[Gluster-users] Restore a replica after failed hardware

[Shanon Swafford]

Hi guys,

 

I lost a brick in a 2x replicated system.  The volume is 17TB with 9TB used
( small files ).  3 drives failed in 2 hours in a raid-5 array.

 

Gluster version: 3.8.15

 

So "reset-brick" isn't available on this version.

 

I've googled all weekend and I'm overwhelmed so I'd like to verify before I
muck everything up.

 

Is this the correct procedure to restore the failed brick?

 

# Replace drive

# Use parted to create /dev/sdb1

# Make xfs filesystem on /dev/sdb1

# Mount /var/glusterfs/sdb1

# gluster volume replace-brick myvol d-es2-nfs-a:/var/glusterfs/sdb1/myvol
d-es2-nfs-a:/var/glusterfs/sdb1/myvol commit force 

 

I read about using different brick names but again, I'm overwhelmed with all
the info on google.

 

I also saw something as simple as remove failed and re-add as new but..

 

Now I just read about xfsdump | xfsrestore to preload, but how would that
work with healing?

 

Thanks a ton in advance.

 

Shanon

 

 

 

[root at es2-nfs-a ~]# parted /dev/sdb print

Error: /dev/sdb: unrecognised disk label

Model: DELL PERC H700 (scsi)

Disk /dev/sdb: 18.2TB

Sector size (logical/physical): 512B/512B

Partition Table: unknown

Disk Flags:

 

 

[root at es2-nfs-a ~]# grep sdb /etc/fstab

/dev/sdb1               /var/glusterfs/sdb1     xfs     inode64         0 0

 

 

[root at es2-nfs-a ~]# gluster volume info

 

Volume Name: myvol

Type: Replicate

Volume ID: 49fd2a63-f887-4478-9242-69030a7a565d

Status: Started

Snapshot Count: 0

Number of Bricks: 1 x 2 = 2

Transport-type: tcp

Bricks:

Brick1: d-es2-nfs-a:/var/glusterfs/sdb1/myvol

Brick2: d-es2-nfs-b:/var/glusterfs/sdb1/myvol

Options Reconfigured:

nfs.disable: on

performance.readdir-ahead: on

transport.address-family: inet

performance.cache-size: 1GB

 

 

[root at es2-nfs-a ~]# gluster volume status

Status of volume: myvol

Gluster process                             TCP Port  RDMA Port  Online  Pid

----------------------------------------------------------------------------
--

Brick d-es2-nfs-a:/var/glusterfs/sdb1/myvol

Brick d-es2-nfs-b:/var/glusterfs/sdb1/myvol

Self-heal Daemon on localhost               N/A       N/A        Y
2475

Self-heal Daemon on d-es2-nfs-b             N/A       N/A        Y
8663

 

Task Status of Volume myvol

----------------------------------------------------------------------------
--

There are no active volume tasks

 

 

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