Bug 1415471 - Adding host to engine failed at first time but host was auto recovered after several mins [NEEDINFO]
Summary: Adding host to engine failed at first time but host was auto recovered after ...
Alias: None
Product: ovirt-engine
Classification: oVirt
Component: General
Hardware: Unspecified
OS: Unspecified
Target Milestone: ovirt-4.1.1
: 4.1.1
Assignee: Yevgeny Zaspitsky
QA Contact: Michael Burman
Depends On:
Blocks: 1420239
TreeView+ depends on / blocked
Reported: 2017-01-22 10:30 UTC by dguo
Modified: 2017-04-21 09:39 UTC (History)
19 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1420239 (view as bug list)
Last Closed: 2017-04-21 09:39:02 UTC
oVirt Team: Network
eedri: needinfo? (jmoon)
rule-engine: ovirt-4.1+
rule-engine: blocker+
cshao: testing_ack+

Attachments (Terms of Use)
engine log (142.62 KB, text/plain)
2017-01-22 10:30 UTC, dguo
no flags Details
host deploy log (513.74 KB, text/plain)
2017-01-22 10:32 UTC, dguo
no flags Details
vdsm (10.27 KB, application/x-gzip)
2017-01-22 10:33 UTC, dguo
no flags Details
network scripts (44.15 KB, application/x-gzip)
2017-01-22 10:33 UTC, dguo
no flags Details

System ID Private Priority Status Summary Last Updated
oVirt gerrit 71452 0 master MERGED engine: refactor HostConnectivityChecker 2017-02-05 19:38:53 UTC
oVirt gerrit 71682 0 master MERGED engine: overcome VDSM recovery in PollVDSCommand 2017-02-07 11:45:30 UTC
oVirt gerrit 71776 0 ovirt-engine-4.1 MERGED engine: refactor HostConnectivityChecker 2017-02-08 08:26:47 UTC
oVirt gerrit 71777 0 ovirt-engine-4.1 MERGED engine: overcome VDSM recovery in PollVDSCommand 2017-02-08 08:26:51 UTC

Description dguo 2017-01-22 10:30:22 UTC
Created attachment 1243307 [details]
engine log

Description of problem:
dding rhvh to engine failed at first time but rhvh was autorecovered after several mins

Version-Release number of selected component (if applicable):
Red Hat Virtualization Manager Version:

How reproducible:

Steps to Reproduce:
1. Install a rhvh4.1
2. Reboot the rhvh
3. Add host to engine

Actual results:
1. After step #3, add host to engine failed
2. When adding host to engine failed, wait for 2 mins, the rhvh were recover automatically and status up on rhvm side. 

Expected results:
1. After step#3, the host can be added to engine successfully without any error

Additional info:
Modify "VDSM/disableNetworkManager=bool:False" in /etc/ovirt-host-deploy.conf.d/90-ngn-do-not-keep-networkmanager.conf, also caught this erro

Comment 1 dguo 2017-01-22 10:32:54 UTC
Created attachment 1243308 [details]
host deploy log

Comment 2 dguo 2017-01-22 10:33:19 UTC
Created attachment 1243309 [details]

Comment 3 dguo 2017-01-22 10:33:44 UTC
Created attachment 1243310 [details]
network scripts

Comment 4 dguo 2017-01-22 10:37:10 UTC
No such issue in previous build, so it'a regression.

Comment 5 Ryan Barry 2017-01-22 15:13:02 UTC
Is this reproducible on RHEL?

Comment 6 dguo 2017-01-23 03:53:01 UTC
(In reply to Ryan Barry from comment #5)
> Is this reproducible on RHEL?

Yes, also can be caught on RHEL7.3

[root@rhel7 ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 7.3 (Maipo)
[root@rhel7 ~]# rpm -qa|grep vdsm

Comment 7 Dan Kenigsberg 2017-01-23 13:18:06 UTC
Does it happen only with disableNetworkManager=False?

Comment 8 Piotr Kliczewski 2017-01-23 13:18:46 UTC
It seems that vdsm was in recovery mode:

2017-01-22 04:10:19,584-05 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.PollVDSCommand] (org.ovirt.thread.pool-7-thread-22) [67c967f0] Error: Recovering from crash or Initializing

Comment 9 Sandro Bonazzola 2017-01-23 13:26:14 UTC
Proposing as blocker for 4.1

Comment 10 Ying Cui 2017-01-23 13:52:38 UTC
(In reply to Dan Kenigsberg from comment #7)
> Does it happen only with disableNetworkManager=False?

Yes, in bug description "VDSM/disableNetworkManager=bool:False" in /etc/ovirt-host-deploy.conf.d/90-ngn-do-not-keep-networkmanager.conf.

Comment 11 dguo 2017-01-24 09:17:04 UTC
Maybe not clear for additional info in the description, I should clarify that:

I have tested below two scenarios, both encounter this bug.

1. "VDSM/disableNetworkManager=bool:False" in /etc/ovirt-host-deploy.conf.d/90-ngn-do-not-keep-networkmanager.conf
After registering engine, the NM daemon is kept running.

2. "VDSM/disableNetworkManager=bool:True" in /etc/ovirt-host-deploy.conf.d/90-ngn-do-not-keep-networkmanager.conf
After registering engine, the NM daemon is not running.

Comment 12 Michael Burman 2017-01-26 08:35:21 UTC

I managed to reproduce this issue one time few days ago(with rhel server).
Note that although the  host was auto recovred the 'ovirtmgmt' network wasn't persisted and such host won't come up after reboot.

Comment 13 Edward Haas 2017-01-31 08:29:27 UTC
I am not seeing any issue on the networking side.

Setup started @04:10:20 and ended @04:10:49
It took 20sec for DHCP to return the same IP on the management bridge and then connectivity check succeeded and returned back an OK.

I am not clear what happened on the engine side, it makes sense for it to loose connectivity for 20sec but it should have recovered. the pings seem to have arrived to VDSM (see vdsm.log) so I am not clear what are the errors in the Engine logs.

Comment 14 Piotr Kliczewski 2017-01-31 08:55:52 UTC
I suggest to attempt to reproduce it with the latest jsonrpc in version 1.3.8.

Comment 15 Edward Haas 2017-01-31 11:23:48 UTC
We seem to have several points that need treatment (but not related):
- On host deploy, when starting vdsmd, it may take a while until VDSM can actually service incoming requests (it is in recovery mode). It makes sense to block on service start until VDSM is indeed ready to accept requests.

- Based on Engine logs, the first flow of setupNetworks attempt (after the deploy scripts) failed because of VDSM being in recovery state and it has not handled such a case (Engine does not expect VDSM to be in recovery state).

- It is not exactly clear why, but after the first flow failure mentioned above another flow is created and issues an additional setupNetworks that is handled by VDSM but fails on Engine side due to RPC connectivity problem.

For the 2nd point, yzaspits is posting a proposed patch.

Comment 17 Michael Burman 2017-02-13 08:56:09 UTC
Verified on - rhevm-4.1.1-0.1.el7.noarch

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