Ubuntu upgrade from 14.04 to 16.04
To upgrade from Ubuntu 14.04 to 16.04, you can use the ubuntu tool update-manager. This tool make a clean upgrade from the system.
Please before update your system.
sudo apt-get update
sudo apt-get dist-upgrade
If you are done with the upgrade, install the update-manager-core.
sudo apt-get install update-manager-core
Now upgrade to the new ubuntu release.
sudo do-release-upgrade -d
How to grow RAID+LUKS+lvm+xfs
clone partition table, add disk to mdraid, resize mdraid, cryptsetup and Volume Group
If you like to add a new disk to mdadm raid, you should clone the partition layout.
sgdisk -R /dev/sdY /dev/sdX sgdisk -G /dev/sdY
The first command copies the partition table of sdX to sdY (be careful not to mix these up). The second command randomizes the GUID on the disk and all the partitions. This is only necessary if the disks are to be used in the same machine, otherwise it’s unnecessary.
Add new disks to raid:
mdadm --add /dev/sdb1
Grow the raid:
mdadm --grow --raid-devices=9 --backup-file=/tmp/grow_md2.bak /dev/md2
Information of reshape:
cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid10]
md1 : active raid1 sdg4[5] sdh4[4] sdi4[3] sdj4[1]
927603520 blocks super 1.2 [4/3] [UUU_]
resync=DELAYED
md0 : active raid1 sdg2[5] sdi2[0] sdh2[4] sdj2[1]
976320 blocks super 1.2 [4/3] [UUU_]
resync=DELAYED
md2 : active raid6 sdg5[10](S) sdi5[8] sdj5[9] sdh5[11] sdd1[3] sdb1[0] sdf1[5] sdc1[2] sde1[4] sda1[1]
20510934528 blocks super 1.2 level 6, 512k chunk, algorithm 2 [10/9] [UUUUUUUU_U]
[====>................] reshape = 20.2% (592765952/2930133504) finish=3123.9min speed=12469K/sec
unused devices:
Speed up the rebuild or reshape:
If you only have 1000, you should set to a higher value.
cat /proc/sys/dev/raid/speed_limit_min 1000
Set the speed_limit_min to 50000.
echo 50000 > /proc/sys/dev/raid/speed_limit_min
Resize the partition with parted:
parted /dev/md2 resizepart
Resize the LUKS partition:
cryptsetup resize cryptvg
Show the status from the LUKS partition:
cryptsetup status cryptvg
Show the status from the physical volume:
pvdisplay
Resize the physical volume
pvresize /dev/mapper/cryptvg
Show the status from the volume group:
vgs
Resize the xfs filesystem:
xfs_growfs /dev/cryptvg/test
Tricks
Detail information of the mdadm raid.
mdadm --detail /dev/md1
If you have a problem with the raid:
mdadm --stop /dev/md2 mdadm --assemble /dev/md2 /dev/sdh5 /dev/sdb1 /dev/sde1 /dev/sdc1 /dev/sdf1 /dev/sdd1 /dev/sda1 /dev/sdi5 /dev/sdg5 mdadm --run /dev/md2
If it now work, force:
mdadm --assemble --run --force /dev/md2 /dev/sdb1 /dev/sde1 /dev/sdc1 /dev/sdf1 /dev/sdd1 /dev/sda1 /dev/sdi5 /dev/sdg5 /dev/sdh5
Disk status
mdadm --examine /dev/sd*