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Add post-test hook for testing evacuate

This adds a post-test bash script to test evacuate
in a multinode job.

This performs two tests:

1. A negative test where we inject a fault by stopping
   libvirt prior to the evacuation and wait for the
   server to go to ERROR status.

2. A positive where we restart libvirt, wait for the
   compute service to be enabled and then evacuate
   the server and wait for it to be ACTIVE.

For now we hack this into the nova-live-migration
job, but it should probably live in a different job
long-term.

Change-Id: I9b7c9ad6b0ab167ba4583681efbbce4b18941178
changes/74/602174/15
Matt Riedemann 3 years ago
parent
commit
8327011f91
  1. 4
      .zuul.yaml
  2. 115
      gate/test_evacuate.sh
  3. 2
      nova/tests/live_migration/hooks/run_tests.sh
  4. 1
      playbooks/legacy/nova-live-migration/run.yaml

4
.zuul.yaml

@ -80,6 +80,10 @@
- job:
name: nova-live-migration
parent: nova-dsvm-multinode-base
description: |
Run tempest live migration tests against both local storage and shared
storage using ceph (the environment is reconfigured for ceph after the
local storage tests are run). Also runs simple evacuate tests.
run: playbooks/legacy/nova-live-migration/run.yaml
post-run: playbooks/legacy/nova-live-migration/post.yaml

115
gate/test_evacuate.sh

@ -0,0 +1,115 @@
#!/bin/bash -x
BASE=${BASE:-/opt/stack}
# Source stackrc to determine the configured VIRT_DRIVER
source ${BASE}/new/devstack/stackrc
set -e
# We need to get the admin credentials to run CLIs.
set +x
source ${BASE}/new/devstack/openrc admin
set -x
if [[ ${VIRT_DRIVER} != libvirt ]]; then
echo "Only the libvirt driver is supported by this script"
exit 1
fi
echo "Ensure we have at least two compute nodes"
nodenames=$(openstack hypervisor list -f value -c 'Hypervisor Hostname')
node_count=$(echo ${nodenames} | wc -w)
if [[ ${node_count} -lt 2 ]]; then
echo "Evacuate requires at least two nodes"
exit 2
fi
echo "Finding the subnode"
subnode=''
local_hostname=$(hostname -s)
for nodename in ${nodenames}; do
if [[ ${local_hostname} != ${nodename} ]]; then
subnode=${nodename}
break
fi
done
# Sanity check that we found the subnode.
if [[ -z ${subnode} ]]; then
echo "Failed to find subnode from nodes: ${nodenames}"
exit 3
fi
echo "Creating test server on subnode"
image=$(openstack image list -f value -c Name | awk 'NR==1{print $1}')
flavor=$(openstack flavor list -f value -c Name | awk 'NR==1{print $1}')
openstack server create --image ${image} --flavor ${flavor} \
--availability-zone nova:${subnode} --wait evacuate-test
echo "Forcing down the subnode so we can evacuate from it"
openstack --os-compute-api-version 2.11 compute service set --down ${subnode} nova-compute
echo "Stopping libvirt on the localhost before evacuating to trigger failure"
sudo systemctl stop libvirt-bin
# Now force the evacuation to *this* host; we have to force to bypass the
# scheduler since we killed libvirtd which will trigger the libvirt compute
# driver to auto-disable the nova-compute service and then the ComputeFilter
# would filter out this host and we'd get NoValidHost. Normally forcing a host
# during evacuate and bypassing the scheduler is a very bad idea, but we're
# doing a negative test here.
# TODO(mriedem): Use OSC when it supports evacuate.
echo "Forcing evacuate to local host"
nova evacuate --force evacuate-test ${local_hostname}
# Wait for the instance to go into ERROR state from the failed evacuate.
count=0
status=$(openstack server show evacuate-test -f value -c status)
while [ "${status}" != "ERROR" ]
do
sleep 1
count=$((count+1))
if [ ${count} -eq 30 ]; then
echo "Timed out waiting for server to go to ERROR status"
exit 4
fi
status=$(openstack server show evacuate-test -f value -c status)
done
echo "Now restart libvirt and perform a successful evacuation"
sudo systemctl start libvirt-bin
sleep 10
# Wait for the compute service to be enabled.
count=0
status=$(openstack compute service list --host ${local_hostname} --service nova-compute -f value -c Status)
while [ "${status}" != "enabled" ]
do
sleep 1
count=$((count+1))
if [ ${count} -eq 30 ]; then
echo "Timed out waiting for local compute service to be enabled"
exit 5
fi
status=$(openstack compute service list --host ${local_hostname} --service nova-compute -f value -c Status)
done
nova evacuate evacuate-test
# Wait for the instance to go into ACTIVE state from the evacuate.
count=0
status=$(openstack server show evacuate-test -f value -c status)
while [ "${status}" != "ACTIVE" ]
do
sleep 1
count=$((count+1))
if [ ${count} -eq 30 ]; then
echo "Timed out waiting for server to go to ACTIVE status"
exit 6
fi
status=$(openstack server show evacuate-test -f value -c status)
done
# Make sure the server moved.
host=$(openstack server show evacuate-test -f value -c OS-EXT-SRV-ATTR:host)
if [[ ${host} != ${local_hostname} ]]; then
echo "Unexpected host ${host} for server after evacuate."
exit 7
fi

2
nova/tests/live_migration/hooks/run_tests.sh

@ -28,6 +28,8 @@ echo '1. test with all local storage (use default for volumes)'
echo 'NOTE: test_volume_backed_live_migration is skipped due to https://bugs.launchpad.net/nova/+bug/1524898'
run_tempest "block migration test" "^.*test_live_migration(?!.*(test_volume_backed_live_migration))"
# TODO(mriedem): Run $BASE/new/nova/gate/test_evacuate.sh for local storage
#all tests bellow this line use shared storage, need to update tempest.conf
echo 'disabling block_migration in tempest'
$ANSIBLE primary --sudo -f 5 -i "$WORKSPACE/inventory" -m ini_file -a "dest=$BASE/new/tempest/etc/tempest.conf section=compute-feature-enabled option=block_migration_for_live_migration value=False"

1
playbooks/legacy/nova-live-migration/run.yaml

@ -34,6 +34,7 @@
export DEVSTACK_GATE_TOPOLOGY="multinode"
function post_test_hook {
/opt/stack/new/nova/nova/tests/live_migration/hooks/run_tests.sh
$BASE/new/nova/gate/test_evacuate.sh
}
export -f post_test_hook
cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh

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