Re: [PATCH 9/9] tests/acceptance: Linux boot test for record/replay

[Willian Rampazzo]

On Mon, May 25, 2020 at 8:30 AM Pavel Dovgalyuk
<address@hidden> wrote:
>
> This patch adds a test for record/replay, which boots Linux
> image from the disk and interacts with the network.
> The idea and code of this test is borrowed from boot_linux.py
> However, currently record/replay works only for x86_64,
> therefore other tests were excluded.
>
> Each test consists of the following phases:
>  - downloading the disk image
>  - recording the execution
>  - replaying the execution
>
> Replay does not validates the output, but waits until QEMU
> finishes the execution. This is reasonable, because
> QEMU usually hangs when replay goes wrong.
>
> Signed-off-by: Pavel Dovgalyuk <address@hidden>
> ---
>  MAINTAINERS                      |    1
>  tests/acceptance/replay_linux.py |  140 
> ++++++++++++++++++++++++++++++++++++++
>  2 files changed, 141 insertions(+)
>  create mode 100644 tests/acceptance/replay_linux.py
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index e9a9ce4f66..97f066a9b2 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2498,6 +2498,7 @@ F: include/sysemu/replay.h
>  F: docs/replay.txt
>  F: stubs/replay.c
>  F: tests/acceptance/replay_kernel.py
> +F: tests/acceptance/replay_linux.py
>
>  IOVA Tree
>  M: Peter Xu <address@hidden>
> diff --git a/tests/acceptance/replay_linux.py 
> b/tests/acceptance/replay_linux.py
> new file mode 100644
> index 0000000000..08eedb23ef
> --- /dev/null
> +++ b/tests/acceptance/replay_linux.py
> @@ -0,0 +1,140 @@
> +# Record/replay test that boots a complete Linux system via a cloud image
> +#
> +# Copyright (c) 2020 ISP RAS
> +#
> +# Author:
> +#  Pavel Dovgalyuk <address@hidden>
> +#
> +# This work is licensed under the terms of the GNU GPL, version 2 or
> +# later.  See the COPYING file in the top-level directory.
> +
> +import os
> +
> +from avocado_qemu import Test, BUILD_DIR
> +
> +from avocado.utils import cloudinit
> +from avocado.utils import network
> +from avocado.utils import vmimage
> +from avocado.utils import datadrainer
> +from avocado.utils.path import find_command
> +
> +class ReplayLinux(Test):

There is no need to copy/paste the whole BootLinux class. You can
inherit from it and re-implement the lauch_and_wait method. Inheriting
avoids duplication of code.

> +    """
> +    Boots a Linux system, checking for a successful initialization
> +    """
> +
> +    timeout = 1800
> +    chksum = None
> +    hdd = 'ide-hd'
> +    cd = 'ide-cd'
> +    bus = ''
> +
> +    def setUp(self):
> +        super(ReplayLinux, self).setUp()
> +        self.prepare_boot()
> +        self.prepare_cloudinit()
> +
> +    def vm_add_disk(self, vm, path, id, device):
> +        bus_string = ''
> +        if self.bus != '':
> +            bus_string = ',bus=%s.%d' % (self.bus, id,)
> +        vm.add_args('-drive', 'file=%s,snapshot,id=disk%s,if=none' % (path, 
> id))
> +        vm.add_args('-drive', 
> 'driver=blkreplay,id=disk%s-rr,if=none,image=disk%s' % (id, id))
> +        vm.add_args('-device', '%s,drive=disk%s-rr%s' % (device, id, 
> bus_string))
> +
> +    def prepare_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 image_arch == 'ppc64':
> +            image_arch = 'ppc64le'
> +        try:
> +            self.boot = vmimage.get(
> +                'fedora', arch=image_arch, version='31',
> +                checksum=self.chksum,
> +                algorithm='sha256',
> +                cache_dir=self.cache_dirs[0],
> +                snapshot_dir=self.workdir)
> +        except:
> +            self.cancel('Failed to download/prepare boot image')
> +
> +    def prepare_cloudinit(self):
> +        self.log.info('Preparing cloudinit image')
> +        try:
> +            self.cloudinit_iso = os.path.join(self.workdir, 'cloudinit.iso')
> +            self.phone_home_port = network.find_free_port()
> +            cloudinit.iso(self.cloudinit_iso, self.name,
> +                          username='root',
> +                          password='password',
> +                          # QEMU's hard coded usermode router address
> +                          phone_home_host='10.0.2.2',
> +                          phone_home_port=self.phone_home_port)
> +        except Exception:
> +            self.cancel('Failed to prepared cloudinit image')
> +
> +    def launch_and_wait(self, record, args, shift):
> +        vm = self.get_vm()
> +        vm.add_args('-smp', '1')
> +        vm.add_args('-m', '1024')
> +        vm.add_args('-object', 'filter-replay,id=replay,netdev=hub0port0')
> +        vm.add_args(*args)
> +        self.vm_add_disk(vm, self.boot.path, 0, self.hdd)
> +        self.vm_add_disk(vm, self.cloudinit_iso, 1, self.cd)
> +        if record:
> +            mode = 'record'
> +        else:
> +            mode = 'replay'
> +        vm.add_args('-icount', 'shift=%s,rr=%s,rrfile=%s' %
> +                    (shift, mode, os.path.join(self.workdir, 'replay.bin')))
> +
> +        vm.set_console()
> +        vm.launch()
> +        console_drainer = datadrainer.LineLogger(vm.console_socket.fileno(),
> +                                                 
> logger=self.log.getChild('console'),
> +                                                 stop_check=(lambda : not 
> vm.is_running()))
> +        console_drainer.start()
> +        if record:
> +            self.log.info('VM launched, waiting for boot confirmation from 
> guest')
> +            cloudinit.wait_for_phone_home(('0.0.0.0', self.phone_home_port), 
> self.name)
> +            vm.shutdown()
> +        else:
> +            self.log.info('VM launched, waiting the recorded execution to be 
> replayed')
> +            vm.wait()
> +
> +    def run_rr(self, args=(), shift=7):
> +        self.launch_and_wait(True, args, shift)
> +        self.launch_and_wait(False, args, shift)
> +
> +class ReplayLinuxX8664(ReplayLinux):
> +    """
> +    :avocado: tags=arch:x86_64
> +    """
> +    bus = 'ide'
> +
> +    chksum = 
> 'e3c1b309d9203604922d6e255c2c5d098a309c2d46215d8fc026954f3c5c27a0'
> +
> +    def test_pc_i440fx(self):
> +        """
> +        :avocado: tags=machine:pc
> +        :avocado: tags=accel:tcg
> +        """
> +        self.run_rr(shift=1)
> +
> +    def test_pc_q35(self):
> +        """
> +        :avocado: tags=machine:q35
> +        :avocado: tags=accel:tcg
> +        """
> +        self.run_rr(shift=3)
>
>