[OSSTEST Nested PATCH v9 7/9] Add new script to customize nested test configuration

["longtao.pang" <longtaox.pang@intel.com>]

From: "longtao.pang" <longtaox.pang@intel.com>

1. In this script, make some appropriate runvars which selecthost would
recognise.
2. Prepare the configurations for installing L2 guest VM.
3. Create a lv disk in L0 and hot-attach it to L1, need to restart L1 to
make the block disk to be recognized by L1 system, then using this disk
to create a VG that used for installing L2.

Signed-off-by: longtao.pang <longtaox.pang@intel.com>
---
Changes in v9:
1. For L1, identical its ident and guestname as 'nestedl1'.
2. Reuse Ian Campbell's v5_patch[04,05,06] to avoid duplicated codes
about 'ssh host keys' and 'overlays' when installing nested guest VM.
3. Refactor LV disk creating for L2 guest.
---
 ts-nested-setup |   66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100755 ts-nested-setup

diff --git a/ts-nested-setup b/ts-nested-setup
new file mode 100755
index 0000000..566186c
--- /dev/null
+++ b/ts-nested-setup
@@ -0,0 +1,66 @@
+#!/usr/bin/perl -w
+# This is part of "osstest", an automated testing framework for Xen.
+# Copyright (C) 2015 Intel Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use strict qw(vars);
+use DBI;
+use Osstest;
+use Osstest::Debian;
+use Osstest::TestSupport;
+
+tsreadconfig();
+# Pass L0's ident and L1's guestname
+our ($l0_ident,$l1_gn) = @ARGV;
+our ($l0,$l1) = ts_get_host_guest($l0_ident,$l1_gn);
+
+guest_check_ip($l1);
+# L1 guest's ident is same as guestname
+our $l1_ident = $l1->{Guest};
+
+store_runvar($l1_ident,$l1->{Guest});
+store_runvar("${l1_ident}_ip",$l1->{Ip});
+
+# Since Ian Campbell's v5_patch[04,05,06] has a bug that the
+# 'preseed/late_command' are unavailable, so add below line here to
+# make HTTP URL entry available in sources.list for L1 hvm guest.
+# Onece the bug is fiexed, this line code could be removed.
+target_cmd_root($l1, "sed -i 's/^deb *cdrom/#&/g' /etc/apt/sources.list");
+target_cmd_root($l1, "update-rc.d osstest-confirm-booted start 99 2 .");
+
+# Inside L0, create storage lv, attach this lv to L1, and then inside L1 using the storage for installing L2
+my $vgname = $l1->{Vg};
+my $guest_storage_lv_name = "${l1_ident}_guest_storage";
+my $guest_storage_lv_size = guest_var($l1,'guest_storage_size',undef);
+my $guest_storage_lvdev = "/dev/${vgname}/${guest_storage_lv_name}";
+
+target_cmd_root($l0, <<END);
+    lvremove -f $guest_storage_lvdev ||:
+    lvcreate -L ${guest_storage_lv_size}M -n $guest_storage_lv_name $vgname
+    dd if=/dev/zero of=$guest_storage_lvdev count=10
+    xl block-attach $l1->{Name} ${guest_storage_lvdev},raw,sdb,rw
+END
+# This is probably a bug here, if we use 'xvdx' as block 'dev'
+# after installing xen and boot into xen kernel, the disk will not be
+# recognized by OS. Also, if we use 'sde' instead of 'sdb' as block 'dev',
+# after installing xen and boot into xen kernel, the disk will be recognized
+# as 'sdb' not 'sde', so we will have to use 'sdb' here.
+
+target_install_packages_norec($l1, qw(lvm2 rsync genisoimage));
+# After block-attach lvdev to L1, need to reboot L1 to make the attach
+# to take effect. I think this is a bug for kernel.
+target_reboot($l1);
+# Create a vg in L1 guest and vg name is ${l1_gn}-disk
+target_cmd_root($l1, "pvcreate /dev/xvdb && vgcreate ${l1_gn}-disk /dev/xvdb");
-- 
1.7.10.4