12:55 p.m.
Hi all,
I'm testing ovirt+glusterfs with only two node for all (engine,
glusterfs, hypervisors), on centos 6.5 hosts following guide at:
http://community.redhat.com/blog/2013/09/up-and-running-with-ovirt-3-3/
http://www.gluster.org/2013/09/ovirt-3-3-glusterized/
but with some change like setting on glusterfs, parameter
cluster.server-quorum-ratio to 50% (due to prevent glusterfs to go down
if one node goes done) and option on /etc/glusterfs/glusterd.vol "option
base-port 50152" (due to libvirt port conflict).
So, with the above parameter I was able to stop/reboot node not used to
directly mount glusterfs (eg lovhm002), but when I stop/reboot node,
that is used to mount glusterfs (eg node lovhm001), all data center goes
done, especially when I stop service glusterfsd (not glusterd
service!!!), but the glusterfs still alive and is reachable on node
lovhm002 that survives but ovirt/libvirt marks DC/storage in error.
Do you have any ideas to configure DC/Cluster on ovirt that remains
aware if node used to mount glusterfs goes down?
This is a sample vdsmd.log on node that remains on-line (lovhm002) when
I stopped services glusterd and glusterfsd node lovhm001:
Thread-294::DEBUG::2014-01-05
19:12:32,475::task::1168::TaskManager.Task::(prepare)
Task=`a003cde0-a11a-489e-94c2-611f3d096a81`::finished: {'info':
{'spm_id': 2, 'master_uuid':
'85ad5f7d-3b67-4618-a871-f9ec886020a4',
'name': 'PROD', 'version': '3', 'domains':
'85ad5f7d-3b67-4618-a871-f9ec886020a4:Active,6a9b4fa6-f393-4036-bd4e-0bc9dccb1594:Active',
'pool_status': 'connected', 'isoprefix':
'/rhev/data-center/mnt/lovhm001.fabber.it:_var_lib_exports_iso/6a9b4fa6-f393-4036-bd4e-0bc9dccb1594/images/11111111-1111-1111-1111-111111111111',
'type': 'GLUSTERFS', 'master_ver': 2, 'lver': 3},
'dominfo':
{'85ad5f7d-3b67-4618-a871-f9ec886020a4': {'status': 'Active',
'diskfree': '374350675968', 'alerts': [], 'version': 3,
'disktotal':
'375626137600'}, '6a9b4fa6-f393-4036-bd4e-0bc9dccb1594':
{'status':
'Active', 'diskfree': '45249200128', 'alerts': [],
'version': 0,
'disktotal': '51604619264'}}}
Thread-294::DEBUG::2014-01-05
19:12:32,476::task::579::TaskManager.Task::(_updateState)
Task=`a003cde0-a11a-489e-94c2-611f3d096a81`::moving from state preparing
-> state finished
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::939::ResourceManager.Owner::(releaseAll)
Owner.releaseAll requests {} resources
{'Storage.2eceb484-73e0-464a-965b-69f067918080': < ResourceRef
'Storage.2eceb484-73e0-464a-965b-69f067918080', isValid: 'True' obj:
'None'>}
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::976::ResourceManager.Owner::(cancelAll)
Owner.cancelAll requests {}
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::615::ResourceManager::(releaseResource)
Trying to release resource 'Storage.2eceb484-73e0-464a-965b-69f067918080'
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::634::ResourceManager::(releaseResource)
Released resource 'Storage.2eceb484-73e0-464a-965b-69f067918080' (0
active users)
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::640::ResourceManager::(releaseResource)
Resource 'Storage.2eceb484-73e0-464a-965b-69f067918080' is free, finding
out if anyone is waiting for it.
Thread-294::DEBUG::2014-01-05
19:12:32,476::resourceManager::648::ResourceManager::(releaseResource)
No one is waiting for resource
'Storage.2eceb484-73e0-464a-965b-69f067918080', Clearing records.
Thread-294::DEBUG::2014-01-05
19:12:32,476::task::974::TaskManager.Task::(_decref)
Task=`a003cde0-a11a-489e-94c2-611f3d096a81`::ref 0 aborting False
Thread-296::DEBUG::2014-01-05
19:12:36,070::BindingXMLRPC::974::vds::(wrapper) client
[5.39.66.85]::call volumesList with () {} flowID [76f294ea]
Thread-296::DEBUG::2014-01-05
19:12:36,079::BindingXMLRPC::981::vds::(wrapper) return volumesList with
{'status': {'message': 'Done', 'code': 0},
'volumes': {'vmdata':
{'transportType': ['TCP'], 'uuid':
'e9b05f7a-f392-44f3-9d44-04761c36437d', 'bricks':
['lovhm001.fabber.it:/vmdata', 'lovhm002.fabber.it:/vmdata'],
'volumeName': 'vmdata', 'volumeType': 'REPLICATE',
'replicaCount': '2',
'brickCount': '2', 'distCount': '2',
'volumeStatus': 'ONLINE',
'stripeCount': '1', 'options':
{'cluster.server-quorum-type': 'server',
'cluster.eager-lock': 'enable', 'performance.stat-prefetch':
'off',
'auth.allow': '*', 'cluster.quorum-type': 'auto',
'performance.quick-read': 'off', 'network.remote-dio':
'enable',
'nfs.disable': 'on', 'performance.io-cache': 'off',
'server.allow-insecure': 'on', 'storage.owner-uid': '36',
'user.cifs':
'disable', 'performance.read-ahead': 'off',
'storage.owner-gid': '36',
'cluster.server-quorum-ratio': '50%'}}}}
libvirtEventLoop::INFO::2014-01-05
19:12:38,856::vm::4266::vm.Vm::(_onAbnormalStop)
vmId=`88997598-1db3-478a-bbe2-a7d234cfdc77`::abnormal vm stop device
virtio-disk0 error eother
libvirtEventLoop::DEBUG::2014-01-05
19:12:38,856::vm::4840::vm.Vm::(_onLibvirtLifecycleEvent)
vmId=`88997598-1db3-478a-bbe2-a7d234cfdc77`::event Suspended detail 2
opaque None
Thread-28::DEBUG::2014-01-05
19:12:40,996::fileSD::239::Storage.Misc.excCmd::(getReadDelay) '/bin/dd
iflag=direct
if=/rhev/data-center/mnt/lovhm001.fabber.it:_var_lib_exports_iso/6a9b4fa6-f393-4036-bd4e-0bc9dccb1594/dom_md/metadata
bs=4096 count=1' (cwd None)
Thread-28::DEBUG::2014-01-05
19:12:41,001::fileSD::239::Storage.Misc.excCmd::(getReadDelay) SUCCESS:
<err> = '0+1 records in\n0+1 records out\n361 bytes (361 B) copied,
0.00017524 s, 2.1 MB/s\n'; <rc> = 0
Thread-298::DEBUG::2014-01-05
19:12:41,088::BindingXMLRPC::974::vds::(wrapper) client
[5.39.66.85]::call volumesList with () {}
Thread-298::DEBUG::2014-01-05
19:12:41,097::BindingXMLRPC::981::vds::(wrapper) return volumesList with
{'status': {'message': 'Done', 'code': 0},
'volumes': {'vmdata':
{'transportType': ['TCP'], 'uuid':
'e9b05f7a-f392-44f3-9d44-04761c36437d', 'bricks':
['lovhm001.fabber.it:/vmdata', 'lovhm002.fabber.it:/vmdata'],
'volumeName': 'vmdata', 'volumeType': 'REPLICATE',
'replicaCount': '2',
'brickCount': '2', 'distCount': '2',
'volumeStatus': 'ONLINE',
'stripeCount': '1', 'options':
{'cluster.server-quorum-type': 'server',
'cluster.eager-lock': 'enable', 'performance.stat-prefetch':
'off',
'auth.allow': '*', 'cluster.quorum-type': 'auto',
'performance.quick-read': 'off', 'network.remote-dio':
'enable',
'nfs.disable': 'on', 'performance.io-cache': 'off',
'server.allow-insecure': 'on', 'storage.owner-uid': '36',
'user.cifs':
'disable', 'performance.read-ahead': 'off',
'storage.owner-gid': '36',
'cluster.server-quorum-ratio': '50%'}}}}
Thread-300::DEBUG::2014-01-05
19:12:41,345::task::579::TaskManager.Task::(_updateState)
Task=`d049a71c-70a4-4dc2-9d69-99f1561ab405`::moving from state init ->
state preparing
Thread-300::INFO::2014-01-05
19:12:41,345::logUtils::44::dispatcher::(wrapper) Run and protect:
repoStats(options=None)
Thread-300::INFO::2014-01-05
19:12:41,345::logUtils::47::dispatcher::(wrapper) Run and protect:
repoStats, Return response: {'85ad5f7d-3b67-4618-a871-f9ec886020a4':
{'delay': '0.000370968', 'lastCheck': '8.9',
'code': 0, 'valid': True,
'version': 3}, '6a9b4fa6-f393-4036-bd4e-0bc9dccb1594': {'delay':
'0.00017524', 'lastCheck': '0.3', 'code': 0,
'valid': True, 'version': 0}}
Thread-300::DEBUG::2014-01-05
19:12:41,346::task::1168::TaskManager.Task::(prepare)
Task=`d049a71c-70a4-4dc2-9d69-99f1561ab405`::finished:
{'85ad5f7d-3b67-4618-a871-f9ec886020a4': {'delay': '0.000370968',
'lastCheck': '8.9', 'code': 0, 'valid': True,
'version': 3},
'6a9b4fa6-f393-4036-bd4e-0bc9dccb1594': {'delay': '0.00017524',
'lastCheck': '0.3', 'code': 0, 'valid': True,
'version': 0}}
Thread-300::DEBUG::2014-01-05
19:12:41,346::task::579::TaskManager.Task::(_updateState)
Task=`d049a71c-70a4-4dc2-9d69-99f1561ab405`::moving from state preparing
-> state finished
Thread-300::DEBUG::2014-01-05
19:12:41,346::resourceManager::939::ResourceManager.Owner::(releaseAll)
Owner.releaseAll requests {} resources {}
Thread-300::DEBUG::2014-01-05
19:12:41,346::resourceManager::976::ResourceManager.Owner::(cancelAll)
Owner.cancelAll requests {}
Thread-300::DEBUG::2014-01-05
19:12:41,346::task::974::TaskManager.Task::(_decref)
Task=`d049a71c-70a4-4dc2-9d69-99f1561ab405`::ref 0 aborting False
Thread-27::DEBUG::2014-01-05
19:12:42,459::fileSD::239::Storage.Misc.excCmd::(getReadDelay) '/bin/dd
iflag=direct
if=/rhev/data-center/mnt/glusterSD/lovhm001:_vmdata/85ad5f7d-3b67-4618-a871-f9ec886020a4/dom_md/metadata
bs=4096 count=1' (cwd None)
Thread-27::DEBUG::2014-01-05
19:12:42,464::fileSD::239::Storage.Misc.excCmd::(getReadDelay) SUCCESS:
<err> = '0+1 records in\n0+1 records out\n495 bytes (495 B) copied,
0.000345681 s, 1.4 MB/s\n'; <rc> = 0
Thread-302::DEBUG::2014-01-05
19:12:42,484::BindingXMLRPC::177::vds::(wrapper) client [5.39.66.85]
Thread-302::DEBUG::2014-01-05
19:12:42,485::task::579::TaskManager.Task::(_updateState)
Task=`acd727ae-dcbf-4662-bd97-fbdbadf6968a`::moving from state init ->
state preparing
Thread-302::INFO::2014-01-05
19:12:42,485::logUtils::44::dispatcher::(wrapper) Run and protect:
getSpmStatus(spUUID='2eceb484-73e0-464a-965b-69f067918080', options=None)
Thread-302::INFO::2014-01-05
19:12:42,485::logUtils::47::dispatcher::(wrapper) Run and protect:
getSpmStatus, Return response: {'spm_st': {'spmId': 2,
'spmStatus':
'SPM', 'spmLver': 3}}
thanks in advance
a
--
Amedeo Salvati
RHC{DS,E,VA} - LPIC-3 - UCP - NCLA 11
m. +39 333 1264484
email: amedeo(a)oscert.net
email: amedeo(a)linux.com
http://plugcomputing.it/redhatcert.php
http://plugcomputing.it/lpicert.php
3:44 a.m.
Adding gluster-users.
On 01/06/2014 12:25 AM, Amedeo Salvati wrote:
Hi all,
I'm testing ovirt+glusterfs with only two node for all (engine,
glusterfs, hypervisors), on centos 6.5 hosts following guide at:
http://community.redhat.com/blog/2013/09/up-and-running-with-ovirt-3-3/
http://www.gluster.org/2013/09/ovirt-3-3-glusterized/
but with some change like setting on glusterfs, parameter
cluster.server-quorum-ratio to 50% (due to prevent glusterfs to go down
if one node goes done) and option on /etc/glusterfs/glusterd.vol "option
base-port 50152" (due to libvirt port conflict).
So, with the above parameter I was able to stop/reboot node not used to
directly mount glusterfs (eg lovhm002), but when I stop/reboot node,
that is used to mount glusterfs (eg node lovhm001), all data center goes
done, especially when I stop service glusterfsd (not glusterd
service!!!), but the glusterfs still alive and is reachable on node
lovhm002 that survives but ovirt/libvirt marks DC/storage in error.
Do you have any ideas to configure DC/Cluster on ovirt that remains
aware if node used to mount glusterfs goes down?
This seems to be due to client quorum in glusterfs. It can be observed
that client quorum is on since option cluster.quorum-type has been set
to value "auto".
client quorum gets enabled by default as part of "Optimize for Virt"
action in oVirt or by enabling "volume set group virt" in gluster CLI.
client quorum gets enabled by default to provide additional protection
against split-brains. In case of a gluster volume with replica count >
2, client quorum returns an error if writes/updates fail in more than
50% of the bricks. However, when the replica count happens to be 2,
updates are failed if the first server/glusterfsd is not online.
If the chances of a network partition and a split brain is not
significant in your setup, you can turn off client quorum by setting
option cluster.quorum-type to value "none".
Regards,
Vijay
9 a.m.
Il 06/01/2014 10:44, Vijay Bellur ha scritto:
Adding gluster-users.
On 01/06/2014 12:25 AM, Amedeo Salvati wrote:
> Hi all,
>
> I'm testing ovirt+glusterfs with only two node for all (engine,
> glusterfs, hypervisors), on centos 6.5 hosts following guide at:
>
> http://community.redhat.com/blog/2013/09/up-and-running-with-ovirt-3-3/
> http://www.gluster.org/2013/09/ovirt-3-3-glusterized/
>
> but with some change like setting on glusterfs, parameter
> cluster.server-quorum-ratio to 50% (due to prevent glusterfs to go down
> if one node goes done) and option on /etc/glusterfs/glusterd.vol "option
> base-port 50152" (due to libvirt port conflict).
>
> So, with the above parameter I was able to stop/reboot node not used to
> directly mount glusterfs (eg lovhm002), but when I stop/reboot node,
> that is used to mount glusterfs (eg node lovhm001), all data center goes
> done, especially when I stop service glusterfsd (not glusterd
> service!!!), but the glusterfs still alive and is reachable on node
> lovhm002 that survives but ovirt/libvirt marks DC/storage in error.
>
> Do you have any ideas to configure DC/Cluster on ovirt that remains
> aware if node used to mount glusterfs goes down?
This seems to be due to client quorum in glusterfs. It can be observed
that client quorum is on since option cluster.quorum-type has been set
to value "auto".
client quorum gets enabled by default as part of "Optimize for Virt"
action in oVirt or by enabling "volume set group virt" in gluster CLI.
client quorum gets enabled by default to provide additional protection
against split-brains. In case of a gluster volume with replica count >
2, client quorum returns an error if writes/updates fail in more than
50% of the bricks. However, when the replica count happens to be 2,
updates are failed if the first server/glusterfsd is not online.
If the chances of a network partition and a split brain is not
significant in your setup, you can turn off client quorum by setting
option cluster.quorum-type to value "none".
yea!
setting quorum-type to none has solved the issue... now I'm able to have
a two node ovirt/gluster DC aware of faulting one node, except for
engine portal that at this moment resides on only one node (sigh :-( )
I'm waiting for self hosted engine)
thanks1k
a
Regards,
Vijay
--
Amedeo Salvati
RHC{DS,E,VA} - LPIC-3 - UCP - NCLA 11
email: amedeo(a)oscert.net
email: amedeo(a)linux.com
http://plugcomputing.it/redhatcert.php
http://plugcomputing.it/lpicert.php
3770
days inactive
3771
days old
2 comments
2 participants
participants (2)
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Amedeo Salvati -
Vijay Bellur