Sebastian Kippe
52d7fe52e5
The base image is used as backing image for the VM images, so overwriting it results in corrupt data after VM reboots.
91 lines
2.9 KiB
Plaintext
91 lines
2.9 KiB
Plaintext
#!/bin/bash
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set -e
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if [[ $# -lt 3 ]] ; then
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cat <<-EOF
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USAGE (RAM in megabytes)
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create_vm VMNAME RAM CPUS DISKSIZE
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EOF
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exit 1
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fi
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VMNAME=$1
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RAM=$2
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CPUS=$3
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DISKSIZE=${4:-10} # 10GB default
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# Directory where image files will be stored
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IMAGE_DIR=/var/lib/libvirt/images
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IMAGE_PATH=$IMAGE_DIR/${VMNAME}.qcow2
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CIDATA_PATH=${IMAGE_DIR}/cidata-${VMNAME}.iso
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BASE_FILE=<%= @base_image_path %>
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# Create the VM image if it does not already exist
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if [ ! -f "$IMAGE_PATH" ]; then
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echo "info: image file $IMAGE_PATH not found. creating new image"
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# Important: -F qcow2 is required to set the image format
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qemu-img create -b "$BASE_FILE" -f qcow2 -F qcow2 "$IMAGE_PATH" ${DISKSIZE}G
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chmod 600 "$IMAGE_PATH"
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if [ $? -ne 0 ]; then
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echo "error: failed to create image"
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exit 1
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fi
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fi
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# Dump the image info
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qemu-img info "$IMAGE_PATH"
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# Check if the cloud-init metadata file exists
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# if not, generate it
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if [ ! -r $CIDATA_PATH ]; then
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pushd $(dirname $CIDATA_PATH)
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mkdir -p $VMNAME
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cd $VMNAME
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cat > user-data <<-EOS
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#cloud-config
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ssh_authorized_keys:
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- ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCw0I82gT8R4tpsqWGovLyjm2SR2F863MqNz224h3h/wl0xA5Eu0eRro+ELLv2hoebqQbcMsb89X5+7ObhDRar+b7tzDlXq4x+ECkAy6WbDSmBp3kNVd7muT4c9Zw7UxKsIvIm1ven1TkJ3UG80o6PyGiAUlBj4puIQwhp7OVknVutBBe8Rpp4f6BEuWluwpnPxc3KSaGhhr9p10xeX69cfspH40r8vHpI0zp19O5GpfYSOEH64UbwRpN2QypNB8ISmDHFsNGwdz0Ba4qrEOSGU9GveyOcsvEtt630/0fHqtbPBovOYu/FJISQZya2tofDig4EngBCJNfsPCbXFHtlp greg@karekinian.com
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- ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDDyUDR7ZE6HWmjvlfKrG8Ci+q5E4adbyboKvyYVkUXaTYt+DgisPPAqfGkd0yAHgVnmOS/3f5c3D6RrIXcxFmzwpV2BtmGZztBnEYvC5q8XPQhmu6AFl6ZDjh9XzUeO52py8tt5ZJ9W1R2ob/rlgX8txNHi6XwzuvPxZ7NR/iNup7cruBzkHABhwTvTfwaErufr6eNmNjh5VatNTei1ld6yWtmvbYJqJlpq6YyPu9vYNYPg0AB7I+OqOJhzHXhelY28GSP9KF3GDcHDtN1bV21g9+COcdKhMShQaw1WIkfQKdiuFictZIOCP0/uYSiFhyyoSvISiC3eT8zIimRbDRj basti@skddc.local
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runcmd:
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# Enable serial console (for virsh)
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- systemctl enable serial-getty@ttyS0.service && systemctl start serial-getty@ttyS0.service
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- curl -s 'https://raw.githubusercontent.com/zerotier/ZeroTierOne/master/doc/contact%40zerotier.com.gpg' | gpg --import
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- curl -s -o /tmp/install_zerotier 'https://install.zerotier.com/'
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- cat /tmp/install_zerotier | gpg && bash /tmp/install_zerotier
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- zerotier-cli join 8541e5153eb4327c
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EOS
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cat > meta-data <<-EOS
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instance-id: $VMNAME
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local-hostname: $VMNAME
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EOS
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genisoimage -output "$CIDATA_PATH" -volid cidata -joliet -rock user-data meta-data
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chown libvirt-qemu:kvm "$CIDATA_PATH"
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chmod 600 "$CIDATA_PATH"
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popd
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fi
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# setting --os-variant to ubuntu20.04 and ubuntu18.04 breaks SSH and networking
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virt-install \
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--name "$VMNAME" \
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--ram "$RAM" \
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--vcpus "$CPUS" \
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--cpu host \
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--arch x86_64 \
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--os-type linux \
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--os-variant ubuntu16.04 \
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--hvm \
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--virt-type kvm \
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--disk "$IMAGE_PATH" \
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--cdrom "$CIDATA_PATH" \
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--boot hd \
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--network=bridge=virbr0,model=virtio \
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--graphics none \
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--serial pty \
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--console pty \
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--autostart \
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--import
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