lorax/src/sbin/livemedia-creator

#!/usr/bin/python3
#
# Live Media Creator
#
# Copyright (C) 2011-2015  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; either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Author(s): Brian C. Lane <bcl@redhat.com>
#
import logging
log = logging.getLogger("livemedia-creator")
program_log = logging.getLogger("program")
pylorax_log = logging.getLogger("pylorax")

import os
import sys
import uuid
import tempfile
import subprocess
from time import sleep
import shutil
import argparse
import hashlib
import glob

# Use pykickstart to calculate disk image size
from pykickstart.parser import KickstartParser
from pykickstart.version import makeVersion

# Use Mako templates for appliance builder descriptions
from mako.template import Template
from mako.exceptions import text_error_template

# Use the Lorax treebuilder branch for iso creation
from pylorax import ArchData
from pylorax.base import DataHolder
from pylorax.treebuilder import TreeBuilder, RuntimeBuilder, udev_escape
from pylorax.treebuilder import findkernels
from pylorax.sysutils import joinpaths, remove
from pylorax.imgutils import PartitionMount, mksparse, mkext4img, loop_detach
from pylorax.imgutils import get_loop_name, dm_detach, mount, umount, Mount
from pylorax.imgutils import mksquashfs, mkqcow2, mktar, mkrootfsimg
from pylorax.imgutils import copytree
from pylorax.executils import execWithRedirect, execWithCapture, runcmd
from pylorax.monitor import LogMonitor

# no-virt mode doesn't need libvirt, so make it optional
try:
    import libvirt
except ImportError:
    libvirt = None

# Default parameters for rebuilding initramfs, override with --dracut-args
DRACUT_DEFAULT = ["--xz", "--add", "livenet dmsquash-live convertfs pollcdrom",
                  "--omit", "plymouth", "--no-hostonly", "--debug"]

ROOT_PATH = "/mnt/sysimage/"
RUNTIME = "images/install.img"

class InstallError(Exception):
    pass


class IsoMountpoint(object):
    """
    Mount the iso and check to make sure the vmlinuz and initrd.img files exist

    Also check the iso for a a stage2 image and set a flag and extract the
    iso's label.

    stage2 can be either LiveOS/squashfs.img or images/install.img
    """
    def __init__(self, iso_path, initrd_path=None):
        """
        Mount the iso

        :param str iso_path: Path to the iso to mount
        :param str initrd_path: Optional path to initrd

        initrd_path can be used to point to a tree with a newer
        initrd.img than the iso has. The iso is still used for stage2.

        self.kernel and self.initrd point to the kernel and initrd.
        self.stage2 is set to True if there is a stage2 image.
        self.repo is the path to the mounted iso if there is a /repodata dir.
        """
        self.label = None
        self.iso_path = iso_path
        self.initrd_path = initrd_path

        if not self.initrd_path:
            self.mount_dir = mount(self.iso_path, opts="loop")
        else:
            self.mount_dir = self.initrd_path

        self.kernel = self.mount_dir+"/isolinux/vmlinuz"
        self.initrd = self.mount_dir+"/isolinux/initrd.img"

        if os.path.isdir(self.mount_dir+"/repodata"):
            self.repo = self.mount_dir
        else:
            self.repo = None
        self.stage2 = os.path.exists(self.mount_dir+"/LiveOS/squashfs.img") or \
                      os.path.exists(self.mount_dir+"/images/install.img")

        try:
            for f in [self.kernel, self.initrd]:
                if not os.path.isfile(f):
                    raise Exception("Missing file on iso: {0}".format(f))
        except:
            self.umount()
            raise

        self.get_iso_label()

    def umount( self ):
        """Unmount the iso"""
        if not self.initrd_path:
            umount(self.mount_dir)

    def get_iso_label(self):
        """
        Get the iso's label using isoinfo

        Sets self.label if one is found
        """
        isoinfo_output = execWithCapture("isoinfo", ["-d", "-i", self.iso_path])
        log.debug(isoinfo_output)
        for line in isoinfo_output.splitlines():
            if line.startswith("Volume id: "):
                self.label = line[11:]
                return


class FakeDNF(object):
    """
    A minimal DNF object suitable for passing to RuntimeBuilder

    lmc uses RuntimeBuilder to run the arch specific iso creation
    templates, so the the installroot config value is the important part of
    this. Everything else should be a nop.
    """
    def __init__(self, conf):
        self.conf = conf

    def reset(self):
        pass


class VirtualInstall(object):
    """
    Run virt-install using an iso and a kickstart
    """
    def __init__(self, iso, ks_paths, disk_img, img_size=2048,
                 kernel_args=None, memory=1024, vnc=None, arch=None,
                 log_check=None, virtio_host="127.0.0.1", virtio_port=6080,
                 qcow2=False):
        """
        Start the installation

        :param iso: Information about the iso to use for the installation
        :type iso: IsoMountpoint
        :param list ks_paths: Paths to kickstart files. All are injected, the
           first one is the one executed.
        :param str disk_img: Path to a disk image, created it it doesn't exist
        :param int img_size: The image size, in MiB, to create if it doesn't exist
        :param str kernel_args: Extra kernel arguments to pass on the kernel cmdline
        :param int memory: Amount of RAM to assign to the virt, in MiB
        :param str vnc: Arguments to pass to virt-install --graphics
        :param str arch: Optional architecture to use in the virt
        :param log_check: Method that returns True if the installation fails
        :type log_check: method
        :param str virtio_host: Hostname to connect virtio log to
        :param int virtio_port: Port to connect virtio log to
        :param bool qcow2: Set to True if disk_img is a qcow2
        """
        self.virt_name = "LiveOS-"+str(uuid.uuid4())
        # add --graphics none later
        # add whatever serial cmds are needed later
        args = ["-n", self.virt_name,
                 "-r", str(memory),
                 "--noreboot",
                 "--noautoconsole"]

        args.append("--graphics")
        if vnc:
            args.append(vnc)
        else:
            args.append("none")

        for ks in ks_paths:
            args.append("--initrd-inject")
            args.append(ks)

        disk_opts = "path={0}".format(disk_img)
        if qcow2:
            disk_opts += ",format=qcow2"
        else:
            disk_opts += ",format=raw"
        if not os.path.isfile(disk_img):
            mksparse(disk_img, img_size * 1024**2)
        args.append("--disk")
        args.append(disk_opts)

        if iso.stage2:
            disk_opts = "path={0},device=cdrom,readonly=on,shareable=on".format(iso.iso_path)
            args.append("--disk")
            args.append(disk_opts)

        extra_args = "ks=file:/{0}".format(os.path.basename(ks_paths[0]))
        if not vnc:
            extra_args += " inst.cmdline"
        if kernel_args:
            extra_args += " "+kernel_args
        if iso.stage2:
            extra_args += " stage2=live:CDLABEL={0}".format(udev_escape(iso.label))
        args.append("--extra-args")
        args.append(extra_args)

        args.append("--location")
        args.append(iso.mount_dir)

        channel_args = "tcp,host={0}:{1},mode=connect,target_type=virtio" \
                       ",name=org.fedoraproject.anaconda.log.0".format(
                       virtio_host, virtio_port)
        args.append("--channel")
        args.append(channel_args)

        if arch:
            args.append("--arch")
            args.append(arch)

        log.info("Running virt-install.")
        try:
            execWithRedirect("virt-install", args, raise_err=True)
        except subprocess.CalledProcessError as e:
            raise InstallError("Problem starting virtual install: %s" % e)

        conn = libvirt.openReadOnly(None)
        dom = conn.lookupByName(self.virt_name)

        # TODO: If vnc has been passed, we should look up the port and print that
        # for the user at this point
        while dom.isActive() and not log_check():
            sys.stdout.write(".")
            sys.stdout.flush()
            sleep(10)
        print()

        if log_check():
            log.info("Installation error detected. See logfile.")
        else:
            log.info("Install finished. Or at least virt shut down.")

    def destroy(self):
        """
        Make sure the virt has been shut down and destroyed

        Could use libvirt for this instead.
        """
        log.info("Shutting down %s", self.virt_name)
        subprocess.call(["virsh", "destroy", self.virt_name])
        subprocess.call(["virsh", "undefine", self.virt_name])

def is_image_mounted(disk_img):
    """
    Check to see if the disk_img is mounted

    :returns: True if disk_img is in /proc/mounts
    :rtype: bool
    """
    with open("/proc/mounts") as mounts:
        for mnt in mounts:
            fields = mnt.split()
            if len(fields) > 2 and fields[1] == disk_img:
                return True
    return False

def find_ostree_root(phys_root):
    """
    Find root of ostree deployment

    :param str phys_root: Path to physical root
    :returns: Relative path of ostree deployment root
    :rtype: str
    :raise Exception: More than one deployment roots were found
    """
    ostree_root = ""
    ostree_sysroots = glob.glob(joinpaths(phys_root, "ostree/boot.0/*/*/0"))
    if ostree_sysroots:
        if len(ostree_sysroots) > 1:
            raise Exception("Too many deployment roots found: %s" % ostree_sysroots)
        ostree_root = os.path.relpath(ostree_sysroots[0], phys_root)
    return ostree_root

def get_arch(mount_dir):
    """
    Get the kernel arch

    :returns: Arch of first kernel found at mount_dir/boot/ or i386
    :rtype: str
    """
    kernels = findkernels(mount_dir)
    if not kernels:
        return "i386"
    return kernels[0].arch


def make_appliance(disk_img, name, template, outfile, networks=None, ram=1024,
                   vcpus=1, arch=None, title="Linux", project="Linux",
                   releasever="7.0"):
    """
    Generate an appliance description file

    :param str disk_img: Full path of the disk image
    :param str name: Name of the appliance, passed to the template
    :param str template: Full path of Mako template
    :param str outfile: Full path of file to write, using template
    :param list networks: List of networks(str) from the kickstart
    :param int ram: Ram, in MiB, passed to template. Default is 1024
    :param int vcpus: CPUs, passed to template. Default is 1
    :param str arch: CPU architecture. Default is 'x86_64'
    :param str title: Title, passed to template. Default is 'Linux'
    :param str project: Project, passed to template. Default is 'Linux'
    :param str releasever: Release version, passed to template. Default is 17
    """
    if not (disk_img and template and outfile):
        return None

    log.info("Creating appliance definition using %s", template)

    if not arch:
        arch = "x86_64"

    log.info("Calculating SHA256 checksum of %s", disk_img)
    sha256 = hashlib.sha256()
    with open(disk_img) as f:
        while True:
            data = f.read(1024**2)
            if not data:
                break
            sha256.update(data)
    log.info("SHA256 of %s is %s", disk_img, sha256.hexdigest())
    disk_info = DataHolder(name=os.path.basename(disk_img), format="raw",
                           checksum_type="sha256", checksum=sha256.hexdigest())
    try:
        result = Template(filename=template).render(disks=[disk_info], name=name,
                          arch=arch, memory=ram, vcpus=vcpus, networks=networks,
                          title=title, project=project, releasever=releasever)
    except Exception:
        log.error(text_error_template().render())
        raise

    with open(outfile, "w") as f:
        f.write(result)


def make_fsimage(diskimage, fsimage, img_size=None, label="Anaconda"):
    """
    Copy the / partition of a partitioned disk image to an un-partitioned
    disk image.

    :param str diskimage: The full path to partitioned disk image with a /
    :param str fsimage: The full path of the output fs image file
    :param int img_size: Optional size of the fsimage in MiB or None to make
       it as small as possible
    :param str label: The label to apply to the image. Defaults to "Anaconda"
    """
    with PartitionMount(diskimage) as img_mount:
        if not img_mount or not img_mount.mount_dir:
            return None

        log.info("Creating fsimage %s (%s)", fsimage, img_size or "minimized")
        if img_size:
            # convert to Bytes
            img_size *= 1024**2

        mkext4img(img_mount.mount_dir, fsimage, size=img_size, label=label)


def make_runtime(opts, mount_dir, work_dir):
    """
    Make the squashfs image from a directory

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str mount_dir: Directory tree to compress
    :param str work_dir: Output compressed image to work_dir+images/install.img
    """
    kernel_arch = get_arch(mount_dir)

    # Fake dnf  object
    fake_dbo = FakeDNF(conf=DataHolder(installroot=mount_dir))
    # Fake arch with only basearch set
    arch = ArchData(kernel_arch)
    # TODO: Need to get release info from someplace...
    product = DataHolder(name=opts.project, version=opts.releasever, release="",
                            variant="", bugurl="", isfinal=False)

    # This is a mounted image partition, cannot hardlink to it, so just use it
    # symlink mount_dir/images to work_dir/images so we don't run out of space
    os.makedirs(joinpaths(work_dir, "images"))

    rb = RuntimeBuilder(product, arch, fake_dbo)
    log.info("Creating runtime")
    rb.create_runtime(joinpaths(work_dir, RUNTIME), size=None)

def rebuild_initrds_for_live(opts, sys_root_dir, results_dir):
    """
    Rebuild intrds for pxe live image (root=live:http://)

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str sys_root_dir: Path to root of the system
    :param str results_dir: Path of directory for storing results
    """
    if not opts.dracut_args:
        dracut_args = DRACUT_DEFAULT
    else:
        dracut_args = []
        for arg in opts.dracut_args:
            dracut_args += arg.split(" ", 1)
    log.info("dracut args = %s", dracut_args)

    dracut = ["dracut", "--nomdadmconf", "--nolvmconf"] + dracut_args

    kdir = "boot"
    if opts.ostree:
        kernels_dir = glob.glob(joinpaths(sys_root_dir, "boot/ostree/*"))[0]
        kdir = os.path.relpath(kernels_dir, sys_root_dir)

    kernels = [kernel for kernel in findkernels(sys_root_dir, kdir)
               if hasattr(kernel, "initrd")]
    if not kernels:
        raise Exception("No initrds found, cannot rebuild_initrds")

    # Hush some dracut warnings. TODO: bind-mount proc in place?
    open(joinpaths(sys_root_dir,"/proc/modules"),"w")

    if opts.ostree:
        # Dracut assumes to have some dirs in disk image
        # /var/tmp for temp files
        vartmp_dir = joinpaths(sys_root_dir, "var/tmp")
        if not os.path.isdir(vartmp_dir):
            os.mkdir(vartmp_dir)
        # /root (maybe not fatal)
        root_dir = joinpaths(sys_root_dir, "var/roothome")
        if not os.path.isdir(root_dir):
            os.mkdir(root_dir)
        # /tmp (maybe not fatal)
        tmp_dir = joinpaths(sys_root_dir, "sysroot/tmp")
        if not os.path.isdir(tmp_dir):
            os.mkdir(tmp_dir)

    for kernel in kernels:
        outfile = kernel.initrd.path + ".live"
        log.info("rebuilding %s", outfile)

        kver = kernel.version

        cmd = dracut + [outfile, kver]
        runcmd(cmd, root=sys_root_dir)

        new_initrd_path = joinpaths(results_dir, os.path.basename(kernel.initrd.path))
        shutil.move(joinpaths(sys_root_dir, outfile), new_initrd_path)
        os.chmod(new_initrd_path, 0o644)
        shutil.copy2(joinpaths(sys_root_dir, kernel.path), results_dir)

    os.unlink(joinpaths(sys_root_dir,"/proc/modules"))

def create_pxe_config(template, images_dir, live_image_name, add_args = None):
    """
    Create template for pxe to live configuration

    :param str images_dir: Path of directory with images to be used
    :param str live_image_name: Name of live rootfs image file
    :param list add_args: Arguments to be added to initrd= pxe config
    """

    add_args = add_args or []

    kernels = [kernel for kernel in findkernels(images_dir, kdir="")
               if hasattr(kernel, "initrd")]
    if not kernels:
        return

    kernel = kernels[0]

    add_args_str = " ".join(add_args)


    try:
        result = Template(filename=template).render(kernel=kernel.path,
                          initrd=kernel.initrd.path, liveimg=live_image_name,
                          addargs=add_args_str)
    except Exception:
        log.error(text_error_template().render())
        raise

    with open (joinpaths(images_dir, "PXE_CONFIG"), "w") as f:
        f.write(result)

def make_livecd(opts, mount_dir, work_dir):
    """
    Take the content from the disk image and make a livecd out of it

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str mount_dir: Directory tree to compress
    :param str work_dir: Output compressed image to work_dir+images/install.img

    This uses wwood's squashfs live initramfs method:
     * put the real / into LiveOS/rootfs.img
     * make a squashfs of the LiveOS/rootfs.img tree
     * This is loaded by dracut when the cmdline is passed to the kernel:
       root=live:CDLABEL=<volid> rd.live.image
    """
    kernel_arch = get_arch(mount_dir)

    arch = ArchData(kernel_arch)
    # TODO: Need to get release info from someplace...
    product = DataHolder(name=opts.project, version=opts.releasever, release="",
                            variant="", bugurl="", isfinal=False)

    # Link /images to work_dir/images to make the templates happy
    if os.path.islink(joinpaths(mount_dir, "images")):
        os.unlink(joinpaths(mount_dir, "images"))
    execWithRedirect("/bin/ln", ["-s", joinpaths(work_dir, "images"),
                                 joinpaths(mount_dir, "images")])

    # The templates expect the config files to be in /tmp/config_files
    # I think these should be release specific, not from lorax, but for now
    configdir = joinpaths(opts.lorax_templates,"live/config_files/")
    configdir_path = "tmp/config_files"
    fullpath = joinpaths(mount_dir, configdir_path)
    if os.path.exists(fullpath):
        remove(fullpath)
    copytree(configdir, fullpath)

    isolabel = opts.volid or "{0.name}-{0.version}-{1.basearch}".format(product, arch)
    if len(isolabel) > 32:
        isolabel = isolabel[:32]
        log.warn("Truncating isolabel to 32 chars: %s", isolabel)

    tb = TreeBuilder(product=product, arch=arch, domacboot=opts.domacboot,
                     inroot=mount_dir, outroot=work_dir,
                     runtime=RUNTIME, isolabel=isolabel,
                     templatedir=joinpaths(opts.lorax_templates,"live/"))
    log.info("Rebuilding initrds")
    if not opts.dracut_args:
        dracut_args = DRACUT_DEFAULT
    else:
        dracut_args = []
        for arg in opts.dracut_args:
            dracut_args += arg.split(" ", 1)
    log.info("dracut args = %s", dracut_args)
    tb.rebuild_initrds(add_args=dracut_args)
    log.info("Building boot.iso")
    tb.build()

    return work_dir

def mount_boot_part_over_root(img_mount):
    """
    Mount boot partition to /boot of root fs mounted in img_mount

    Used for OSTree so it finds deployment configurations on live rootfs

    param img_mount: object with mounted disk image root partition
    type img_mount: imgutils.PartitionMount
    """
    root_dir = img_mount.mount_dir
    is_boot_part = lambda dir: os.path.exists(dir+"/loader.0")
    tmp_mount_dir = tempfile.mkdtemp()
    sys_root = find_ostree_root(root_dir)
    sysroot_boot_dir = None
    for dev, _size in img_mount.loop_devices:
        if dev is img_mount.mount_dev:
            continue
        try:
            mount("/dev/mapper/"+dev, mnt=tmp_mount_dir)
            if is_boot_part(tmp_mount_dir):
                umount(tmp_mount_dir)
                sysroot_boot_dir = joinpaths(joinpaths(root_dir, sys_root), "boot")
                mount("/dev/mapper/"+dev, mnt=sysroot_boot_dir)
                break
            else:
                umount(tmp_mount_dir)
        except subprocess.CalledProcessError as e:
            log.debug("Looking for boot partition error: %s", e)
    remove(tmp_mount_dir)
    return sysroot_boot_dir

def novirt_log_check(log_check, proc):
    """
    Check to see if there has been an error in the logs

    :param log_check: method to call to check for an error in the logs
    :param proc: Popen object for the anaconda process
    :returns: True if the process has been terminated

    The log_check method should return a True if an error has been detected.
    When an error is detected the process is terminated and this returns True
    """
    if log_check():
        proc.terminate()
        return True
    return False


def novirt_install(opts, disk_img, disk_size, repo_url):
    """
    Use Anaconda to install to a disk image

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str disk_img: The full path to the disk image to be created
    :param int disk_size: The size of the disk_img in MiB
    :param str repo_url: The url of the repository to use for the installation

    This method makes sure SELinux is permissive during the install, runs anaconda
    to create the image and then based on the opts passed create a qcow2 image
    or tarfile.
    """
    import selinux

    # Set selinux to Permissive if it is Enforcing
    selinux_enforcing = False
    if selinux.is_selinux_enabled() and selinux.security_getenforce():
        selinux_enforcing = True
        selinux.security_setenforce(0)

    # Clean up /tmp/ from previous runs to prevent stale info from being used
    for path in ["/tmp/yum.repos.d/", "/tmp/yum.cache/"]:
        if os.path.isdir(path):
            shutil.rmtree(path)

    args = ["--kickstart", opts.ks[0], "--cmdline", "--repo", repo_url]
    if opts.anaconda_args:
        for arg in opts.anaconda_args:
            args += arg.split(" ", 1)
    if opts.proxy:
        args += ["--proxy", opts.proxy]
    if opts.armplatform:
        args += ["--armplatform", opts.armplatform]

    if opts.make_iso or opts.make_fsimage:
        # Make a blank fs image
        args += ["--dirinstall"]

        mkext4img(None, disk_img, label=opts.fs_label, size=disk_size * 1024**2)
        if not os.path.isdir(ROOT_PATH):
            os.mkdir(ROOT_PATH)
        mount(disk_img, opts="loop", mnt=ROOT_PATH)
    elif opts.make_tar:
        args += ["--dirinstall"]

        # Install directly into ROOT_PATH, make sure it starts clean
        if os.path.exists(ROOT_PATH):
            shutil.rmtree(ROOT_PATH)
        if not os.path.isdir(ROOT_PATH):
            os.mkdir(ROOT_PATH)
    else:
        args += ["--image", disk_img]

        # Create the sparse image
        mksparse(disk_img, disk_size * 1024**2)

    log_monitor = LogMonitor(timeout=opts.timeout)
    args += ["--remotelog", "%s:%s" % (log_monitor.host, log_monitor.port)]

    # Make sure anaconda has the right product and release
    os.environ["ANACONDA_PRODUCTNAME"] = opts.project
    os.environ["ANACONDA_PRODUCTVERSION"] = opts.releasever
    log.info("Running anaconda.")
    try:
        execWithRedirect("anaconda", args, raise_err=True,
                         callback=lambda p: not novirt_log_check(log_monitor.server.log_check, p))

        # Make sure the new filesystem is correctly labeled
        args = ["-e", "/proc", "-e", "/sys", "-e", "/dev",
                "/etc/selinux/targeted/contexts/files/file_contexts", "/"]
        if opts.make_iso or opts.make_fsimage or opts.make_tar:
            execWithRedirect("setfiles", args, root=ROOT_PATH)
        else:
            with PartitionMount(disk_img) as img_mount:
                if img_mount and img_mount.mount_dir:
                    execWithRedirect("setfiles", args, root=img_mount.mount_dir)
    except subprocess.CalledProcessError as e:
        log.error("Running anaconda failed: %s", e)
        raise InstallError("novirt_install failed")
    finally:
        log_monitor.shutdown()

        # Move the anaconda logs over to a log directory
        log_dir = os.path.abspath(os.path.dirname(opts.logfile))
        log_anaconda = joinpaths(log_dir, "anaconda")
        if not os.path.isdir(log_anaconda):
            os.mkdir(log_anaconda)
        for l in glob.glob("/tmp/*log")+glob.glob("/tmp/anaconda-tb-*"):
            shutil.copy2(l, log_anaconda)
            os.unlink(l)

        if opts.make_iso or opts.make_fsimage:
            umount(ROOT_PATH)
        else:
            # If anaconda failed the disk image may still be in use by dm
            execWithRedirect("anaconda-cleanup", [])
            dm_name = os.path.splitext(os.path.basename(disk_img))[0]
            dm_path = "/dev/mapper/"+dm_name
            if os.path.exists(dm_path):
                dm_detach(dm_path)
                loop_detach(get_loop_name(disk_img))

        if selinux_enforcing:
            selinux.security_setenforce(1)

    if opts.qcow2:
        log.info("Converting %s to qcow2", disk_img)
        qcow2_args = []
        for arg in opts.qcow2_args:
            qcow2_args += arg.split(" ", 1)

        # convert the image to qcow2 format
        if "-O" not in qcow2_args:
            qcow2_args.extend(["-O", "qcow2"])
        qcow2_img = tempfile.mktemp(prefix="disk", suffix=".img")
        execWithRedirect("qemu-img", ["convert"] + qcow2_args + [disk_img, qcow2_img], raise_err=True)
        execWithRedirect("mv", ["-f", qcow2_img, disk_img], raise_err=True)
    elif opts.make_tar:
        compress_args = []
        for arg in opts.compress_args:
            compress_args += arg.split(" ", 1)

        rc = mktar(ROOT_PATH, disk_img, opts.compression, compress_args)
        shutil.rmtree(ROOT_PATH)

        if rc:
            raise InstallError("novirt_install mktar failed: rc=%s" % rc)


def virt_install(opts, install_log, disk_img, disk_size):
    """
    Use virt-install to install to a disk image

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str install_log: The path to write the log from virt-install
    :param str disk_img: The full path to the disk image to be created
    :param int disk_size: The size of the disk_img in MiB

    This uses virt-install with a boot.iso and a kickstart to create a disk
    image and then optionally, based on the opts passed, creates tarfile.
    """
    iso_mount = IsoMountpoint(opts.iso, opts.location)
    log_monitor = LogMonitor(install_log, timeout=opts.timeout)

    kernel_args = ""
    if opts.kernel_args:
        kernel_args += opts.kernel_args
    if opts.proxy:
        kernel_args += " proxy="+opts.proxy

    if opts.qcow2 and not opts.make_fsimage:
        # virt-install can't take all the qcow2 options so create the image first
        qcow2_args = []
        for arg in opts.qcow2_args:
            qcow2_args += arg.split(" ", 1)

        mkqcow2(disk_img, disk_size*1024**2, qcow2_args)

    if opts.make_fsimage or opts.make_tar:
        diskimg_path = tempfile.mktemp(prefix="disk", suffix=".img")
    else:
        diskimg_path = disk_img

    try:
        virt = VirtualInstall(iso_mount, opts.ks, diskimg_path, disk_size,
                               kernel_args, opts.ram, opts.vnc, opts.arch,
                               log_check = log_monitor.server.log_check,
                               virtio_host = log_monitor.host,
                               virtio_port = log_monitor.port,
                               qcow2=opts.qcow2)

        virt.destroy()
        log_monitor.shutdown()
    except InstallError as e:
        log.error("VirtualInstall failed: %s", e)
        raise
    finally:
        log.info("unmounting the iso")
        iso_mount.umount()

    if log_monitor.server.log_check():
        if not log_monitor.server.error_line and opts.timeout:
            msg = "virt_install failed due to timeout"
        else:
            msg = "virt_install failed on line: %s" % log_monitor.server.error_line
        raise InstallError(msg)

    if opts.make_fsimage:
        make_fsimage(diskimg_path, disk_img, disk_size, label=opts.fs_label)
        os.unlink(diskimg_path)
    elif opts.make_tar:
        compress_args = []
        for arg in opts.compress_args:
            compress_args += arg.split(" ", 1)

        with PartitionMount(diskimg_path) as img_mount:
            if img_mount and img_mount.mount_dir:
                rc = mktar(img_mount.mount_dir, disk_img, opts.compression, compress_args)
        os.unlink(diskimg_path)

        if rc:
            raise InstallError("virt_install failed")


def make_squashfs(disk_img, work_dir, compression="xz"):
    """
    Create a squashfs image of an unpartitioned filesystem disk image

    :param str disk_img: Path to the unpartitioned filesystem disk image
    :param str work_dir: Output compressed image to work_dir+images/install.img
    :param str compression: Compression type to use

    Take disk_img and put it into LiveOS/rootfs.img and squashfs this
    tree into work_dir+images/install.img
    """
    liveos_dir = joinpaths(work_dir, "runtime/LiveOS")
    os.makedirs(liveos_dir)
    os.makedirs(os.path.dirname(joinpaths(work_dir, RUNTIME)))

    rc = execWithRedirect("/bin/ln", [disk_img, joinpaths(liveos_dir, "rootfs.img")])
    if rc != 0:
        shutil.copy2(disk_img, joinpaths(liveos_dir, "rootfs.img"))

    mksquashfs(joinpaths(work_dir, "runtime"),
               joinpaths(work_dir, RUNTIME), compression)
    remove(joinpaths(work_dir, "runtime"))


def make_image(opts, ks):
    """
    Install to a disk image

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str ks: Path to the kickstart to use for the installation
    :returns: Path of the image created
    :rtype: str

    Use virt-install or anaconda to install to a disk image.
    """
    disk_size = 2 + sum(p.size for p in ks.handler.partition.partitions)
    log.info("disk_size = %sMiB", disk_size)

    if opts.image_name:
        disk_img = joinpaths(opts.result_dir, opts.image_name)
    else:
        disk_img = tempfile.mktemp(prefix="disk", suffix=".img", dir=opts.result_dir)
    log.info("disk_img = %s", disk_img)

    try:
        if opts.no_virt:
            method = ks.handler.method
            if method.method == "url":
                repo_url = method.url
            elif method.method == "nfs":
                if method.opts:
                    repo_url = "nfs:%s:%s:%s" % (method.opts, method.server, method.dir)
                else:
                    repo_url = "nfs:%s:%s" % (method.server, method.dir)
            else:
                raise InstallError("Unsupported installation method: %s" % method.method)

            novirt_install(opts, disk_img, disk_size, repo_url)
        else:
            install_log = os.path.abspath(os.path.dirname(opts.logfile))+"/virt-install.log"
            log.info("install_log = %s", install_log)

            virt_install(opts, install_log, disk_img, disk_size)
    except InstallError as e:
        log.error("Install failed: %s", e)
        if not opts.keep_image and os.path.exists(disk_img):
            log.info("Removing bad disk image")
            os.unlink(disk_img)
        raise

    log.info("Disk Image install successful")
    return disk_img


def make_live_images(opts, work_dir, root_dir, rootfs_image=None, size=None):
    """
    Create live images from direcory or rootfs image

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    :param str work_dir: Directory for storing results
    :param str root_dir: Root directory of live filesystem tree
    :param str rootfs_image: Path to live rootfs image to be used
    :returns: Path of directory with created images
    :rtype: str
    """
    sys_root = ""
    if opts.ostree:
        sys_root = find_ostree_root(root_dir)

    squashfs_root_dir = joinpaths(work_dir, "squashfs_root")
    liveos_dir = joinpaths(squashfs_root_dir, "LiveOS")
    os.makedirs(liveos_dir)

    if rootfs_image:
        rc = execWithRedirect("/bin/ln", [rootfs_image, joinpaths(liveos_dir, "rootfs.img")])
        if rc != 0:
            shutil.copy2(rootfs_image, joinpaths(liveos_dir, "rootfs.img"))
    else:
        log.info("Creating live rootfs image")
        mkrootfsimg(root_dir, joinpaths(liveos_dir, "rootfs.img"), "LiveOS", size=size, sysroot=sys_root)

    log.info("Packing live rootfs image")
    add_pxe_args = []
    live_image_name = "live-rootfs.squashfs.img"
    mksquashfs(squashfs_root_dir,
                joinpaths(work_dir, live_image_name),
                opts.compression,
                opts.compress_args)

    remove(squashfs_root_dir)

    log.info("Rebuilding initramfs for live")
    rebuild_initrds_for_live(opts, joinpaths(root_dir, sys_root), work_dir)

    if opts.ostree:
        add_pxe_args.append("ostree=/%s" % sys_root)
    template = joinpaths(opts.lorax_templates, "pxe-live/pxe-config.tmpl")
    create_pxe_config(template, work_dir, live_image_name, add_pxe_args)

    return work_dir


def setup_logging(opts):
    """
    Setup the various logs

    :param opts: options passed to livemedia-creator
    :type opts: argparse options
    """
    if not os.path.isdir(os.path.abspath(os.path.dirname(opts.logfile))):
        os.makedirs(os.path.abspath(os.path.dirname(opts.logfile)))

    # Setup logging to console and to logfile
    log.setLevel(logging.DEBUG)
    pylorax_log.setLevel(logging.DEBUG)

    sh = logging.StreamHandler()
    sh.setLevel(logging.INFO)
    fmt = logging.Formatter("%(asctime)s: %(message)s")
    sh.setFormatter(fmt)
    log.addHandler(sh)
    pylorax_log.addHandler(sh)

    fh = logging.FileHandler(filename=opts.logfile, mode="w")
    fh.setLevel(logging.DEBUG)
    fmt = logging.Formatter("%(asctime)s %(levelname)s %(name)s: %(message)s")
    fh.setFormatter(fmt)
    log.addHandler(fh)
    pylorax_log.addHandler(fh)

    # External program output log
    program_log.setLevel(logging.DEBUG)
    logfile = os.path.abspath(os.path.dirname(opts.logfile))+"/program.log"
    fh = logging.FileHandler(filename=logfile, mode="w")
    fh.setLevel(logging.DEBUG)
    program_log.addHandler(fh)


def main():
    parser = argparse.ArgumentParser(description="Create Live Install Media",
                                     fromfile_prefix_chars="@")

    # These are mutually exclusive, one is required
    action = parser.add_mutually_exclusive_group(required=True)
    action.add_argument("--make-iso", action="store_true",
                        help="Build a live iso")
    action.add_argument("--make-disk", action="store_true",
                        help="Build a partitioned disk image")
    action.add_argument("--make-fsimage", action="store_true",
                        help="Build a filesystem image")
    action.add_argument("--make-appliance", action="store_true",
                        help="Build an appliance image and XML description")
    action.add_argument("--make-ami", action="store_true",
                        help="Build an ami image")
    action.add_argument("--make-tar", action="store_true",
                        help="Build a tar of the root filesystem")
    action.add_argument("--make-pxe-live", action="store_true",
                        help="Build a live pxe boot squashfs image")
    action.add_argument("--make-ostree-live", action="store_true",
                        help="Build a live pxe boot squashfs image of Atomic Host")

    parser.add_argument("--iso", type=os.path.abspath,
                        help="Anaconda installation .iso path to use for virt-install")
    parser.add_argument("--ks", action="append", type=os.path.abspath,
                        help="Kickstart file defining the install.")
    parser.add_argument("--image-only", action="store_true",
                        help="Exit after creating fs/disk image.")

    parser.add_argument("--no-virt", action="store_true",
                        help="Use Anaconda's image install instead of virt-install")
    parser.add_argument("--proxy",
                        help="proxy URL to use for the install")
    parser.add_argument("--anaconda-arg", action="append", dest="anaconda_args",
                        help="Additional argument to pass to anaconda (no-virt "
                             "mode). Pass once for each argument")
    parser.add_argument("--armplatform",
                        help="the platform to use when creating images for ARM, "
                             "i.e., highbank, mvebu, omap, tegra, etc.")
    parser.add_argument("--location", default=None, type=os.path.abspath,
                        help="location of iso directory tree with initrd.img "
                             "and vmlinuz. Used to run virt-install with a "
                             "newer initrd than the iso.")

    parser.add_argument("--logfile", default="./livemedia.log",
                        type=os.path.abspath,
                        help="Path to logfile")
    parser.add_argument("--lorax-templates", default="/usr/share/lorax/",
                        type=os.path.abspath,
                        help="Path to mako templates for lorax")
    parser.add_argument("--tmp", default="/var/tmp", type=os.path.abspath,
                        help="Top level temporary directory")
    parser.add_argument("--resultdir", default=None, dest="result_dir",
                        type=os.path.abspath,
                        help="Directory to copy the resulting images and iso into. "
                             "Defaults to the temporary working directory")

    parser.add_argument("--macboot", action="store_true", default=True,
                        dest="domacboot")
    parser.add_argument("--nomacboot", action="store_false",
                        dest="domacboot")

    image_group = parser.add_argument_group("disk/fs image arguments")
    image_group.add_argument("--disk-image", type=os.path.abspath,
                             help="Path to existing disk image to use for creating final image.")
    image_group.add_argument("--keep-image", action="store_true",
                             help="Keep raw disk image after .iso creation")
    image_group.add_argument("--fs-image", type=os.path.abspath,
                             help="Path to existing filesystem image to use for creating final image.")
    image_group.add_argument("--image-name", default=None,
                             help="Name of output file to create. Used for tar, fs and disk image. Default is a random name.")
    image_group.add_argument("--fs-label", default="Anaconda",
                             help="Label to set on fsimage, default is 'Anaconda'")
    image_group.add_argument("--qcow2", action="store_true",
                             help="Create qcow2 image instead of raw sparse image when making disk images.")
    image_group.add_argument("--qcow2-arg", action="append", dest="qcow2_args", default=[],
                             help="Arguments to pass to qemu-img. Pass once for each argument")
    image_group.add_argument("--compression", default="xz",
                             help="Compression binary for make-tar. xz, lzma, gzip, and bzip2 are supported. xz is the default.")
    image_group.add_argument("--compress-arg", action="append", dest="compress_args", default=[],
                             help="Arguments to pass to compression. Pass once for each argument")
    # Group of arguments for appliance creation
    app_group = parser.add_argument_group("appliance arguments")
    app_group.add_argument("--app-name", default=None,
                           help="Name of appliance to pass to template")
    app_group.add_argument("--app-template", default=None,
                           help="Path to template to use for appliance data.")
    app_group.add_argument("--app-file", default="appliance.xml",
                           help="Appliance template results file.")

    # Group of arguments to pass to virt-install
    if not libvirt:
        virt_group = parser.add_argument_group("virt-install arguments (DISABLED -- no libvirt)")
    else:
        virt_group = parser.add_argument_group("virt-install arguments")
    virt_group.add_argument("--ram", metavar="MEMORY", type=int, default=1024,
                            help="Memory to allocate for installer in megabytes.")
    virt_group.add_argument("--vcpus", default=1,
                            help="Passed to --vcpus command")
    virt_group.add_argument("--vnc",
                            help="Passed to --graphics command")
    virt_group.add_argument("--arch", default=None,
                            help="Passed to --arch command")
    virt_group.add_argument("--kernel-args",
                            help="Additional argument to pass to the installation kernel")

    # dracut arguments
    dracut_group = parser.add_argument_group("dracut arguments")
    dracut_group.add_argument("--dracut-arg", action="append", dest="dracut_args",
                              help="Argument to pass to dracut when "
                                   "rebuilding the initramfs. Pass this "
                                   "once for each argument. NOTE: this "
                                   "overrides the default. (default: %s)" % (DRACUT_DEFAULT,))

    # pxe to live arguments
    pxelive_group = parser.add_argument_group("pxe to live arguments")
    pxelive_group.add_argument("--live-rootfs-size", type=int, default=0,
                                help="Size of root filesystem of live image in GiB")
    pxelive_group.add_argument("--live-rootfs-keep-size", action="store_true",
                                help="Keep the original size of root filesystem in live image")


    parser.add_argument("--title", default="Linux Live Media",
                        help="Substituted for @TITLE@ in bootloader config files")
    parser.add_argument("--project", default="Linux",
                        help="substituted for @PROJECT@ in bootloader config files")
    parser.add_argument("--releasever", default="22",
                        help="substituted for @VERSION@ in bootloader config files")
    parser.add_argument("--volid", default=None, help="volume id")
    parser.add_argument("--squashfs_args",
                        help="additional squashfs args")
    parser.add_argument("--timeout", default=None, type=int,
                        help="Cancel installer after X minutes")

    opts = parser.parse_args()

    setup_logging(opts)

    log.debug( opts )

    # Check for invalid combinations of options, print all the errors and exit.
    errors = []
    if not opts.disk_image and not opts.fs_image and not opts.ks:
        errors.append("Image creation requires a kickstart file")

    if opts.ks and not os.path.exists(opts.ks[0]):
        errors.append("kickstart file (%s) is missing." % opts.ks[0])

    if opts.make_iso and not os.path.exists( opts.lorax_templates):
        errors.append("The lorax templates directory (%s) doesn't "
                      "exist." % opts.lorax_templates)

    if opts.result_dir and os.path.exists(opts.result_dir):
        errors.append("The results_dir (%s) should not exist, please delete or "
                      "move its contents" % opts.result_dir)

    if opts.iso and not os.path.exists(opts.iso):
        errors.append("The iso %s is missing." % opts.iso)

    if opts.disk_image and not os.path.exists(opts.disk_image):
        errors.append("The disk image %s is missing." % opts.disk_image)

    if opts.fs_image and not os.path.exists(opts.fs_image):
        errors.append("The filesystem image %s is missing." % opts.fs_image)

    is_install = not (opts.disk_image or opts.fs_image)
    if is_install and not opts.no_virt and not opts.iso:
        errors.append("virt install needs an install iso.")

    if opts.volid and len(opts.volid) > 32:
        errors.append("the volume id cannot be longer than 32 characters")

    if is_install and not opts.no_virt and not libvirt:
        errors.append("virt install requires libvirt-python3 to be installed.")

    if is_install and not opts.no_virt \
       and not os.path.exists("/usr/bin/virt-install"):
        errors.append("virt-install needs to be installed.")

    if is_install and opts.no_virt \
       and not os.path.exists("/usr/sbin/anaconda"):
        errors.append("no-virt requires anaconda to be installed.")

    if opts.make_appliance and not opts.app_template:
        opts.app_template = joinpaths(opts.lorax_templates,
                                            "appliance/libvirt.tmpl")

    if opts.make_appliance and not os.path.exists(opts.app_template):
        errors.append("The appliance template (%s) doesn't "
                      "exist" % opts.app_template)

    if opts.image_name and os.path.exists(joinpaths(opts.result_dir, opts.image_name)):
        errors.append("The disk image to be created should not exist.")

    if opts.qcow2 and not os.path.exists("/usr/bin/qemu-img"):
        errors.append("qcow2 requires the qemu-img utility to be installed.")

    if opts.qcow2 and opts.make_iso:
        errors.append("qcow2 cannot be used to make a bootable iso.")

    if opts.make_fsimage and opts.qcow2:
        errors.append("qcow2 cannot be used to make filesystem images.")

    if opts.make_tar and opts.qcow2:
        errors.append("qcow2 cannot be used to make a tar.")

    if os.getuid() != 0:
        errors.append("You need to run this as root")

    if errors:
        list(log.error(e) for e in errors)
        sys.exit(1)

    # Default to putting results into tmp
    if not opts.result_dir:
        opts.result_dir = opts.tmp
    else:
        os.makedirs(opts.result_dir)

    # AMI image is just a fsimage with an AMI label
    if opts.make_ami:
        opts.make_fsimage = True
        if not opts.image_name:
            opts.image_name = "ami-root.img"
        if opts.fs_label == "Anaconda":
            opts.fs_label = "AMI"
    elif opts.make_tar:
        if not opts.image_name:
            opts.image_name = "root.tar.xz"
        if opts.compression == "xz" and not opts.compress_args:
            opts.compress_args = ["-9"]

    if opts.app_file:
        opts.app_file = joinpaths(opts.result_dir, opts.app_file)

    if opts.make_ostree_live:
        opts.make_pxe_live = True
        opts.ostree = True
    else:
        opts.ostree = False

    tempfile.tempdir = opts.tmp
    disk_img = None

    # Parse the kickstart
    if opts.ks:
        ks_version = makeVersion()
        ks = KickstartParser(ks_version, errorsAreFatal=False, missingIncludeIsFatal=False)
        ks.readKickstart(opts.ks[0])

    # Make the disk or filesystem image
    if not opts.disk_image and not opts.fs_image:
        errors = []
        if opts.no_virt and ks.handler.method.method not in ("url", "nfs"):
            errors.append("Only url and nfs  install methods are currently supported. Please "
                          "fix your kickstart file." )

        if ks.handler.displaymode.displayMode is not None:
            errors.append("The kickstart must not set a display mode (text, cmdline, "
                          "graphical), this will interfere with livemedia-creator.")

        if opts.make_fsimage:
            # Make sure the kickstart isn't using autopart and only has a / mountpoint
            part_ok = not any(p for p in ks.handler.partition.partitions
                                 if p.mountpoint not in ["/", "swap"])
            if not part_ok or ks.handler.autopart.seen:
                errors.append("Filesystem images must use a single / part, not autopart or "
                              "multiple partitions. swap is allowed but not used.")

        if errors:
            list(log.error(e) for e in errors)
            sys.exit(1)

        # Make the image. Output of this is either a partitioned disk image or a fsimage
        try:
            disk_img = make_image(opts, ks)
        except InstallError as e:
            log.error("ERROR: Image creation failed: %s", e)
            sys.exit(1)

    if not opts.image_only:
        result_dir = None
        if opts.make_iso:
            work_dir = tempfile.mkdtemp()
            log.info("working dir is %s", work_dir)

            if (opts.fs_image or opts.no_virt) and not opts.disk_image:
                # Create iso from a filesystem image
                disk_img = opts.fs_image or disk_img

                make_squashfs(disk_img, work_dir)
                with Mount(disk_img, opts="loop") as mount_dir:
                    result_dir = make_livecd(opts, mount_dir, work_dir)
            else:
                # Create iso from a partitioned disk image
                disk_img = opts.disk_image or disk_img
                with PartitionMount(disk_img) as img_mount:
                    if img_mount and img_mount.mount_dir:
                        make_runtime(opts, img_mount.mount_dir, work_dir)
                        result_dir = make_livecd(opts, img_mount.mount_dir, work_dir)

            # cleanup the mess
            # cleanup work_dir?
            if disk_img and not (opts.keep_image or opts.disk_image or opts.fs_image):
                os.unlink(disk_img)
                log.info("Disk image erased")
                disk_img = None
        elif opts.make_appliance:
            if not opts.ks:
                networks = []
            else:
                networks = ks.handler.network.network
            make_appliance(opts.disk_image or disk_img, opts.app_name,
                           opts.app_template, opts.app_file, networks, opts.ram,
                           opts.vcpus, opts.arch, opts.title, opts.project, opts.releasever)
        elif opts.make_pxe_live:
            work_dir = tempfile.mkdtemp()
            log.info("working dir is %s", work_dir)

            if (opts.fs_image or opts.no_virt) and not opts.disk_image:
                # Create pxe live images from a filesystem image
                disk_img = opts.fs_image or disk_img
                with Mount(disk_img, opts="loop") as mnt_dir:
                    result_dir = make_live_images(opts, work_dir, mnt_dir, rootfs_image=disk_img)
            else:
                # Create pxe live images from a partitioned disk image
                disk_img = opts.disk_image or disk_img
                is_root_part = None
                if opts.ostree:
                    is_root_part = lambda dir: os.path.exists(dir+"/ostree/deploy")
                with PartitionMount(disk_img, mount_ok=is_root_part) as img_mount:
                    if img_mount and img_mount.mount_dir:
                        try:
                            mounted_sysroot_boot_dir = None
                            if opts.ostree:
                                mounted_sysroot_boot_dir = mount_boot_part_over_root(img_mount)
                            if opts.live_rootfs_keep_size:
                                size = img_mount.mount_size / 1024**3
                            else:
                                size = opts.live_rootfs_size or None
                            result_dir = make_live_images(opts, work_dir, img_mount.mount_dir, size=size)
                        finally:
                            if mounted_sysroot_boot_dir:
                                umount(mounted_sysroot_boot_dir)

        if opts.result_dir != opts.tmp and result_dir:
            copytree(result_dir, opts.result_dir)
            shutil.rmtree(result_dir)

    log.info("SUMMARY")
    log.info("-------")
    log.info("Logs are in %s", os.path.abspath(os.path.dirname(opts.logfile)))
    if disk_img:
        log.info("Disk image is at %s", disk_img)
    if opts.make_appliance:
        log.info("Appliance description is in %s", opts.app_file)
    log.info("Results are in %s", opts.result_dir)

    sys.exit( 0 )

if __name__ == '__main__':
    main()