def add_computehost(self, pool, host, stay_in=False):
"""Add a compute host to an aggregate.
The `host` must exist otherwise raise an error
and the `host` must be in the freepool.
:param pool: Name or UUID of the pool to rattach the host
:param host: Name (not UUID) of the host to associate
:type host: str
Return the related aggregate.
Raise an aggregate exception if something wrong.
"""
agg = self.get_aggregate_from_name_or_id(pool)
try:
freepool_agg = self.get(self.freepool_name)
except manager_exceptions.AggregateNotFound:
raise manager_exceptions.NoFreePool()
if freepool_agg.id != agg.id and not stay_in:
if host not in freepool_agg.hosts:
raise manager_exceptions.HostNotInFreePool(
host=host, freepool_name=freepool_agg.name)
LOG.info(
"removing host '%(host)s' from aggregate freepool "
"%(name)s", {
'host': host,
'name': freepool_agg.name
})
try:
self.remove_computehost(freepool_agg.id, host)
except nova_exception.NotFound:
raise manager_exceptions.HostNotFound(host=host)
LOG.info("adding host '%(host)s' to aggregate %(id)s", {
'host': host,
'id': agg.id
})
try:
return self.nova.aggregates.add_host(agg.id, host)
except nova_exception.NotFound:
raise manager_exceptions.HostNotFound(host=host)
except nova_exception.Conflict:
raise manager_exceptions.AggregateAlreadyHasHost(pool=pool,
host=host)
def remove_computehost(self, pool, hosts):
"""Remove compute host(s) from an aggregate."""
if not isinstance(hosts, list):
hosts = [hosts]
agg = self.get_aggregate_from_name_or_id(pool)
try:
freepool_agg = self.get(self.freepool_name)
except manager_exceptions.AggregateNotFound:
raise manager_exceptions.NoFreePool()
hosts_failing_to_remove = []
hosts_failing_to_add = []
hosts_not_in_freepool = []
for host in hosts:
if freepool_agg.id == agg.id:
if host not in freepool_agg.hosts:
hosts_not_in_freepool.append(host)
continue
try:
self.nova.aggregates.remove_host(agg.id, host)
except nova_exception.ClientException:
hosts_failing_to_remove.append(host)
if freepool_agg.id != agg.id and host not in freepool_agg.hosts:
# NOTE(sbauza) : We don't want to put again the host in
# freepool if the requested pool is the freepool...
try:
self.nova.aggregates.add_host(freepool_agg.id, host)
except nova_exception.ClientException:
hosts_failing_to_add.append(host)
if hosts_failing_to_remove:
raise manager_exceptions.CantRemoveHost(
host=hosts_failing_to_remove, pool=agg)
if hosts_failing_to_add:
raise manager_exceptions.CantAddHost(host=hosts_failing_to_add,
pool=freepool_agg)
if hosts_not_in_freepool:
raise manager_exceptions.HostNotInFreePool(
host=hosts_not_in_freepool, freepool_name=freepool_agg.name)
def add_computehost(self, pool, hosts, stay_in=False):
"""Add compute host(s) to an aggregate.
Each host must exist and be in the freepool, otherwise raise an error.
:param pool: Name or UUID of the pool to rattach the host
:param hosts: Names (not UUID) of hosts to associate
:type host: str or list of str
Return the related aggregate.
Raise an aggregate exception if something wrong.
"""
if not isinstance(hosts, list):
hosts = [hosts]
added_hosts = []
removed_hosts = []
agg = self.get_aggregate_from_name_or_id(pool)
try:
freepool_agg = self.get(self.freepool_name)
except manager_exceptions.AggregateNotFound:
raise manager_exceptions.NoFreePool()
try:
for host in hosts:
if freepool_agg.id != agg.id and not stay_in:
if host not in freepool_agg.hosts:
raise manager_exceptions.HostNotInFreePool(
host=host, freepool_name=freepool_agg.name)
LOG.info(
"removing host '%(host)s' from freepool "
"aggregate %(name)s", {
'host': host,
'name': freepool_agg.name
})
try:
self.remove_computehost(freepool_agg.id, host)
removed_hosts.append(host)
except nova_exception.NotFound:
raise manager_exceptions.HostNotFound(host=host)
LOG.info("adding host '%(host)s' to aggregate %(id)s", {
'host': host,
'id': agg.id
})
try:
self.nova.aggregates.add_host(agg.id, host)
added_hosts.append(host)
except nova_exception.NotFound:
raise manager_exceptions.HostNotFound(host=host)
except nova_exception.Conflict as e:
raise manager_exceptions.AggregateAlreadyHasHost(
pool=pool, host=host, nova_exception=str(e))
except Exception as e:
if added_hosts:
LOG.warn('Removing hosts added to aggregate %s: %s', agg.id,
added_hosts)
for host in added_hosts:
self.nova.aggregates.remove_host(agg.id, host)
if removed_hosts:
LOG.warn('Adding hosts back to freepool: %s', removed_hosts)
for host in removed_hosts:
self.nova.aggregates.add_host(freepool_agg.id, host)
raise e
return self.get_aggregate_from_name_or_id(pool)
