def delete(self, pool, force=True):
"""Delete an aggregate.
pool can be an aggregate name or an aggregate id.
Remove all hosts before delete aggregate (default).
If force is False, raise exception if at least one
host is attached to.
"""
agg = self.get_aggregate_from_name_or_id(pool)
hosts = agg.hosts
if len(hosts) > 0 and not force:
raise manager_exceptions.AggregateHaveHost(name=agg.name,
hosts=agg.hosts)
try:
freepool_agg = self.get(self.freepool_name)
except manager_exceptions.AggregateNotFound:
raise manager_exceptions.NoFreePool()
for host in hosts:
LOG.debug("Removing host '%(host)s' from aggregate '%(id)s')", {
'host': host,
'id': agg.id
})
self.nova.aggregates.remove_host(agg.id, host)
if freepool_agg.id != agg.id and host not in freepool_agg.hosts:
self.nova.aggregates.add_host(freepool_agg.id, host)
self.nova.aggregates.delete(agg.id)
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)
