Create LIBVIRT_X86_64_ALMALINUX_CLOUD_IMAGE_MANUAL.md

Author: taylorific

almalinux/cloud/docs/LIBVIRT_X86_64_ALMALINUX_CLOUD_IMAGE_MANUAL.md

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+https://wiki.almalinux.org/cloud/Generic-cloud.html#download-images
+
+https://github.com/AlmaLinux/cloud-images
+
+```
+$ curl -LO https://repo.almalinux.org/almalinux/9/cloud/x86_64/images/CHECKSUM
+$ curl -LO https://repo.almalinux.org/almalinux/9/cloud/x86_64/images/AlmaLinux-9-GenericCloud-latest.x86_64.qcow2
+
+$ qemu-img info AlmaLinux-9-GenericCloud-latest.x86_64.qcow2
+
+$ sudo qemu-img convert \
+    -f qcow2 \
+    -O qcow2 \
+    AlmaLinux-9-GenericCloud-latest.x86_64.qcow2 \
+    /var/lib/libvirt/images/almalinux-9.qcow2
+$ sudo qemu-img resize \
+    -f qcow2 \
+    /var/lib/libvirt/images/almalinux-9.qcow2 \
+    32G
+```
+
+```
+touch network-config
+
+cat >meta-data <<EOF
+instance-id: almalinux-9
+local-hostname: almalinux-9
+EOF
+
+cat >user-data <<EOF
+#cloud-config
+password: superseekret
+chpasswd:
+  expire: False
+ssh_pwauth: True
+EOF
+```
+
+```
+sudo apt-get update
+sudo apt-get install genisoimage
+genisoimage \
+    -input-charset utf-8 \
+    -output almalinux-9-cloud-init.img \
+    -volid cidata -rational-rock -joliet \
+    user-data meta-data network-config
+sudo cp almalinux-9-cloud-init.img \
+  /var/lib/libvirt/boot/almalinux-9-cloud-init.iso
+```
+
+```
+$ sudo apt-get install libosinfo-bin
+$ osinfo-query os
+```
+
+```
+virt-install \
+  --connect qemu:///system \
+  --name almalinux-9 \
+  --boot uefi \
+  --memory 4096 \
+  --vcpus 2 \
+  --os-variant almalinux9 \
+  --disk /var/lib/libvirt/images/almalinux-9.qcow2,bus=virtio \
+  --disk /var/lib/libvirt/boot/almalinux-9-cloud-init.iso,device=cdrom \
+  --network network=default,model=virtio \
+  --graphics spice \
+  --noautoconsole \
+  --console pty,target_type=serial \
+  --import \
+  --debug
+
+virsh console almalinux-9
+
+# login with almalinux user
+
+$ cloud-init status --wait
+status: done
+
+# Verify networking is working
+$ ip -br a
+
+# If networking isn't correct, regenerate only the network config
+$ sudo cloud-init clean --configs network
+$ sudo cloud-init init --local
+
+# Disable cloud-init
+$ sudo touch /etc/cloud/cloud-init.disabled
+
+$ cloud-init status
+status: disabled
+
+$ sudo shutdown -h now
+
+$ virsh domblklist almalinux-9
+ Target   Source
+------------------------------------------------------------
+ vda      /var/lib/libvirt/images/almalinux-9.qcow2
+ sda      /var/lib/libvirt/boot/almalinux-9-cloud-init.iso
+ 
+$ virsh change-media almalinux-9 sda --eject
+Successfully ejected media.
+
+$ sudo rm /var/lib/libvirt/boot/almalinux-9-cloud-init.iso
+
+# Verify image boots without cloud-init iso being mounted
+```
+
+```
+$ virsh snapshot-create-as --domain almalinux-9 --name clean --description "Initial install"
+$ virsh snapshot-list almalinux-9
+$ virsh snapshot-revert almalinux-9 clean
+$ virsh snapshot-delete almalinux-9 clean
+
+$ virsh shutdown almalinux-9
+$ virsh undefine almalinux-9 --nvram --remove-all-storage
+```