Example #1
0
def maybe_install_squashfuse(cloud):
    """Install squashfuse if we are in a container."""
    if not util.is_container():
        return
    try:
        cloud.distro.update_package_sources()
    except Exception:
        util.logexc(LOG, "Package update failed")
        raise
    try:
        cloud.distro.install_packages(['squashfuse'])
    except Exception:
        util.logexc(LOG, "Failed to install squashfuse")
        raise
Example #2
0
def devent2dev(devent):
    if devent.startswith("/dev/"):
        return devent
    else:
        result = util.get_mount_info(devent)
        if not result:
            raise ValueError("Could not determine device of '%s' % dev_ent")
        dev = result[0]

    container = util.is_container()

    # Ensure the path is a block device.
    if (dev == "/dev/root" and not container):
        dev = util.rootdev_from_cmdline(util.get_cmdline())
        if dev is None:
            if os.path.exists(dev):
                # if /dev/root exists, but we failed to convert
                # that to a "real" /dev/ path device, then return it.
                return dev
            raise ValueError("Unable to find device '/dev/root'")
    return dev
Example #3
0
def handle(name, cfg, _cloud, log, args):
    if len(args) != 0:
        resize_root = args[0]
    else:
        resize_root = util.get_cfg_option_str(cfg, "resize_rootfs", True)

    if not util.translate_bool(resize_root, addons=[NOBLOCK]):
        log.debug("Skipping module named %s, resizing disabled", name)
        return

    # TODO(harlowja) is the directory ok to be used??
    resize_root_d = util.get_cfg_option_str(cfg, "resize_rootfs_tmp", "/run")
    util.ensure_dir(resize_root_d)

    # TODO(harlowja): allow what is to be resized to be configurable??
    resize_what = "/"
    result = util.get_mount_info(resize_what, log)
    if not result:
        log.warn("Could not determine filesystem type of %s", resize_what)
        return

    (devpth, fs_type, mount_point) = result

    # Ensure the path is a block device.
    info = "dev=%s mnt_point=%s path=%s" % (devpth, mount_point, resize_what)
    log.debug("resize_info: %s" % info)

    container = util.is_container()

    if (devpth == "/dev/root" and not os.path.exists(devpth) and
        not container):
        devpth = rootdev_from_cmdline(util.get_cmdline())
        if devpth is None:
            log.warn("Unable to find device '/dev/root'")
            return
        log.debug("Converted /dev/root to '%s' per kernel cmdline", devpth)

    try:
        statret = os.stat(devpth)
    except OSError as exc:
        if container and exc.errno == errno.ENOENT:
            log.debug("Device '%s' did not exist in container. "
                      "cannot resize: %s" % (devpth, info))
        elif exc.errno == errno.ENOENT:
            log.warn("Device '%s' did not exist. cannot resize: %s" %
                     (devpth, info))
        else:
            raise exc
        return

    if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
        if container:
            log.debug("device '%s' not a block device in container."
                      " cannot resize: %s" % (devpth, info))
        else:
            log.warn("device '%s' not a block device. cannot resize: %s" %
                     (devpth, info))
        return

    resizer = None
    fstype_lc = fs_type.lower()
    for (pfix, root_cmd) in RESIZE_FS_PREFIXES_CMDS:
        if fstype_lc.startswith(pfix):
            resizer = root_cmd
            break

    if not resizer:
        log.warn("Not resizing unknown filesystem type %s for %s",
                 fs_type, resize_what)
        return

    resize_cmd = resizer(resize_what, devpth)
    log.debug("Resizing %s (%s) using %s", resize_what, fs_type,
              ' '.join(resize_cmd))

    if resize_root == NOBLOCK:
        # Fork to a child that will run
        # the resize command
        util.fork_cb(
            util.log_time(logfunc=log.debug, msg="backgrounded Resizing",
                func=do_resize, args=(resize_cmd, log)))
    else:
        util.log_time(logfunc=log.debug, msg="Resizing",
            func=do_resize, args=(resize_cmd, log))

    action = 'Resized'
    if resize_root == NOBLOCK:
        action = 'Resizing (via forking)'
    log.debug("%s root filesystem (type=%s, val=%s)", action, fs_type,
              resize_root)
Example #4
0
def maybe_get_writable_device_path(devpath, info, log):
    """Return updated devpath if the devpath is a writable block device.

    @param devpath: Requested path to the root device we want to resize.
    @param info: String representing information about the requested device.
    @param log: Logger to which logs will be added upon error.

    @returns devpath or updated devpath per kernel commandline if the device
        path is a writable block device, returns None otherwise.
    """
    container = util.is_container()

    # Ensure the path is a block device.
    if (devpath == "/dev/root" and not os.path.exists(devpath) and
            not container):
        devpath = util.rootdev_from_cmdline(util.get_cmdline())
        if devpath is None:
            log.warn("Unable to find device '/dev/root'")
            return None
        log.debug("Converted /dev/root to '%s' per kernel cmdline", devpath)

    if devpath == 'overlayroot':
        log.debug("Not attempting to resize devpath '%s': %s", devpath, info)
        return None

    # FreeBSD zpool can also just use gpt/<label>
    # with that in mind we can not do an os.stat on "gpt/whatever"
    # therefore return the devpath already here.
    if devpath.startswith('gpt/'):
        log.debug('We have a gpt label - just go ahead')
        return devpath
    # Alternatively, our device could simply be a name as returned by gpart,
    # such as da0p3
    if not devpath.startswith('/dev/') and not os.path.exists(devpath):
        fulldevpath = '/dev/' + devpath.lstrip('/')
        log.debug("'%s' doesn't appear to be a valid device path. Trying '%s'",
                  devpath, fulldevpath)
        devpath = fulldevpath

    try:
        statret = os.stat(devpath)
    except OSError as exc:
        if container and exc.errno == errno.ENOENT:
            log.debug("Device '%s' did not exist in container. "
                      "cannot resize: %s", devpath, info)
        elif exc.errno == errno.ENOENT:
            log.warn("Device '%s' did not exist. cannot resize: %s",
                     devpath, info)
        else:
            raise exc
        return None

    if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
        if container:
            log.debug("device '%s' not a block device in container."
                      " cannot resize: %s" % (devpath, info))
        else:
            log.warn("device '%s' not a block device. cannot resize: %s" %
                     (devpath, info))
        return None
    return devpath  # The writable block devpath
def handle(_name, cfg, _cloud, log, args):
    if len(args) != 0:
        resize_root = False
        if str(args[0]).lower() in ['true', '1', 'on', 'yes']:
            resize_root = True
    else:
        resize_root = util.get_cfg_option_str(cfg, "resize_rootfs", True)

    if str(resize_root).lower() in ['false', '0']:
        return

    # we use mktemp rather than mkstemp because early in boot nothing
    # else should be able to race us for this, and we need to mknod.
    devpth = tempfile.mktemp(prefix="cloudinit.resizefs.", dir="/run")

    try:
        st_dev = os.stat("/").st_dev
        dev = os.makedev(os.major(st_dev), os.minor(st_dev))
        os.mknod(devpth, 0400 | stat.S_IFBLK, dev)
    except:
        if util.is_container():
            log.debug("inside container, ignoring mknod failure in resizefs")
            return
        log.warn("Failed to make device node to resize /")
        raise

    cmd = ['blkid', '-c', '/dev/null', '-sTYPE', '-ovalue', devpth]
    try:
        (fstype, _err) = util.subp(cmd)
    except subprocess.CalledProcessError as e:
        log.warn("Failed to get filesystem type of maj=%s, min=%s via: %s" %
            (os.major(st_dev), os.minor(st_dev), cmd))
        log.warn("output=%s\nerror=%s\n", e.output[0], e.output[1])
        os.unlink(devpth)
        raise

    if str(fstype).startswith("ext"):
        resize_cmd = ['resize2fs', devpth]
    elif fstype == "xfs":
        resize_cmd = ['xfs_growfs', devpth]
    else:
        os.unlink(devpth)
        log.debug("not resizing unknown filesystem %s" % fstype)
        return

    if resize_root == "noblock":
        fid = os.fork()
        if fid == 0:
            try:
                do_resize(resize_cmd, devpth, log)
                os._exit(0)  # pylint: disable=W0212
            except Exception as exc:
                sys.stderr.write("Failed: %s" % exc)
                os._exit(1)  # pylint: disable=W0212
    else:
        do_resize(resize_cmd, devpth, log)

    log.debug("resizing root filesystem (type=%s, maj=%i, min=%i, val=%s)" %
        (str(fstype).rstrip("\n"), os.major(st_dev), os.minor(st_dev),
         resize_root))

    return