Differences

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--- public:managing_kvm_on_debian [2024/05/07 21:13] – [Creating a network bridge] thomas
+++ public:managing_kvm_on_debian [2024/05/17 20:56] (current) – thomas
@@ Line 6: / Line 6: @@
 <code>
-sudo apt install --no-install-recommends qemu-system libvirt-clients libvirt-daemon-system virtinst qemu-utils dnsmasq swtpm swtpm-tools ovmf bridge-utils
+sudo apt install --no-install-recommends qemu-system libvirt-clients libvirt-daemon-system virtinst qemu-utils dnsmasq swtpm swtpm-tools ovmf bridge-utils libvirt-daemon-driver-storage-zfs
 </code>
@@ Line 46: / Line 46: @@
 </pool>
 </code>
+You can also use a ZFS dataset as storage pool, with this alternative XML configuration:
+<code>
+<pool type="zfs">
+  <name>default</name>
+  <source>
+    <name>pool1/kvm</name>
+  </source>
+</pool>
+</code>
+:!: Note that this does not support libvirt snapshots. You will need to make snapshots via ZFS manually, which may not be ideal.
 Then, create the pool based on the definition and make sure it autostarts:
@@ Line 133: / Line 146: @@
 </code>
-Then, define it with ''virsh'':
+Then, define it with ''virsh'' and make sure it is started:
 <code>
 virsh net-define bridged.xml
+virsh net-autostart bridged
+virsh net-start bridged
 </code>
@@ Line 154: / Line 169: @@
 <code>
-virt-install --network bridged [...]
+virt-install --network network=bridged [...]
 </code>
@@ Line 170: / Line 185: @@
 --graphics vnc,listen=0.0.0.0,password=foobar --noautoconsole \
 --disk size=50 --memory 4096
+--network network=bridged
 </code>
-You can then connect with a VNC client to the host to perform the installation.
+You can then connect with a VNC client to the host to perform the installation. The recommended client is [[https://tigervnc.org/|TigerVNC]], as it natively supports a protocol extension that maps the keyboard correctly by default.
 Some useful options:
   * ''--tpm backend.type=emulator,backend.version=2.0,model=tpm-tis'': To set a virtual TPM.
-More examples can be found in [[public:virt-install_examples|this article]].
+More examples can be found in [[public:virt-install_examples|this article]]. If you want to find out what os-variants are possible, you can list them as follows:
+<code>
+apt install libosinfo-bin
+osinfo-query os
+</code>
 ===== Listing running VMs =====
@@ Line 191: / Line 212: @@
 </code>
-===== Forcing a VM to stop =====
+If the server had NVRAM enabled, you must specify the ''nvram'' option to delete it without errors:
 <code>
-virsh destroy windows-server-2022
+virsh undefine windows-server-2022 --nvram
+</code>
+===== Stopping a guest =====
+This will ask a VM to shut down:
+<code>
+virsh shutdown <name>
+</code>
+This will force a VM to shut down:
+<code>
+virsh destroy <name>
 </code>
 ===== Editing a VM's XML configuration =====
@@ Line 202: / Line 235: @@
 </code>
+===== Finding the VNC display for a guest =====
+<code>
+virsh vncdisplay <name>
+</code>
+or
+<code>
+virsh domdisplay <name>
+</code>
+This snippet will list out the displays for all guests:
+<code>
+for dom in $(virsh list --name); do echo -n "$dom: "; virsh domdisplay $dom; done
+</code>
+===== Managing media =====
+Listing attached media:
+<code>
+virsh domblklist <guestname>
+</code>
+To replace a disk or cd-rom with another:
+<code>
+virsh change-media <guestname> /path/to/current/disk.img /path/to/new/disk.img
+</code>
+Or to simply eject a disk:
+<code>
+virsh change-media vm1 hdc --eject
+</code>
 ===== Resources =====
@@ Line 207: / Line 277: @@
   * http://thomasmullaly.com/2014/11/16/the-list-of-os-variants-in-kvm/
   * https://libvirt.org
+  * https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/
+  * https://serverfault.com/questions/334199/how-to-find-which-screen-and-thus-port-the-vnc-ui-for-a-kvm-guest-has-or-how