mirror of
https://github.com/Security-Onion-Solutions/securityonion.git
synced 2025-12-06 17:22:49 +01:00
191 lines
6.2 KiB
Bash
191 lines
6.2 KiB
Bash
#!/bin/bash
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# Ensure /root/create_vm/var/lib/libvirt/images exists
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# Place this script in /root/create_vm
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# Download OL9U5_x86_64-kvm-b253.qcow2 from https://yum.oracle.com/oracle-linux-templates.html, place in /root/create_vm/
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# These steps will be removed from the process to create the final image and is being used for development
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# This is used for the user-data auth portion of cloud-init
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# Create passwd hash:
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# python3 -c 'import crypt; print(crypt.crypt("YOUR_PASSWD_HERE", crypt.mksalt(crypt.METHOD_SHA512)))'
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# Create ssh keypair:
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# ssh-keygen -t ed25519 -C "soqemussh" -f ~/.ssh/soqemussh
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# Run the script: createvm.sh coreol9Small 205G
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# IP options may be removed for final version
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# After running the script, the following will be output:
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#[root@jppvirtman create_vm]# ll var/lib/libvirt/images/coreol9Small/
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#total 610376
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#-rw-r--r--. 1 root root 380928 Dec 20 14:33 coreol9Small-cidata.iso
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#-rw-r--r--. 1 root root 624623616 Dec 20 14:33 coreol9Small.qcow2
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#-rw-r--r--. 1 root root 55 Dec 20 14:32 meta-data
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#-rw-r--r--. 1 root root 333 Dec 20 14:32 network-config
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#-rw-r--r--. 1 root root 1047 Dec 20 14:32 user-data
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# These files are now scp to a hypervisor node
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# Place the files in /var/lib/libvirt/images/coreol9Small (or whatever is the same as the vm name)
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# Create your storage pool as instructed by the script. this is only needed if one doesn't already exist
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# Run the virt-install command as instructed by the script
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# Could add the following to the final runcmd in the user-data to fill the disk to avoid the cons of thin provisioning the disk
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# - dd if=/dev/zero of=/tmp/fill bs=1M || true
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# - rm -f /tmp/fill
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# Exit on any error
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set -e
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# Set variables and defaults
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VM=${1:-"small-vm"} # VM name
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DISK_SIZE=${2:-"205G"} # Disk size with unit (default 205G)
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IP=${3:-"192.168.1.10"} # IP address
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GATEWAY=${4:-"192.168.1.1"} # Gateway
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DNS=${5:-"192.168.1.1"} # Comma-separated list of DNS servers
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MAC_ADDRESS="52:54:00:f2:c3:df" # Default MAC - will be overridden if found
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# Show usage if help is requested
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if [[ "$1" == "-h" || "$1" == "--help" ]]; then
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echo "Usage: $0 <vm_name> <disk_size> <ip> <gateway> <dns_servers>"
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echo "Example: $0 myvm 100G 192.168.1.50 192.168.1.1 8.8.8.8,8.8.4.4"
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echo "Parameters:"
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echo " vm_name : Name of the VM (default: small-vm)"
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echo " disk_size : Size of the disk with unit G/M (default: 205G)"
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echo " ip : IP address (default: 192.168.1.10)"
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echo " gateway : Gateway address (default: 192.168.1.1)"
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echo " dns_servers: Comma-separated DNS servers (default: 192.168.1.1)"
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echo "All parameters are optional and will use defaults if not specified"
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exit 0
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fi
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# Validate disk size format
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if ! [[ $DISK_SIZE =~ ^[0-9]+[GM]$ ]]; then
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echo "Error: Disk size must be a number followed by G (gigabytes) or M (megabytes)"
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echo "Example: 100G or 51200M"
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exit 1
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fi
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# Convert comma-separated DNS servers to yaml format
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format_dns() {
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local IFS=','
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local dns_list=($1)
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local yaml=""
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for dns in "${dns_list[@]}"; do
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yaml="$yaml - $dns"$'\n'
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done
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echo "$yaml"
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}
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DNS_YAML=$(format_dns "$DNS")
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# Set up directory structure
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D=/root/create_vm/var/lib/libvirt/images
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mkdir -vp $D/$VM
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cd $D/$VM
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# Create cloud-init metadata
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cat > meta-data << EOF
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instance-id: ${VM}
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local-hostname: ${VM}
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EOF
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# Create network configuration
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cat > network-config << EOF
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version: 2
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ethernets:
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eth0:
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match:
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macaddress: ${MAC_ADDRESS}
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dhcp4: false
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dhcp6: false
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addresses:
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- ${IP}/24
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routes:
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- to: 0.0.0.0/0
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via: ${GATEWAY}
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nameservers:
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addresses:
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$(format_dns "$DNS")
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EOF
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# Create user-data with network configuration
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cat > user-data << EOF
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#cloud-config
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preserve_hostname: False
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hostname: ${VM}
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fqdn: ${VM}.local
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users:
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- default
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- name: soqemussh
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groups: ['wheel']
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shell: /bin/bash
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sudo: ALL=(ALL) NOPASSWD:ALL
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lock_passwd: false
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passwd: $(echo '___YOUR_HASH_HERE___')
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ssh-authorized-keys:
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- ssh-ed25519 ___YOUR_PUB_KEY_HERE___ soqemussh
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# Configure where output will go
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output:
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all: ">> /var/log/cloud-init.log"
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# configure interaction with ssh server
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ssh_genkeytypes: ['ed25519', 'rsa']
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# set timezone for VM
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timezone: UTC
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# Install QEMU guest agent. Enable and start the service
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packages:
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- qemu-guest-agent
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runcmd:
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- systemctl enable --now qemu-guest-agent
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- systemctl enable --now serial-getty@ttyS0.service
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- systemctl enable --now NetworkManager
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- growpart /dev/vda 2
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- pvresize /dev/vda2
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- lvextend -l +100%FREE /dev/vg_main/lv_root
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- xfs_growfs /dev/vg_main/lv_root
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EOF
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# First, copy the base image with progress
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echo "Creating base VM image..."
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rsync --progress /root/create_vm/OL9U5_x86_64-kvm-b253.qcow2 $VM.qcow2
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# Resize the image to specified size
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echo "Resizing image to $DISK_SIZE..."
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echo "Current image size: $(qemu-img info $VM.qcow2 | grep 'virtual size' | cut -d':' -f2 | cut -d'(' -f1 | tr -d ' ')"
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qemu-img resize -f qcow2 $VM.qcow2 $DISK_SIZE
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echo "New image size: $(qemu-img info $VM.qcow2 | grep 'virtual size' | cut -d':' -f2 | cut -d'(' -f1 | tr -d ' ')"
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# Now compress it with progress
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echo "Compressing image..."
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qemu-img convert -p -O qcow2 -c $VM.qcow2 $VM-compressed.qcow2
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mv -v $VM-compressed.qcow2 $VM.qcow2
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# Create a cloud-init ISO with network config and progress indication
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echo "Creating cloud-init ISO..."
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mkisofs -output $VM-cidata.iso -volid CIDATA -rock -verbose user-data meta-data network-config
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# Echo the configuration for verification
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echo "Creating VM with the following configuration:"
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echo "VM Name: $VM"
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echo "Disk Size: $DISK_SIZE"
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echo "IP Address: $IP"
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echo "Gateway: $GATEWAY"
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echo "DNS Servers: $DNS"
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echo "MAC Address: $MAC_ADDRESS"
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echo "Files have been created in $D/$VM"
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echo
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echo "To complete VM creation on the hypervisor, run:"
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echo "virsh pool-create-as --name $VM --type dir --target $D/$VM"
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echo "virt-install --import --name ${VM} \\"
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echo " --memory 4096 --vcpus 4 --cpu host \\"
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echo " --disk ${VM}.qcow2,format=qcow2,bus=virtio \\"
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echo " --disk ${VM}-cidata.iso,device=cdrom \\"
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echo " --network bridge=br0,model=virtio,mac=${MAC_ADDRESS} \\"
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echo " --os-variant=ol9.5 \\"
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echo " --noautoconsole"
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