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<!-- NotesZfsHotSwappingMirrorsOnLivePools, Version: 1, Modified: 2018/12/02, Author: trac -->
# Hot swapping disks on live zfs pools
*HOLY FUCKING AWESOME!!!!*
Watch while I add a fresh disk as a mirror, resliver the pool and remove and repartition the original disk while the container using the pool is still running!!!
YOU ARE HERE - making this into a structured document
```sh
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
scan: scrub repaired 0 in 0h2m with 0 errors on Sun Aug 12 00:27:02 2018
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
sda1 ONLINE 0 0 0
errors: No known data errors
root@bs2020:~# zpool add -n lxd4infra mirror sdb
invalid vdev specification: mirror requires at least 2 devices
root@bs2020:~# zpool add -n lxd4infra mirror sda1 sdb
invalid vdev specification
use '-f' to override the following errors:
/dev/sda1 is part of active pool 'lxd4infra'
/dev/sdb does not contain an EFI label but it may contain partition
information in the MBR.
root@bs2020:~# mklabel GPT /dev/sdb
bash: mklabel: command not found
root@bs2020:~# parted /dev/sdb
bash: parted: command not found
root@bs2020:~# gparted /dev/sdb
bash: gparted: command not found
root@bs2020:~# zpool add -nf lxd4infra mirror sda1 sdb
invalid vdev specification
the following errors must be manually repaired:
/dev/sda1 is part of active pool 'lxd4infra'
root@bs2020:~# zpool add -nf lxd4infra mirror sdb sda1
invalid vdev specification
the following errors must be manually repaired:
/dev/sda1 is part of active pool 'lxd4infra'
root@bs2020:~# zpool add -nf lxd4infra mirror sdb
invalid vdev specification: mirror requires at least 2 devices
root@bs2020:~# zpool add -nf lxd4infra sda1 mirror sdb
invalid vdev specification: mirror requires at least 2 devices
root@bs2020:~# zpool attach -n sda1 sdb
invalid option 'n'
usage:
attach [-f] [-o property=value] <pool> <device> <new-device>
root@bs2020:~# zpool attach sda1 sdb
missing <new_device> specification
usage:
attach [-f] [-o property=value] <pool> <device> <new-device>
root@bs2020:~# zpool attach lxd4infra sda1 sdb
invalid vdev specification
use '-f' to override the following errors:
/dev/sdb does not contain an EFI label but it may contain partition
information in the MBR.
root@bs2020:~# gparted
bash: gparted: command not found
root@bs2020:~# parted
bash: parted: command not found
root@bs2020:~# apt-get install parted
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
libparted2
Suggested packages:
libparted-dev libparted-i18n parted-doc
The following NEW packages will be installed:
libparted2 parted
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 158 kB of archives.
After this operation, 520 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libparted2 amd64 3.2-15ubuntu0.1 [115 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 parted amd64 3.2-15ubuntu0.1 [42.4 kB]
Fetched 158 kB in 0s (277 kB/s)
Selecting previously unselected package libparted2:amd64.
(Reading database ... 32152 files and directories currently installed.)
Preparing to unpack .../libparted2_3.2-15ubuntu0.1_amd64.deb ...
Unpacking libparted2:amd64 (3.2-15ubuntu0.1) ...
Selecting previously unselected package parted.
Preparing to unpack .../parted_3.2-15ubuntu0.1_amd64.deb ...
Unpacking parted (3.2-15ubuntu0.1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up libparted2:amd64 (3.2-15ubuntu0.1) ...
Setting up parted (3.2-15ubuntu0.1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
root@bs2020:~# parted /dev/sdb
GNU Parted 3.2
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel GPT
(parted) w
align-check TYPE N check partition N for TYPE(min|opt) alignment
help [COMMAND] print general help, or help on COMMAND
mklabel,mktable LABEL-TYPE create a new disklabel (partition table)
mkpart PART-TYPE [FS-TYPE] START END make a partition
name NUMBER NAME name partition NUMBER as NAME
print [devices|free|list,all|NUMBER] display the partition table, available devices, free space, all found partitions, or a particular
partition
quit exit program
rescue START END rescue a lost partition near START and END
resizepart NUMBER END resize partition NUMBER
rm NUMBER delete partition NUMBER
select DEVICE choose the device to edit
disk_set FLAG STATE change the FLAG on selected device
disk_toggle [FLAG] toggle the state of FLAG on selected device
set NUMBER FLAG STATE change the FLAG on partition NUMBER
toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBER
unit UNIT set the default unit to UNIT
version display the version number and copyright information of GNU Parted
(parted) q
Information: You may need to update /etc/fstab.
root@bs2020:~# zpool attach lxd4infra sda1 sdb
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Tue Sep 4 09:05:14 2018
182M scanned out of 5.38G at 10.7M/s, 0h8m to go
181M resilvered, 3.30% done
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sda1 ONLINE 0 0 0
sdb ONLINE 0 0 0 (resilvering)
errors: No known data errors
root@bs2020:~# packet_write_wait: Connection to 198.202.31.242: Broken pipe
steve:~ don$ ssh feurig@bs2020.suspectdevices.com
Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-96-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
0 packages can be updated.
0 updates are security updates.
New release '18.04.1 LTS' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Tue Sep 4 08:26:28 2018 from 75.164.203.77
feurig@bs2020:~$ sudo bash
[sudo] password for feurig:
root@bs2020:~# packet_write_wait: Connection to 198.202.31.242: Broken pipe
steve:~ don$ ssh feurig@bs2020.suspectdevices.com
Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-96-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
0 packages can be updated.
0 updates are security updates.
New release '18.04.1 LTS' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Wed Sep 5 16:10:53 2018 from 75.164.203.77
feurig@bs2020:~$ sudo bash
[sudo] password for feurig:
root@bs2020:~# packet_write_wait: Connection to 198.202.31.242: Broken pipe
steve:~ don$
steve:~ don$ ssh feurig@bs2020.suspectdevices.com
Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-96-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
0 packages can be updated.
0 updates are security updates.
New release '18.04.1 LTS' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Wed Sep 5 18:56:14 2018 from 75.164.203.77
feurig@bs2020:~$ sudo bash
[sudo] password for feurig:
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
scan: resilvered 5.38G in 0h6m with 0 errors on Tue Sep 4 09:11:31 2018
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sda1 ONLINE 0 0 0
sdb ONLINE 0 0 0
errors: No known data errors
root@bs2020:~# zpool detach -n lxd4infra sda1
invalid option 'n'
usage:
detach <pool> <device>
root@bs2020:~# zpool detach lxd4infra sda1
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
scan: resilvered 5.38G in 0h6m with 0 errors on Tue Sep 4 09:11:31 2018
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
sdb ONLINE 0 0 0
errors: No known data errors
root@bs2020:~# gparted /dev/sda
bash: gparted: command not found
root@bs2020:~# parted /dev/sda
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel GPT
Warning: The existing disk label on /dev/sda will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? y
(parted) q
Information: You may need to update /etc/fstab.
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
scan: resilvered 5.38G in 0h6m with 0 errors on Tue Sep 4 09:11:31 2018
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
sdb ONLINE 0 0 0
errors: No known data errors
root@bs2020:~# zpool attach lxd4infra sdb sda
root@bs2020:~# zpool status
pool: lxd4dev
state: ONLINE
scan: scrub repaired 0 in 0h8m with 0 errors on Sun Aug 12 00:32:48 2018
config:
NAME STATE READ WRITE CKSUM
lxd4dev ONLINE 0 0 0
sdd1 ONLINE 0 0 0
sdf ONLINE 0 0 0
sde ONLINE 0 0 0
errors: No known data errors
pool: lxd4infra
state: ONLINE
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Thu Sep 6 09:24:09 2018
69.8M scanned out of 5.42G at 5.37M/s, 0h17m to go
67.9M resilvered, 1.26% done
config:
NAME STATE READ WRITE CKSUM
lxd4infra ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sdb ONLINE 0 0 0
sda ONLINE 0 0 0 (resilvering)
errors: No known data errors
root@bs2020:~#
```
|
