218 lines
10 KiB
Diff
218 lines
10 KiB
Diff
From a07674254acb562332579a42a25c44c1a0e0bac6 Mon Sep 17 00:00:00 2001
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From: Ondrej Nosek <onosek@redhat.com>
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Date: Thu, 21 Dec 2017 03:18:00 +0100
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Subject: [PATCH 1/2] Fall back to mount if guestmount is not available
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Relates: https://pagure.io/pungi/issue/803
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Signed-off-by: Ondrej Nosek <onosek@redhat.com>
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---
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pungi.spec | 1 -
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pungi/phases/product_img.py | 9 +++++++--
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pungi/util.py | 6 +-----
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pungi/wrappers/iso.py | 19 ++++++++++++++-----
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tests/test_iso_wrapper.py | 37 +++++++++++++++++++++++++++++++------
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tests/test_util.py | 2 +-
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6 files changed, 54 insertions(+), 20 deletions(-)
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diff --git a/pungi.spec b/pungi.spec
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index 545e409..82d305f 100644
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--- a/pungi.spec
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+++ b/pungi.spec
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@@ -42,7 +42,6 @@ Requires: gettext
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Requires: syslinux
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Requires: git
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Requires: python-jsonschema
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-Requires: libguestfs-tools-c
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Requires: python-enum34
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Requires: python2-dnf
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Requires: python2-multilib
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diff --git a/pungi/phases/product_img.py b/pungi/phases/product_img.py
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index 9a21eed..c956674 100644
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--- a/pungi/phases/product_img.py
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+++ b/pungi/phases/product_img.py
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@@ -131,6 +131,9 @@ def create_product_img(compose, arch, variant):
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shutil.rmtree(po_tmp)
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+ ret, __ = run(["which", "guestmount"], can_fail=True)
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+ guestmount_available = not bool(ret) # return code 0 means that guestmount is available
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+
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mount_tmp = compose.mkdtemp(prefix="product_img_mount_")
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cmds = [
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# allocate image
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@@ -139,7 +142,8 @@ def create_product_img(compose, arch, variant):
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"mke2fs -F %s" % shlex_quote(image),
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# use guestmount to mount the image, which doesn't require root privileges
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# LIBGUESTFS_BACKEND=direct: running qemu directly without libvirt
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- "LIBGUESTFS_BACKEND=direct guestmount -a %s -m /dev/sda %s" % (shlex_quote(image), shlex_quote(mount_tmp)),
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+ "LIBGUESTFS_BACKEND=direct guestmount -a %s -m /dev/sda %s" % (shlex_quote(image), shlex_quote(mount_tmp)) if guestmount_available
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+ else "mount -o loop %s %s" % (shlex_quote(image), shlex_quote(mount_tmp)),
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"mkdir -p %s/run/install/product" % shlex_quote(mount_tmp),
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"cp -rp %s/* %s/run/install/product/" % (shlex_quote(product_tmp), shlex_quote(mount_tmp)),
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"mkdir -p %s/run/install/product/pyanaconda" % shlex_quote(mount_tmp),
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@@ -149,7 +153,8 @@ def create_product_img(compose, arch, variant):
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"ln -s run/install/product/locale %s" % shlex_quote(mount_tmp),
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# compat symlink: run/install/product/pyanaconda/installclasses -> ../installclasses
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"ln -s ../installclasses %s/run/install/product/pyanaconda/installclasses" % shlex_quote(mount_tmp),
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- "fusermount -u %s" % shlex_quote(mount_tmp),
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+ "fusermount -u %s" % shlex_quote(mount_tmp) if guestmount_available
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+ else "umount %s" % shlex_quote(mount_tmp),
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# tweak last mount path written in the image
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"tune2fs -M /run/install/product %s" % shlex_quote(image),
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]
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diff --git a/pungi/util.py b/pungi/util.py
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index 2d2df82..b74f280 100644
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--- a/pungi/util.py
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+++ b/pungi/util.py
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@@ -36,6 +36,7 @@ from productmd.common import get_major_version
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# Patterns that match all names of debuginfo packages
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DEBUG_PATTERNS = ["*-debuginfo", "*-debuginfo-*", "*-debugsource"]
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+
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def _doRunCommand(command, logger, rundir='/tmp', output=subprocess.PIPE, error=subprocess.PIPE, env=None):
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"""Run a command and log the output. Error out if we get something on stderr"""
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@@ -609,11 +610,6 @@ def temp_dir(log=None, *args, **kwargs):
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log.warning('Error removing %s: %s', dir, exc.strerror)
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-def fusermount(path, **kwargs):
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- """Run fusermount -u on a given path."""
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- run_unmount_cmd(['fusermount', '-u', path], path=path, **kwargs)
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-
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-
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def run_unmount_cmd(cmd, max_retries=10, path=None, logger=None):
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"""Attempt to run the command to unmount an image.
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diff --git a/pungi/wrappers/iso.py b/pungi/wrappers/iso.py
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index 7e2c710..9ed3f24 100644
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--- a/pungi/wrappers/iso.py
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+++ b/pungi/wrappers/iso.py
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@@ -385,11 +385,17 @@ def mount(image, logger=None):
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The yielded path will only be valid in the with block and is removed once
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the image is unmounted.
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"""
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- # use guestmount to mount the image, which doesn't require root privileges
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- # LIBGUESTFS_BACKEND=direct: running qemu directly without libvirt
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with util.temp_dir(prefix='iso-mount-') as mount_dir:
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- env = {'LIBGUESTFS_BACKEND': 'direct', 'LIBGUESTFS_DEBUG': '1', 'LIBGUESTFS_TRACE': '1'}
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- cmd = ["guestmount", "-a", image, "-m", "/dev/sda", mount_dir]
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+ ret, __ = run(["which", "guestmount"], can_fail=True)
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+ guestmount_available = not bool(ret) # return code 0 means that guestmount is available
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+ if guestmount_available:
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+ # use guestmount to mount the image, which doesn't require root privileges
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+ # LIBGUESTFS_BACKEND=direct: running qemu directly without libvirt
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+ env = {'LIBGUESTFS_BACKEND': 'direct', 'LIBGUESTFS_DEBUG': '1', 'LIBGUESTFS_TRACE': '1'}
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+ cmd = ["guestmount", "-a", image, "-m", "/dev/sda", mount_dir]
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+ else:
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+ env = {}
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+ cmd = ["mount", "-o", "loop", image, mount_dir]
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ret, out = run(cmd, env=env, can_fail=True, universal_newlines=True)
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if ret != 0:
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# The mount command failed, something is wrong. Log the output and raise an exception.
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@@ -400,4 +406,7 @@ def mount(image, logger=None):
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try:
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yield mount_dir
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finally:
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- util.fusermount(mount_dir, logger=logger)
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+ if guestmount_available:
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+ util.run_unmount_cmd(['fusermount', '-u', mount_dir], path=mount_dir)
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+ else:
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+ util.run_unmount_cmd(['umount', mount_dir], path=mount_dir)
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diff --git a/tests/test_iso_wrapper.py b/tests/test_iso_wrapper.py
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index a4a00a1..7ebc2c3 100644
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--- a/tests/test_iso_wrapper.py
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+++ b/tests/test_iso_wrapper.py
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@@ -20,6 +20,7 @@ INCORRECT_OUTPUT = '''This should never happen: File not found'''
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class TestIsoUtils(unittest.TestCase):
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+
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@mock.patch('pungi.wrappers.iso.run')
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def test_get_implanted_md5_correct(self, mock_run):
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mock_run.return_value = (0, CORRECT_OUTPUT)
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@@ -44,24 +45,48 @@ class TestIsoUtils(unittest.TestCase):
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@mock.patch('pungi.util.run_unmount_cmd')
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@mock.patch('pungi.wrappers.iso.run')
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def test_mount_iso(self, mock_run, mock_unmount):
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- mock_run.return_value = (0, '')
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+ # first tuple is return value for command 'which guestmount'
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+ # value determines type of the mount/unmount command ('1' - guestmount is not available)
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+ # for approach as a root, pair commands mount-umount are used
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+ mock_run.side_effect = [(1, ''), (0, '')]
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+ with iso.mount('dummy') as temp_dir:
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+ self.assertTrue(os.path.isdir(temp_dir))
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+ self.assertEqual(len(mock_run.call_args_list), 2)
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+ mount_call_str = str(mock_run.call_args_list[1])
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+ self.assertTrue(mount_call_str.startswith("call(['mount'"))
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+ self.assertEqual(len(mock_unmount.call_args_list), 1)
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+ unmount_call_str = str(mock_unmount.call_args_list[0])
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+ self.assertTrue(unmount_call_str.startswith("call(['umount'"))
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+ self.assertFalse(os.path.isdir(temp_dir))
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+
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+ @mock.patch('pungi.util.run_unmount_cmd')
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+ @mock.patch('pungi.wrappers.iso.run')
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+ def test_guestmount(self, mock_run, mock_unmount):
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+ # first tuple is return value for command 'which guestmount'
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+ # value determines type of the mount/unmount command ('0' - guestmount is available)
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+ # for approach as a non-root, pair commands guestmount-fusermount are used
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+ mock_run.side_effect = [(0, ''), (0, '')]
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with iso.mount('dummy') as temp_dir:
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self.assertTrue(os.path.isdir(temp_dir))
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- self.assertEqual(len(mock_run.call_args_list), 1)
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+ self.assertEqual(len(mock_run.call_args_list), 2)
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+ mount_call_str = str(mock_run.call_args_list[1])
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+ self.assertTrue(mount_call_str.startswith("call(['guestmount'"))
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self.assertEqual(len(mock_unmount.call_args_list), 1)
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+ unmount_call_str = str(mock_unmount.call_args_list[0])
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+ self.assertTrue(unmount_call_str.startswith("call(['fusermount'"))
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self.assertFalse(os.path.isdir(temp_dir))
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@mock.patch('pungi.util.run_unmount_cmd')
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@mock.patch('pungi.wrappers.iso.run')
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def test_mount_iso_always_unmounts(self, mock_run, mock_unmount):
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- mock_run.return_value = (0, '')
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+ mock_run.side_effect = [(1, ''), (0, '')]
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try:
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with iso.mount('dummy') as temp_dir:
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self.assertTrue(os.path.isdir(temp_dir))
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raise RuntimeError()
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except RuntimeError:
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pass
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- self.assertEqual(len(mock_run.call_args_list), 1)
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+ self.assertEqual(len(mock_run.call_args_list), 2)
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self.assertEqual(len(mock_unmount.call_args_list), 1)
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self.assertFalse(os.path.isdir(temp_dir))
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@@ -69,11 +94,11 @@ class TestIsoUtils(unittest.TestCase):
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@mock.patch('pungi.wrappers.iso.run')
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def test_mount_iso_raises_on_error(self, mock_run, mock_unmount):
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log = mock.Mock()
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- mock_run.return_value = (1, 'Boom')
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+ mock_run.side_effect = [(1, ''), (1, 'Boom')]
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with self.assertRaises(RuntimeError):
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with iso.mount('dummy', logger=log) as temp_dir:
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self.assertTrue(os.path.isdir(temp_dir))
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- self.assertEqual(len(mock_run.call_args_list), 1)
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+ self.assertEqual(len(mock_run.call_args_list), 2)
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self.assertEqual(len(mock_unmount.call_args_list), 0)
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self.assertEqual(len(log.mock_calls), 1)
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diff --git a/tests/test_util.py b/tests/test_util.py
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index e0dd2b1..7529a25 100644
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--- a/tests/test_util.py
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+++ b/tests/test_util.py
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@@ -446,7 +446,7 @@ class TestUnmountCmd(unittest.TestCase):
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self._fakeProc(0, out='It is very busy'),
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self._fakeProc(1, out='lsof output')]
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with self.assertRaises(RuntimeError) as ctx:
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- util.fusermount('/path', max_retries=3, logger=logger)
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+ util.run_unmount_cmd(['fusermount', '-u', '/path'], path='/path', max_retries=3, logger=logger)
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cmd = ['fusermount', '-u', '/path']
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expected = [mock.call(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE,
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universal_newlines=True),
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--
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2.13.6
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