1. Resize with qemu-img in host:

1sudo qemu-img resize /var/lib/libvirt/images/fedora-kernel.qcow2 +15G

1. Check the new size in host:

1[ecomaikgolf@laptop ~/]$ sudo qemu-img info /var/lib/libvirt/images/fedora-kernel.qcow2
2image: /var/lib/libvirt/images/fedora-kernel.qcow2
3file format: qcow2
4virtual size: 35 GiB (37580963840 bytes)
5disk size: 15.1 GiB
6cluster_size: 65536
7Format specific information:
8    compat: 1.1
9    compression type: zlib
10    lazy refcounts: true
11    refcount bits: 16
12    corrupt: false
13    extended l2: false
14Child node '/file':
15    filename: /var/lib/libvirt/images/fedora-kernel.qcow2
16    protocol type: file
17    file length: 20 GiB (21478506496 bytes)
18    disk size: 15.1 GiB

1. (LVM) Resize from guest:

1. (LVM) Resize LVM partition:

1sudo pvresize /dev/vda3

1[6.7.4-200.fc39.x86_64 ~/]$ sudo pvdisplay         
2  --- Physical volume ---
3  PV Name               /dev/vda3
4  VG Name               fedora
5  PV Size               <34.00 GiB / not usable 16.50 KiB <-- NEW SIZE
6  Allocatable           yes 
7  PE Size               4.00 MiB
8  Total PE              8703
9  Free PE               3840
10  Allocated PE          4863
11  PV UUID               Njz9OK-9e0P-Owt3-hEB6-bSNc-S4gz-OhaErD

1sudo lvextend -l +100%FREE /dev/fedora/root

1[6.7.4-200.fc39.x86_64 ~/]$ sudo lvs
2  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
3  root fedora -wi-ao---- <34.00g <-- NEW SIZE

1[6.7.4-200.fc39.x86_64 ~/]$ sudo lsblk
2NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
3zram0           251:0    0  1.9G  0 disk [SWAP]
4vda             252:0    0   35G  0 disk 
5|-vda1          252:1    0    1M  0 part 
6|-vda2          252:2    0    1G  0 part /boot
7`-vda3          252:3    0   34G  0 part 
8  `-fedora-root 253:0    0   34G  0 lvm  / <-- NEW SIZE

1. “Enlarge FS size”

1[6.7.4-200.fc39.x86_64 ~/]$ sudo xfs_growfs /dev/fedora/root 
2meta-data=/dev/mapper/fedora-root isize=512    agcount=4, agsize=983040 blks
3         =                       sectsz=512   attr=2, projid32bit=1
4         =                       crc=1        finobt=1, sparse=1, rmapbt=0
5         =                       reflink=1    bigtime=1 inobtcount=1 nrext64=0
6data     =                       bsize=4096   blocks=3932160, imaxpct=25
7         =                       sunit=0      swidth=0 blks
8naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
9log      =internal log           bsize=4096   blocks=16384, version=2
10         =                       sectsz=512   sunit=0 blks, lazy-count=1
11realtime =none                   extsz=4096   blocks=0, rtextents=0
12data blocks changed from 3932160 to 8911872