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--- virtualisation [2024/05/18 11:55] – [Qemu - checkpoints] admin
+++ virtualisation [2024/09/23 20:05] (current) – [Qemu - checkpoints] admin
@@ Line 1: / Line 1: @@
-====== Virtualisation ======
+====== Virtualization ======
+ VMware OS Optimization Tool. -
+===== pre installed virtualbox images =====
+https://www.sysprobs.com/download-pre-installed-virtualbox-images-linux-windows#Windows-VMs \\
 ===== KVM =====
   * https://kb.novaordis.com/index.php/Linux_Virtualization_Concepts https://kb.novaordis.com/index.php/KVM_Virtual_Machine_XML_Defintion https://kb.novaordis.com/index.php/KVM_Virtual_Networking_Concepts
@@ Line 13: / Line 16: @@
 ===== Qemu =====
-  * start qemu without libvirt <https://habr.com/ru/articles/728952/>
+  * start qemu without libvirt, raw start <https://habr.com/ru/articles/728952/>
 ==== Virsh ====
   * virsh cheatcode https://computingforgeeks.com/virsh-commands-cheatsheet/
+==== Backup Snapshots ====
+  * commands and logic https://sysguides.com/create-and-manage-internal-snapshots-in-kvm
+  * old scripts https://b14esh.com/virtualization/kvm/backup-vm-qemu-kvm-libvirt.html
+==== Nested virtualization - hyper-v ====
+  * https://www.redpill-linpro.com/techblog/2021/04/07/nested-virtualization-hyper-v-in-qemu-kvm.html
 ==== Qemu - checkpoints  ====
+Testing system updates using libvirts checkpoint feature - https://abbbi.github.io/changes/ \\
+virtndbackup error - https://github.com/abbbi/virtnbdbackup/discussions/119 \\
+working with bitmaps qmp https://kashyapc.fedorapeople.org/QEMU-Docs/_build/html/docs/interop/bitmaps.html#id1 \\
+<code BASH>
+# bitmap
+qemu-img bitmap  --remove  ./local_copy_1_154.hdd.qcow2 virtnbdbackup.1
+#snapshot
+qemu-img snapshot -l $DISK_IMAGE.qcow2 # List Snapshots
+#Snapshots also appear in the output of the qemu-img info command.
+qemu-img snapshot -c $SNAPSHOT_NAME $DISK_IMAGE #Create Snapshot
+qemu-img snapshot -a $SNAPSHOT_NAME $DISK_IMAGE #Restore (Apply) Snapshot
+qemu-img snapshot -d  $SNAPSHOT_NAME  $DISK_IMAGE #Delete Snapshot
+</code>
 ++++ Checkpoints increment backup|
 <code BASH>
@@ Line 69: / Line 98: @@
 </details>
 ````
+</code>
+++++
+++++ Whole libvirt hierarchy of path|
+<code BASH>
+# https://www.reddit.com/r/linuxquestions/comments/16kx0oi/how_do_i_change_libvirtqemuvirtmanager_s_xml/
+# path of libvirt
+/etc/libvirt/								Holds QEMU/Libvirt configurations files are.
+/etc/libvirt/hooks/							Holds your own scripts that would starts when a specific VM does.
+/etc/libvirt/nwfilter/						Looks like Libvirt has its own networking/firewall rules.
+/etc/libvirt/qemu/							Holds VMs' XMLs are stored.
+/etc/libvirt/qemu/networks/					Holds QEMU/Libvirt virtual networks' XMLs are.
+/etc/libvirt/qemu/networks/autostart/		A QEMU/Libvirt virtual network XML symlinked there will make said virtual network starts when QEMU/Libvirt does.
+/etc/libvirt/secrets/						???
+/etc/libvirt/storage/						Holds QEMU/Libvirt datastores/pool configurations files are.
+/etc/libvirt/storage/autostart/				A QEMU/Libvirt datastore/pool configuration file symlinked there will make said datastore/pool starts when QEMU/Libvirt does.
+/var/lib/libvirt/boot/						???
+/var/lib/libvirt/dnsmasq/					Holds further QEMU/Libvirt virtual networks' configuration files.
+/var/lib/libvirt/images/					Default QEMU/Libvirt virtual disks' datastore/pool.
+/var/lib/libvirt/qemu/						???
+/var/lib/libvirt/qemu/channel/				???
+/var/lib/libvirt/qemu/target/				???
+/var/lib/libvirt/qemu/checkpoint/			???
+/var/lib/libvirt/qemu/dump/					???
+/var/lib/libvirt/qemu/nvram/				Holds VMs' UEFI settings. Same goes for TPM and Secure Boot databases?
+/var/lib/libvirt/qemu/ram/					???
+/var/lib/libvirt/qemu/ram/libvirt/			???
+/var/lib/libvirt/qemu/libvirt/qemu/			???
+/var/lib/libvirt/qemu/save/					Looks like it holds VMs' saved states.
+/var/lib/libvirt/qemu/snapshot/				Looks like it's where VMs' snapshot are saved.
+/var/lib/libvirt/sanlock/					???
 </code>
 ++++