Admin at 19:26, 13 September 2021

2021-09-13T19:26:48Z

Admin at 20:24, 12 September 2021

2021-09-12T20:24:16Z

← Older revision		Revision as of 20:24, 12 September 2021
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	*Check to see if the volume group has space left, in this sample vg01 has 40.02GB left disk space which we can use.		*Check to see if the volume group has space left, in this sample vg01 has 40.02GB left disk space which we can use.
	[root@vm-~~rhe92~~ ~]# '''vgdisplay rootvg'''		[root@vm-rhe82 ~]# '''vgdisplay rootvg'''
	--- Volume group ---		--- Volume group ---
	VG Name rootvg		VG Name rootvg
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	*Teslab on Azure using RedHat8.2, in Azure we increase the Disk size from 65GB to 128GB. This is howto add the new disk space to LVM		*Teslab on Azure using RedHat8.2, in Azure we increase the Disk size from 65GB to 128GB. This is howto add the new disk space to LVM
	List the disk with parted, on the first run we will need to fix the new size by typing '''Fix'''		List the disk with parted, on the first run we will need to fix the new size by typing '''Fix'''
	[root@vm-~~rhe92~~ ~]# '''parted -l /dev/sda'''		[root@vm-rhe82 ~]# '''parted -l /dev/sda'''
	Warning: Not all of the space available to /dev/sda appears to be used, you can		Warning: Not all of the space available to /dev/sda appears to be used, you can
	fix the GPT to use all of the space (an extra 134217728 blocks) or continue with		fix the GPT to use all of the space (an extra 134217728 blocks) or continue with
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	*Parted shows now the new disk space for /dev/sda2		*Parted shows now the new disk space for /dev/sda2
	[root@vm-~~rhe92~~ ~]# '''parted -l /dev/sda'''		[root@vm-rhe82 ~]# '''parted -l /dev/sda'''
	Model: Msft Virtual Disk (scsi)		Model: Msft Virtual Disk (scsi)
	Disk /dev/sda: 137GB		Disk /dev/sda: 137GB
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	*Now resize the disk within LVM		*Now resize the disk within LVM

	[root@vm-~~rhe92~~ ~]# '''pvresize /dev/sda2'''		[root@vm-rhe82 ~]# '''pvresize /dev/sda2'''
	Physical volume "/dev/sda2" changed		Physical volume "/dev/sda2" changed
	1 physical volume(s) resized or updated / 0 physical volume(s) not resized		1 physical volume(s) resized or updated / 0 physical volume(s) not resized
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	*Check to see which partition came on new, see the kernel messages, this sample shows sdc as the latest disk which came on our system		*Check to see which partition came on new, see the kernel messages, this sample shows sdc as the latest disk which came on our system

	[root@vm-~~rhe92~~ ~]# '''dmesg \| grep Attached'''		[root@vm-rhe82 ~]# '''dmesg \| grep Attached'''
	[ 4.960356] scsi 0:0:0:0: Attached scsi generic sg0 type 0		[ 4.960356] scsi 0:0:0:0: Attached scsi generic sg0 type 0
	[ 4.992214] scsi 0:0:0:1: Attached scsi generic sg1 type 0		[ 4.992214] scsi 0:0:0:1: Attached scsi generic sg1 type 0
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	*Next is to create the new volume group in LVM, we call the volume group as '''vg01'''		*Next is to create the new volume group in LVM, we call the volume group as '''vg01'''
	[root@vm-~~rhe92~~ ~]# '''vgcreate vg01 /dev/sdc'''		[root@vm-rhe82 ~]# '''vgcreate vg01 /dev/sdc'''
	Volume group "vg01" successfully created		Volume group "vg01" successfully created

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	*As the disk is new, we need to create a filesystem before to proceed		*As the disk is new, we need to create a filesystem before to proceed
	[root@vm-~~rhe92~~ ~]# '''mkfs.xfs /dev/vg01/lv01'''		[root@vm-rhe82 ~]# '''mkfs.xfs /dev/vg01/lv01'''
	meta-data=/dev/vg01/lv01 isize=512 agcount=4, agsize=4194048 blks		meta-data=/dev/vg01/lv01 isize=512 agcount=4, agsize=4194048 blks
	= sectsz=4096 attr=2, projid32bit=1		= sectsz=4096 attr=2, projid32bit=1

Admin: Created page with " =LVM on Red Hat or Oracle Linux running in Azure= ==Increase the disk space for /var== The following samples are taken on a default '''RedHat82 on Azure''' *Check the defaul..."

2021-09-12T20:19:21Z

Created page with " =LVM on Red Hat or Oracle Linux running in Azure= ==Increase the disk space for /var== The following samples are taken on a default '''RedHat82 on Azure''' *Check the defaul..."

New page

=LVM on Red Hat or Oracle Linux running in Azure=
==Increase the disk space for /var==
The following samples are taken on a default '''RedHat82 on Azure'''

*Check the default disk configuration, in this sample /var has 8GB and is mounted on /dev/mapper/rootvg-varlv
[root@vm-rhe82 ~]# '''df -h'''
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv 2.0G 71M 2.0G 4% /
/dev/mapper/rootvg-usrlv 10G 1.5G 8.6G 15% /usr
/dev/sda1 496M 148M 348M 30% /boot
/dev/mapper/rootvg-tmplv 2.0G 47M 2.0G 3% /tmp
/dev/mapper/rootvg-homelv 1014M 40M 975M 4% /home
/dev/sda15 495M 6.9M 488M 2% /boot/efi
'''/dev/mapper/rootvg-varlv 8.0G 297M 7.8G 4% /var'''
/dev/sdb1 7.9G 36M 7.4G 1% /mnt
tmpfs 378M 0 378M 0% /run/user/1000

*Check the Logical volume next to see on which volume group we are (rootvg)

[root@vm-rhe82 ~]# '''lvdisplay /dev/mapper/rootvg-varlv'''
--- Logical volume ---
LV Path /dev/rootvg/varlv
LV Name varlv
'''VG Name rootvg'''
LV UUID L29d2z-WFNF-4vE7-t08B-KPC0-KEUP-utyBYy
LV Write Access read/write
LV Creation host, time localhost, 2021-03-04 12:14:55 +0000
LV Status available
# open 1
'''LV Size 8.00 GiB'''
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:3

*Check to see if the volume group has space left, in this sample vg01 has 40.02GB left disk space which we can use.
[root@vm-rhe92 ~]# '''vgdisplay rootvg'''
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 5
Open LV 5
Max PV 0
Cur PV 1
Act PV 1
'''VG Size <63.02 GiB'''
PE Size 4.00 MiB
Total PE 16133
'''Alloc PE / Size 5888 / 23.00 GiB'''
'''Free PE / Size 10245 / <40.02 GiB'''
VG UUID 3EaPl9-Q0Py-z12t-x1YC-R0MT-D1VN-UNch8o

*Increase /var by 10GB from 8GB to 18GB
[root@vm-rhe82 ~]# '''lvextend -L +10GB /dev/mapper/rootvg-varlv'''
Size of logical volume rootvg/varlv changed from 8.00 GiB (2048 extents) to 18.00 GiB (4608 extents).
Logical volume rootvg/varlv successfully resized.

*Extend the FXS Filesystem
**Use '''-n''' to test
[root@vm-rhe82 ~]# '''xfs_growfs /dev/mapper/rootvg-varlv'''
meta-data=/dev/mapper/rootvg-varlv isize=512 agcount=4, agsize=524288 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1
data = bsize=4096 blocks=2097152, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 2097152 to 4718592

*Check the result again and compare with the result from above, /var has now 18GB
[root@vm-rhe82 ~]# '''df -h'''
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv 2.0G 71M 2.0G 4% /
/dev/mapper/rootvg-usrlv 10G 1.5G 8.6G 15% /usr
/dev/sda1 496M 148M 348M 30% /boot
/dev/mapper/rootvg-tmplv 2.0G 47M 2.0G 3% /tmp
/dev/mapper/rootvg-homelv 1014M 40M 975M 4% /home
/dev/sda15 495M 6.9M 488M 2% /boot/efi
'''/dev/mapper/rootvg-varlv 18G 462M 18G 3% /var'''
/dev/sdb1 7.9G 36M 7.4G 1% /mnt
tmpfs 378M 0 378M 0% /run/user/1000

*Check the volume group again, the entire space has decreased by 10GB
[root@vm-rhe82 ~]# '''vgdisplay rootvg'''
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 7
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 5
Open LV 5
Max PV 0
Cur PV 1
Act PV 1
VG Size <63.02 GiB
PE Size 4.00 MiB
Total PE 16133
'''Alloc PE / Size 8448 / 33.00 GiB'''
'''Free PE / Size 7685 / <30.02 GiB'''
VG UUID 3EaPl9-Q0Py-z12t-x1YC-R0MT-D1VN-UNch8o

==Increase the OS Disk==
*Teslab on Azure using RedHat8.2, in Azure we increase the Disk size from 65GB to 128GB. This is howto add the new disk space to LVM
List the disk with parted, on the first run we will need to fix the new size by typing '''Fix'''
[root@vm-rhe92 ~]# '''parted -l /dev/sda'''
Warning: Not all of the space available to /dev/sda appears to be used, you can
fix the GPT to use all of the space (an extra 134217728 blocks) or continue with
the current setting?
Fix/Ignore? '''Fix'''
Model: Msft Virtual Disk (scsi)
Disk /dev/sda: 137GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
14 1049kB 5243kB 4194kB bios_grub
15 5243kB 524MB 519MB fat16 EFI System Partition boot, esp
1 525MB 1050MB 524MB xfs
'''2 1050MB 68.7GB 67.7GB lvm'''

*Next we need to know where to expand the new partition, this sample shows /dev/sda2

[root@vm-rhe82 ~]# '''pvdisplay'''
--- Physical volume ---
'''PV Name /dev/sda2'''
VG Name rootvg
PV Size 63.02 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 16133
Free PE 7685
Allocated PE 8448
PV UUID uevLg0-eCem-PQIV-0lUJ-ViuH-BQPi-C4PSIo

*Optional confirm with lsblk

[root@vm-rhe82 ~]# '''lsblk'''
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 128G 0 disk
├─sda1 8:1 0 500M 0 part /boot
'''├─sda2 8:2 0 63G 0 part'''
│ ├─rootvg-tmplv 253:0 0 2G 0 lvm /tmp
│ ├─rootvg-usrlv 253:1 0 10G 0 lvm /usr
│ ├─rootvg-homelv 253:2 0 1G 0 lvm /home
│ ├─rootvg-varlv 253:3 0 18G 0 lvm /var
│ └─rootvg-rootlv 253:4 0 2G 0 lvm /
├─sda14 8:14 0 4M 0 part
└─sda15 8:15 0 495M 0 part /boot/efi
sdb 8:16 0 8G 0 disk
└─sdb1 8:17 0 8G 0 part /mnt

*The above information shows partition number 2 which we wnat to grow up to 128GB
[root@vm-rhe82 ~]# '''growpart /dev/sda 2'''
CHANGED: partition=2 start=2050048 old: size=132165632 end=134215680 new: size=266385375 end=268435423

*Parted shows now the new disk space for /dev/sda2
[root@vm-rhe92 ~]# '''parted -l /dev/sda'''
Model: Msft Virtual Disk (scsi)
Disk /dev/sda: 137GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
14 1049kB 5243kB 4194kB bios_grub
15 5243kB 524MB 519MB fat16 EFI System Partition boot, esp
1 525MB 1050MB 524MB xfs
'''2 1050MB 137GB 136GB lvm'''

*Now resize the disk within LVM

[root@vm-rhe92 ~]# '''pvresize /dev/sda2'''
Physical volume "/dev/sda2" changed
1 physical volume(s) resized or updated / 0 physical volume(s) not resized

*Check the volume group again, compare it from the result above to see how rootvg increased

[root@vm-rhe82 ~]# '''vgdisplay'''
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 5
Open LV 5
Max PV 0
Cur PV 1
Act PV 1
'''VG Size <127.02 GiB'''
PE Size 4.00 MiB
Total PE 32517
'''Alloc PE / Size 8448 / 33.00 GiB'''
'''Free PE / Size 24069 / <94.02 GiB'''
VG UUID 3EaPl9-Q0Py-z12t-x1YC-R0MT-D1VN-UNch8o

==Add a new Disk and replace the mount point /var to the new disk==
Teslab on Azure using RedHat8.2, in Azure we added a new disk which we want to replace with /var

*Check to see which partition came on new, see the kernel messages, this sample shows sdc as the latest disk which came on our system

[root@vm-rhe92 ~]# '''dmesg | grep Attached'''
[ 4.960356] scsi 0:0:0:0: Attached scsi generic sg0 type 0
[ 4.992214] scsi 0:0:0:1: Attached scsi generic sg1 type 0
[ 5.228196] sd 0:0:0:1: [sdb] Attached SCSI disk
[ 5.354066] sd 0:0:0:0: [sda] Attached SCSI disk
[ 2675.092988] sd 1:0:0:0: Attached scsi generic sg2 type 0
'''[ 2675.145990] sd 1:0:0:0: [sdc] Attached SCSI disk'''

*Next is to create the new disk in LVM
[root@vm-rhe82 ~]# '''pvcreate /dev/sdc'''
Physical volume "/dev/sdc" successfully created.

*Next is to create the new volume group in LVM, we call the volume group as '''vg01'''
[root@vm-rhe92 ~]# '''vgcreate vg01 /dev/sdc'''
Volume group "vg01" successfully created

*Next is to create the logcal volume in LVM, we call the logical volume group as '''lv01''' and use all space
[root@vm-rhe82 ~]# '''lvcreate -n lv01 -l 100%FREE vg01'''
Logical volume "lv01" created.

*As the disk is new, we need to create a filesystem before to proceed
[root@vm-rhe92 ~]# '''mkfs.xfs /dev/vg01/lv01'''
meta-data=/dev/vg01/lv01 isize=512 agcount=4, agsize=4194048 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1
data = bsize=4096 blocks=16776192, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=8191, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0

*Now create a temp folder for /var, say we create /var-temp
[root@vm-rhe82 ~]# '''mkdir /var-temp'''

*Next mount our new disk to here:
[root@vm-rhe82 ~]# '''mount /dev/vg01/lv01 /var-temp'''

*Check the result, /var-temp should come up and we show also to which we want to replace

[root@vm-rhe82 ~]# '''df -h'''
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv 2.0G 71M 2.0G 4% /
/dev/mapper/rootvg-usrlv 10G 1.5G 8.6G 15% /usr
/dev/mapper/rootvg-tmplv 2.0G 47M 2.0G 3% /tmp
/dev/mapper/rootvg-homelv 1014M 40M 975M 4% /home
/dev/sda1 496M 148M 348M 30% /boot
/dev/sda15 495M 6.9M 488M 2% /boot/efi
'''/dev/mapper/rootvg-varlv 18G 440M 18G 3% /var'''
/dev/sdb1 7.9G 36M 7.4G 1% /mnt
tmpfs 378M 0 378M 0% /run/user/1000
'''/dev/mapper/vg01-lv01 64G 489M 64G 1% /var-temp'''

*Copy the actual data to var-temp, keep the exact file attributes
[root@vm-rhe82 ~]# '''rsync -avAXEWSlHh /var/* /var-temp/ --no-compress'''

*Add the new disk into etc/fstab
**Make sure that there are no more mount points to /var
echo "/dev/mapper/vg01-lv01 /var xfs defaults 0 0" >> /etc/fstab

*Check to see if we are ok by test:
[root@vm-rhe82 ~]# '''mount -fav'''
/ : ignored
/boot : already mounted
/boot/efi : already mounted
/home : already mounted
/tmp : already mounted
/usr : already mounted
/mnt : already mounted
'''/var : successfully mounted'''

*Reboot and cross fingers
[root@vm-rhe82 ~]# init 6

*After reboot check the result:
[root@vm-rhe82 ~]# '''df -h'''
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 17M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv 2.0G 71M 2.0G 4% /
/dev/mapper/rootvg-usrlv 10G 1.5G 8.6G 15% /usr
/dev/mapper/rootvg-tmplv 2.0G 47M 2.0G 3% /tmp
/dev/mapper/rootvg-homelv 1014M 40M 975M 4% /home
/dev/sda1 496M 148M 348M 30% /boot
/dev/sda15 495M 6.9M 488M 2% /boot/efi
'''/dev/mapper/vg01-lv01 64G 764M 64G 2% /var'''
/dev/sdb1 7.9G 36M 7.4G 1% /mnt
tmpfs 378M 0 378M 0% /run/user/1000

*Check the VG size again
[root@vm-rhe82 ~]# '''vgdisplay rootvg | grep -i free'''
Free PE / Size 24069 / <94.02 GiB

*Cleanup: Delete the old logical volume group
[root@vm-rhe82 ~]# '''lvremove /dev/rootvg/varlv'''
Do you really want to remove active logical volume rootvg/varlv? [y/n]: y
Logical volume "varlv" successfully removed

*Check the VG size again
[root@vm-rhe82 ~]# '''vgdisplay rootvg | grep -i free'''
Free PE / Size 28677 / <112.02 GiB

=List Commands=
*List Disks
lshw -class disk
lvmdiskscan

*List Size and add Total
df -h --output=size --total

*Automount from fstab
mount -a

*Simulate
mount -fav

=Links=
*https://docs.microsoft.com/en-us/azure/virtual-machines/linux/resize-os-disk-gpt-partition
*https://www.shellbefehle.de

Disk Management in Azure - Revision history

Admin at 19:26, 13 September 2021

Admin at 20:24, 12 September 2021

Admin: Created page with " =LVM on Red Hat or Oracle Linux running in Azure= ==Increase the disk space for /var== The following samples are taken on a default '''RedHat82 on Azure''' *Check the defaul..."