openstack - systemd[1]: devstack@q-agt.service failed -


in vm(centos7.2) installed devstack:

but when check service, find devstack@q-agt.service not running.

[root@localhost ~]# systemctl status devstack@q-agt.service -l  ● devstack@q-agt.service - devstack devstack@q-agt.service    loaded: loaded (/etc/systemd/system/devstack@q-agt.service; enabled; vendor preset: disabled)    active: failed (result: exit-code) since mon 2017-08-21 22:39:24 cst; 25s ago   process: 13595 execstart=/usr/bin/neutron-openvswitch-agent --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini (code=exited, status=1/failure)  main pid: 13595 (code=exited, status=1/failure)  aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron   file "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 214, in main aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron     result = function(*args, **kwargs) aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron   file "/usr/lib/python2.7/site-packages/ryu/lib/hub.py", line 65, in _launch aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron     raise e aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron exception: not retrieve schema tcp:127.0.0.1:6640: connection refused aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: error neutron  aug 21 22:39:24 localhost.localdomain neutron-openvswitch-agent[13595]: info oslo_rootwrap.client [-] stopping rootwrap daemon process pid=13632 aug 21 22:39:24 localhost.localdomain systemd[1]: devstack@q-agt.service: main process exited, code=exited, status=1/failure aug 21 22:39:24 localhost.localdomain systemd[1]: unit devstack@q-agt.service entered failed state. aug 21 22:39:24 localhost.localdomain systemd[1]: devstack@q-agt.service failed.

i tried restart service failed, how avoid it?

edit

and in /var/log/message found below error message :

... aug 21 22:50:16 localhost ovsdb-server: ovs|09137|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 22:50:16 localhost ovsdb-server: ovs|09138|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 22:50:16 localhost ovsdb-server: ovs|09139|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 22:50:16 localhost ovsdb-server: ovs|09140|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 22:50:16 localhost ovs-vsctl: ovs|00002|db_ctl_base|err|transaction error: {"details":"transaction causes multiple rows in \"manager\" table have identical values (\"ptcp:6640:127.0.0.1\") index on column \"target\".  first row, uuid 5ec22779-d307-403c-a2d7-e61a739be275, inserted transaction.  second row, uuid cb472941-4441-4b92-8777-694aa1278310, existed in database before transaction , not modified transaction.","error":"constraint violation"} aug 21 22:50:16 localhost ovsdb-server: ovs|09141|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 22:50:16 localhost ovsdb-server: ovs|09142|socket_util|err|6640:127.0.0.1: bind: permission denied

edit-2

i use journal -xe, below message:

[root@localhost log]# journalctl -xe  aug 21 15:50:52 localhost.localdomain neutron-dhcp-agent[809]: debug neutron.agent.linux.utils [none req-3622b1b8-b9a9-4cd1-8052-f5ed84fb23d2 none none] ru aug 21 15:50:52 localhost.localdomain ovs-vsctl[60986]: ovs|00001|vsctl|info|called /bin/ovs-vsctl --timeout=5 --id=@manager -- create manager "target=\ aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37066|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37067|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37068|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37069|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovs-vsctl[60986]: ovs|00002|db_ctl_base|err|transaction error: {"details":"transaction causes multiple rows in \"mana aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37070|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37071|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37072|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain neutron-server[823]: debug neutron.db.l3_hamode_db [none req-dfe6e11a-7b36-4b08-8f96-d2a65bdd5310 none none] neutron. aug 21 15:50:52 localhost.localdomain neutron-server[823]: 653d-39f3-4b3d-9ac1-cf4cf88634e5'}], 'binding:host_id': u'localhost.localdomain', 'description': aug 21 15:50:52 localhost.localdomain neutron-server[823]: ': [{'subnet_id': u'1a1b1d44-9dfb-477c-bb7a-3b05ebadc5a2', 'prefixlen': 24, 'ip_address': u'172. aug 21 15:50:52 localhost.localdomain neutron-server[823]: debug neutron.api.rpc.handlers.l3_rpc [none req-dfe6e11a-7b36-4b08-8f96-d2a65bdd5310 none none]  aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron_lib.callbacks.manager [-] notify callbacks [] router, before_update {{(pid=8 aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron.agent.l3.router_info [-] process router updates {{(pid=805) process /opt/stack/n aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron.agent.l3.router_info [-] adding internal network: prefix(qr-), port(2f63fdd1-93a aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron.agent.linux.utils [-] running command (rootwrap daemon): ['ip', 'netns', 'exec', aug 21 15:50:52 localhost.localdomain kernel: selinux: initialized (dev sysfs, type sysfs), uses genfs_contexts aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron.agent.linux.utils [-] running command: ['ip', '-o', 'link', 'show', 'br-int'] {{ aug 21 15:50:52 localhost.localdomain neutron-l3-agent[805]: debug neutron.agent.linux.utils [-] running command (rootwrap daemon): ['ovs-vsctl', '--timeou aug 21 15:50:52 localhost.localdomain ovs-vsctl[60994]: ovs|00001|vsctl|info|called /bin/ovs-vsctl --timeout=5 --id=@manager -- create manager "target=\ aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37073|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37074|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37075|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37076|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovs-vsctl[60994]: ovs|00002|db_ctl_base|err|transaction error: {"details":"transaction causes multiple rows in \"mana aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37077|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37078|socket_util|err|6640:127.0.0.1: bind: permission denied aug 21 15:50:52 localhost.localdomain ovsdb-server[898]: ovs|37079|socket_util|err|6640:127.0.0.1: bind: permission denied


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