Re: [Qemu-devel] [PATCH v3 3/5] block: qemu-iotests - test for live migration

[Kevin Wolf]

Am 10.04.2014 um 22:47 hat Jeff Cody geschrieben:
> This is an initial, simple live migration test from one
> running VM to another, using monitor commands.
> 
> This is also an example on using the new common.qemu functions
> for controlling multiple running qemu instances, for tests that
> need a live qemu vm.
> 
> Signed-off-by: Jeff Cody <address@hidden>
> ---
>  tests/qemu-iotests/090     | 97 
> ++++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/090.out | 20 ++++++++++
>  tests/qemu-iotests/group   |  1 +
>  3 files changed, 118 insertions(+)
>  create mode 100755 tests/qemu-iotests/090
>  create mode 100644 tests/qemu-iotests/090.out
> 
> diff --git a/tests/qemu-iotests/090 b/tests/qemu-iotests/090
> new file mode 100755
> index 0000000..22a7cf1
> --- /dev/null
> +++ b/tests/qemu-iotests/090
> @@ -0,0 +1,97 @@
> +#!/bin/bash
> +#
> +# Live migration test
> +#
> +# Performs a migration from one VM to another via monitor commands
> +#
> +# Copyright (C) 2014 Red Hat, Inc.
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 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 General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program.  If not, see <http://www.gnu.org/licenses/>.
> +#
> +
> +# creator
> address@hidden
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +status=1     # failure is the default!
> +
> +MIG_FIFO="${TEST_DIR}/migrate"
> +
> +_cleanup()
> +{
> +    rm -f "${MIG_FIFO}"
> +    _cleanup_qemu
> +     _cleanup_test_img
> +
> +}

There's a tab and an odd empty line in this function.

> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +. ./common.qemu
> +
> +_supported_fmt qcow2
> +_supported_proto file
> +_supported_os Linux
> +
> +size=1G
> +
> +IMGOPTS="cluster_size=512" _make_test_img $size
> +
> +mkfifo "${MIG_FIFO}"
> +
> +echo
> +echo === Starting QEMU VM1 ===
> +echo
> +
> +qemu_comm_method="monitor"
> +_launch_qemu -drive file="${TEST_IMG}",cache=none,id=disk
> +h1=$QEMU_HANDLE
> +
> +echo
> +echo === Starting QEMU VM2 ===
> +echo
> +_launch_qemu -drive file="${TEST_IMG}",cache=none,id=disk \
> +             -incoming "exec: cat '${MIG_FIFO}'"
> +h2=$QEMU_HANDLE
> +
> +echo
> +echo === VM 1: Migrate from VM1 to VM2  ===
> +echo
> +
> +silent=yes
> +_send_qemu_cmd $h1 'qemu-io disk "write 0 4M"' "(qemu)"
> +echo "vm1: qemu-io disk write complete"
> +_send_qemu_cmd $h1 "migrate \"exec: cat > '${MIG_FIFO}'\"" "(qemu)"
> +echo "vm1: live migration started"
> +qemu_cmd_repeat=20 _send_qemu_cmd $h1 "info migrate" "completed"
> +echo "vm1: live migration completed"
> +
> +echo
> +echo === VM 2: Post-migration, write to disk, verify running ===
> +echo
> +
> +_send_qemu_cmd $h2 'qemu-io disk "write 4M 1M"' "(qemu)"
> +echo "vm2: qemu-io disk write complete"
> +qemu_cmd_repeat=20 _send_qemu_cmd $h2 "info status" "running"
> +echo "vm2: qemu process running successfully"

I think we should (cleanly) shut down qemu at this point and then run a
final qemu-img check.

Kevin