GNU/Linux

Ubuntu upgrade from 14.04 to 16.04

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Ubuntu upgrade from 14.04 to 16.04

logo-ubuntu
logo-ubuntu

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

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How to grow RAID+LUKS+lvm+xfs
clone partition table, add disk to mdraid, resize mdraid, cryptsetup and Volume Group

luks
luks

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*