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switch from virt-builder to virt-install (T813)

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Summary:
We've kinda been having too much trouble with virt-builder
lately, mainly SELinux related issues due to how it does image
customization. It also produces images that differ in notable
ways from what a 'typical' install would give. virt-install
solves both these problems, and also gives us more flexibility
for storage configuration and post-install customization should
we need them in future.

The change isn't really too drastic, and the design is similar:
instead of virt-builder commands files, each image type now has
a kickstart file where all its customizations can be done.
There's also a single extra image dict key, 'variant', which
specifies which install tree variant to use for running the
install. It defaults to 'Everything' (for F24+) and 'Server'
(for <F24, as Everything wasn't installable until F24) but we
set it to 'Server' for the server images and 'Workstation' for
the desktop images, so those installs will use the correct
variant install class.

We run the installs in VNC. You can do it with a serial console
and log the output, but then anaconda gets clever and changes
several things in the installed system based on the fact that
you did the install over a serial console: it twiddles with
the kernel args and doesn't set graphical.target as the default.
We don't want any of that mess, so we do a VNC install.

The 'size' value is just a number of gigabytes for virt-install
images (as that's how the virt-install 'size' argument works).

This also drops some unused 32-bit images (we don't do 32-bit
KDE or Server upgrade tests, so there's no need to build those
images).

Test Plan:
Re-generate all affected images and re-run all tests
that use them, make sure they work. I am doing this on staging
at present. Note: this would render D911 unnecessary.

Reviewers: garretraziel

Reviewed By: garretraziel

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D917
This commit is contained in:
Adam Williamson 2016-07-04 09:29:25 -07:00
parent 2f80cd8067
commit 602d074708
12 changed files with 200 additions and 113 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

152
createhdds.py
View File

@ -23,23 +23,20 @@ import argparse
import logging
import json
import os
try:
import subprocess32 as subprocess
except ImportError:
import subprocess
import sys
import time
import tempfile
import time
import fedfind.helpers
import guestfs
import pexpect
import libvirt
from six.moves.urllib.request import urlopen
# this is a bit icky, but it means you can run the script from
# anywhere - we use this to locate hdds.json and the virtbuilder
# image command files, so they must always be in the same place
# anywhere - we use this to locate hdds.json and the virtinstall
# image kickstarts, so they must always be in the same place
# as the script itself. images are checked/created in the working
# directory.
SCRIPTDIR = os.path.abspath(os.path.dirname(sys.argv[0]))
@ -181,49 +178,85 @@ class GuestfsImage(object):
gfs.close()
class VirtBuilderImage(object):
"""Class representing an image created by virt-builder. 'release'
is the release the image will be built for. 'arch' is the arch.
'size' is the desired image size, valid formats are a digit string
(size in bytes, digit string plus 'M', 'MB' or 'MiB' (size in
power of two megabytes), or digit string plus 'G', 'GB' or 'GiB'
(size in power of two gigabytes). 0 (or any false-y value) means
the image will be the size of the upstream base image. 'imgver' is
class VirtInstallImage(object):
"""Class representing an image created by virt-install. 'release'
is the release the image will be built for. 'variant' is the
variant whose install tree should be used. 'arch' is the arch.
'size' is the desired image size, in gigabytes. 'imgver' is
the image 'version' - in practice it's simply a string that gets
included in the image file name if specified. 'maxage' is the
maximum age of the image file (in days) - if the image is older
than this, 'check' will report it as 'outdated' and 'all' will
rebuild it.
"""
def __init__(self, name, release, arch, size=0, imgver='', maxage=14):
def __init__(self, name, release, arch, size, variant=None, imgver='', maxage=14):
self.name = name
self.size = handle_size(size)
self.size = size
self.filename = "disk_f{0}_{1}".format(str(release), name)
if imgver:
self.filename = "{0}_{1}".format(self.filename, imgver)
self.filename = "{0}_{1}.img".format(self.filename, arch)
self.release = release
self.variant = variant
self.arch = arch
self.maxage = maxage
if variant:
self.variant = variant
else:
if release < 24:
self.variant = "Server"
else:
self.variant = "Everything"
def create(self, retries=3):
"""Create the image."""
# figure out the best os-variant. this is harder than it ought
# to be thanks to RHBZ #1351718...
found = False
rel = self.release + 1
shortid = ""
while not found:
rel -= 1
shortid = "fedora{0}".format(str(rel))
args = ["osinfo-query", "os", "short-id={0}".format(shortid)]
process = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
out = process.communicate()[0].decode()
if shortid in out:
found = True
# destroy and delete the domain we use for all virt-installs
conn = libvirt.open()
try:
dom = conn.lookupByName('createhdds')
try:
dom.destroy()
except libvirt.libvirtError:
# domain may not be running, so this is fine
pass
dom.undefine()
except libvirt.libvirtError:
# domain may not exist, so this is fine
pass
conn.close()
tmpfile = "{0}.tmp".format(self.filename)
try:
# Basic creation command with standard params
args = ["virt-builder", "fedora-{0}".format(str(self.release)), "-o", tmpfile,
"--arch", self.arch]
if self.size:
args.extend(["--size", "{0}b".format(str(int(self.size)))])
# We use guestfs's ability to read customization commands from
# a file. The convention is to have a file 'name.commands' in
# SCRIPTDIR; if this file exists, we pass it to virt-builder.
if os.path.isfile("{0}/{1}.commands".format(SCRIPTDIR, self.name)):
args.extend(["--commands-from-file", "{0}/{1}.commands".format(SCRIPTDIR, self.name)])
loctmp = "https://download.fedoraproject.org/pub/fedora/linux/releases/{0}/{1}/{2}/os"
arch = self.arch
if arch == 'i686':
arch = 'i386'
args = ["virt-install", "--disk", "size={0},path={1}".format(self.size, tmpfile),
"--os-variant", shortid, "-x",
"inst.ks=file:/{0}.ks".format(self.name), "--initrd-inject",
"{0}/{1}.ks".format(SCRIPTDIR, self.name), "--location",
loctmp.format(str(self.release), self.variant, arch), "--graphics", "vnc",
"--name", "createhdds", "--memory", "2048", "--noreboot", "--noautoconsole",
"--wait", "-1"]
# run the command, timing out after 1 hour; sometimes creation
# seems to just get mysteriously stuck, we need to bail and
# retry in this case
try:
logger.info("Install running, connect via VNC to monitor")
ret = subprocess.call(args, timeout=3600)
except subprocess.TimeoutExpired:
logger.warning("Image creation timed out!")
@ -238,33 +271,27 @@ class VirtBuilderImage(object):
# wipe the temp file
if os.path.isfile(tmpfile):
os.remove(tmpfile)
sys.exit("virt-builder command {0} failed!".format(' '.join(args)))
# We have to boot the disk to make SELinux relabelling happen;
# virt-builder can't do it unless the policy version on the host
# is the same as the guest(?) There are lots of bad ways to do
# this, expect is the one we're using. This can also get stuck
# apparently, so let's set a 300 sec timeout for each expect
# and bail if it's hit.
try:
logger.info("Booting image to trigger SELinux relabel...")
child = pexpect.spawnu("qemu-kvm -m 2G -nographic {0}".format(tmpfile), timeout=600)
child.expect(u"localhost login:")
child.sendline(u"root")
child.expect(u"Password:")
child.sendline(u"weakpassword")
child.expect(u"~]#")
child.sendline(u"poweroff")
child.expect(u"reboot: Power down")
child.close()
except pexpect.TIMEOUT:
sys.exit("virt-install command {0} failed!".format(' '.join(args)))
# at this point the domain should be shut off; if it's
# anything else, something went wrong: clean up and exit
conn = libvirt.open()
dom = conn.lookupByName('createhdds')
if dom.state()[0] != libvirt.VIR_DOMAIN_SHUTOFF:
conn.close()
if os.path.isfile(tmpfile):
os.remove(tmpfile)
sys.exit("Timed out booting image!")
# we're all done! rename to the correct name
sys.exit("libvirt domain ('createhdds') is not shutdown! "
"this is an unexpected condition, aborting.")
# we're all done! rename to the correct name and clean up
# the domain
os.rename(tmpfile, self.filename)
os.chmod(self.filename, 0o644)
dom.undefine()
conn.close()
except:
# if anything went wrong, we want to wipe the temp file
# then raise
# then raise. we leave the domain intact in case we want
# to debug it
if os.path.isfile(tmpfile):
os.remove(tmpfile)
raise
@ -335,9 +362,9 @@ def get_guestfs_images(imggrp, labels=None, filesystems=None):
imgs.append(img)
return imgs
def get_virtbuilder_images(imggrp, nextrel=None, releases=None):
def get_virtinstall_images(imggrp, nextrel=None, releases=None):
"""Passed a single 'image group' dict (usually read out of hdds.
json), returns a list of VirtBuilderImage instances. 'nextrel'
json), returns a list of VirtInstallImage instances. 'nextrel'
indicates the 'next' release of Fedora: sometimes we determine the
release to build image(s) for in relation to this, so we need to
know it. If it's not specified, we ask fedfind to figure it out
@ -360,6 +387,8 @@ def get_virtbuilder_images(imggrp, nextrel=None, releases=None):
name = imggrp['name']
# this is the second place we set a default for maxage - bit ugly
maxage = int(imggrp.get('maxage', 14))
# ditto variant
variant = imggrp.get('variant')
if not releases:
releases = imggrp['releases']
size = imggrp.get('size', 0)
@ -373,7 +402,8 @@ def get_virtbuilder_images(imggrp, nextrel=None, releases=None):
relnum = int(nextrel) + int(relnum)
for arch in arches:
imgs.append(
VirtBuilderImage(name, relnum, arch, size=size, imgver=imgver, maxage=maxage))
VirtInstallImage(name, relnum, arch, variant=variant, size=size, imgver=imgver,
maxage=maxage))
return imgs
def get_all_images(hdds, nextrel=None):
@ -390,8 +420,8 @@ def get_all_images(hdds, nextrel=None):
for imggrp in hdds['guestfs']:
imgs.extend(get_guestfs_images(imggrp))
for imggrp in hdds['virtbuilder']:
imgs.extend(get_virtbuilder_images(imggrp, nextrel=nextrel))
for imggrp in hdds['virtinstall']:
imgs.extend(get_virtinstall_images(imggrp, nextrel=nextrel))
return imgs
def do_renames(hdds):
@ -557,9 +587,9 @@ def cli_image(args, *_):
filesystems = [args.filesystem]
imgs = get_guestfs_images(imggrp, labels=labels, filesystems=filesystems)
elif imgtype == 'virtbuilder':
elif imgtype == 'virtinstall':
# If the user passed args.release, we construct a releases
# dict to pass to get_virtbuilder_images to override the dict
# dict to pass to get_virtinstall_images to override the dict
# from imggrp. If they passed args.arch, we use that arch,
# otherwise we default to x86_64. If args.release isn't set,
# we just pass None as release, and the releases dict from
@ -573,7 +603,7 @@ def cli_image(args, *_):
else:
arches = ['x86_64']
releases = {args.release: arches}
imgs = get_virtbuilder_images(imggrp, releases=releases)
imgs = get_virtinstall_images(imggrp, releases=releases)
for (num, img) in enumerate(imgs, 1):
logger.info("Creating image %s...[%s/%s]", img.filename, str(num), str(len(imgs)))
@ -649,11 +679,11 @@ def parse_args(hdds):
# hdds into args for cli_image() to use.
imgparser.set_defaults(imggrp=('guestfs', imggrp))
# For libvirt images, we provide args to override the release/arch
# combination; using args.release will always result in just a
# For virtinstall images, we provide args to override the release/
# arch combination; using args.release will always result in just a
# single image being built, for x86_64 unless args.arch is set to
# i686.
for imggrp in hdds['virtbuilder']:
for imggrp in hdds['virtinstall']:
imgparser = subparsers.add_parser(
imggrp['name'], description="Create {0} image(s)".format(imggrp['name']))
imgparser.add_argument(
@ -670,7 +700,7 @@ def parse_args(hdds):
imgparser.set_defaults(func=cli_image)
# Here we're stuffing the type of the image and the dict from
# hdds into args for cli_image() to use.
imgparser.set_defaults(imggrp=('virtbuilder', imggrp))
imgparser.set_defaults(imggrp=('virtinstall', imggrp))
return parser.parse_args()
def main():

11
desktop.commands
View File

@ -1,11 +0,0 @@
root-password password:weakpassword
update
selinux-relabel
install @workstation-product-environment
firstboot-command useradd -m -p '' test
firstboot-command echo 'test:weakpassword' | chpasswd
# we do this on firstboot (i.e. when createhdds boots to do the selinux
# relabel) so the selinux label on the symlink is correct; see RHBZ #1349586
firstboot-command systemctl set-default graphical.target
# workaround RHBZ #1349664
firstboot-command systemctl enable gdm.service

17
desktop.ks Normal file
View File

@ -0,0 +1,17 @@
install
bootloader --location=mbr
network --bootproto=dhcp
url --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
repo --name=updates --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
clearpart --all
autopart
rootpw --plaintext weakpassword
user --name=test --password=weakpassword --plaintext
poweroff
%packages
@^workstation-product-environment
%end

32
hdds.json
View File

@ -123,13 +123,15 @@
]
}
],
"virtbuilder" : [
"virtinstall" : [
{
"name" : "minimal",
"releases" : {
"-1" : ["x86_64"],
"-2" : ["x86_64"]
}
},
"size" : "6",
"imgver": "2"
},
{
"name" : "desktop",
@ -137,32 +139,36 @@
"-1" : ["x86_64", "i686"],
"-2" : ["x86_64", "i686"]
},
"size" : "20G",
"imgver": "2"
"size" : "20",
"imgver": "3",
"variant": "Workstation"
},
{
"name" : "server",
"releases" : {
"-1" : ["x86_64", "i686"],
"-2" : ["x86_64", "i686"]
"-1" : ["x86_64"],
"-2" : ["x86_64"]
},
"imgver": "2"
"size" : "6",
"imgver": "3",
"variant": "Server"
},
{
"name" : "kde",
"releases" : {
"-1" : ["x86_64", "i686"],
"-2" : ["x86_64", "i686"]
"-1" : ["x86_64"],
"-2" : ["x86_64"]
},
"size" : "20G",
"imgver": "2"
"size" : "20",
"imgver": "3"
},
{
"name" : "support",
"imgver" : "2",
"releases" : {
"-1" : ["x86_64"]
}
},
"size" : "6",
"imgver" : "3"
}
],
"renames" : []

14
kde.commands
View File

@ -1,14 +0,0 @@
root-password password:weakpassword
update
selinux-relabel
# the imsettings-qt is to work around RHBZ #1349743
install @kde-desktop-environment,imsettings-qt
delete /etc/systemd/system/multi-user.target.wants/initial-setup-text.service
delete /etc/systemd/system/graphical.target.wants/initial-setup-graphical.service
firstboot-command useradd -m -p '' test
firstboot-command echo 'test:weakpassword' | chpasswd
# we do this on firstboot (i.e. when createhdds boots to do the selinux
# relabel) so the selinux label on the symlink is correct; see RHBZ #1349586
firstboot-command systemctl set-default graphical.target
# workaround RHBZ #1349664
firstboot-command systemctl enable sddm.service

20
kde.ks Normal file
View File

@ -0,0 +1,20 @@
install
bootloader --location=mbr
network --bootproto=dhcp
url --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
repo --name=updates --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
clearpart --all
autopart
rootpw --plaintext weakpassword
user --name=test --password=weakpassword --plaintext
poweroff
%packages
@^kde-desktop-environment
imsettings-qt
-initial-setup
-initial-setup-gui
%end

3
minimal.commands
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@ -1,3 +0,0 @@
root-password password:weakpassword
update
selinux-relabel

16
minimal.ks Normal file
View File

@ -0,0 +1,16 @@
install
bootloader --location=mbr
network --bootproto=dhcp
url --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
repo --name=updates --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
clearpart --all
autopart
rootpw weakpassword
poweroff
%packages
@core
%end

6
server.commands
View File

@ -1,6 +0,0 @@
root-password password:weakpassword
update
selinux-relabel
install @server-product-environment
firstboot-command useradd -m -p '' test
firstboot-command echo 'test:weakpassword' | chpasswd

17
server.ks Normal file
View File

@ -0,0 +1,17 @@
install
bootloader --location=mbr
network --bootproto=dhcp
url --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
repo --name=updates --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
clearpart --all
autopart
rootpw weakpassword
user --name=test --password=weakpassword --plaintext
poweroff
%packages
@^server-product-environment
%end

4
support.commands
View File

@ -1,4 +0,0 @@
root-password password:weakpassword
update
selinux-relabel
install scsi-target-utils,nfs-utils,dnsmasq

19
support.ks Normal file
View File

@ -0,0 +1,19 @@
install
bootloader --location=mbr
network --bootproto=dhcp
url --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
repo --name=updates --mirrorlist=https://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
clearpart --all
autopart
rootpw weakpassword
poweroff
%packages
@core
scsi-target-utils
nfs-utils
dnsmasq
%end