관리용 유틸리티

🔸 drbdadm

DRBD의 제어에 필요한 모든 파라미터를 /etc/drbd.conf 에서 읽고, drbdsetup 및 drbdmeta의 프론트 앤드로써 동작.

🔸 drbdsetup

커널에 로드 된 DRBD 모듈을 설정

🔸 drbdmeta

DRBD 메타 데이터의 작성이나 변경, 덤프, 리스토어 등을 참조

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1. drbdadm

# drbdadm -d adjust <resource name>

현재 관리가 필요한 내용의 세부 명령어를 보여줌
-d 옵션을 통해 실행하지 않고 명령어만 나열.

예시) DRBD를 시작하기 위해 필요한 하위 명령어 

[root@hostname ~]# drbdadm -d adjust r0
drbdsetup new-resource r0 0
drbdsetup new-minor r0 0 0
drbdsetup new-peer r0 1 --_name=centos1 --protocol=C
drbdsetup new-path r0 1 ipv4:192.168.1.101:7789 ipv4:192.168.1.102:7789
drbdmeta 0 v09 /dev/sdb internal apply-al
drbdsetup attach 0 /dev/sdb /dev/sdb internal
drbdsetup connect r0 1

# drbdadm up {all | <resource name>}

DRBD를 처음 시작할 때 사용하는 명령어로 attach와 connect를 동시 실행

# drbdadm down {all | <resource name>}

DRBD를 종료 할 때 사용하는 명령어로 detach와 disconnect를 동시 실행

# drbdadm status {all | <resource name>}

DRBD의 현재 상태를 볼 때 사용

출처 - Freepik

2. drbdsetup

# drbdsetup new-resource <resource name> <volume number>

새로운 리소스 생성

예시)

[root@hostname ~]# drbdsetup new-resource r0 0
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1559	1522	0	10:10	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary

# drbdsetup new-minor <resource name> <minor number> <volume number>

새로운 가상 블록 장치 생성

예시)

[root@hostname ~]# drbdsetup new-minor r0 0 0
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1559	1522	0	10:10	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:Diskless

# drbdsetup new-peer <resource name> <node_id> <net_option>

리소스내에서 연결을 만든다. 그러기 위해서는 new-resource가 선행되어야 한다.

예시)

[root@hostname ~]# drbdsetup new-peer r0 1 --_name=centos1 --protocol=C
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1588		2	0	10:14	?		00:00:00 [drbd_s_r0]
root 	1583	1522	0	10:14	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:Diskless
  centos1 connection:StandAlone

# drbdsetup new-path <resource name> <node_id> <local_IP> <remote_IP>

연결 경로를 만든다. 그러기 위해서는 new-peer가 선행되어야 한다.

예시)

[root@hostname ~]# drbdsetup new-path r0 1 ipv4:192.168.1.101:7789 ipv4:192.168.1.102:7789
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1588		2	0	10:14	?		00:00:00 [drbd_s_r0]
root 	1598	1522	0	10:17	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:Diskless
  centos1 connection:StandAlone

# drbdsetup attach <minor number> <lower_dev> <meta_data_dev> <md 저장위치>

리소스 디바이스의 블록 디바이스 연결

예시)

[root@hostname ~]# drbdsetup attach 0 /dev/sdb /dev/sdb internal
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1588		2	0	10:14	?		00:00:00 [drbd_s_r0]
root 	1625	1522	0	10:59	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:UpToDate
  centos1 connection:StandAlone
[root@hostname ~]# lsblk
NAME          MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda             8:0    0   16G  0 disk
├─sda1          8:1    0    1G  0 part /boot
└─sda2          8:2    0   15G  0 part
  ├─rhel-root 253:0    0 13.4G  0 lvm  /
  └─rhel-swap 253:1    0  1.6G  0 lvm  [SWAP]
sdb             8:16   0   12T  0 disk
└─drbd0       147:0    0  4.7T  0 disk
sr0            11:0    1  4.2G  0 rom

# drbdsetup connect <resource name> <node_id>

리소스에 대응하는 네트워크 설정 유효화

예시)

[root@hostname ~]# drbdsetup connect r0 1
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1588		2	0	10:14	?		00:00:00 [drbd_s_r0]
root 	1642		2	0	11:01	?		00:00:00 [drbd_r_r0]
root 	1643		2	0	11:01	?		00:00:00 [drbd_a_r0]
root 	1644		2	0	11:01	?		00:00:00 [drbd_as_r0]
root 	1648	1522	0	11:01	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:UpToDate
  centos1 role:Secondary
    peer-disk:UpToDate

# drbdsetup status {<resource name>|}

DRBD 상태 간략 보기

예시)

[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:UpToDate
  centos1 role:Secondary
    peer-disk:UpToDate

# drbdsetup status {<resource name>|} --v --s

DRBD 상태 상세 보기

예시)

[root@hostname ~]# drbdsetup status --v --s
r0 node-id:0 role:Secondary suspended:no
    write-ordering:flush
  volume:0 minor:0 disk:UpToDate backing_dev:/dev/sdb quorum:yes
      size:5078124544 read:31916 written:4208 al-writes:1 bm-writes:2 upper-pending:0 lower-pending:0 al-suspended:no blocked:no
  192.168.1.102:7789 node-id:1 connection:Connected role:Secondary congested:no ap-in-flight:0 rs-in-flight:0
    volume:0 replication:Established peer-disk:UpToDate resync-suspended:no
        received:48 sent:4156 out-of-sync:0 pending:0 unacked:0

# drbdsetup events2 {<resource name>|}

DRBD 실시간 상태 상세 보기

예시)

[root@hostname ~]# drbdsetup events2
exists peer-device name:r1 peer-node-id:1 conn-name:192.168.1.102:7790 volume:0 replication:Established peer-disk:UpToDate peer-client:no resync-suspended:no
exists path name:r1 peer-node-id:1 conn-name:192.168.1.102:7790 local:ipv4:192.168.1.101:7790 peer:ipv4:192.168.1.102:7790 established:yes
exists -

출처 - Vecteezy

2. drbdmeta

# drbdmeta <device> {v06|v07|v08|v09} <command> <cmd args...>

메타 데이터 관리 설정

예시)

[root@hostname ~]# drbdmeta 0 v09 /dev/sdb internal apply-al
[root@hostname ~]# ps -ef | grep drbd
root 	1552		2	0	10:07	?		00:00:00 [drbd-reissue]
root 	1557		2	0	10:09	?		00:00:00 [drbd_w_r0]
root 	1576		2	0	10:13	?		00:00:00 [drbd0_submit]
root 	1588		2	0	10:14	?		00:00:00 [drbd_s_r0]
root 	1615	1522	0	10:56	pts/0	00:00:00 grep --color=auto drbd
[root@hostname ~]# drbdadm status
r0  role:Secondary
  disk:Diskless
  centos1 connection:StandAlone