Dear colleagues,
while trying to setup Octavia, I faced the problem of connecting amphora
agent to VIP network.
*Environment:
*Octavia 1.0.1 (installed by using "pip install")
Openstack Pike:
- Nova 16.0.1
- Neutron 11.0.1
- Keystone 12.0.0
*Topology of testbed:*
+
|
| +----+
+ +----+ n1 |
| +---------+ | +----+
+----+ Amphora +----+
| +---------+ | +----+
m | l +----+ n2 |
g | b | +----+ + e
m | t | | x
t | | +----+ | t
| s +----+ vR +----+ e
| u | +----+ | r
+------------+ b | | n
| Controller | n | | a
+------------+ e | + l
t |
+
*Summary:*
$ openstack loadbalancer create --name nlb2 --vip-subnet-id lbt-subnet
$ openstack loadbalancer list
+--------------------------------------+------+----------------------------------+-------------+---------------------+----------+
| id | name |
project_id | vip_address | provisioning_status |
provider |
+--------------------------------------+------+----------------------------------+-------------+---------------------+----------+
| 93facca0-d39a-44e0-96b6-28efc1388c2d | nlb2 |
d8051a3ff3ad4c4bb380f828992b8178 | 1.1.1.16 | ACTIVE |
octavia |
+--------------------------------------+------+----------------------------------+-------------+---------------------+----------+
$ openstack server list --all
+--------------------------------------+----------------------------------------------+--------+-------------------------------------------------+---------+--------+
| ID |
Name | Status |
Networks | Image | Flavor |
+--------------------------------------+----------------------------------------------+--------+-------------------------------------------------+---------+--------+
| 98ae591b-0270-4625-95eb-a557c1452eef |
amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab | ACTIVE |
lb-mgmt-net=172.16.252.28; lbt-net=1.1.1.11 | amphora | |
| cc79ca78-b036-4d55-a4bd-5b3803ed2f9b |
lb-n1 | ACTIVE |
lbt-net=1.1.1.18 | | B-cup |
| 6c43ccca-c808-44cf-974d-acdbdb4b26db |
lb-n2 | ACTIVE |
lbt-net=1.1.1.19 | | B-cup |
+--------------------------------------+----------------------------------------------+--------+-------------------------------------------------+---------+--------+
This output shows that amphora agent is active with two interfaces,
connected to management and project's networks (lb-mgmt-net and lbt-net
respectively). BUT in fact there is no interface to lbt-net on the
agent's VM:
*ubuntu@amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab:~$* ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1
[ ... ]
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP group default qlen 1000
link/ether d0:1c:a0:58:e0:02 brd ff:ff:ff:ff:ff:ff
inet 172.16.252.28/22 brd 172.16.255.255 scope global eth0
*ubuntu@amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab:~$* ls /sys/class/net/
_eth0_ _lo_
*ubuntu@amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab:~$*
The issue is that eth1 exists during start of agent's VM and then it
magically disappears (snipped from syslog, note timing):
Nov 7 12:00:31 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1051]: DHCPREQUEST of 1.1.1.11 on eth1 to 255.255.255.255 port
67 (xid=0x1c65db9b)
Nov 7 12:00:31 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1051]: DHCPOFFER of 1.1.1.11 from 1.1.1.10
Nov 7 12:00:31 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1051]: DHCPACK of 1.1.1.11 from 1.1.1.10
Nov 7 12:00:31 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1051]: bound to 1.1.1.11 -- renewal in 38793 seconds.
[ ... ]
Nov 7 12:00:44 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1116]: receive_packet failed on eth1: Network is down
Nov 7 12:00:44 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab systemd[1]:
Stopping ifup for eth1...
Nov 7 12:00:44 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1715]: Killed old client process
Nov 7 12:00:45 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
dhclient[1715]: Error getting hardware address for "eth1": No such device
Nov 7 12:00:45 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab
ifdown[1700]: Cannot find device "eth1"
Nov 7 12:00:45 amphora-038fb78e-923e-4143-8402-ad8dbd97f9ab systemd[1]:
Stopped ifup for eth1.
while
1) corresponding port in Openstack is active and owned by Nova:
$ openstack port show c4b46bea-5d49-46b5-98d9-f0f9eaf44708
+-----------------------+-------------------------------------------------------------------------+
| Field | Value |
+-----------------------+-------------------------------------------------------------------------+
| admin_state_up | UP |
| allowed_address_pairs | ip_address='1.1.1.16',
mac_address='d0:1c:a0:70:97:ba' |
| binding_host_id | bowmore |
| binding_profile | |
| binding_vif_details | datapath_type='system',
ovs_hybrid_plug='False', port_filter='True' |
| binding_vif_type | ovs |
| binding_vnic_type | normal |
| created_at | 2017-11-07T12:00:24Z |
| data_plane_status | None |
| description | |
| device_id | 98ae591b-0270-4625-95eb-a557c1452eef |
| device_owner | compute:nova |
| dns_assignment | None |
| dns_name | None |
| extra_dhcp_opts | |
| fixed_ips | ip_address='1.1.1.11',
subnet_id='dc8f0701-3553-4de1-8b65-0f9c76addf1f' |
| id | c4b46bea-5d49-46b5-98d9-f0f9eaf44708 |
| ip_address | None |
| mac_address | d0:1c:a0:70:97:ba |
| name |
octavia-lb-vrrp-038fb78e-923e-4143-8402-ad8dbd97f9ab |
| network_id | d38b53a2-52f0-460c-94f9-4eb404db28a1 |
| option_name | None |
| option_value | None |
| port_security_enabled | True |
| project_id | 1e96bb9d794f4588adcd6f32ee3fbaa8 |
| qos_policy_id | None |
| revision_number | 9 |
| security_group_ids | 29a13b95-810e-4464-b1fb-ba61c59e1fa1 |
| status | ACTIVE |
| subnet_id | None |
| tags | |
| trunk_details | None |
| updated_at | 2017-11-07T12:00:27Z |
+-----------------------+-------------------------------------------------------------------------+
2) *virsh dumpxml <**instance ID>* shows this interfaces is attached to VM
3) *openvswitch* contains this interface in configuration
4) _*BUT*_ qemu on corresponding node running with just one "-device
virtio-net-pci" parameter, which corresponds to port from management
network. No second virtio-net-pci device.
Manual detaching / attaching this interface using "nova interface-detach
/ interface-attache" *solves this issue* - interface reappear inside VM.
This problem appears only with Octavia Amphora instances - all other
servers, launched using Heat or CLI, works with two interfaces without
any problems. Relying on this, I guess that problem related to Octavia
controller.
It worth to say, that at the same time, servers n1 and n2, which are
connected to lbt-subnet, can ping each other, virtual router (vR) and
local dhcp server as well (see topology above).
*Neutron log files* shows the last activities re this ports much earlier
than disappearing of eth1 from VM:
_Controller node:_
2017-11-07 12:00:29.885 17405 DEBUG neutron.db.provisioning_blocks
[req-ae06e469-0592-46a4-bdb4-a65f47f9dee9 - - - - -] Provisioning
complete for port *c4b46bea-5d49-46b5-98d9-f0f9eaf44708* triggered by
entity L2. provisioning_complete
/usr/lib/python2.7/dist-packages/neutron/db/provisioning_blocks.py:138
2017-11-07 12:00:30.061 17405 DEBUG neutron.plugins.ml2.db
[req-ae06e469-0592-46a4-bdb4-a65f47f9dee9 - - - - -] For port
c4b46bea-5d49-46b5-98d9-f0f9eaf44708, host bowmore, got binding levels
[<neutron.plugins.ml2.models.PortBindingLevel[object at 7f74a54a3a10]
{port_id=u'*c4b46bea-5d49-46b5-98d9-f0f9eaf44708*', host=u'bowmore',
level=0, driver=u'openvswitch',
segment_id=u'7cd90f29-165a-4299-be72-51d2a2c18092'}>] get_binding_levels
/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/db.py:106
_
Compute node:_
2017-11-07 12:00:28.085 22451 DEBUG neutron.plugins.ml2.db
[req-ae06e469-0592-46a4-bdb4-a65f47f9dee9 - - - - -] For port
*c4b46bea-5d49-46b5-98d9-f0f9eaf44708*, host bowmore, got b
inding levels [<neutron.plugins.ml2.models.PortBindingLevel[object at
7f411310ccd0] {port_id=u'c4b46bea-5d49-46b5-98d9-f0f9eaf44708',
host=u'bowmore', level=0, driver=u'openvswit
ch', segment_id=u'7cd90f29-165a-4299-be72-51d2a2c18092'}>]
get_binding_levels
/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/db.py:106
RESP BODY: {"events": [{"status": "completed", "tag":
"*c4b46bea-5d49-46b5-98d9-f0f9eaf44708*", "name": "network-vif-plugged",
"server_uuid": "98ae591b-0270-4625-95eb-a557c1452eef"
, "code": 200}]}
2017-11-07 12:00:28.116 22451 INFO neutron.notifiers.nova [-] Nova event
response: {u'status': u'completed', u'tag':
u'*c4b46bea-5d49-46b5-98d9-f0f9eaf44708*', u'name': u'network-v
if-plugged', u'server_uuid': u'98ae591b-0270-4625-95eb-a557c1452eef',
u'code': 200}
*Octavia-worker.log* is available at the following link:
https://pastebin.com/44rwshKZ
*Q**uestion**s are* - any ideas on what is happening and which further
information and debugs I need to gather in order to resolve this issue?
Thank you.
--
Volodymyr Litovka
"Vision without Execution is Hallucination." -- Thomas Edison
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