Commit Graph

68 Commits

Author SHA1 Message Date
gjb
043d779d9b Work around a potential bug in pw(8) when '-m' is specified.
According to the manual page, '-m' should create the user home
directory, however rigorous testing suggests it does not, and
it is unclear if this is an implementation or expectation issue.

Sponsored by:	The FreeBSD Foundation
2015-06-05 02:22:04 +00:00
gjb
b86973a665 Make sure /home exists within the DESTDIR before creating the
'freebsd' user account.

Sponsored by:	The FreeBSD Foundation
2015-06-04 23:11:24 +00:00
gjb
de010910ed Use the new pw(8) '-R' option to create the users/groups.
MFC after:	1 week
X-MFC-after:	r283961
Sponsored by:	The FreeBSD Foundation
2015-06-03 19:19:25 +00:00
gjb
a82be33c48 Pass the '-b' argument to pw(8) so the '/home' directory is created
in the correct place.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-06-02 15:02:30 +00:00
gjb
7447f1a3e1 In arm_create_disk(), disable soft updates journaling.
Disabling soft updates journaling appears to resolve issues
with kernel panics, and may also be generally bad to have
enabled for SD cards.

Requested by:	ian
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-06-01 21:10:47 +00:00
gjb
e961ac3d2e Re-enable arm_create_user(), and pass the '-V DESTDIR/etc' to
pw(8) to set the correct /etc directory for the user/group
files.

Provided by:	ian (thanks!)
MFC after:	3 days
X-MFC-with:	r283894
Sponsored by:	The FreeBSD Foundation
2015-06-01 20:59:18 +00:00
gjb
911994babe Disable arm_create_user(). As-is, this does not create the
user in the userland for the target image, but creates the
user in the build chroot.

Before this is re-enabled, I want to figure out a clean way
to do this without requiring the overhead of third-party
utilities (such as qemu).

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-06-01 20:26:38 +00:00
gjb
f930e15914 Fix virtual machine disk format creating by passing VMFORMAT
to mkimg(1)

PR:		200068
Submitted by:	Jeremy Norris
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-05-11 14:53:07 +00:00
gjb
fb117627f6 Merge ^/projects/release-arm-redux into ^/head.
Of note:

- This commit adds native FreeBSD/arm release build support without
  requiring out-of-tree utilities.

- Part of this merge removes the WANDBOARD-{SOLO,DUAL,QUAD} kernel
  configuration files, for which the IMX6 kernel configuration file
  should be used instead.

- The resulting images have a 'freebsd' user (password 'freebsd'),
  to allow ssh(1) access when console access is not available (VGA
  or serial).  The default 'root' user password is set to 'root'.

- The /etc/ttys file for arm images now enable both ttyv0 and ttyu0
  by default.

Help from:	many (boot testing, feedback, etc.)
Sponsored by:	The FreeBSD Foundation
2015-05-09 21:08:12 +00:00
gjb
c8fa25fd06 Fix path to /boot/msdos for the target image.
Sponsored by:	The FreeBSD Foundation
2015-05-08 10:38:32 +00:00
gjb
463d845cba Reorder / and /boot/msdos mount to avoid the following error:
Mounting local file systems:
mount: /boot/msdos: No such file or directory

Sponsored by:	The FreeBSD Foundation
2015-05-07 23:46:33 +00:00
gjb
2bf3795a46 Create the /boot/msdos directory so the FAT partition is mounted
properly.

Noticed by:	sbruno
Sponsored by:	The FreeBSD Foundation
2015-05-07 20:25:17 +00:00
gjb
22dede213e Enable the growfs rc(8) script.
Sponsored by:	The FreeBSD Foundation
2015-05-07 18:49:43 +00:00
gjb
3d9f396598 In arm_create_disk(), chroot(8) to the build environment
is necessary.

In arm_install_base(), chroot(8) when installing world
and kernel.  Fix paths for fstab(5) and rc.conf(5).

Sponsored by:	The FreeBSD Foundation
2015-05-07 17:35:48 +00:00
gjb
af0be5ff22 In release.sh, create the /dev directory within the chroot
before attempting to mount(8) devfs.  Also, create the
.OBJDIR for the 'release' target, so files end up in the
correct location.

In tools/arm.subr, fix the target device when creating the
gpart partition scheme.

Sponsored by:	The FreeBSD Foundation
2015-05-07 00:27:28 +00:00
gjb
db697baa50 Add tools/arm.subr to contain common subroutines used for
building arm images.  This is similar to tools/vmimage.subr
used for building virtual machine disk images.  By default,
only arm_create_disk() and arm_install_base() contain real
functionality here, and arm_install_uboot() must be overridden
in the arm/KERNEL.conf file.

In release.sh, make create_arm_armv6_build_release() do
something now.

In arm/BEAGLEBONE.conf, set IMAGE_SIZE, PART_SCHEME, FAT_SIZE,
FAT_TYPE, and MD_ARGS, as well as make arm_install_uboot()
functional.

Parts of this were taken from disecting a previous BEAGLEBONE
image, and other parts obtained from Crochet sources.

Sponsored by:	The FreeBSD Foundation
2015-05-06 19:58:12 +00:00
gjb
1289a25572 Remove crochet configuration files and tools/arm/ directory.
Sponsored by:	The FreeBSD Foundation
2015-05-06 15:59:29 +00:00
gjb
7ac181d7c0 Fix building BEAGLEBONE images with Crochet using the
sysutils/u-boot-beaglebone port:

 - In arm/BEAGLEBONE.conf, set EMBEDDEDPORTS to the
   sysutils/u-boot-beaglebone port.
 - In arm/release.sh, remove BEAGLEBONE from setting WANT_UBOOT
 - In tools/arm/crochet-BEAGLEBONE.conf, override the
   beaglebone_check_uboot(), and set BEAGLEBONE_UBOOT to
   /tmp/external/u-boot-beaglebone, and create symlinks to the
   u-boot files in /usr/local/share/u-boot-beaglebone and the
   uEnv.txt file in crochet/board/Beaglebone/files.

Sponsored by:	The FreeBSD Foundation
2015-05-05 21:08:50 +00:00
gjb
0f66edf8be Add initial support for building RPI2 images.
In release.sh, allow overriding buildenv_setup() before
the handoff to arm/release.sh.

Copy arm/RPI-B.conf -> arm/RPI2.conf, set UBOOT_PORT and
the correct KERNEL, and add the buildenv_setup() override
to install the sysutils/u-boot-rpi2 port/package.

Copy tools/arm/crochet-RPI-B.conf -> tools/arm/crochet-RPI2.conf,
and set the correct entries for the RaspberryPi2 board.

Thanks to:	loos@
Sponsored by:	The FreeBSD Foundation
2015-05-05 16:28:04 +00:00
gjb
e60260c0b0 Fix a comment.
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-04-27 19:49:50 +00:00
gjb
09615c77fe Create the arm64/aarch64 VM disk image as MBR instead of
GPT scheme.  UEFI needs to know the unique partition GUID
with GPT, which changes each time.  Specifically, the QEMU
EFI BIOS file has this hard-coded.[1]

Since the GPT labels are now unavailable, unconditionally
label the root filesystem as 'rootfs' with newfs(8), since
it does not hurt anything anywhere else.  For the arm64 case,
'/' is mounted from /dev/ufs/rootfs; for all other VM images,
'/' is mounted from /dev/gpt/rootfs.

Unfortunately, since the /dev/gpt/swapfs label is also lost,
set NOSWAP=1 for the arm64/aarch64 images.  This is temporary,
until I figure out a scalable solution to this.  But, a certain
piece of softare was written "very fast", and ended up living
for 15 years.  We can deal with this for a week or so.

Information from:	andrew, emaste [1]
Sponsored by:	The FreeBSD Foundation
2015-04-23 01:04:14 +00:00
gjb
9c99303fe2 Revert r281809, which did more harm than good, and apply
a more proper fix when attempting to locate the /boot
files.

Sponsored by:	The FreeBSD Foundation
2015-04-21 14:48:38 +00:00
gjb
62ee754a89 Simplify variable expansion in attempt to fix the vm-image build.
Sponsored by:	The FreeBSD Foundation
2015-04-21 02:49:44 +00:00
gjb
aae7c8c171 Add support for building arm64/aarch64 virtual machine images.
Sponsored by:	The FreeBSD Foundation
2015-04-20 20:06:25 +00:00
gjb
d772346661 When building VM disk images, vm_copy_base() uses tar(1) to
copy the userland from one md(4)-mounted filesystem to a clean
filesystem to prevent remnants of files that were added and
removed from resulting in an unclean filesystem.  When newfs(8)
creates the first filesystem with journaled soft-updates enabled,
the /.sujournal file in the new filesystem cannot be overwritten
by the /.sujournal in the original filesystem.

To avoid this particular error case, do not enable journaled
soft-updates when creating the md(4)-backed filesystems, and
instead use tunefs(8) to enable journaled soft-updates after
the new filesystem is populated in vm_copy_base().

While here, fix a long standing bug where the build environment
/boot files were used by mkimg(1) when creating the VM disk
images by using the files in .OBJDIR.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2015-04-20 19:54:54 +00:00
cperciva
30e3acf20a It would help if I committed the right patch... 2015-03-31 04:35:35 +00:00
cperciva
2d3f9a1b0b Partially revert r278118 now that the required logic for deciding whether
freebsd-update can be useful has moved into the firstboot_freebsd_update
script.
2015-03-31 01:44:29 +00:00
cperciva
763a23e973 Add bits for building EC2 disk images. Make logic for uploading these
to create EC2 AMIs will come in a later commit.
2015-03-31 01:28:33 +00:00
gjb
b4b14712b0 Sigh. s/AutoSize/Growfs/ following upstream commit r761.
MFH:		3 days
Sponsored by:	The FreeBSD Foundation
2015-03-30 19:08:37 +00:00
cperciva
421e560425 Improve check for whether ${DESTDIR}/dev is mounted.
Submitted by:	gcooper
2015-03-30 09:08:24 +00:00
cperciva
e41362f7d1 Clean up filesystem unmounting in vmimage builds:
* Remove vm_umount_base function which is currently unused.
* Add umount_loop function which loops attempting to unmount one filesystem.
* Replace calls to umount with calls to umount_loop.
* Don't attempt to unmount ${DESTDIR}/dev if it isn't mounted.

The looping is necessary because sometimes umount fails due to filesystems
being busy.  The most common cause of such busyness is periodic(8) jobs
running `find / ...`.

Reviewed by:	gjb
2015-03-30 08:33:19 +00:00
cperciva
f1bd255f86 When creating VM images, copy the contents of the created filesystem into
a new filesystem before packaging it into a disk image.  This prevents
"remnants" of deleted files from showing up in the VM images, and reduces
their compressed size (by about 10% for the cloudware images) as a result.

Looks good to:	gjb
2015-03-20 19:40:19 +00:00
gjb
1a0d38818e Add a CLOUDPACKAGE variable to contain a list of targets for
post-install packaging cloud provider images.

Add a 'gce-package.sh' script to generate the final output
image ready for upload to the GCE platform.  Right now, this
is the only image that has a specific output format (GNU-tar),
and this implementation is expected to be temporary.

This is not directly connected to the other release targets.

MFC after:	1 week
X-MFC-with:	r279249, r279250
Sponsored by:	The FreeBSD Foundation
2015-02-24 22:27:02 +00:00
gjb
2c9ed945e2 Use ifconfig_DEFAULT="" instead of hard-coding vtnet(4)
MFC after:	2 weeks
X-MFC-with:	r277458, r277536, r277606, r277609,
		r277836, r278118
Sponsored by:	The FreeBSD Foundation
2015-02-03 00:10:48 +00:00
gjb
103061b4c4 Move service_enable="YES" rc.conf(5) additions to
VM_RC_LIST and deduplicate.

Evaluate if firstboot_freebsd_update should be enabled
based on UNAME_r, because it is not supported for the
-CURRENT or -STABLE branches.

MFC after:	2 weeks
X-MFC-with:	r277458, r277536, r277606, r277609,
		r277836
Sponsored by:	The FreeBSD Foundation
2015-02-03 00:07:54 +00:00
gjb
bb3fec85f3 Merge the following revisions from ^/projects/release-vmimage:
r273823-r273826, r273833, r273836, r273944, r274069-r274071,
 r274134, r274211, r274280-r274285, r274287-r274288, r274292,
 r274296-r274297, r274356, r274533, r274725, r274726, r274729,
 r274734, r274771, r274945-r274946, r277180, r277183-r277184,
 r277186-r277187, r277250-r277253, r277263-r277264, r277383-r277384,
 r277393-r277395, r277438-r277439, r277447, r277455:

 r273823:
  Move virtual machine / cloud provider targets and
  options from release/Makefile to their own Makefile.

 r273824:
  Add glue to allow enabling building cloud provider VM images
  by default.

  When WITH_CLOUDWARE is not empty, add CLOUDTARGETS to the
  release/Makefile 'release' target.

 r273825:
  Avoid hard-coding the Azure image file format.  While here,
  avoid using OSRELEASE for the output file name.

 r273826:
  Remove a few vestiges of passing an exit code to panic().

 r273833:
  Initial commit providing a mechanism to create openstack images
  as part of the release build.

 r273836:
  Fix output file name for openstack images.  No further conversion
  is necessary for this VM file target, so there is no need to append
  the '.raw' suffix here.

 r273944:
  Uncomment the cloudinit rc.conf(5) line.

 r274069:
  Add line continuation so OPENSTACKCONF is actually included in the env(1).

 r274070:
  Add a 'vm-cloudware' target, used to drive all targets in CLOUDTARGETS.

 r274071:
  Add examples for WITH_CLOUDWARE to release.conf.sample.
  Add WITH_CLOUDWARE evaluation to RELEASE_RMAKEFLAGS.

 r274134:
  Initial rewrite to consolidate VM image build scripts into one.

 r274211:
  Add write_partition_layout() used to populate the final image.

  Fix duplicated mkimg(1) call in vm_create_disk().

  Add primitive (untested) PowerPC/PowerPC64 VM image support.

  Note: As it is currently written, the /boot/pmbr and
  /boot/{gptboot,boot1.hfs} use the build host and not the target
  build.  Fixing this is likely going to be a hack in itself.

 r274280:
  Return if vm_create_disk() is unsuccessful.

 r274281:
  Add CLEANFILES entry for VM targets

 r274282:
  Add vm_extra_pre_umount() prototype to vmimage.subr.

 r274283:
  Fix DESTDIR for installworld, and make sure it is created before use.

 r274284:
  Move usage() from vmimage.subr to mk-vmimage.sh, in case vmimage.subr
  has not been sourced.

 r274285:
  Spell 'OPTARG' correctly.  Actually call vm_create_base().

 r274287:
  Fix line continuation in write_partition_layout().
  Remove variable test that is no longer needed.

 r274288:
  Fix scheme flag to mkimg(1).

 r274292:
  mount(8) and umount(8) devfs(5) as needed.

 r274296:
  Change path for mk-vmimage.sh from ${TARGET}/ to scripts/ now that
  it is consolidated into one file.

  Fix paths for the base image and output disk image files.

 r274297:
  Call cleanup() after everything is done.

 r274356:
  Remove a stray directory from CLEANFILES.

 r274533:
  Set the boot partition type to 'apple-boot' for powerpc.

 r274725:
  In vm_install_base(), copy the host resolv.conf into
  the build chroot before attempting to do anything that
  requires working DNS (i.e., pkg bootstrap).

  In vm_extra_pre_umount(), remove the resolv.conf before
  the disk image is unmounted from the backing md(4).

 r274726 (cperciva):
  Silence errors when umounting the chroot's /dev, since it
  probably doesn't exist when we're running this.

  Unmount filesystems before attempting to destroy the md which
  holds them.

 r274729 (cperciva):
  Unmount filesystem and destroy md before we read the vnode from
  disk and package it into a disk image.  Otherwise we end up
  packaging an unclean filesystem.

 r274734 (cperciva):
  Merge duplicative vm-CLOUDTYPE targets before additional duplication
  gets added by the impending arrival of ec2 and gcloud.

 r274771 (cperciva):
  Add NOSWAP option which can be set by a vmimage.conf file to specify
  that no swap space should be created in the image.  This will be used
  by EC2 builds, since FreeBSD/EC2 allocates swap space on "ephemeral"
  disks which are physically attached to the Xen host node.

 r274945:
  In vm_extra_install_packages(), only bootstrap pkg(8) if
  VM_EXTRA_PACKAGES is empty.

  In vm_extra_pre_umount(), cleanup downloaded packages if pkg(8) was
  bootstrapped earlier.

 r274946:
  Fix indentation nit.

 r277180:
  In vm_extra_install_base(), do not install waagent in the openstack
  image, because it is not used.  This appears to be a copy mistake.

  Remove vm_extra_install_base() from the openstack.conf entirely,
  since it does not need to be overridden.

 r277183:
  Enable the textmode console by default for VM images, since there is
  no way to tell if the environment will be able to use the
  graphics-mode console.

 r277184:
  Enable password-less sudo for openstack images.

 r277186:
  Update the VM_EXTRA_PACKAGES list for the openstack images.

  The documentation suggests doing a "just fetch this and run it"-style
  bootstrap, from which the list of dependencies was obtained (in
  github, at: pellaeon/bsd-cloudinit-installer)

  There is one Python dependency unmet, oslo.config, which is not in
  the Ports Collection.

 r277187:
  Add a comment to note that setting hw.vga.textmode=1 is temporary.

 r277250:
  Remove vm_extra_install_base() for the Azure image, now that the
  waagent exists in the ports tree.

  Add sysutils/azure-agent to the VM_EXTRA_PACKAGES list.

  In vm_extra_pre_umount(), remove the explicit pkg(8) install
  list, as dependencies are resolved by sysutils/azure-agent.

 r277251:
  Add a 'list-cloudware' target to print the list of supported CLOUDWARE
  values and a description.

  Add the AZURE_DESC and OPENSTACK_DESC descriptions.

 r277252:
  Update release(7)

 r277253:
  Add 'list-vmtargets' target, which produces a list of all supported
  VM and cloud provider images.

  Add VHD_DESC, VMDK_DESC, QCOW2_DESC, RAW_DESC image descriptions.

  Format the output to make a bit more readable.

  Update release(7) to document the list-vmtargets target.

 r277263:
  Add initial support for the GCE (Google Compute Engine) cloud hosting
  provider image.

 r277264:
  Style and line length cleanup.

 r277383:
  Remove the console setting from rc.conf(5), which is not used there.
  While here, set console to include vidconsole in the loader.conf(5).

 r277384:
  Fix an indentation nit.
  No functional changes.

 r277393:
  Remove the pkg-clean(8) call from vm_extra_pre_umount() since the
  function is often overridden.

  Add vm_extra_pkg_rmcache() to call pkg-clean(8) to avoid duplicated
  code.

 r277394:
  Move resolv.conf(5) removal back to vm_extra_pre_umount() where it
  belongs.

  The GCE image needs resolv.conf(5) to exist (created as part of the
  image setup), so it cannot be removed.

 r277395:
  Comment the line that configures ttys(5) to 'off', which makes it
  impossible to test that the image boots.

  Add a note explaining why the line is commented, and not (yet) removed
  entirely.

 r277438:
  Move the 'install' bits that are specific to virtual machine images
  from the Makefile to Makefile.vm.

  Rename the 'install' target to 'release-install', and add a new
  'vm-install' target.

  Add a new 'install' target that invokes the new targets.

 r277439:
  Add WITH_CLOUDWARE to the list of make(1) variables for the release
  build.

 r277447:
  Remove hw.vga.textmode=1 from the VM image loader.conf, which was
  included during test builds and not intended to be included when
  merging this project branch back to head.

 r277455:
  Remove mk-azure.sh, which is no longer needed.

MFC after:	1 month
X-MFC-To:	stable/10 (requires mkimg(1))
Help from:	cperciva, swills
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation
2015-01-20 23:56:04 +00:00
gjb
2f6be49b3a Add initial support for the GCE (Google Compute Engine)
cloud hosting provider image.

Many thanks to swills@ for his work on getting this to
this point.

Submitted by:	swills
Sponsored by:	The FreeBSD Foundation
2015-01-16 19:27:19 +00:00
gjb
0d86658a18 Remove vm_extra_install_base() for the Azure image, now
that the waagent exists in the ports tree.

Add sysutils/azure-agent to the VM_EXTRA_PACKAGES list.

In vm_extra_pre_umount(), remove the explicit pkg(8) install
list, as dependencies are resolved by sysutils/azure-agent.

Sponsored by:	The FreeBSD Foundation
2015-01-16 15:37:07 +00:00
gjb
8bf2cea4c9 Add a comment to note that setting hw.vga.textmode=1 is
temporary.

Sponsored by:	The FreeBSD Foundation
2015-01-14 16:42:54 +00:00
gjb
57dffb5c40 Update the VM_EXTRA_PACKAGES list for the openstack
images.

The documentation suggests doing a "just fetch this
and run it"-style bootstrap, from which the list of
dependencies was obtained (in github, at:
pellaeon/bsd-cloudinit-installer)

There is one Python dependency unmet, oslo.config,
which is not in the Ports Collection.

Sponsored by:	The FreeBSD Foundation
2015-01-14 16:27:43 +00:00
gjb
64286bf832 Enable password-less sudo for openstack images.
Sponsored by:	The FreeBSD Foundation
2015-01-14 15:45:18 +00:00
gjb
5107643b94 Enable the textmode console by default for VM images,
since there is no way to tell if the environment will
be able to use the graphics-mode console.

Sponsored by:	The FreeBSD Foundation
2015-01-14 15:23:58 +00:00
gjb
f0d9ad0c85 In vm_extra_install_base(), do not install waagent
in the openstack image, because it is not used.  This
appears to be a copy mistake.

Remove vm_extra_install_base() from the openstack.conf
entirely, since it does not need to be overridden.

Sponsored by:	The FreeBSD Foundation
2015-01-14 14:49:05 +00:00
gjb
7f08d7ffb1 Fix indentation nit.
Sponsored by:	The FreeBSD Foundation
2014-11-24 02:36:43 +00:00
gjb
14b8fb2398 In vm_extra_install_packages(), only bootstrap pkg(8)
if VM_EXTRA_PACKAGES is empty.

In vm_extra_pre_umount(), cleanup downloaded packages
if pkg(8) was bootstrapped earlier.

Inspired by:	cperciva
Sponsored by:	The FreeBSD Foundation
2014-11-24 02:34:01 +00:00
gjb
5074f8a73e Revert r274773, after I *specifically* objected to this change
numerous times.

Sponsored by:	The FreeBSD Foundation
2014-11-21 02:30:37 +00:00
cperciva
8b1726e8cc Change how packages are installed into VM images: Rather than chrooting
into the image and running 'pkg install' from there, use 'pkg fetch' to
download packages into a temporary location and then 'pkg add' to install
them into the image.

This simplifies the code by avoiding the need to copy /etc/resolv.conf
into the image and then delete it later, and makes it possible to cross
build (e.g., to create an amd64 image when running on i386 hardware; or
in the future for building disk images for embedded platforms).

Because pkg was implicitly installed when VM_EXTRA_PACKAGES was non-empty,
add it to VM_EXTRA_PACKAGES in azure.conf and openstack.conf to maintain
the current behaviour.

By default repo-FreeBSD.sqlite is copied into the image, (a) to match
previous behaviour, where the file would be downloaded by the chrooted
pkg invocation; and (b) because it may be useful for testing purposes,
e.g., to see why a package didn't get installed.  Because this file is
large (46 MB) and not likely to be useful in -RELEASE images which are
being launched into Clouds several months later, it can be disabled by
setting NOREPOSQLITE.

As far as I know this commit does not change the disk images produced in
any filesystem-visible way.
2014-11-21 02:13:12 +00:00
cperciva
cb036cbe50 Add NOSWAP option which can be set by a vmimage.conf file to specify that
no swap space should be created in the image.  This will be used by EC2
builds, since FreeBSD/EC2 allocates swap space on "ephemeral" disks which
are physically attached to the Xen host node.
2014-11-21 01:53:40 +00:00
cperciva
9e2769f85a Silence errors when umounting the chroot's /dev, since it probably doesn't
exist when we're running this.

Unmount filesystems before attempting to destroy the md which holds them.
2014-11-19 22:17:22 +00:00
gjb
ee5ba5e498 In vm_install_base(), copy the host resolv.conf into
the build chroot before attempting to do anything that
requires working DNS (i.e., pkg bootstrap).

In vm_extra_pre_umount(), remove the resolv.conf before
the disk image is unmounted from the backing md(4).

Reported by:	cperciva
Sponsored by:	The FreeBSD Foundation
2014-11-19 20:19:53 +00:00