110 lines
3.1 KiB
Bash
Executable File
110 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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# Creates a new virtual machine from the given stage4 tarball
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DOMNAME="$1"
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STAGE_TBZ="$2"
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VMNAME=$(echo "${DOMNAME}" | tr '[:upper:]' '[:lower:]')
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VM_FQDN="${VMNAME}.$(hostname -d)"
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if [[ -z $STAGE_TBZ || -z $VMNAME ]]; then
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echo "Usage: $(basename $0) <vmname> <stage4-tarball>" >&2
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exit 2
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fi
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: ${VG:=vmachines}
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: ${POOL:=LVM}
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: ${DOMXML_TMPL:=/etc/libvirt/qemu/_template.xml}
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: ${MOUNTPOINT:=/mnt/new_vmachine}
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: ${PORTAGE_PROFILE:="default/linux/amd64/13.0"}
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while [[ -z ${VM_ROOTPW} ]]; do
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read -sp 'New VM root password: ' VM_ROOTPW
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echo
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read -sp 'Confirm root password: ' confirm_rootpw
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echo
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if [[ ${VM_ROOTPW} != ${confirm_rootpw} ]]; then
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echo "Passwords don't match" >&2
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unset VM_ROOTPW
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fi
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done
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set -e
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PORTDIR=$(portageq envvar PORTDIR)
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DISTDIR=$(portageq envvar DISTDIR)
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PKGDIR=$(portageq envvar PKGDIR)
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if lvdisplay ${VG}/${VMNAME} >/dev/null 2>&1; then
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echo "ERROR: Logical volume ${VMNAME} already exists in group ${VG}" >&2
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exit 1
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fi
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echo "Creating storage volume..."
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virsh -c qemu:///system vol-create-as ${POOL} ${VMNAME} 2G
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echo "Creating LVM volumes..."
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pvcreate /dev/${VG}/${VMNAME}
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vgcreate ${VMNAME} /dev/${VG}/${VMNAME}
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lvcreate -nroot -L100M ${VMNAME}
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lvcreate -nhome -L200M ${VMNAME}
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lvcreate -nvar -L400M ${VMNAME}
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lvcreate -nusr -l100%FREE ${VMNAME}
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echo "Creating XFS filesystems..."
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for fs in root home usr var; do
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mkfs.xfs -L$fs -q /dev/${VMNAME}/$fs
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done
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echo "Mounting filesystems..."
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[[ ! -d "${MOUNTPOINT}" ]] && mkdir -p "${MOUNTPOINT}"
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mount /dev/${VMNAME}/root "${MOUNTPOINT}"
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for fs in home usr var; do
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mkdir "${MOUNTPOINT}"/$fs
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mount /dev/${VMNAME}/$fs "${MOUNTPOINT}"/$fs
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done
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mkdir "${MOUNTPOINT}"/run
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mount -t tmpfs tmpfs "${MOUNTPOINT}"/run
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echo "Extracting stage tarball..."
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tar -xjpf "${STAGE_TBZ}" -C "${MOUNTPOINT}"
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echo "Setting hostname..."
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sed -i "s/localhost/${VMNAME}/" "${MOUNTPOINT}"/etc/conf.d/hostname
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echo "Configuring network..."
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echo 'config_eth0="dhcp"' > "${MOUNTPOINT}"/etc/conf.d/net
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ln -s net.lo "${MOUNTPOINT}"/etc/init.d/net.eth0
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ln -s /etc/init.d/net.eth0 "${MOUNTPOINT}"/etc/runlevels/default/
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chroot "${MOUNTPOINT}" /etc/init.d/sshd gen_keys
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echo "Configuring fstab..."
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cat << EOF > "${MOUNTPOINT}"/etc/fstab
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LABEL=root / xfs ro,noatime 0 1
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LABEL=usr /usr xfs ro,noatime 0 2
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LABEL=var /var xfs noatime 0 2
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LABEL=home /home xfs noatime 0 2
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tmpfs /tmp tmpfs defaults 0 0
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EOF
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echo "Creating read-only root filesystem compatibility symlinks..."
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rm -f "${MOUNTPOINT}"/etc/{resolv,ntp}.conf
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rm -f "${MOUNTPOINT}"/etc/mtab
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ln -s /proc/mounts "${MOUNTPOINT}"/etc/mtab
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ln -s /run/resolv.conf "${MOUNTPOINT}"/etc/resolv.conf
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ln -s /run/ntp.conf "${MOUNTPOINT}"/etc/ntp.conf
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echo "Setting root password..."
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echo "root:${VM_ROOTPW}" | chroot "${MOUNTPOINT}" chpasswd
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echo "Enabling serial console..."
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sed -i 's/#s0/s0/' "${MOUNTPOINT}"/etc/inittab
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echo "Cleaning up..."
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umount "${MOUNTPOINT}"/{run,usr,var,home,}
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vgchange -an ${VMNAME}
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echo "Creating libvirt domain..."
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virsh -c qemu:///system define <(m4 -P -DNAME="${DOMNAME}" "${DOMXML_TMPL}")
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echo "Starting virtual machine..."
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virsh -c qemu:///system start ${DOMNAME}
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