[ovirt-devel] [ OST Failure Report ] [ oVirt master ] [ 2017-08-30 ] [add_hosts]

Wed Aug 30 11:31:38 UTC 2017

On Wed, 30 Aug 2017 14:18:49 +0300
Dan Kenigsberg <danken at redhat.com> wrote:

> On Wed, Aug 30, 2017 at 1:40 PM, Barak Korren <bkorren at redhat.com>
> wrote:
> > Test failed: [ 002_bootstrap.add_hosts ]
> >
> > Link to suspected patches:
> >
> > We suspect this is due to change to LLDPAD in upstream CentOS repos.
> > We can't tell the exact point it was introduced because other
> > ovirt-engine regressions introduced too much noise into the system.
> >
> > It also seems that the failure is not 100% reproducible sine we have
> > runs that do not encounter it.
> >
> > Link to Job:
> > http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/2151
> >
> > (This job checked a specific patch to ovirt-log-collector but
> > failure seems unrelated, and also happens on vanille 'tested' repo
> > right now).
> >
> > Link to all logs:
> > VDSM logs seem to be most relevant here:
> >
> > http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/2151/artifact/exported-artifacts/basic-suit-master-el7/test_logs/basic-suite-master/post-002_bootstrap.py/lago-basic-suite-master-host-0/_var_log/vdsm/
> >
> > Error snippet from log:
> >
> > - From VDSM logs (note it exists very quickly):
> >
> > <error>
> >
> > 2017-08-30 05:55:52,208-0400 INFO  (MainThread) [vds] (PID: 4594) I
> > am the actual vdsm 4.20.2-133.git0ce4485.el7.centos
> > lago-basic-suite-master-host-0 (3.10.0-514.2.2.el7.x86_64)
> > (vdsmd:148) 2017-08-30 05:55:52,209-0400 INFO  (MainThread) [vds]
> > VDSM will run with cpu affinity: frozenset([1]) (vdsmd:254)
> > 2017-08-30 05:55:52,253-0400 INFO  (MainThread) [storage.check]
> > Starting check service (check:92)
> > 2017-08-30 05:55:52,257-0400 INFO  (MainThread) [storage.Dispatcher]
> > Starting StorageDispatcher... (dispatcher:48)
> > 2017-08-30 05:55:52,257-0400 INFO  (check/loop) [storage.asyncevent]
> > Starting <EventLoop running=True closed=False at 0x45317520>
> > (asyncevent:125)
> > 2017-08-30 05:55:52,288-0400 INFO  (MainThread) [vdsm.api] START
> > registerDomainStateChangeCallback(callbackFunc=<functools.partial
> > object at 0x2b47b50>) from=internal,
> > task_id=2cebe9ef-358e-47d7-81a6-8c4b54b9cd6d (api:46)
> > 2017-08-30 05:55:52,288-0400 INFO  (MainThread) [vdsm.api] FINISH
> > registerDomainStateChangeCallback return=None from=internal,
> > task_id=2cebe9ef-358e-47d7-81a6-8c4b54b9cd6d (api:52)
> > 2017-08-30 05:55:52,288-0400 INFO  (MainThread) [MOM] Preparing MOM
> > interface (momIF:53)
> > 2017-08-30 05:55:52,289-0400 INFO  (MainThread) [MOM] Using named
> > unix socket /var/run/vdsm/mom-vdsm.sock (momIF:62)
> > 2017-08-30 05:55:52,289-0400 INFO  (MainThread) [root] Unregistering
> > all secrets (secret:91)
> > 2017-08-30 05:55:52,307-0400 INFO  (MainThread) [vds] Setting
> > channels' timeout to 30 seconds. (vmchannels:221)
> > 2017-08-30 05:55:52,309-0400 INFO  (vmrecovery) [vds] recovery:
> > completed in 0s (clientIF:516)
> > 2017-08-30 05:55:52,310-0400 INFO  (MainThread)
> > [vds.MultiProtocolAcceptor] Listening at :::54321
> > (protocoldetector:196)
> > 2017-08-30 05:55:52,496-0400 INFO  (http) [vds] Server running
> > (http:58) 2017-08-30 05:55:52,742-0400 INFO  (periodic/1)
> > [vdsm.api] START repoStats(domains=()) from=internal,
> > task_id=85768015-8ecb-48e3-9307-f671bfc33c65 (api:46)
> > 2017-08-30 05:55:52,743-0400 INFO  (periodic/1) [vdsm.api] FINISH
> > repoStats return={} from=internal,
> > task_id=85768015-8ecb-48e3-9307-f671bfc33c65 (api:52)
> > 2017-08-30 05:55:52,743-0400 WARN  (periodic/1) [throttled] MOM not
> > available. (throttledlog:103)
> > 2017-08-30 05:55:52,744-0400 WARN  (periodic/1) [throttled] MOM not
> > available, KSM stats will be missing. (throttledlog:103)
> > 2017-08-30 05:55:55,043-0400 INFO  (MainThread) [vds] Received
> > signal 15, shutting down (vdsmd:67)
> > 2017-08-30 05:55:55,045-0400 INFO  (MainThread)
> > [jsonrpc.JsonRpcServer] Stopping JsonRPC Server (__init__:759)
> > 2017-08-30 05:55:55,049-0400 INFO  (MainThread) [vds] Stopping http
> > server (http:79)
> > 2017-08-30 05:55:55,049-0400 INFO  (http) [vds] Server stopped
> > (http:69) 2017-08-30 05:55:55,050-0400 INFO  (MainThread) [root]
> > Unregistering all secrets (secret:91)
> > 2017-08-30 05:55:55,052-0400 INFO  (MainThread) [vdsm.api] START
> > prepareForShutdown(options=None) from=internal,
> > task_id=ffde5caa-fa44-49ab-bdd1-df81519680a3 (api:46)
> > 2017-08-30 05:55:55,089-0400 INFO  (MainThread) [storage.Monitor]
> > Shutting down domain monitors (monitor:222)
> > 2017-08-30 05:55:55,090-0400 INFO  (MainThread) [storage.check]
> > Stopping check service (check:105)
> > 2017-08-30 05:55:55,090-0400 INFO  (check/loop) [storage.asyncevent]
> > Stopping <EventLoop running=True closed=False at 0x45317520>
> > (asyncevent:220)
> > 2017-08-30 05:55:55,090-0400 INFO  (MainThread) [vdsm.api] FINISH
> > prepareForShutdown return=None from=internal,
> > task_id=ffde5caa-fa44-49ab-bdd1-df81519680a3 (api:52)
> > 2017-08-30 05:55:55,091-0400 INFO  (MainThread) [vds] Stopping
> > threads (vdsmd:159)
> > 2017-08-30 05:55:55,091-0400 INFO  (MainThread) [vds] Exiting
> > (vdsmd:170)
> >
> > </error>
> >
> >
> > - From SuperVDSM logs:
> >
> > <error>
> >
> > MainThread::ERROR::2017-08-30
> > 05:55:59,476::initializer::53::root::(_lldp_init) Failed to enable
> > LLDP on eth1
> > Traceback (most recent call last):
> >   File
> > "/usr/lib/python2.7/site-packages/vdsm/network/initializer.py",
> > line 51, in _lldp_init Lldp.enable_lldp_on_iface(device)
> >   File
> > "/usr/lib/python2.7/site-packages/vdsm/network/lldp/lldpad.py",
> > line 30, in enable_lldp_on_iface
> > lldptool.enable_lldp_on_iface(iface, rx_only) File
> > "/usr/lib/python2.7/site-packages/vdsm/network/lldpad/lldptool.py",
> > line 46, in enable_lldp_on_iface raise EnableLldpError(rc, out,
> > err, iface) EnableLldpError: (1,
> > "timeout\n'M00000001C3040000000c04eth1000badminStatus0002rx' command
> > timed out.\n", '', 'eth1')
> > MainThread::DEBUG::2017-08-30
> > 05:55:59,477::cmdutils::133::root::(exec_cmd) /usr/sbin/lldptool
> > get-lldp -i eth0 adminStatus (cwd None)
> >
> >
> > </error>  
> 
> The LLDP errors are due to SELinux, to be fixed in CentOS-7.4.1. They
> do not cause supervdsmd to stop, so they are not the reason for vdsm's
> failure to start. Something ELSE is doing this.
> 
> in
> http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/2151/artifact/exported-artifacts/basic-suit-master-el7/test_logs/basic-suite-master/post-002_bootstrap.py/lago-basic-suite-master-host-0/_var_log/messages/*view*/
> we have
> 
> Aug 30 05:55:52 lago-basic-suite-master-host-0 journal: vdsm throttled
> WARN MOM not available.
> Aug 30 05:55:52 lago-basic-suite-master-host-0 journal: vdsm throttled
> WARN MOM not available, KSM stats will be missing.
> Aug 30 05:55:53 lago-basic-suite-master-host-0 systemd: Started
> Session 10 of user root.
> Aug 30 05:55:53 lago-basic-suite-master-host-0 systemd-logind: New
> session 10 of user root.
> Aug 30 05:55:53 lago-basic-suite-master-host-0 systemd: Starting
> Session 10 of user root.
> Aug 30 05:55:53 lago-basic-suite-master-host-0 python: ansible-setup
> Invoked with filter=* gather_subset=['all']
> fact_path=/etc/ansible/facts.d gather_timeout=10
> Aug 30 05:55:54 lago-basic-suite-master-host-0 python: ansible-command
> Invoked with warn=True executable=None _uses_shell=False
> _raw_params=bash -c "rpm -qi vdsm | grep -oE
> 'Version\\s+:\\s+[0-9\\.]+' | awk '{print $3}'" removes=None
> creates=None chdir=None
> Aug 30 05:55:54 lago-basic-suite-master-host-0 python: ansible-systemd
> Invoked with no_block=False name=libvirt-guests enabled=True
> daemon_reload=False state=started user=False masked=None
> Aug 30 05:55:54 lago-basic-suite-master-host-0 systemd: Reloading.
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Cannot add
> dependency job for unit lvm2-lvmetad.socket, ignoring: Unit is masked.
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Stopped MOM
> instance configured for VDSM purposes.
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Stopping
> Virtual Desktop Server Manager...
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Starting
> Suspend Active Libvirt Guests...
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Started
> Suspend Active Libvirt Guests.
> Aug 30 05:55:55 lago-basic-suite-master-host-0 journal: libvirt
> version: 2.0.0, package: 10.el7_3.9 (CentOS BuildSystem
> <http://bugs.centos.org>, 2017-05-25-20:52:28, c1bm.rdu2.centos.org)
> Aug 30 05:55:55 lago-basic-suite-master-host-0 journal: hostname:
> lago-basic-suite-master-host-0.lago.local
> Aug 30 05:55:55 lago-basic-suite-master-host-0 vdsmd_init_common.sh:
> vdsm: Running run_final_hooks
> Aug 30 05:55:55 lago-basic-suite-master-host-0 journal: End of file
> while reading data: Input/output error
> Aug 30 05:55:55 lago-basic-suite-master-host-0 systemd: Stopped
> Virtual Desktop Server Manager.
> 
> suggesting that systemd stopped vdsmd since mom did not start on time.
> We have an extremely ugly two-way dependency between the two services.
> Each depends on the other one. I am guessing that  systemd's grace
> period for such a cycle has expired, and the couple was taken down.
> 
> Does anybody have a guess what could cause such slowlness?

Even if the LLDP errors does not have a negative impact of the
functional behavior of supervdsmd, they have a impact timing behavior
of the initialization of supervdsmd.

I will post a patch today which moves the initialization of LLDP in an
extra thread, to make the initialization of LLDP asynchronly.