LVM逻辑卷在线动态扩容

环境：centos6

将需要扩容硬盘插入指定服务器

[root@huidu_hx_127_88 ~]# /opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL
                                     
Adapter #0

Enclosure Device ID: 32
Slot Number: 2
Enclosure position: 1
Device Id: 2
WWN: 5000C50084869FF8
Sequence Number: 1
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 931.512 GB [0x74706db0 Sectors]
Non Coerced Size: 931.012 GB [0x74606db0 Sectors]
Coerced Size: 931.0 GB [0x74600000 Sectors]
Sector Size:  0
Firmware state: Unconfigured(good), Spun Up
Device Firmware Level: AS0B
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x5000c50084869ff9
SAS Address(1): 0x0
Connected Port Number: 2(path0) 
Inquiry Data: SEAGATE ST91000640SS    AS0B9XG9K9R0            
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None 
Device Speed: 6.0Gb/s 
Link Speed: 6.0Gb/s 
Media Type: Hard Disk Device
Drive Temperature :17C (62.60 F)
PI Eligibility:  No 
Drive is formatted for PI information:  No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s 
Port-1 :
Port status: Active
Port's Linkspeed: Unknown 
Drive has flagged a S.M.A.R.T alert : No

Enclosure Device ID: 32
Slot Number: 3
Enclosure position: 1
Device Id: 3
WWN: 5000C50084857234
Sequence Number: 1
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 931.512 GB [0x74706db0 Sectors]
Non Coerced Size: 931.012 GB [0x74606db0 Sectors]
Coerced Size: 931.0 GB [0x74600000 Sectors]
Sector Size:  0
Firmware state: Unconfigured(good), Spun Up
Device Firmware Level: AS0B
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x5000c50084857235
SAS Address(1): 0x0
Connected Port Number: 3(path0) 
Inquiry Data: SEAGATE ST91000640SS    AS0B9XG9KD2Q            
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None 
Device Speed: 6.0Gb/s 
Link Speed: 6.0Gb/s 
Media Type: Hard Disk Device
Drive Temperature :18C (64.40 F)
PI Eligibility:  No 
Drive is formatted for PI information:  No
PI: No PI
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s 
Port-1 :
Port status: Active
Port's Linkspeed: Unknown 
Drive has flagged a S.M.A.R.T alert : No

确认JBOD模式为禁用状态

[root@huidu_hx_127_88 ~]# /opt/MegaRAID/MegaCli/MegaCli64 -AdpGetProp -enablejbod -aALL
                                     
Adapter 0: JBOD: Disabled
Exit Code: 0x00

创建raid1

[root@huidu_hx_127_88 ~]# /opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r1 [32:2,32:3] WB Direct -a0
                                     
Adapter 0: Created VD 1
Adapter 0: Configured the Adapter!!
Exit Code: 0x00

[root@huidu_hx_127_88 ~]# ll /dev/sd
sda   sda1  sda2  sdb

查看raid状态

[root@huidu_hx_127_88 ~]# /opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -LALL -aAll
                                     
Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name                :
RAID Level          : Primary-1, Secondary-0, RAID Level Qualifier-0
Size                : 185.75 GB
Sector Size         : 512
Mirror Data         : 185.75 GB
State               : Optimal
Strip Size          : 64 KB
Number Of Drives    : 2
Span Depth          : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy   : Disk's Default
Encryption Type     : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: No
LD has drives that support T10 power conditions: No
LD's IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: No

Virtual Drive: 1 (Target Id: 1)
Name                :
RAID Level          : Primary-1, Secondary-0, RAID Level Qualifier-0
Size                : 931.0 GB
Sector Size         : 512
Mirror Data         : 931.0 GB
State               : Optimal
Strip Size          : 64 KB
Number Of Drives    : 2
Span Depth          : 1
Default Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteBack, ReadAdaptive, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy   : Disk's Default
Encryption Type     : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: Yes
LD has drives that support T10 power conditions: Yes
LD's IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: Yes
Cache Cade Type : Read Only
Exit Code: 0x00

[root@huidu_hx_127_88 ~]# ll /dev/sd
sda   sda1  sda2  sdb   

[root@huidu_hx_127_88 ~]# fdisk -l /dev/sdb
Disk /dev/sdb: 999.7 GB, 999653638144 bytes
255 heads, 63 sectors/track, 121534 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

LVM分区

[root@huidu_hx_127_88 ~]# fdisk  /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x7b065bfc.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').
Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-121534, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-121534, default 121534): 
Using default value 121534

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): p
Disk /dev/sdb: 999.7 GB, 999653638144 bytes
255 heads, 63 sectors/track, 121534 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x7b065bfc
   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      121534   976221823+  8e  Linux LVM

Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

创建物理卷（PV）

[root@huidu_hx_127_88 ~]# pvcreate /dev/sdb1 
dev_is_mpath: failed to get device for 8:17 
Physical volume "/dev/sdb1" successfully created 

[root@huidu_hx_127_88 ~]# pvscan 
  PV /dev/sda2   VG vg_root         lvm2 [185.62 GiB / 0    free]
  PV /dev/sdb1                      lvm2 [931.00 GiB]
  Total: 2 [1.09 TiB] / in use: 1 [185.62 GiB] / in no VG: 1 [931.00 GiB]

扩展卷组（VG）

[root@huidu_hx_127_88 ~]# vgextend vg_root /dev/sdb1
  Volume group "vg_root" successfully extended

[root@huidu_hx_127_88 ~]# pvscan 
  PV /dev/sda2   VG vg_root   lvm2 [185.62 GiB / 0    free]
  PV /dev/sdb1   VG vg_root   lvm2 [930.97 GiB / 930.97 GiB free]
  Total: 2 [1.09 TiB] / in use: 2 [1.09 TiB] / in no VG: 0 [0   ]

扩展LV（将新的VG空间划入LV，扩容lv_opt）

[root@huidu_hx_127_88 ~]# lvextend -l +100%FREE /dev/vg_root/lv_opt 
  Extending logical volume lv_opt to 1.03 TiB
  Logical volume lv_opt successfully resized

更新磁盘blocks

[root@huidu_hx_127_88 ~]# resize2fs /dev/vg_root/lv_opt 
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_root/lv_opt is mounted on /opt; on-line resizing required
old desc_blocks = 8, new_desc_blocks = 67
Performing an on-line resize of /dev/vg_root/lv_opt to 277504000 (4k) blocks.
The filesystem on /dev/vg_root/lv_opt is now 277504000 blocks long.

查看分区状态

[root@huidu_hx_127_88 ~]# df -hT
Filesystem           Type   Size  Used Avail Use% Mounted on
/dev/mapper/vg_root-lv_root
                     ext4    50G  9.3G   38G  20% /
tmpfs                tmpfs   24G     0   24G   0% /dev/shm
/dev/sda1            ext3    97M   30M   63M  32% /boot
/dev/mapper/vg_root-lv_opt
                     ext4   1.1T  105G  885G  11% /opt