script to create base domain

salt/libvirt/scripts/createvm.sh

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+#!/bin/bash
+
+# Exit on any error
+set -e
+
+# Set variables and defaults
+VM=${1:-"small-vm"}          # VM name
+IP=${2:-"192.168.1.10"}      # IP address
+GATEWAY=${3:-"192.168.1.1"}  # Gateway
+DNS=${4:-"192.168.1.1"}      # Comma-separated list of DNS servers
+MAC_ADDRESS="52:54:00:f2:c3:df"  # Default MAC - will be overridden if found
+
+# Show usage if help is requested
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+    echo "Usage: $0 <vm_name> <ip> <gateway> <dns_servers>"
+    echo "Example: $0 myvm 192.168.1.50 192.168.1.1 8.8.8.8,8.8.4.4"
+    echo "All parameters are optional and will use defaults if not specified"
+    exit 0
+fi
+
+# Convert comma-separated DNS servers to yaml format
+format_dns() {
+    local IFS=','
+    local dns_list=($1)
+    local yaml=""
+    for dns in "${dns_list[@]}"; do
+        yaml="$yaml                    - $dns"$'\n'
+    done
+    echo "$yaml"
+}
+
+DNS_YAML=$(format_dns "$DNS")
+
+# Set up directory structure
+D=/root/create_vm/var/lib/libvirt/images
+mkdir -vp $D/$VM
+cd $D/$VM
+
+# Create cloud-init metadata
+cat > meta-data << EOF
+instance-id: ${VM}
+local-hostname: ${VM}
+EOF
+
+# Create network configuration
+cat > network-config << EOF
+version: 2
+ethernets:
+    eth0:
+        match:
+            macaddress: ${MAC_ADDRESS}
+        dhcp4: false
+        dhcp6: false
+        addresses:
+            - ${IP}/24
+        routes:
+            - to: 0.0.0.0/0
+              via: ${GATEWAY}
+        nameservers:
+            addresses:
+$(format_dns "$DNS")
+EOF
+
+# Generate password hash using: 
+# Create passwd hash
+### python3 -c 'import crypt; print(crypt.crypt("YOUR_PASSWD_HERE", crypt.mksalt(crypt.METHOD_SHA512)))'
+# Create ssh keypair
+### ssh-keygen -t ed25519 -C "soqemussh" -f ~/.ssh/soqemussh
+
+# Create user-data with network configuration
+cat > user-data << EOF
+#cloud-config
+preserve_hostname: False
+hostname: ${VM}
+fqdn: ${VM}.local
+
+users:
+    - default
+    - name: soqemussh
+      groups: ['wheel']
+      shell: /bin/bash
+      sudo: ALL=(ALL) NOPASSWD:ALL
+      lock_passwd: false
+      passwd: $(echo '___YOUR_HASH_HERE___')
+      ssh-authorized-keys:
+        - ssh-ed25519 ___YOUR_PUB_KEY_HERE___
+
+# Configure where output will go
+output:
+  all: ">> /var/log/cloud-init.log"
+
+# configure interaction with ssh server
+ssh_genkeytypes: ['ed25519', 'rsa']
+
+# set timezone for VM
+timezone: UTC
+
+# Don't preallocate the entire disk space
+#resize_rootfs: true
+#growpart:
+#    mode: auto
+#    devices: ['/']
+
+# Install QEMU guest agent. Enable and start the service
+packages:
+  - qemu-guest-agent
+
+runcmd:
+  - systemctl enable --now qemu-guest-agent
+  - systemctl enable --now serial-getty@ttyS0.service
+  - systemctl enable --now NetworkManager
+  - growpart /dev/vda 2
+  - pvresize /dev/vda2
+  - lvextend -l +100%FREE /dev/vg_main/lv_root
+  - xfs_growfs /dev/vg_main/lv_root
+EOF
+
+# First, copy the base image
+echo "Creating base VM image..."
+cp -v /root/create_vm/OL9U5_x86_64-kvm-b253.qcow2 $VM.qcow2
+
+# First resize the image to our desired size
+echo "Resizing image..."
+qemu-img resize $VM.qcow2 205G
+
+# Now compress it
+echo "Compressing image..."
+qemu-img convert -p -O qcow2 -c $VM.qcow2 $VM-compressed.qcow2
+mv -v $VM-compressed.qcow2 $VM.qcow2
+
+# Create a cloud-init ISO with network config
+echo "Creating cloud-init ISO..."
+mkisofs -output $VM-cidata.iso -volid CIDATA -rock user-data meta-data network-config
+
+# Echo the configuration for verification
+echo "Creating VM with the following network configuration:"
+echo "VM Name: $VM"
+echo "IP Address: $IP"
+echo "Gateway: $GATEWAY"
+echo "DNS Servers: $DNS"
+echo "MAC Address: $MAC_ADDRESS"
+
+echo "Files have been created in $D/$VM"
+echo
+echo "To complete VM creation on the hypervisor, run:"
+echo "virsh pool-create-as --name $VM --type dir --target $D/$VM"
+echo "virt-install --import --name ${VM} \\"
+echo "    --memory 4096 --vcpus 4 --cpu host \\"
+echo "    --disk ${VM}.qcow2,format=qcow2,bus=virtio \\"
+echo "    --disk ${VM}-cidata.iso,device=cdrom \\"
+echo "    --network bridge=br0,model=virtio,mac=${MAC_ADDRESS} \\"
+echo "    --os-variant=ol9.5 \\"
+echo "    --noautoconsole"