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--- kvm:kvm [2020/02/26 12:41] – [clone domain/ vm] tmade
+++ kvm:kvm [2022/03/12 09:13] (current) – [Commands] tmade
@@ Line 4: / Line 4: @@
   apt-get install qemu-kvm virtinst virt-manager bridge-utils libosinfo-bin
+  apt install -y qemu qemu-kvm libvirt-daemon libvirt-clients bridge-utils virt-manager    #ubuntu 20.04
   sudo adduser $USER kvm
   #apt-get install qemu-kvm libvirt-bin virtinst bridge-utils cpu-checker
@@ Line 11: / Line 13: @@
   https://github.com/LuyaoHuang/virsh-bash-completion                               #bash completion
+====Network====
+Set your network devices on OS level such as (example with 2 network interfaces "enp4s0" and "eno1" which is bridge slave interface for bridge "vmbr0"):
+<code>
+# This file describes the network interfaces available on your system
+# For more information, see netplan(5).
+network:
+ version: 2
+ renderer: networkd
+ ethernets:
+   enp4s0:
+     dhcp4: no
+     dhcp6: no
+     addresses: [192.168.1.100/24]
+     gateway4: 192.168.1.1
+     mtu: 1500
+     nameservers:
+       addresses: [192.168.1.1]
+       search: [local]
+   eno1:
+     dhcp4: no
+     dhcp6: no
+ bridges:
+   vmbr0:
+     dhcp4: no
+     dhcp6: no
+     interfaces: [eno1]
+     addresses: [10.0.0.100/24]
+     gateway4: 10.0.0.1
+     mtu: 1500
+     #nameservers:
+     #  addresses: [8.8.8.8,8.8.4.4]
+     #parameters:
+     #  stp: true
+     #  forward-delay: 4
+</code>
 ====Commands====
@@ Line 16: / Line 56: @@
   virsh list --all                                                 #show all vm´s
   virsh undefine vm1
-  virsh destroy vm1
+  virsh destroy vm1                                                #forcefully and immediately stop a given domain - the vm won´t be destoyed, just stopped.
   virsh start vm-name
   virsh autostart test                                             #
@@ Line 23: / Line 63: @@
   virsh suspend vm-name
   virsh resume vm-name
+  virsh domrename foo bar                                          #rename vm from foo to bar
   virsh autostart vm-name
   virsh autostart --disable vm-name
@@ Line 32: / Line 73: @@
   virsh net-list --all                                             #list all network configs
   virsh dumpxml vm-name                                            #xml-config to stdout
+  virsh dumpxml master > master.xml                                #backup vm
+  virsh define master.xml                                          #restore vm
   virt-manager                                                     #gui to show, manage and create vm´s
-  virsh snapshot-list vm-name
+====snapshot====
+  virsh snapshot-list vm-name                                                 #list all snaps
+  virsh snapshot-list vm-name--tree
   virsh snapshot-create-as vm-name
   virsh snapshot-create-as --domain vm-name --name snap-name
+  virsh snapshot-create-as vm-name
+  virsh snapshot-create-as vm-name "snap1" --diskspec sda,file=/var/backups/snapshots/snap1-vm-name.qcow2 --disk-only --atomic
   virsh snapshot-info --domain vm-name --snapshotname snap-name
   virsh snapshot-revert --current vm-name
@@ Line 41: / Line 88: @@
   virsh snapshot-delete --domain vm-name --snapshotname snap-name
   virsh snapshot-create-as --disk-only vm-name
-  virsh snapshot-delete --current --metadata vm-name               #delete "disk-snapshot"
+  virsh snapshot-edit --rename  --domain vm-name --snapshotname snap-name     #rename
+  virsh snapshot-delete --current --metadata vm-name                          #delete "disk-snapshot"
+  qemu-img info --backing-chain test.qcow2
+  qemu-img info test.qcow2
+  qemu-img convert -O output_format source destination
+  virsh domblklist vm-name
+  virsh blockcommit vm-name sda --active --verbose --pivot
+===Change Path Of "backing file"===
+<code sh rename-backup-path.sh>
+#!/bin/bash
+BACKINGFILE="/kvm/images/master.qcow2"
+QCOW2_FILE_TO_CHANGE="master.1586464836"
+sudo qemu-img rebase \
+  -f qcow2 \
+  -u \
+  -b $BACKINGFILE \
+  $QCOW2_FILE_TO_CHANGE
+</code>
+Other:
+<code>
+sudo qemu-img rebase \
+  -f qcow2 \
+  -b $NEW_BACKING_FILE \
+  $QCOW2_FILE_TO_CHANGE
+</code>
+===Merge snapshot and backing file into standalone disk===
+<code>
+cp test1-base new-master                                 #test1-base = base-disk
+qemu-img rebase -b new-master test1-master-0             #snapshot="test1-master-0"
+qemu-img commit test1-master-0
+qemu-img commit new-master                               #output if success: "Image committed"
+Image committed.
+qemu-img info new-master
+</code>
+===Backup===
+<code>
+virsh blockcopy --domain kmaster sda \
+  /data/images/backup/copy.qcow2 \
+  --wait --verbose --shallow \
+  --pivot
+</code>
 ====Pool====
-  virsh pool-list                                                  #show active storage pool
   virsh pool-list --all                                            #show also inactice pool
+  virsh pool-list                                                  #show active storage pool
+  virsh pool-list --details                                        #show details like disk usage
   virsh pool-info poolname                                         #detailed pool info
   virsh pool-autostart poolame
   virsh pool-start poolname
-  virsh pool-undefine poolname                                     #set inactive
+  virsh pool-undefine poolname                                     #delete pool "default"
-  virsh pool-destroy poolname                                      #delete pool "default"
+  virsh pool-destroy poolname                                      #set inactive
   virsh pool-edit poolname
   virsh pool-define-as --name default --type dir --target /media/work/kvm
+  virsh pool-refresh --pool default
+  virsh pool-refresh --pool kvm-vm
 ====Volume====
   virsh vol-list default
   virsh vol-list default --details
+  virsh vol-list kvm-vm --details
   virsh vol-delete volume-name.qcow2  --pool default
   virsh vol-create-as default test_vol2.qcow2 2G
   virsh vol-clone --pool default vol1.qcow2 vol2.qcow2
-  qemu-img resize volume-name.qcow2 30G
+  qemu-img resize volume-name.qcow2 30G && virsh pool-refresh --pool poolname0 #vm has to be shutdown!
+Pool refesh an volume list:
+<code sh pool-vol-ref.sh>
+#!/bin/bash
+virsh pool-refresh --pool poolname0
+virsh pool-refresh --pool poolname1
+virsh vol-list poolname0 --details
+virsh vol-list poolname1 --details
+</code>
 ====clone domain/ vm====