644 lines
24 KiB
Python
644 lines
24 KiB
Python
# Test class and utilities for functional tests
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#
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# Copyright (c) 2018 Red Hat, Inc.
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#
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# Author:
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# Cleber Rosa <crosa@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or
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# later. See the COPYING file in the top-level directory.
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import logging
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import os
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import shutil
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import subprocess
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import sys
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import tempfile
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import time
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import uuid
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import avocado
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from avocado.utils import cloudinit, datadrainer, process, ssh, vmimage
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from avocado.utils.path import find_command
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from qemu.machine import QEMUMachine
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from qemu.utils import (get_info_usernet_hostfwd_port, kvm_available,
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tcg_available)
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#: The QEMU build root directory. It may also be the source directory
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#: if building from the source dir, but it's safer to use BUILD_DIR for
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#: that purpose. Be aware that if this code is moved outside of a source
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#: and build tree, it will not be accurate.
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BUILD_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))
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if os.path.islink(os.path.dirname(os.path.dirname(__file__))):
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# The link to the avocado tests dir in the source code directory
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lnk = os.path.dirname(os.path.dirname(__file__))
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#: The QEMU root source directory
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SOURCE_DIR = os.path.dirname(os.path.dirname(os.readlink(lnk)))
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else:
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SOURCE_DIR = BUILD_DIR
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def has_cmd(name, args=None):
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"""
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This function is for use in a @avocado.skipUnless decorator, e.g.:
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@skipUnless(*has_cmd('sudo -n', ('sudo', '-n', 'true')))
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def test_something_that_needs_sudo(self):
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...
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"""
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if args is None:
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args = ('which', name)
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try:
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_, stderr, exitcode = run_cmd(args)
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except Exception as e:
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exitcode = -1
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stderr = str(e)
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if exitcode != 0:
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cmd_line = ' '.join(args)
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err = f'{name} required, but "{cmd_line}" failed: {stderr.strip()}'
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return (False, err)
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else:
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return (True, '')
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def has_cmds(*cmds):
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"""
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This function is for use in a @avocado.skipUnless decorator and
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allows checking for the availability of multiple commands, e.g.:
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@skipUnless(*has_cmds(('cmd1', ('cmd1', '--some-parameter')),
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'cmd2', 'cmd3'))
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def test_something_that_needs_cmd1_and_cmd2(self):
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...
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"""
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for cmd in cmds:
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if isinstance(cmd, str):
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cmd = (cmd,)
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ok, errstr = has_cmd(*cmd)
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if not ok:
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return (False, errstr)
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return (True, '')
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def run_cmd(args):
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subp = subprocess.Popen(args,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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universal_newlines=True)
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stdout, stderr = subp.communicate()
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ret = subp.returncode
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return (stdout, stderr, ret)
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def is_readable_executable_file(path):
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return os.path.isfile(path) and os.access(path, os.R_OK | os.X_OK)
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def pick_default_qemu_bin(bin_prefix='qemu-system-', arch=None):
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"""
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Picks the path of a QEMU binary, starting either in the current working
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directory or in the source tree root directory.
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:param arch: the arch to use when looking for a QEMU binary (the target
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will match the arch given). If None (the default), arch
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will be the current host system arch (as given by
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:func:`os.uname`).
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:type arch: str
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:returns: the path to the default QEMU binary or None if one could not
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be found
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:rtype: str or None
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"""
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if arch is None:
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arch = os.uname()[4]
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# qemu binary path does not match arch for powerpc, handle it
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if 'ppc64le' in arch:
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arch = 'ppc64'
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qemu_bin_relative_path = os.path.join(".", bin_prefix + arch)
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if is_readable_executable_file(qemu_bin_relative_path):
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return qemu_bin_relative_path
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qemu_bin_from_bld_dir_path = os.path.join(BUILD_DIR,
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qemu_bin_relative_path)
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if is_readable_executable_file(qemu_bin_from_bld_dir_path):
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return qemu_bin_from_bld_dir_path
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return None
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def _console_interaction(test, success_message, failure_message,
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send_string, keep_sending=False, vm=None):
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assert not keep_sending or send_string
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if vm is None:
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vm = test.vm
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console = vm.console_socket.makefile(mode='rb', encoding='utf-8')
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console_logger = logging.getLogger('console')
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while True:
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if send_string:
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vm.console_socket.sendall(send_string.encode())
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if not keep_sending:
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send_string = None # send only once
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try:
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msg = console.readline().decode().strip()
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except UnicodeDecodeError:
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msg = None
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if not msg:
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continue
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console_logger.debug(msg)
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if success_message is None or success_message in msg:
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break
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if failure_message and failure_message in msg:
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console.close()
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fail = 'Failure message found in console: "%s". Expected: "%s"' % \
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(failure_message, success_message)
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test.fail(fail)
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def interrupt_interactive_console_until_pattern(test, success_message,
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failure_message=None,
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interrupt_string='\r'):
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"""
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Keep sending a string to interrupt a console prompt, while logging the
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console output. Typical use case is to break a boot loader prompt, such:
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Press a key within 5 seconds to interrupt boot process.
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5
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4
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3
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2
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1
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Booting default image...
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:param test: an Avocado test containing a VM that will have its console
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read and probed for a success or failure message
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:type test: :class:`avocado_qemu.QemuSystemTest`
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:param success_message: if this message appears, test succeeds
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:param failure_message: if this message appears, test fails
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:param interrupt_string: a string to send to the console before trying
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to read a new line
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"""
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_console_interaction(test, success_message, failure_message,
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interrupt_string, True)
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def wait_for_console_pattern(test, success_message, failure_message=None,
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vm=None):
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"""
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Waits for messages to appear on the console, while logging the content
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:param test: an Avocado test containing a VM that will have its console
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read and probed for a success or failure message
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:type test: :class:`avocado_qemu.QemuSystemTest`
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:param success_message: if this message appears, test succeeds
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:param failure_message: if this message appears, test fails
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"""
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_console_interaction(test, success_message, failure_message, None, vm=vm)
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def exec_command(test, command):
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"""
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Send a command to a console (appending CRLF characters), while logging
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the content.
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:param test: an Avocado test containing a VM.
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:type test: :class:`avocado_qemu.QemuSystemTest`
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:param command: the command to send
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:type command: str
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"""
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_console_interaction(test, None, None, command + '\r')
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def exec_command_and_wait_for_pattern(test, command,
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success_message, failure_message=None):
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"""
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Send a command to a console (appending CRLF characters), then wait
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for success_message to appear on the console, while logging the.
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content. Mark the test as failed if failure_message is found instead.
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:param test: an Avocado test containing a VM that will have its console
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read and probed for a success or failure message
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:type test: :class:`avocado_qemu.QemuSystemTest`
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:param command: the command to send
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:param success_message: if this message appears, test succeeds
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:param failure_message: if this message appears, test fails
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"""
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_console_interaction(test, success_message, failure_message, command + '\r')
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class QemuBaseTest(avocado.Test):
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def _get_unique_tag_val(self, tag_name):
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"""
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Gets a tag value, if unique for a key
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"""
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vals = self.tags.get(tag_name, [])
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if len(vals) == 1:
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return vals.pop()
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return None
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def setUp(self, bin_prefix):
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self.arch = self.params.get('arch',
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default=self._get_unique_tag_val('arch'))
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self.cpu = self.params.get('cpu',
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default=self._get_unique_tag_val('cpu'))
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default_qemu_bin = pick_default_qemu_bin(bin_prefix, arch=self.arch)
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self.qemu_bin = self.params.get('qemu_bin',
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default=default_qemu_bin)
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if self.qemu_bin is None:
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self.cancel("No QEMU binary defined or found in the build tree")
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def fetch_asset(self, name,
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asset_hash=None, algorithm=None,
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locations=None, expire=None,
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find_only=False, cancel_on_missing=True):
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return super().fetch_asset(name,
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asset_hash=asset_hash,
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algorithm=algorithm,
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locations=locations,
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expire=expire,
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find_only=find_only,
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cancel_on_missing=cancel_on_missing)
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class QemuSystemTest(QemuBaseTest):
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"""Facilitates system emulation tests."""
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def setUp(self):
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self._vms = {}
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super().setUp('qemu-system-')
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self.machine = self.params.get('machine',
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default=self._get_unique_tag_val('machine'))
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def require_accelerator(self, accelerator):
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"""
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Requires an accelerator to be available for the test to continue
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It takes into account the currently set qemu binary.
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If the check fails, the test is canceled. If the check itself
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for the given accelerator is not available, the test is also
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canceled.
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:param accelerator: name of the accelerator, such as "kvm" or "tcg"
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:type accelerator: str
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"""
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checker = {'tcg': tcg_available,
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'kvm': kvm_available}.get(accelerator)
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if checker is None:
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self.cancel("Don't know how to check for the presence "
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"of accelerator %s" % accelerator)
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if not checker(qemu_bin=self.qemu_bin):
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self.cancel("%s accelerator does not seem to be "
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"available" % accelerator)
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def _new_vm(self, name, *args):
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self._sd = tempfile.TemporaryDirectory(prefix="avo_qemu_sock_")
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vm = QEMUMachine(self.qemu_bin, base_temp_dir=self.workdir,
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sock_dir=self._sd.name, log_dir=self.logdir)
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self.log.debug('QEMUMachine "%s" created', name)
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self.log.debug('QEMUMachine "%s" temp_dir: %s', name, vm.temp_dir)
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self.log.debug('QEMUMachine "%s" log_dir: %s', name, vm.log_dir)
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if args:
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vm.add_args(*args)
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return vm
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@property
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def vm(self):
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return self.get_vm(name='default')
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def get_vm(self, *args, name=None):
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if not name:
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name = str(uuid.uuid4())
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if self._vms.get(name) is None:
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self._vms[name] = self._new_vm(name, *args)
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if self.cpu is not None:
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self._vms[name].add_args('-cpu', self.cpu)
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if self.machine is not None:
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self._vms[name].set_machine(self.machine)
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return self._vms[name]
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def set_vm_arg(self, arg, value):
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"""
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Set an argument to list of extra arguments to be given to the QEMU
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binary. If the argument already exists then its value is replaced.
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:param arg: the QEMU argument, such as "-cpu" in "-cpu host"
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:type arg: str
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:param value: the argument value, such as "host" in "-cpu host"
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:type value: str
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"""
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if not arg or not value:
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return
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if arg not in self.vm.args:
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self.vm.args.extend([arg, value])
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else:
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idx = self.vm.args.index(arg) + 1
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if idx < len(self.vm.args):
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self.vm.args[idx] = value
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else:
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self.vm.args.append(value)
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def tearDown(self):
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for vm in self._vms.values():
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vm.shutdown()
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self._sd = None
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super().tearDown()
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class QemuUserTest(QemuBaseTest):
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"""Facilitates user-mode emulation tests."""
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def setUp(self):
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self._ldpath = []
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super().setUp('qemu-')
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def add_ldpath(self, ldpath):
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self._ldpath.append(os.path.abspath(ldpath))
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def run(self, bin_path, args=[]):
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qemu_args = " ".join(["-L %s" % ldpath for ldpath in self._ldpath])
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bin_args = " ".join(args)
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return process.run("%s %s %s %s" % (self.qemu_bin, qemu_args,
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bin_path, bin_args))
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class LinuxSSHMixIn:
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"""Contains utility methods for interacting with a guest via SSH."""
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def ssh_connect(self, username, credential, credential_is_key=True):
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self.ssh_logger = logging.getLogger('ssh')
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res = self.vm.command('human-monitor-command',
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command_line='info usernet')
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port = get_info_usernet_hostfwd_port(res)
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self.assertIsNotNone(port)
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self.assertGreater(port, 0)
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self.log.debug('sshd listening on port: %d', port)
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if credential_is_key:
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self.ssh_session = ssh.Session('127.0.0.1', port=port,
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user=username, key=credential)
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else:
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self.ssh_session = ssh.Session('127.0.0.1', port=port,
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user=username, password=credential)
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for i in range(10):
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try:
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self.ssh_session.connect()
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return
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except:
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time.sleep(i)
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self.fail('ssh connection timeout')
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def ssh_command(self, command):
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self.ssh_logger.info(command)
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result = self.ssh_session.cmd(command)
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stdout_lines = [line.rstrip() for line
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in result.stdout_text.splitlines()]
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for line in stdout_lines:
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self.ssh_logger.info(line)
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stderr_lines = [line.rstrip() for line
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in result.stderr_text.splitlines()]
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for line in stderr_lines:
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self.ssh_logger.warning(line)
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self.assertEqual(result.exit_status, 0,
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f'Guest command failed: {command}')
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return stdout_lines, stderr_lines
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class LinuxDistro:
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"""Represents a Linux distribution
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Holds information of known distros.
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"""
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#: A collection of known distros and their respective image checksum
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KNOWN_DISTROS = {
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'fedora': {
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'31': {
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'x86_64':
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{'checksum': ('e3c1b309d9203604922d6e255c2c5d09'
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'8a309c2d46215d8fc026954f3c5c27a0'),
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'pxeboot_url': ('https://archives.fedoraproject.org/'
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'pub/archive/fedora/linux/releases/31/'
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'Everything/x86_64/os/images/pxeboot/'),
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'kernel_params': ('root=UUID=b1438b9b-2cab-4065-a99a-'
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'08a96687f73c ro no_timer_check '
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'net.ifnames=0 console=tty1 '
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'console=ttyS0,115200n8'),
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},
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'aarch64':
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{'checksum': ('1e18d9c0cf734940c4b5d5ec592facae'
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'd2af0ad0329383d5639c997fdf16fe49'),
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'pxeboot_url': 'https://archives.fedoraproject.org/'
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'pub/archive/fedora/linux/releases/31/'
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'Everything/aarch64/os/images/pxeboot/',
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'kernel_params': ('root=UUID=b6950a44-9f3c-4076-a9c2-'
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'355e8475b0a7 ro earlyprintk=pl011,0x9000000'
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' ignore_loglevel no_timer_check'
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' printk.time=1 rd_NO_PLYMOUTH'
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' console=ttyAMA0'),
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},
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'ppc64':
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{'checksum': ('7c3528b85a3df4b2306e892199a9e1e4'
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'3f991c506f2cc390dc4efa2026ad2f58')},
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's390x':
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{'checksum': ('4caaab5a434fd4d1079149a072fdc789'
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'1e354f834d355069ca982fdcaf5a122d')},
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},
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'32': {
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'aarch64':
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{'checksum': ('b367755c664a2d7a26955bbfff985855'
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'adfa2ca15e908baf15b4b176d68d3967'),
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'pxeboot_url': ('http://dl.fedoraproject.org/pub/fedora/linux/'
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'releases/32/Server/aarch64/os/images/'
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'pxeboot/'),
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'kernel_params': ('root=UUID=3df75b65-be8d-4db4-8655-'
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'14d95c0e90c5 ro no_timer_check net.ifnames=0'
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' console=tty1 console=ttyS0,115200n8'),
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},
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},
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'33': {
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'aarch64':
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{'checksum': ('e7f75cdfd523fe5ac2ca9eeece68edc1'
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'a81f386a17f969c1d1c7c87031008a6b'),
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'pxeboot_url': ('http://dl.fedoraproject.org/pub/fedora/linux/'
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'releases/33/Server/aarch64/os/images/'
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'pxeboot/'),
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'kernel_params': ('root=UUID=d20b3ffa-6397-4a63-a734-'
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'1126a0208f8a ro no_timer_check net.ifnames=0'
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' console=tty1 console=ttyS0,115200n8'
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' console=tty0'),
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},
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},
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}
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}
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def __init__(self, name, version, arch):
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self.name = name
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self.version = version
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self.arch = arch
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try:
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info = self.KNOWN_DISTROS.get(name).get(version).get(arch)
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except AttributeError:
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# Unknown distro
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info = None
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self._info = info or {}
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@property
|
|
def checksum(self):
|
|
"""Gets the cloud-image file checksum"""
|
|
return self._info.get('checksum', None)
|
|
|
|
@checksum.setter
|
|
def checksum(self, value):
|
|
self._info['checksum'] = value
|
|
|
|
@property
|
|
def pxeboot_url(self):
|
|
"""Gets the repository url where pxeboot files can be found"""
|
|
return self._info.get('pxeboot_url', None)
|
|
|
|
@property
|
|
def default_kernel_params(self):
|
|
"""Gets the default kernel parameters"""
|
|
return self._info.get('kernel_params', None)
|
|
|
|
|
|
class LinuxTest(LinuxSSHMixIn, QemuSystemTest):
|
|
"""Facilitates having a cloud-image Linux based available.
|
|
|
|
For tests that indent to interact with guests, this is a better choice
|
|
to start with than the more vanilla `QemuSystemTest` class.
|
|
"""
|
|
|
|
timeout = 900
|
|
distro = None
|
|
username = 'root'
|
|
password = 'password'
|
|
smp = '2'
|
|
memory = '1024'
|
|
|
|
def _set_distro(self):
|
|
distro_name = self.params.get(
|
|
'distro',
|
|
default=self._get_unique_tag_val('distro'))
|
|
if not distro_name:
|
|
distro_name = 'fedora'
|
|
|
|
distro_version = self.params.get(
|
|
'distro_version',
|
|
default=self._get_unique_tag_val('distro_version'))
|
|
if not distro_version:
|
|
distro_version = '31'
|
|
|
|
self.distro = LinuxDistro(distro_name, distro_version, self.arch)
|
|
|
|
# The distro checksum behaves differently than distro name and
|
|
# version. First, it does not respect a tag with the same
|
|
# name, given that it's not expected to be used for filtering
|
|
# (distro name versions are the natural choice). Second, the
|
|
# order of precedence is: parameter, attribute and then value
|
|
# from KNOWN_DISTROS.
|
|
distro_checksum = self.params.get('distro_checksum',
|
|
default=None)
|
|
if distro_checksum:
|
|
self.distro.checksum = distro_checksum
|
|
|
|
def setUp(self, ssh_pubkey=None, network_device_type='virtio-net'):
|
|
super().setUp()
|
|
self._set_distro()
|
|
self.vm.add_args('-smp', self.smp)
|
|
self.vm.add_args('-m', self.memory)
|
|
# The following network device allows for SSH connections
|
|
self.vm.add_args('-netdev', 'user,id=vnet,hostfwd=:127.0.0.1:0-:22',
|
|
'-device', '%s,netdev=vnet' % network_device_type)
|
|
self.set_up_boot()
|
|
if ssh_pubkey is None:
|
|
ssh_pubkey, self.ssh_key = self.set_up_existing_ssh_keys()
|
|
self.set_up_cloudinit(ssh_pubkey)
|
|
|
|
def set_up_existing_ssh_keys(self):
|
|
ssh_public_key = os.path.join(SOURCE_DIR, 'tests', 'keys', 'id_rsa.pub')
|
|
source_private_key = os.path.join(SOURCE_DIR, 'tests', 'keys', 'id_rsa')
|
|
ssh_dir = os.path.join(self.workdir, '.ssh')
|
|
os.mkdir(ssh_dir, mode=0o700)
|
|
ssh_private_key = os.path.join(ssh_dir,
|
|
os.path.basename(source_private_key))
|
|
shutil.copyfile(source_private_key, ssh_private_key)
|
|
os.chmod(ssh_private_key, 0o600)
|
|
return (ssh_public_key, ssh_private_key)
|
|
|
|
def download_boot(self):
|
|
self.log.debug('Looking for and selecting a qemu-img binary to be '
|
|
'used to create the bootable snapshot image')
|
|
# If qemu-img has been built, use it, otherwise the system wide one
|
|
# will be used. If none is available, the test will cancel.
|
|
qemu_img = os.path.join(BUILD_DIR, 'qemu-img')
|
|
if not os.path.exists(qemu_img):
|
|
qemu_img = find_command('qemu-img', False)
|
|
if qemu_img is False:
|
|
self.cancel('Could not find "qemu-img", which is required to '
|
|
'create the bootable image')
|
|
vmimage.QEMU_IMG = qemu_img
|
|
|
|
self.log.info('Downloading/preparing boot image')
|
|
# Fedora 31 only provides ppc64le images
|
|
image_arch = self.arch
|
|
if self.distro.name == 'fedora':
|
|
if image_arch == 'ppc64':
|
|
image_arch = 'ppc64le'
|
|
|
|
try:
|
|
boot = vmimage.get(
|
|
self.distro.name, arch=image_arch, version=self.distro.version,
|
|
checksum=self.distro.checksum,
|
|
algorithm='sha256',
|
|
cache_dir=self.cache_dirs[0],
|
|
snapshot_dir=self.workdir)
|
|
except:
|
|
self.cancel('Failed to download/prepare boot image')
|
|
return boot.path
|
|
|
|
def prepare_cloudinit(self, ssh_pubkey=None):
|
|
self.log.info('Preparing cloudinit image')
|
|
try:
|
|
cloudinit_iso = os.path.join(self.workdir, 'cloudinit.iso')
|
|
pubkey_content = None
|
|
if ssh_pubkey:
|
|
with open(ssh_pubkey) as pubkey:
|
|
pubkey_content = pubkey.read()
|
|
cloudinit.iso(cloudinit_iso, self.name,
|
|
username=self.username,
|
|
password=self.password,
|
|
# QEMU's hard coded usermode router address
|
|
phone_home_host='10.0.2.2',
|
|
phone_home_port=self.phone_server.server_port,
|
|
authorized_key=pubkey_content)
|
|
except Exception:
|
|
self.cancel('Failed to prepare the cloudinit image')
|
|
return cloudinit_iso
|
|
|
|
def set_up_boot(self):
|
|
path = self.download_boot()
|
|
self.vm.add_args('-drive', 'file=%s' % path)
|
|
|
|
def set_up_cloudinit(self, ssh_pubkey=None):
|
|
self.phone_server = cloudinit.PhoneHomeServer(('0.0.0.0', 0),
|
|
self.name)
|
|
cloudinit_iso = self.prepare_cloudinit(ssh_pubkey)
|
|
self.vm.add_args('-drive', 'file=%s,format=raw' % cloudinit_iso)
|
|
|
|
def launch_and_wait(self, set_up_ssh_connection=True):
|
|
self.vm.set_console()
|
|
self.vm.launch()
|
|
console_drainer = datadrainer.LineLogger(self.vm.console_socket.fileno(),
|
|
logger=self.log.getChild('console'))
|
|
console_drainer.start()
|
|
self.log.info('VM launched, waiting for boot confirmation from guest')
|
|
while not self.phone_server.instance_phoned_back:
|
|
self.phone_server.handle_request()
|
|
|
|
if set_up_ssh_connection:
|
|
self.log.info('Setting up the SSH connection')
|
|
self.ssh_connect(self.username, self.ssh_key)
|