Hi,

How many CPUs/Memory has your server?

Best regards,

Alfredo

On Mon, Oct 19, 2020 at 9:09 PM lejeczek peljasz@yahoo.co.uk wrote:

Hi guys. I'm trying to deploy with "packstack --allinone" and it always (tried ~5 times) fails with: ... ERROR : Error appeared during Puppet run:A.B.C.D_compute.pp Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: pymysql.err.OperationalError: (1040, 'Too many connections') You will find full trace in log /var/tmp/packstack/20201018-183415-ik3ijyw7/manifests/172.24.154.202_compute.pp.log Please check log file /var/tmp/packstack/20201018-183415-ik3ijyw7/openstack-setup.log for more information

If some expert might be interested then in /var/tmp/packstack/20201018-183415-ik3ijyw7/manifests/172.24.154.202_compute.pp.log .... Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[DEFAULT/compute_driver]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[vnc/server_listen]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[libvirt/virt_type]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[libvirt/cpu_mode]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[libvirt/inject_password]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[libvirt/inject_key]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt/Nova_config[libvirt/inject_partition]/ensure: created Notice: /Stage[main]/Nova::Migration::Libvirt/Nova_config[libvirt/live_migration_uri]/ensure: created Notice: /Stage[main]/Nova::Compute::Libvirt::Services/Service[libvirt]/ensure: ensure changed 'stopped' to 'running' Notice: /Stage[main]/Neutron::Deps/Anchor[neutron::service::begin]: Triggered 'refresh' from 2 events Notice: /Stage[main]/Nova::Deps/Anchor[nova::config::end]: Triggered 'refresh' from 22 events Notice: /Stage[main]/Nova::Deps/Anchor[nova::service::begin]: Triggered 'refresh' from 1 event Notice: /Stage[main]/Nova::Compute/Nova::Generic_service[compute]/Service[nova-compute]/ensure: ensure changed 'stopped' to 'running' Notice: /Stage[main]/Nova::Deps/Anchor[nova::service::end]: Triggered 'refresh' from 1 event Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: An error has occurred: Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: Traceback (most recent call last): Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2262, in _wrap_pool_connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return fn() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 294, in unique_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return _ConnectionFairy._checkout(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 751, in _checkout Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: fairy = _ConnectionRecord.checkout(pool) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 483, in checkout Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: rec = pool._do_get() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 138, in _do_get Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self._dec_overflow() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: compat.reraise(exc_type, exc_value, exc_tb) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 129, in reraise Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: raise value Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 135, in _do_get Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return self._create_connection() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 299, in _create_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return _ConnectionRecord(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 428, in __init__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self.__connect(first_connect_check=True) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 630, in __connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: connection = pool._invoke_creator(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return dialect.connect(*cargs, **cparams) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/default.py", line 453, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return self.dbapi.connect(*cargs, **cparams) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/__init__.py", line 94, in Connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return Connection(*args, **kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 325, in __init__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self.connect() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 599, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self._request_authentication() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 861, in _request_authentication Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: auth_packet = self._read_packet() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 684, in _read_packet Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: packet.check_error() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/protocol.py", line 220, in check_error Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: err.raise_mysql_exception(self._data) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/err.py", line 109, in raise_mysql_exception Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: raise errorclass(errno, errval) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: pymysql.err.OperationalError: (1040, 'Too many connections') Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns:

Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: The above exception was the direct cause of the following exception: Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns:

Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: Traceback (most recent call last): Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/nova/cmd/manage.py", line 2777, in main Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: ret = fn(*fn_args, **fn_kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/nova/cmd/manage.py", line 1144, in discover_hosts Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: by_service) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/nova/objects/host_mapping.py", line 256, in discover_hosts Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: cell_mappings = objects.CellMappingList.get_all(ctxt) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: result = fn(cls, context, *args, **kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/nova/objects/cell_mapping.py", line 256, in get_all Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: db_mappings = cls._get_all_from_db(context) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 1013, in wrapper Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: with self._transaction_scope(context): Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/contextlib.py", line 81, in __enter__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return next(self.gen) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 1063, in _transaction_scope Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: context=context) as resource: Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/contextlib.py", line 81, in __enter__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return next(self.gen) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 658, in _session Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: bind=self.connection, mode=self.mode) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 418, in _create_session Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self._start() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 510, in _start Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: engine_args, maker_args) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 534, in _setup_for_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: sql_connection=sql_connection, **engine_kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/debtcollector/renames.py", line 43, in decorator Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return wrapped(*args, **kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/engines.py", line 201, in create_engine Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: test_conn = _test_connection(engine, max_retries, retry_interval) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/oslo_db/sqlalchemy/engines.py", line 376, in _test_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return engine.connect() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2193, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return self._connection_cls(self, **kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 103, in __init__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: else engine.raw_connection() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2293, in raw_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self.pool.unique_connection, _connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2266, in _wrap_pool_connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: e, dialect, self Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1534, in _handle_dbapi_exception_noconnection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: util.raise_from_cause(newraise, exc_info) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 383, in raise_from_cause Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: reraise(type(exception), exception, tb=exc_tb, cause=cause) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 128, in reraise Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: raise value.with_traceback(tb) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2262, in _wrap_pool_connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return fn() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 294, in unique_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return _ConnectionFairy._checkout(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 751, in _checkout Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: fairy = _ConnectionRecord.checkout(pool) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 483, in checkout Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: rec = pool._do_get() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 138, in _do_get Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self._dec_overflow() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 68, in __exit__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: compat.reraise(exc_type, exc_value, exc_tb) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 129, in reraise Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: raise value Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 135, in _do_get Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return self._create_connection() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 299, in _create_connection Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return _ConnectionRecord(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 428, in __init__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self.__connect(first_connect_check=True) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 630, in __connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: connection = pool._invoke_creator(self) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/strategies.py", line 114, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return dialect.connect(*cargs, **cparams) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib64/python3.6/site-packages/sqlalchemy/engine/default.py", line 453, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return self.dbapi.connect(*cargs, **cparams) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/__init__.py", line 94, in Connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: return Connection(*args, **kwargs) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 325, in __init__ Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self.connect() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 599, in connect Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: self._request_authentication() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 861, in _request_authentication Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: auth_packet = self._read_packet() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/connections.py", line 684, in _read_packet Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: packet.check_error() Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/protocol.py", line 220, in check_error Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: err.raise_mysql_exception(self._data) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: File "/usr/lib/python3.6/site-packages/pymysql/err.py", line 109, in raise_mysql_exception Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: raise errorclass(errno, errval) Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: sqlalchemy.exc.OperationalError: (pymysql.err.OperationalError) (1040, 'Too many connections') Notice: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]/returns: (Background on this error at: http://sqlalche.me/e/e3q8) Error: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]: Failed to call refresh: 'nova-manage cell_v2 discover_hosts' returned 255 instead of one of [0] Error: /Stage[main]/Nova::Cell_v2::Discover_hosts/Exec[nova-cell_v2-discover_hosts]: 'nova-manage cell_v2 discover_hosts' returned 255 instead of one of [0]

Bit discouraging to fail at start but I trust you can share some good advice. I'm on Centos8 with ussuri. Many thanks, L.