Re: [Qemu-devel] [PATCH] tests: vm: auto_install OpenBSD

[Fam Zheng <famz@redhat.com>]

On Fri, 08/24 09:22, Daniel P. Berrangé wrote:
> On Fri, Aug 24, 2018 at 09:21:26AM +0800, Fam Zheng wrote:
> > Upgrade OpenBSD to 6.3 using auto_install. Especially, drop SDL1,
> > include SDL2.
> > 
> > One limitation of this patch is that we need a temporary HTTP server on
> > host 80 port for auto_install, because slirp cannot do guest forward on
> > "host addr".
> 
> That's a pretty big limitation, as port 80 requires root privileges,
> and that's a pretty strict no for automated testing IMHO.
> 
> Why does it have to be port 80 in particular - is it not possible
> to use 8080 or even better, detect a random free port ?

OpenBSD autoinstall[1] is hardcoded to fetch from port 80. Maybe we can instead
persuade it into fetching from a different http server than 10.0.2.2. To do that
we'd need to implement a new slirp option for either "option tftp-server-name"
or "next-server" according to the manpage. I'll have to experiment with it to
see if it will work.

Or, do you think there are better options to configure the VM network to serve
the file?

(Another possibility is to inject the install.conf file into bsd.rd (ramdisk
embedded in ELF), but the tools seem OpenBSD specific.)

[1] https://man.openbsd.org/autoinstall

> 
> > 
> > Signed-off-by: Fam Zheng <famz@redhat.com>
> > ---
> >  tests/vm/basevm.py | 28 ++++++++++++++--
> >  tests/vm/openbsd   | 81 ++++++++++++++++++++++++++++++++++++++++------
> >  2 files changed, 96 insertions(+), 13 deletions(-)
> > 
> > diff --git a/tests/vm/basevm.py b/tests/vm/basevm.py
> > index d7149dea7d..4080039e66 100755
> > --- a/tests/vm/basevm.py
> > +++ b/tests/vm/basevm.py
> > @@ -65,8 +65,6 @@ class BaseVM(object):
> >              self._stdout = self._devnull
> >          self._args = [ \
> >              "-nodefaults", "-m", "4G",
> > -            "-netdev", "user,id=vnet,hostfwd=:127.0.0.1:0-:22",
> > -            "-device", "virtio-net-pci,netdev=vnet",
> >              "-vnc", "127.0.0.1:0,to=20",
> >              "-serial", "file:%s" % os.path.join(self._tmpdir, "serial.out")]
> >          if vcpus:
> > @@ -145,8 +143,10 @@ class BaseVM(object):
> >                              "-device",
> >                              "virtio-blk,drive=%s,serial=%s,bootindex=1" % (name, name)]
> >  
> > -    def boot(self, img, extra_args=[]):
> > +    def boot(self, img, extra_args=[], extra_usernet_args=""):
> >          args = self._args + [
> > +            "-netdev", "user,id=vnet,hostfwd=:127.0.0.1:0-:22" + extra_usernet_args,
> > +            "-device", "virtio-net-pci,netdev=vnet",
> >              "-device", "VGA",
> >              "-drive", "file=%s,if=none,id=drive0,cache=writeback" % img,
> >              "-device", "virtio-blk,drive=drive0,bootindex=0"]
> > @@ -196,6 +196,28 @@ class BaseVM(object):
> >      def qmp(self, *args, **kwargs):
> >          return self._guest.qmp(*args, **kwargs)
> >  
> > +    def start_http_server(self, workdir, ports=range(8010, 8020), sudo=False):
> > +        p = None
> > +        token = "%d-%d" % (os.getpid(), time.time())
> > +        with open(os.path.join(workdir, token), "w") as f:
> > +            f.write("# QEMU VM testing HTTP server token file #")
> > +            f.flush()
> > +        for port in ports:
> > +            cmd = ["python3", "-m", "http.server", str(port)]
> > +            if sudo:
> > +                cmd = ["sudo", "-n"] + cmd
> > +            p = subprocess.Popen(cmd, cwd=workdir)
> > +            for retry in range(5):
> > +                if p.poll() != None:
> > +                    break
> > +                if subprocess.call("curl http://127.0.0.1:%d/%s &>/dev/null" % \
> > +                        (port, token),
> > +                                   shell=True) == 0:
> > +                    atexit.register(p.terminate)
> > +                    return port
> > +                time.sleep(0.3)
> > +        raise IOError("Failed to start HTTP server")
> > +
> >  def parse_args(vm_name):
> >      parser = optparse.OptionParser(
> >          description="VM test utility.  Exit codes: "
> > diff --git a/tests/vm/openbsd b/tests/vm/openbsd
> > index 52500ee52b..7e118572a9 100755
> > --- a/tests/vm/openbsd
> > +++ b/tests/vm/openbsd
> > @@ -14,6 +14,9 @@
> >  import os
> >  import sys
> >  import subprocess
> > +import time
> > +import atexit
> > +import tempfile
> >  import basevm
> >  
> >  class OpenBSDVM(basevm.BaseVM):
> > @@ -23,22 +26,80 @@ class OpenBSDVM(basevm.BaseVM):
> >          rm -rf /var/tmp/qemu-test.*
> >          cd $(mktemp -d /var/tmp/qemu-test.XXXXXX);
> >          tar -xf /dev/rsd1c;
> > -        ./configure --cc=x86_64-unknown-openbsd6.1-gcc-4.9.4 --python=python2.7 {configure_opts};
> > +        ./configure {configure_opts};
> >          gmake --output-sync -j{jobs} {verbose};
> >          # XXX: "gmake check" seems to always hang or fail
> >          #gmake --output-sync -j{jobs} check {verbose};
> >      """
> >  
> > +    def _install_os(self, img):
> > +        tmpdir = tempfile.mkdtemp()
> > +        pxeboot = self._download_with_cache("https://fastly.cdn.openbsd.org/pub/OpenBSD/6.3/amd64/pxeboot",
> > +                sha256sum="60029919798f48ea40ecb123adfed6217f099d5ed9cd1a6c7de5b544d7b7b0f6")
> > +        bsd_rd = self._download_with_cache("https://fastly.cdn.openbsd.org/pub/OpenBSD/6.3/amd64/bsd.rd",
> > +                sha256sum="1c0adb43a02ae3aee512bcf0829dac0ccb2e4d614b161049af7ce530e5da2dfc")
> > +        install = self._download_with_cache("https://fastly.cdn.openbsd.org/pub/OpenBSD/6.3/amd64/install63.iso",
> > +                sha256sum='ee775405dd7926975befbc3fef23de8c4b5a726c3b5075e4848fcd3a2a712ea8')
> > +        subprocess.check_call(["qemu-img", "create", img, "32G"])
> > +        subprocess.check_call(["cp", pxeboot, os.path.join(tmpdir, "auto_install")])
> > +        subprocess.check_call(["cp", bsd_rd, os.path.join(tmpdir, "bsd")])
> > +
> > +        self._gen_install_conf(tmpdir)
> > +        try:
> > +            self.start_http_server(tmpdir, ports=[80], sudo=True)
> > +        except Exception:
> > +            sys.stdout.write("Cannot open HTTP server on port 80. Maybe use sudo?\n")
> > +            sys.exit(1)
> > +        # BOOTP filename being auto_install makes sure OpenBSD installer
> > +        # not prompt for "auto install mode"
> > +        tftp_args = ",tftp=%s,bootfile=/auto_install" % tmpdir
> > +        self.boot(img,
> > +                  extra_args=["-boot", "once=n", "-no-reboot",
> > +                              "-cdrom", install],
> > +                  extra_usernet_args=tftp_args)
> > +        self.wait()
> > +
> > +    def _gen_install_conf(self, tmpdir):
> > +        contents = """
> > +System hostname = qemu-openbsd
> > +Password for root = qemupass
> > +Public ssh key for root = {pub_key}
> > +Allow root ssh login = yes
> > +Network interfaces = vio0
> > +IPv4 address for vio0 = dhcp
> > +Setup a user = qemu
> > +Password for user = qemupass
> > +Public ssh key for user = {pub_key}
> > +What timezone are you in = US/Eastern
> > +Server = fastly.cdn.openbsd.org
> > +Use http = yes
> > +Default IPv4 route = 10.0.2.2
> > +Location of sets = cd0
> > +Set name(s) = all
> > +Continue without verification = yes
> > +""".format(pub_key=basevm.SSH_PUB_KEY)
> > +        with open(os.path.join(tmpdir, "install.conf"), "w") as f:
> > +            f.write(contents)
> > +
> >      def build_image(self, img):
> > -        cimg = self._download_with_cache("http://download.patchew.org/openbsd-6.1-amd64.img.xz",
> > -                sha256sum='8c6cedc483e602cfee5e04f0406c64eb99138495e8ca580bc0293bcf0640c1bf')
> > -        img_tmp_xz = img + ".tmp.xz"
> > -        img_tmp = img + ".tmp"
> > -        subprocess.check_call(["cp", "-f", cimg, img_tmp_xz])
> > -        subprocess.check_call(["xz", "-df", img_tmp_xz])
> > -        if os.path.exists(img):
> > -            os.remove(img)
> > -        os.rename(img_tmp, img)
> > +
> > +        self._install_os(img + ".tmp")
> > +
> > +        self.boot(img + ".tmp")
> > +        self.wait_ssh()
> > +
> > +        self.ssh_root("usermod -G operator qemu")
> > +        self.ssh_root("echo https://fastly.cdn.openbsd.org/pub/OpenBSD > /etc/installurl")
> > +        for pkg in ["git", "gmake", "glib2", "bison", "sdl2"]:
> > +            self.ssh_root("pkg_add " + pkg)
> > +        self.ssh_root("ln -sf /usr/local/bin/python2.7 /usr/local/bin/python")
> > +        self.ssh_root("ln -sf /usr/local/bin/python2.7-2to3 /usr/local/bin/2to3")
> > +        self.ssh_root("ln -sf /usr/local/bin/python2.7-config /usr/local/bin/python-config")
> > +        self.ssh_root("ln -sf /usr/local/bin/pydoc2.7 /usr/local/bin/pydoc")
> > +        self.ssh_root("shutdown -p now")
> > +        self.wait()
> > +
> > +        subprocess.check_call(["mv", img + ".tmp", img])
> >  
> >  if __name__ == "__main__":
> >      sys.exit(basevm.main(OpenBSDVM))
> > -- 
> > 2.17.1
> > 
> 
> Regards,
> Daniel
> -- 
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