libguestfs tools howto guide for mounting partitions and managing virtual machine images

libguestfs tools howto guide for managing virtual machine images.

libguestfs-tools aka guestfs tools has a lot of tools that make this very easy for you.  You can easily mount partitons from an image with some of the commands below.

To mount a partition
#mount the kvmuser102821.img image and the /dev/sda1 partition from it to the local directory "mount"
guestmount -a kvmuser102821.img -m /dev/sda1 mount
 



To list partition info on the image:
virt-df image.img

Filesystem                           1K-blocks       Used  Available  Use%
kvmuser102821.img:/dev/sda1           20641404     768404   18824476    4%

 



To resize (expand) an image:

#first create the destination disk of the size you want:
qemu-img create -f qcow2 kvmuser102821.img-60G 60G
Formatting 'kvmuser102821.img-60G', fmt=qcow2 size=64424509440 encryption=off cluster_size=65536

virt-resize --resize /dev/sda1=60G kvmuser102821.img kvmuser102821.img-60G

Examining kvmuser102821.img ...
 100% ⟦▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓⟧ --:--
virt-resize: error: There is a deficit of 2260992 bytes (2.2M).  You
need to make the target disk larger by at least this amount or adjust
your resizing requests.

If reporting bugs, run virt-resize with the '-d' option and include the
complete output.

#try again by increasing the target slightly in this case to 60.1G
qemu-img create -f qcow2 kvmuser102821.img-60G 60.1G
Formatting 'kvmuser102821.img-60G', fmt=qcow2 size=64531883622 encryption=off cluster_size=65536
 virt-resize --resize /dev/sda1=60G kvmuser102821.img kvmuser102821.img-60G
Examining kvmuser102821.img ...


Tags:

libguestfs, howto, managing, virtual, imageslibguestfs, images, mount, partition, kvmuser, img, dev, sda, directory, quot, guestmount, info, virt, df, filesystem, resize, expand, destination, disk, qemu, qcow, formatting, fmt, encryption, cluster_size, examining, deficit, bytes, larger, adjust, resizing, requests, reporting, output, increasing,

Latest Articles

  • virt-resize: error: libguestfs error: could not create appliance through libvirt.
  • Asterisk Does Not Retry When Authentication Fails
  • Linux Debian Ubuntu How To Install PEPPER Faster and Latest Adobe Flash Player in Firefox
  • How To Speed Up Linux Ubuntu and Debian Based Computers By Improving CPU Performance and Changing the CPU Governor
  • Convert data or file to base64 on a single line
  • Linux Mint Ubuntu Debian radeon slow 2D performance issues radeon_dp_aux_transfer_native: 158 callbacks suppressed
  • mdadm: super0.90 cannot open /dev/sdb1: Device or resource busy mdadm: /dev/sdb1 is not suitable for this array.
  • How To Install NextCloud on Centos 7 and Centos 8
  • AH01630: client denied by server configuration:
  • ERROR: Could not find a version that satisfies the requirement PIL (from versions: none) ERROR: No matching distribution found for PIL
  • ZTE Camera Cannot Work unable to connect to camera. Camera has been disabled becaue of security policies or is being used by other apps
  • QEMU KVM how to boot off a physical CD/DVD/BDROM Drive
  • How To Install OpenProject on Centos 7 Step-by-Step Guide
  • Ubuntu Debian Linux Cannot Install Wine Solution - wine1.6 : Depends: wine1.6-i386 (= 1:1.6.2-0ubuntu14.2) but it is not installable wine1.4 : Depends: wine1.6 but it is not going to be installed
  • How To Install python 3.4 3.5 and up on Linux with wine - Working Solution
  • using Xvfb on virtual remote ssh server to have X graphical programs work
  • ssh Received disconnect from port 22:2: Too many authentication failures
  • named bind errors - DNSKEY: unable to find a DNSKEY which verifies the DNSKEY RRset and also matches a trusted key for '.'
  • OpenVZ vs LXC DIR mode poor security in LXC
  • httpd: Syntax error on line 221 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/php.conf: Cannot load modules/libphp5.so into server: /lib64/libresolv.so.2: symbol __h_errno, version GLIBC_PRIVATE not defined in file libc.s