Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Guys,
I have been trying to setup and configure DRBD in my system in order to replicate the information for MySQL. I have followed the instructions line by line, but I keep getting the following error the moment I try to create the partition for the DRBD:
Notice that I have created sda3 storage for the DRBD-managed data:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 445.8G 0 part
│ ├─vg_ausha1srv-lv_root (dm-0) 253:0 0 5.1G 0 lvm /
│ ├─vg_ausha1srv-lv_swap (dm-1) 253:1 0 5.9G 0 lvm [SWAP]
│ ├─vg_ausha1srv-lv_home (dm-2) 253:2 0 19.5G 0 lvm /home
│ └─vg_ausha1srv-lv_var (dm-3) 253:3 0 415.3G 0 lvm /var
└─sda3
As per instructions, If your hosts don’t already have an empty partition that you plan to use for the DRBD-managed data then that must be created first – even before that confirm that you have a disk available which hasn’t already been partitioned:
# fdisk -cu /dev/sda3
The device presents a logical sector size that is smaller than
the physical sector size. Aligning to a physical sector (or optimal
I/O) size boundary is recommended, or performance may be impacted.
Command (m for help): p
Disk /dev/sda3: 21.0 GB, 20971520000 bytes
255 heads, 63 sectors/track, 2549 cylinders, total 40960000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x722c5a42
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First sector (2048-40959999, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-40959999, default 40959999):
Using default value 40959999
Command (m for help): p
Disk /dev/sda3: 21.0 GB, 20971520000 bytes
255 heads, 63 sectors/track, 2549 cylinders, total 40960000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x722c5a42
Device Boot Start End Blocks Id System
/dev/sda3p1 2048 40959999 20478976 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 22: Invalid argument.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
# mkfs.ext4 /dev/sda3
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 445.8G 0 part
│ ├─vg_ausha1srv-lv_root (dm-0) 253:0 0 5.1G 0 lvm /
│ ├─vg_ausha1srv-lv_swap (dm-1) 253:1 0 5.9G 0 lvm [SWAP]
│ ├─vg_ausha1srv-lv_home (dm-2) 253:2 0 19.5G 0 lvm /home
│ └─vg_ausha1srv-lv_var (dm-3) 253:3 0 415.3G 0 lvm /var
└─sda3 8:3 0 19.5G 0 part <——----- OK
# drbdadm create-md clusterdb_res
md_offset 20971515904
al_offset 20971483136
bm_offset 20970840064
Found ext3 filesystem
20480000 kB data area apparently used
20479336 kB left usable by current configuration
Device size would be truncated, which
would corrupt data and result in
'access beyond end of device' errors.
You need to either
* use external meta data (recommended)
* shrink that filesystem first
* zero out the device (destroy the filesystem)
Operation refused.
Command 'drbdmeta 0 v08 /dev/sda3 internal create-md' terminated with exit code 40
drbdadm create-md clusterdb_res: exited with code 40
I have gone over old queries about this same subject, but no one gives a detail description on how to solve this. Here is my /etc/drbd.d/clusterdb_res.res file.
on ha1-srv {
device /dev/drbd0;
disk /dev/sda3;
address 1.1.1.11:7788;
flexible-meta-disk internal;
}
on ha2-srv {
device /dev/drbd0;
disk /dev/sda3;
address 1.1.1.12:7788;
meta-disk internal;
}
I will appreciate if you can look at the steps I am following and tell me if I am missing something. Let me know if you need more information.
Many Thanks in Advance,
Jaime
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