°¡ÇØÁÖ¸é µÈ´Ù.
 - /dev/hda5  ¿Í /dev/sda9 ÆÄƼ¼ÇÀ» µ¿±âÈ­ ½Ãų°ÍÀÌ´Ù.

# please have a a look at the example configuration file in
# /usr/share/doc/drbd83/drbd.conf
#
global { usage-count yes; }
common { syncer { rate 10M; } }
resource r0 {
        protocol C;
        disk { on-io-error detach; }
        syncer {
        }

        on node1 {                                     # Master ¼­¹ö
                device /dev/drbd0;
                disk /dev/hda5;                      
                address 218.236.115.225:7791;
                meta-disk internal;
                }

        on node2 {                                      # Secondary ¼­¹ö
                device /dev/drbd0;
                disk /dev/sda9;
                address 218.236.115.226:7791;
                meta-disk internal;
                }
        }


 - Hostname º¯°æ

[root@node1 ~]# cat /etc/hosts

218.236.115.225         node1
218.236.115.226         node2


- Meta Data ¸¦ »ý¼ºÇÑ´Ù. (Master /  Secondary ¼­¹ö µÎ´ë¿¡¼­ ¸ðµÎÁøÇà)

Meta Data ???
µ¥ÀÌÅÍ¿¡ °üÇÑ ±¸Á¶È­µÈ µ¥ÀÌÅÍ·Î, ´Ù¸¥ µ¥ÀÌÅ͸¦ ¼³¸íÇØ ÁÖ´Â µ¥ÀÌÅÍ·Î ¼Ó¼ºÁ¤º¸¶ó°íµµ ÇÑ´Ù.
´ë·®ÀÇ Á¤º¸ °¡¿îµ¥¿¡¼­ ã°í ÀÖ´Â Á¤º¸¸¦ È¿À²ÀûÀ¸·Î ã¾Æ³»¼­ ÀÌ¿ëÇϱâ À§ÇØ ÀÏÁ¤ÇÑ ±ÔÄ¢¿¡ µû¶ó ÄÜÅÙÃ÷¿¡ ´ëÇÏ¿© ºÎ¿©µÇ´Â µ¥ÀÌÅÍÀÌ´Ù. ¿©±â¿¡´Â ÄÜÅÙÃ÷ÀÇ À§Ä¡¿Í ³»¿ë, ÀÛ¼ºÀÚ¿¡ °üÇÑ Á¤º¸, ±Ç¸® Á¶°Ç, ÀÌ¿ë Á¶°Ç, ÀÌ¿ë ³»·Â µîÀÌ ±â·ÏµÇ¾î ÀÖ´Ù. ÄÄÇ»ÅÍ¿¡¼­´Â º¸Åë ¸ÞŸµ¥ÀÌÅ͸¦ µ¥ÀÌÅ͸¦ Ç¥ÇöÇϱâ À§ÇÑ ¸ñÀû°ú µ¥ÀÌÅ͸¦ »¡¸® ã±â À§ÇÑ ¸ñÀûÀ¸·Î »ç¿ëÇÏ°í ÀÖ´Ù. 

ÄÄÇ»ÅÍ¿¡¼­ Á¤º¸ÀÇ À妽º(Index) ±¸½ÇÀ» ÇÑ´Ù. ¿ì¸®°¡ ¸¹ÀÌ »ç¿ëÇÏ´Â µ¥ÀÌŸº£À̽ºµµ ÀÌ·¯ÇÑ ¸ÞŸµ¥ÀÌÅÍ°¡ Àß ±¸¼ºµÇ¾î Àֱ⠶§¹®¿¡ µ¥ÀÌÅ͸¦ »¡¸® ãÀ» ¼ö ÀÖ´Ù.  




À§¿Í°°Àº ¿¡·¯¸Þ½ÃÁö°¡ ¹ß»ýÇÒ°ÍÀÌ´Ù.
ÆÄÀϽýºÅÛÀ» ÀÌ¹Ì »ç¿ëÁßÀÌ¶ó¼­ ¾Æ·¡ ¼¼°¡Áö ¹æ¹ýÁß Çϳª¸¦ ¼±ÅÃÇ϶ó´Â ÀǹÌÀÌ´Ù.
   * use external meta data (recommended)
   * shrink that filesystem first
   * zero out the device (destroy the filesystem)


³ª´Â /dev/hda5 ¿¡ ÀÌ¹Ì ext3 ÆÄÀϽýºÅÛÀÌ ¸¶¿îÆ®µÈ »óÅ·ΠÁ¸ÀçÇؼ­ ³ªÅ¸³ª´Â ¿¡·¯·Î È®ÀÎÇÏ°í
umount ÇÏ°í µð½ºÅ©¸¦ ÃʱâÈ­ ½ÃÄ×´Ù. zero out the device¸¦ Çعö¸°´Ù.

°£´ÜÇÏ°Ô dd ·Î ¹Ð¾î ¹ö¸®°í ´Ù½Ã meta data ¸¦ ¸¸µé¾î º¸ÀÚ. 
¿¹Àü¿¡ ¸¸µé¾ú´ø ÈçÀûÀÌ ÀÖ´Ù¸é overwirte ÇÒ°ÍÀÎÁö ¹°¾î º¸Áö¸¸ óÀ½ ¸¸µç´Ù¸é ¹Ù·Î ¸¸µé¾îÁø´Ù.

[root@node1 ~]# vim /etc/fstab

[root@node1 ~]# umount /dev/hda5

[root@node1 ~]# dd if=/dev/zero of=/dev/hda5 bs=1M count=128
128+0 records in
128+0 records out
134217728 bytes (134 MB) copied, 0.333406 seconds, 403 MB/s

[root@node1 ~]# drbdadm create-md all 
v08 Magic number not found
v07 Magic number not found
v07 Magic number not found
v08 Magic number not found
Writing meta data...
initialising activity log
NOT initialized bitmap
New drbd meta data block sucessfully created.
--== Creating metadata ==--
As with nodes we count the total number of devices mirrored by DRBD at
at http://usage.drbd.org.
The counter works completely anonymous. A random number gets created for
this device, and that randomer number and the devices size will be sent.
http://usage.drbd.org/cgi-bin/insert_usage.pl?nu=2977384434883995994&ru=1067486578812435670&rs=9245214720
Enter ¡¯no¡¯ to opt out, or just press [return] to continue:
success

¡Ø dd ¿É¼Ç
       if=FILE
              read from FILE instead of stdin
              Ç¥ÁØÀԷ´ë½Å ÁöÁ¤ÇÑ ÆÄÀÏ¿¡¼­ ºÒ·¯µéÀδÙ.
       of=FILE
              write to FILE instead of stdout
              Ç¥ÁØÃâ·Â´ë½Å ÁöÁ¤ÇÑ ÆÄÀÏ¿¡ ÀÛ¼ºÇÑ´Ù.
       bs=BYTES
              force ibs=BYTES and obs=BYTES
              ÁöÁ¤ÇÑ »çÀÌÁŭ ÀÐ°í ¾´´Ù.
       count=BLOCKS
              copy only BLOCKS input blocks
              ÁöÁ¤ÇÑ ºí·ÏÀÇ ibs Å©±â¸¸Å­ º¹»çÇÑ´Ù.



3. µ¥¸ó ½ÃÀÛ (µÎ´ë ¸ðµÎ¿¡ µ¥¸óÀ» ¿Ã¸°´Ù)

[root@node1 ~]# /etc/init.d/drbd start
Starting DRBD resources: [ d(r0) s(r0) n(r0) ].

[root@node2 ~]# /etc/init.d/drbd start
Starting DRBD resources: [ d(r0) s(r0) n(r0) ].


4. µð½ºÅ© SYNC
ÇöÀç´Â µÎ ¼­¹ö ¸ðµÎ µ¥ÀÌŸ°¡ ¾øÁö¸¸ µ¿±âÈ­ÀÛ¾÷Àº ¸¶½ºÅÍ¿Í º¸Á¶¼­¹ö¸¦ ´Ù½ÃÇѹø È®ÀÎÇÏ°í ÀÛ¾÷À» ÇؾߵȴÙ..
¸ÕÀú ¾çÂÊ ³ëµå°£ÀÇ HDDÀÇ ¸ÞŸÁ¤º¸¸¦ °¡Áö°í µð½ºÅ© SYNC ÀÛ¾÷À» ÇØÁØ´Ù.
 /proc/drbd ¿¡¼­ »ìÆì º¼¼ö ÀÖÀ¸¸ç, ³ª´Â node1 ¼­¹ö´Â ¸¶½ºÅÍ·Î µÎ°í node2¸¦ ¹é¾÷¼­¹ö·Î ¼³Á¤ÇÒ°ÍÀÌ´Ù.
¾çÂʵð½ºÅ©¿¡ ¾ÅÅ©¸¦ ¸ÂÃß´Â ÀÛ¾÷ÀÌ ÁøÇàµÇ´Â°Ô È®ÀÎÀÌ µÉ°ÍÀÌ°í ½Ã°£ÀÌ Á¶±Ý °É¸°´Ù.

[root@node1 ~]# drbdadm -- --overwrite-data-of-peer primary all




5. È®ÀΠ
ÇØ´çÀåÄ¡¸¦ ¿øÇÏ´Â °÷À¸·Î ¸¶¿îÆ®¸¦ °É°í ¹Ì·¯¸µÀÌ ÀߵǰíÀÖ´ÂÁö È®ÀÎÀ» Çغ¸ÀÚ... ¿ë·®ÀÌ Á» Å«°É·Î.....

[root@node1 ~]# mkfs -t ext3 -j /dev/drbd0

[root@node1 ~]# mount /dev/drbd0 /test

[root@node1 test]# du -sh *
861M    TestFile
0       aaa
0       bbb
0       ccc
16K     lost+found

[root@localhost /]# umount /test/
[root@localhost /]# drbdsetup /dev/drbd0 secondary

[root@node2 home]# drbdsetup /dev/drbd0 primary
[root@node2 home]# mount /dev/drbd0 /home/
[root@node2 home]# du -sh *
861M    TestFile
0       aaa
0       bbb
0       ccc
16K     lost+found

1±â°¡°¡·® µÇ´Â µ¥ÀÌŸ°¡ ¼ø°£ µ¿±âÈ­µÇ¾îÀÖ´Ù.
µ¥ÀÌŸ µ¿±âÈ­ °úÁ¤Àº /proc/drbd ¸¦ ÅëÇؼ­ ¸ð´ÏÅ͸µÇÏ½Ã¸é µË´Ï´Ù.
¾Æ·¡´Â 800¸Þ°¡ µ¥ÀÌŸ¸¦ ¾÷·Îµå Çϸ鼭 ĸÃĶá°Å ÀÔ´Ï´Ù.




 



 
 

Total 78
¹øÈ£ Á¦   ¸ñ ±Û¾´ÀÌ ³¯Â¥ Á¶È¸
3 DRBD(Distributed Replicated Block Device) ¼³Ä¡ ¹× ¼³Á¤ ½ÑÀ¥È£½ºÆà 06-24 26925
2 SSH ±âº»¸í·É¾î ÃÖ°í°ü¸®ÀÚ 06-22 39847
1 ¾ËFTP »ç¿ë¹ý ÃÖ°í°ü¸®ÀÚ 06-22 22346
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