add virsh networking notes

active/software_virsh/dual-stack-dhcp.xml

@@ -2,9 +2,9 @@
   <name>dual-stack</name>
   <forward mode="nat"/>
   <domain name="dual-stack"/>
-  <ip address="192.168.100.1" netmask="255.255.255.0">
+  <ip address="192.168.123.1" netmask="255.255.255.0">
     <dhcp>
-      <range start="192.168.100.2" end="192.168.100.254"/>
+      <range start="192.168.123.2" end="192.168.123.99"/>
     </dhcp>
   </ip>
   <ip family="ipv6" address="fd4d:58e7:17f6:1::1" prefix="64"/>

active/software_virsh/virsh.md

@@ -8,6 +8,8 @@ Virtual Machine Management
   - [Virsh Networking](#virsh-networking)
     - [Create a Virtual Network](#create-a-virtual-network)
     - [Attach a New Virtual Network](#attach-a-new-virtual-network)
+    - [Detach a Virtual Network](#detach-a-virtual-network)
+    - [Destroy a Virtual Network](#destroy-a-virtual-network)
     - [Set a Static IP](#set-a-static-ip)
   - [Creating VMs](#creating-vms)
     - [Create VM with No Graphics and use an Existing QCOW2 Disk](#create-vm-with-no-graphics-and-use-an-existing-qcow2-disk)
@@ -56,10 +58,10 @@ virsh shutdown <domain>
 virsh destroy <domain>
 
 # Remove a VM
-virsh undefine <domain>
+virsh undefine --nvram <domain>
 
 # Remove a VM including storage
-virsh undefine <domain> --remove-all-storage
+virsh undefine <domain> --nvram --remove-all-storage
 ```
 
 ## Virsh Networking
@@ -118,27 +120,42 @@ virsh attach-interface \
 --domain ${VM_NAME}
 ```
 
+### Detach a Virtual Network
+
+```bash
+# List mac addresses of connected interfaces'
+export VM_NAME=my_vm
+virsh domiflist --domain $VM_NAME
+virsh detach-interface --domain k0s-worker0 --type bridge --mac "52:54:00:f6:b9:83" --live
+```
+
+### Destroy a Virtual Network
+
+```bash
+export NETWORK_NAME=mynetwork
+virsh net-undefine --network $NETWORK_NAME
+virsh net-destroy --network $NETWORK_NAME
+```
+
 ### Set a Static IP
 
 To set a static IP, run `virsh net-edit default` and add the following between `<dhcp>` and `</dhcp>`
 
-```xml
-<host mac='xx:xx:0x:xx:xx:1x' name='virtual_machine' ip='1xx.1xx.1xx.xx'/>
-```
-
-Then run
-
 ```bash
-# `--location /path/to/image.iso` supplies a disk installer. (Remove `--import`)
-# `--import` skips the installation process.
-# `--graphics spice --video qxl --channel spicevmc` installs graphics
-# `--console pty,target.type=virtio` adds a console connection
-# For any command, use `virt-install --arg=?` to see all available options
-virsh net-destroy default
-virsh net-start default
-virsh shutdown virtual_machine
-systemctl restart libvirtd
-virsh start virtual_machine
+# Add a host
+virsh net-update default add-last ip-dhcp-host \
+      '<host mac="52:54:00:6f:78:f3" ip="192.168.122.222"/>' \
+      --live --config --parent-index 0
+
+# Modify a host
+virsh net-update default modify ip-dhcp-host \
+      '<host mac="52:54:00:6f:78:f3" ip="192.168.122.222"/>' \
+      --live --config --parent-index 0
+
+# Delete a host
+virsh net-update default delete ip-dhcp-host \
+      '<host mac="52:54:00:6f:78:f3" ip="192.168.122.222"/>' \
+      --live --config --parent-index 0
 ```
 
 ## Creating VMs
@@ -153,7 +170,9 @@ installation process altogether.
 ```bash
 sudo systemctl start osbuild-composer.socket
 composer-cli compose list
-composer-cli compose image --filename /var/lib/libvirt/images/fedora-42-test.qcow2 image-uuid
+export IMAGE_UUID=
+export VM_DISK_PATH=/var/lib/libvirt/images/fedora43-test.qcow2
+composer-cli compose image --filename ${VM_DISK_PATH} ${IMAGE_UUID}
 ```
 
 ### Create VM with No Graphics and use an Existing QCOW2 Disk
@@ -162,17 +181,21 @@ composer-cli compose image --filename /var/lib/libvirt/images/fedora-42-test.qco
 # Start the  default network if it isn't already
 virsh net-start --network default
 
+export VM_NAME="fedora43-test"
+export VM_DISK_PATH=/var/lib/libvirt/images/fedora43-test.qcow2
+
+# OPTIONAL: export your qcow2 disk now if using osbuild
+export IMAGE_UUID=
+composer-cli compose image --filename ${VM_DISK_PATH} ${IMAGE_UUID}
+
+# Install
 # `--location /path/to/image.iso` supplies a disk installer. (Remove `--import`)
 # `--import` skips the installation process.
-# `--graphics spice --video qxl --channel spicevmc` installs graphics
+# `--graphics spice --video qxl,model.ram=131072,model.vram=131072,model.vgamem=131072 --channel spicevmc` installs graphics
 # `--console pty,target.type=virtio` adds a console connection
 # For any command, use `virt-install --arg=?` to see all available options
-export VM_NAME="fedora42-test"
-export VM_DESCRIPTION="Test VM with Fedora42"
-export VM_DISK_PATH="/var/lib/libvirt/images/fedora-42-test.qcow2"
 virt-install \
 --name "${VM_NAME}" \
---description "${DESCRIPTION}" \
 --boot uefi,firmware.feature0.name=secure-boot,firmware.feature0.enabled=no \
 --cpu host-passthrough --vcpus sockets=1,cores=8,threads=2 \
 --ram=8192 \
@@ -192,18 +215,16 @@ virt-install \
 # `--console pty,target.type=virtio` adds a console connection
 # For any command, use `virt-install --arg=?` to see all available options
 export VM_NAME="fedora43-kinoite-test"
-export VM_DESCRIPTION="Test VM with Fedora43 Kinoite"
-export VM_DISK_PATH="/var/lib/libvirt/images/fedora-43-kinoite.qcow2"
-export VM_ISO_PATH="/var/lib/libvirt/iso/Fedora-Kinoite-ostree-x86_64-43-1.6.iso"
+export VM_ISO_PATH=/var/lib/libvirt/iso/
+export VM_DISK_PATH=/var/lib/libvirt/images/
 virt-install \
 --name "${VM_NAME}" \
---description "${DESCRIPTION}" \
 --boot uefi,firmware.feature0.name=secure-boot,firmware.feature0.enabled=no \
 --cpu host-passthrough --vcpus sockets=1,cores=8,threads=2 \
 --ram=8192 \
 --os-variant=fedora41 \
 --network bridge:virbr0 \
---graphics spice --video qxl --channel spicevmc \
+--graphics spice --video virtio --channel spicevmc \
 --cdrom ${VM_ISO_PATH} \
 --disk "path=${VM_DISK_PATH},size=64,bus=virtio,format=qcow2"
 ```
@@ -218,10 +239,8 @@ virt-install \
 # `--hostdev 0x1234:0x5678` adds a block storage device
 # For any command, use `virt-install --arg=?` to see all available options
 export VM_NAME="usb-linux"
-export VM_DESCRIPTION="Linux running 0x13fe:0x6500 as the boot drive"
 virt-install \
 --name "${VM_NAME}" \
---description "${DESCRIPTION}" \
 --boot uefi,firmware.feature0.name=secure-boot,firmware.feature0.enabled=no \
 --import \
 --cpu host-passthrough --vcpus sockets=1,cores=8,threads=2 \