qemu: 1.5.3
libvirt: 1.2.17
二、冷迁移的排错经历
如果nova-scheduler节点nova.conf中的scheduler_default_filters配置项有AvailabilityZoneFilter这个配置,然后改了availability-zone(默认为nova),改为其它名字。 冷迁移的时候走调度,结果AvailabilityZoneFilter过滤后没有匹配的主机了。
class AvailabilityZoneFilter(filters.BaseHostFilter):
"""Filters Hosts by availability zone.
Works with aggregate metadata availability zones, using the key
'availability_zone'
Note: in theory a compute node can be part of multiple availability_zones
"""
# Availability zones do not change within a request
run_filter_once_per_request = True
def host_passes(self, host_state, filter_properties):
spec = filter_properties.get('request_spec', {})
props = spec.get('instance_properties', {})
availability_zone = props.get('availability_zone')
if not availability_zone: #第一次创建虚拟机的时候,还有availability_zone,返回是true
return True
metadata = utils.aggregate_metadata_get_by_host( #对已创建好的虚拟机;有两种判断
host_state, key='availability_zone')
if 'availability_zone' in metadata: #1、给主机聚合设置元数据
hosts_passes = availability_zone in metadata['availability_zone']
host_az = metadata['availability_zone']
else:
hosts_passes = availability_zone == CONF.default_availability_zone #2、跟default_availability_zone(默认也为nova)配置项比较
host_az = CONF.default_availability_zone
if not hosts_passes:
LOG.debug("Availability Zone '%(az)s' requested. "
"%(host_state)s has AZs: %(host_az)s",
{'host_state': host_state,
'az': availability_zone,
'host_az': host_az})
return hosts_passes