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move image-minimizer to lorax (#1082642)

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This is used as a kickstart %post interpreter to streamline
modifications to images.

Also adds an example kickstart.

This obsoletes the old appliance-tools-minimizer and includes a Provide
so that the transition will be seamless.
This commit is contained in:
Brian C. Lane 2014-03-31 11:13:03 -07:00
parent cc2f98bfc5
commit 99f2ab9137
4 changed files with 307 additions and 0 deletions
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104
docs/fedora-minimized.ks Normal file
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@ -0,0 +1,104 @@
# Minimal Disk Image -- Example of image-minimizer usage in %post
#
sshpw --username=root --plaintext randOmStrinGhERE
# Firewall configuration
firewall --enabled
# Use network installation
url --url="http://dl.fedoraproject.org/pub/fedora/linux/development/20/x86_64/os/"
# Root password
rootpw --plaintext removethispw
# Network information
network --bootproto=dhcp --onboot=on --activate
# System authorization information
auth --useshadow --enablemd5
# System keyboard
keyboard --xlayouts=us --vckeymap=us
# System language
lang en_US.UTF-8
# SELinux configuration
selinux --enforcing
# Installation logging level
logging --level=info
# Shutdown after installation
shutdown
# System timezone
timezone US/Eastern
# System bootloader configuration
bootloader --location=mbr
# Clear the Master Boot Record
zerombr
# Partition clearing information
clearpart --all
# Disk partitioning information
part / --fstype="ext4" --size=4000
part swap --size=1000
%post
# Remove root password
passwd -d root > /dev/null
%end
%packages
@core
kernel
memtest86+
grub2-efi
grub2
shim
syslinux
-dracut-config-rescue
%end
#
# Use the image-minimizer to remove some packages and dirs
#
%post --interpreter=image-minimizer --nochroot
# Kernel modules minimization
# Drop many filesystems
drop /lib/modules/*/kernel/fs
keep /lib/modules/*/kernel/fs/ext*
keep /lib/modules/*/kernel/fs/mbcache*
keep /lib/modules/*/kernel/fs/squashfs
keep /lib/modules/*/kernel/fs/jbd*
keep /lib/modules/*/kernel/fs/btrfs
keep /lib/modules/*/kernel/fs/cifs*
keep /lib/modules/*/kernel/fs/fat
keep /lib/modules/*/kernel/fs/nfs
keep /lib/modules/*/kernel/fs/nfs_common
keep /lib/modules/*/kernel/fs/fscache
keep /lib/modules/*/kernel/fs/lockd
keep /lib/modules/*/kernel/fs/nls/nls_utf8.ko
keep /lib/modules/*/kernel/fs/configfs/configfs.ko
keep /lib/modules/*/kernel/fs/fuse
keep /lib/modules/*/kernel/fs/isofs
# No sound
drop /lib/modules/*/kernel/sound
# Drop some unused rpms, without dropping dependencies
droprpm checkpolicy
droprpm dmraid-events
droprpm gamin
droprpm gnupg2
droprpm linux-atm-libs
droprpm make
droprpm mtools
droprpm mysql-libs
droprpm perl
droprpm perl-Module-Pluggable
droprpm perl-Net-Telnet
droprpm perl-PathTools
droprpm perl-Pod-Escapes
droprpm perl-Pod-Simple
droprpm perl-Scalar-List-Utils
droprpm perl-hivex
droprpm perl-macros
droprpm sgpio
droprpm syslinux
droprpm system-config-firewall-base
droprpm usermode
%end

4
lorax.spec
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@ -60,6 +60,9 @@ Requires: grub2-tools
Requires: openssh
%endif
# Moved image-minimizer tool to lorax
Provides: appliance-tools-minimizer
%description
Lorax is a tool for creating the anaconda install images.
@ -85,6 +88,7 @@ make DESTDIR=$RPM_BUILD_ROOT mandir=%{_mandir} install
%{_sbindir}/lorax
%{_sbindir}/mkefiboot
%{_sbindir}/livemedia-creator
%{_bindir}/image-minimizer
%dir %{_sysconfdir}/lorax
%config(noreplace) %{_sysconfdir}/lorax/lorax.conf
%dir %{_datadir}/lorax

1
setup.py
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@ -18,6 +18,7 @@ for root, dnames, fnames in os.walk("share"):
# executable
data_files.append(("/usr/sbin", ["src/sbin/lorax", "src/sbin/mkefiboot",
"src/sbin/livemedia-creator"]))
data_files.append(("/usr/bin", ["src/bin/image-minimizer"]))
# get the version
sys.path.insert(0, "src")

198
src/bin/image-minimizer Executable file
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@ -0,0 +1,198 @@
#!/usr/bin/python
#
# image-minimizer: removes files and packages on the filesystem
#
# Copyright 2007-2010 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
import glob
import optparse
import os
import shutil
import sys
import rpm
class ImageMinimizer:
filename = ''
dryrun = False
verbose = False
prefix = None
drops = set()
visited = set()
drops_rpm = set()
ts = None
def __init__(self, filename, root, dryrun, verbose):
self.filename = filename
self.prefix = root
self.dryrun = dryrun
self.verbose = verbose
self.ts = None
# Recursively adds all files and directories.
# This is done becuase globbing does not allow
# ** for arbitrary nesting.
def add_directory(self, files, dirname):
self.visited.add(dirname)
for root, dirs, items in os.walk(dirname):
for dir in dirs:
self.visited.add(os.path.join(root, dir))
for name in items:
files.add(os.path.join(root, name))
def add_pattern(self, files, pattern):
globs = glob.glob(pattern)
if self.verbose and len(globs) == 0:
print "%s file not found" % pattern
for g in globs:
if os.path.isdir(g):
self.add_directory(files, g)
else:
files.add(g)
def add_pattern_rpm(self, rpms, pattern):
if self.ts is None:
if self.prefix is None:
raise Exception ('Must specify installation root for droprpm/keeprpm')
self.ts = rpm.TransactionSet(self.prefix)
mi = self.ts.dbMatch()
mi.pattern('name', rpm.RPMMIRE_GLOB, pattern)
not_found = True
for hdr in mi:
not_found = False
rpms.add(hdr['name'])
if self.verbose and not_found:
print "%s package not found" % pattern
# Parses each line in the ifle
def parse_line(self, line):
command = ""
pattern = ""
tok = line.split(None,1)
if len(tok) > 0:
command = tok[0].lower()
if len(tok) > 1:
pattern = tok[1].strip()
# Strip out all the comments and blank lines
if not (command.startswith('#') or command==''):
if command == 'keep':
if self.prefix is not None :
pattern = pattern.lstrip('/')
pattern = os.path.join(self.prefix, pattern)
keeps = set()
self.add_pattern(keeps, pattern)
self.drops.difference_update(keeps)
keeps = None
elif command == 'drop':
if self.prefix is not None :
pattern = pattern.lstrip('/')
pattern = os.path.join(self.prefix, pattern)
self.add_pattern(self.drops, pattern)
elif command == 'keeprpm':
keeps_rpm = set()
self.add_pattern_rpm(keeps_rpm, pattern)
self.drops_rpm.difference_update(keeps_rpm)
keeps_rpm = None
elif command == 'droprpm':
self.add_pattern_rpm(self.drops_rpm, pattern)
else:
raise Exception ('Unknown Command: ' + command)
def remove(self):
for tag in sorted(self.drops, reverse=True):
self.visited.add(os.path.split(tag)[0])
if os.path.isdir(tag):
self.visited.add(tag)
else:
if self.dryrun:
print 'rm ' + tag
else:
if self.verbose:
print 'rm ' + tag
os.remove(tag)
#remove all empty directory. Every 8k counts!
for dir in sorted(self.visited, reverse=True):
if len(os.listdir(dir)) == 0:
if self.dryrun:
print 'rm -rf ' + dir
else:
if self.verbose:
print 'rm -rf ' + dir
os.rmdir(dir)
def remove_rpm(self):
def runCallback(reason, amount, total, key, client_data):
if self.verbose and reason == rpm.RPMCALLBACK_UNINST_STOP:
print key, "erased"
if len(self.drops_rpm) == 0:
return
for pkg in self.drops_rpm:
if self.dryrun:
print "erasing ", pkg
else:
self.ts.addErase(pkg)
if not self.dryrun:
# skip ts.check(), equivalent to --nodeps
self.ts.run(runCallback, "erase")
def filter(self):
for line in (open(self.filename).readlines()):
self.parse_line(line.strip())
self.remove()
self.remove_rpm()
def parse_options():
usage = "usage: %prog [options] filename"
parser = optparse.OptionParser(usage=usage)
parser.set_defaults(root=os.environ.get('INSTALL_ROOT', '/mnt/sysimage/'), dry_run=False)
parser.add_option("-i", "--installroot", type="string", dest="root",
help="Root path to prepend to all file patterns and installation root for RPM "
"operations. Defaults to INSTALL_ROOT or /mnt/sysimage/")
parser.add_option("--dryrun", action="store_true", dest="dryrun",
help="If set, no filesystem changes are made.")
parser.add_option("-v", "--verbose", action="store_true", dest="verbose",
help="Display every action as it is performed.")
(options, args) = parser.parse_args()
if len(args) == 0:
parser.print_help()
sys.exit(1)
return (options, args)
if __name__ == "__main__":
try:
(options, args) = parse_options()
filename = args[0]
minimizer = ImageMinimizer(filename, options.root, options.dryrun,
options.verbose)
minimizer.filter()
except SystemExit, e:
sys.exit(e.code)
except KeyboardInterrupt, e:
print >> sys.stderr, _("Aborted at user request")
except Exception, e:
print e
sys.exit(1)