release/tools/vmimage.subr

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5 #
   6 # Common functions for virtual machine image build scripts.
   7 #
   8
   9 export PATH="/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
  10 trap "cleanup" INT QUIT TRAP ABRT TERM
  11
  12 write_partition_layout() {
  13         if [ -z "${NOSWAP}" ]; then
  14                 SWAPOPT="-p freebsd-swap/swapfs::${SWAPSIZE}"
  15         fi
  16
  17         BOOTFILES="$(env TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} \
  18                 WITH_UNIFIED_OBJDIR=yes \
  19                 make -C ${WORLDDIR}/stand -V .OBJDIR)"
  20         BOOTFILES="$(realpath ${BOOTFILES})"
  21
  22         case "${TARGET}:${TARGET_ARCH}" in
  23                 amd64:amd64 | i386:i386)
  24                         mkimg -s gpt -f ${VMFORMAT} \
  25                                 -b ${BOOTFILES}/i386/pmbr/pmbr \
  26                                 -p freebsd-boot/bootfs:=${BOOTFILES}/i386/gptboot/gptboot \
  27                                 ${SWAPOPT} \
  28                                 -p freebsd-ufs/rootfs:=${VMBASE} \
  29                                 -o ${VMIMAGE}
  30                         ;;
  31                 arm64:aarch64)
  32                         mkimg -s mbr -f ${VMFORMAT} \
  33                                 -p efi:=${BOOTFILES}/efi/boot1/boot1.efifat \
  34                                 -p freebsd:=${VMBASE} \
  35                                 -o ${VMIMAGE}
  36                         ;;
  37                 powerpc:powerpc*)
  38                         mkimg -s apm -f ${VMFORMAT} \
  39                                 -p apple-boot/bootfs:=${BOOTFILES}/powerpc/boot1.chrp/boot1.hfs \
  40                                 ${SWAPOPT} \
  41                                 -p freebsd-ufs/rootfs:=${VMBASE} \
  42                                 -o ${VMIMAGE}
  43                         ;;
  44                 *)
  45                         # ENOTSUPP
  46                         return 1
  47                         ;;
  48         esac
  49
  50         return 0
  51 }
  52
  53 err() {
  54         printf "${@}\n"
  55         cleanup
  56         return 1
  57 }
  58
  59 cleanup() {
  60         if [ -c "${DESTDIR}/dev/null" ]; then
  61                 umount_loop ${DESTDIR}/dev 2>/dev/null
  62         fi
  63         umount_loop ${DESTDIR}
  64         if [ ! -z "${mddev}" ]; then
  65                 mdconfig -d -u ${mddev}
  66         fi
  67
  68         return 0
  69 }
  70
  71 vm_create_base() {
  72         # Creates the UFS root filesystem for the virtual machine disk,
  73         # written to the formatted disk image with mkimg(1).
  74
  75         mkdir -p ${DESTDIR}
  76         truncate -s ${VMSIZE} ${VMBASE}
  77         mddev=$(mdconfig -f ${VMBASE})
  78         newfs -L rootfs /dev/${mddev}
  79         mount /dev/${mddev} ${DESTDIR}
  80
  81         return 0
  82 }
  83
  84 vm_copy_base() {
  85         # Creates a new UFS root filesystem and copies the contents of the
  86         # current root filesystem into it.  This produces a "clean" disk
  87         # image without any remnants of files which were created temporarily
  88         # during image-creation and have since been deleted (e.g., downloaded
  89         # package archives).
  90
  91         mkdir -p ${DESTDIR}/old
  92         mdold=$(mdconfig -f ${VMBASE})
  93         mount /dev/${mdold} ${DESTDIR}/old
  94
  95         truncate -s ${VMSIZE} ${VMBASE}.tmp
  96         mkdir -p ${DESTDIR}/new
  97         mdnew=$(mdconfig -f ${VMBASE}.tmp)
  98         newfs -L rootfs /dev/${mdnew}
  99         mount /dev/${mdnew} ${DESTDIR}/new
 100
 101         tar -cf- -C ${DESTDIR}/old . | tar -xUf- -C ${DESTDIR}/new
 102
 103         umount_loop /dev/${mdold}
 104         rmdir ${DESTDIR}/old
 105         mdconfig -d -u ${mdold}
 106
 107         umount_loop /dev/${mdnew}
 108         rmdir ${DESTDIR}/new
 109         tunefs -n enable /dev/${mdnew}
 110         mdconfig -d -u ${mdnew}
 111         mv ${VMBASE}.tmp ${VMBASE}
 112 }
 113
 114 vm_install_base() {
 115         # Installs the FreeBSD userland/kernel to the virtual machine disk.
 116
 117         cd ${WORLDDIR} && \
 118                 make DESTDIR=${DESTDIR} \
 119                 installworld installkernel distribution || \
 120                 err "\n\nCannot install the base system to ${DESTDIR}."
 121
 122         # Bootstrap etcupdate(8) and mergemaster(8) databases.
 123         mkdir -p ${DESTDIR}/var/db/etcupdate
 124         etcupdate extract -B \
 125                 -M "TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH}" \
 126                 -s ${WORLDDIR} -d ${DESTDIR}/var/db/etcupdate
 127         sh ${WORLDDIR}/release/scripts/mm-mtree.sh -m ${WORLDDIR} \
 128                 -F "TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH}" \
 129                 -D ${DESTDIR}
 130
 131         echo '# Custom /etc/fstab for FreeBSD VM images' \
 132                 > ${DESTDIR}/etc/fstab
 133         echo "/dev/${ROOTLABEL}/rootfs   /       ufs     rw      1       1" \
 134                 >> ${DESTDIR}/etc/fstab
 135         if [ -z "${NOSWAP}" ]; then
 136                 echo '/dev/gpt/swapfs  none    swap    sw      0       0' \
 137                         >> ${DESTDIR}/etc/fstab
 138         fi
 139
 140         local hostname
 141         hostname="$(echo $(uname -o) | tr '[:upper:]' '[:lower:]')"
 142         echo "hostname=\"${hostname}\"" >> ${DESTDIR}/etc/rc.conf
 143
 144         mkdir -p ${DESTDIR}/dev
 145         mount -t devfs devfs ${DESTDIR}/dev
 146         chroot ${DESTDIR} /usr/bin/newaliases
 147         chroot ${DESTDIR} /etc/rc.d/ldconfig forcestart
 148         umount_loop ${DESTDIR}/dev
 149
 150         cp /etc/resolv.conf ${DESTDIR}/etc/resolv.conf
 151
 152         return 0
 153 }
 154
 155 vm_extra_install_base() {
 156         # Prototype.  When overridden, runs extra post-installworld commands
 157         # as needed, based on the target virtual machine image or cloud
 158         # provider image target.
 159
 160         return 0
 161 }
 162
 163 vm_extra_enable_services() {
 164         if [ ! -z "${VM_RC_LIST}" ]; then
 165                 for _rcvar in ${VM_RC_LIST}; do
 166                         echo ${_rcvar}_enable="YES" >> ${DESTDIR}/etc/rc.conf
 167                 done
 168         fi
 169
 170         if [ -z "${VMCONFIG}" -o -c "${VMCONFIG}" ]; then
 171                 echo 'ifconfig_DEFAULT="DHCP inet6 accept_rtadv"' >> \
 172                         ${DESTDIR}/etc/rc.conf
 173         fi
 174
 175         return 0
 176 }
 177
 178 vm_extra_install_packages() {
 179         if [ -z "${VM_EXTRA_PACKAGES}" ]; then
 180                 return 0
 181         fi
 182         mkdir -p ${DESTDIR}/dev
 183         mount -t devfs devfs ${DESTDIR}/dev
 184         chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
 185                 /usr/sbin/pkg bootstrap -y
 186         chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
 187                 /usr/sbin/pkg install -y ${VM_EXTRA_PACKAGES}
 188         umount_loop ${DESTDIR}/dev
 189
 190         return 0
 191 }
 192
 193 vm_extra_install_ports() {
 194         # Prototype.  When overridden, installs additional ports within the
 195         # virtual machine environment.
 196
 197         return 0
 198 }
 199
 200 vm_extra_pre_umount() {
 201         # Prototype.  When overridden, performs additional tasks within the
 202         # virtual machine environment prior to unmounting the filesystem.
 203         # Note: When overriding this function, removing resolv.conf in the
 204         # disk image must be included.
 205
 206         rm -f ${DESTDIR}/etc/resolv.conf
 207         return 0
 208 }
 209
 210 vm_extra_pkg_rmcache() {
 211         if [ -e ${DESTDIR}/usr/local/sbin/pkg ]; then
 212                 chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
 213                         /usr/local/sbin/pkg clean -y -a
 214         fi
 215
 216         return 0
 217 }
 218
 219 umount_loop() {
 220         DIR=$1
 221         i=0
 222         sync
 223         while ! umount ${DIR}; do
 224                 i=$(( $i + 1 ))
 225                 if [ $i -ge 10 ]; then
 226                         # This should never happen.  But, it has happened.
 227                         echo "Cannot umount(8) ${DIR}"
 228                         echo "Something has gone horribly wrong."
 229                         return 1
 230                 fi
 231                 sleep 1
 232         done
 233
 234         return 0
 235 }
 236
 237 vm_create_disk() {
 238         echo "Creating image...  Please wait."
 239         echo
 240
 241         write_partition_layout || return 1
 242
 243         return 0
 244 }
 245
 246 vm_extra_create_disk() {
 247
 248         return 0
 249 }
 250