://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org
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On 13/08/15 07:54 AM, Kostiantyn Ponomarenko wrote:
Digimer,
Thank you. I will try this out.
One more question. What about directories for those agents, what rules
are here?
Thank you,
Kostya
I'm not entirely sure I understand the question, sorry. What do you mean
by directories
to be done between 1.1.9 and
1.1.12?
Michelle Streeter
You need to upgrade all of the cluster components please. Ideally,
upgrade the whole OS...
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On 23/08/15 04:40 PM, Jorge Fábregas wrote:
On 08/23/2015 02:16 PM, Digimer wrote:
One, this is on-topic, so don't worry. :)
Thanks.
Two, I've never used ocfs2 (allergic to all things Oracle), but clvmd
makes LVM cluster-aware, as you know. So I have no idea why they'd say
that.
I
anyway, so I've already incurred the
complexity costs so hey, why not.
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straight to setting up
pacemaker and not worry about cman/corosync directly.
digimer
On 24/08/15 01:52 PM, Streeter, Michelle N wrote:
If I have a cluster.conf file in /etc/cluster, my cluster will not
start. Pacemaker 1.1.11, Corosync 1.4.7, cman 3.0.12, But if I do not
have a cluster.conf file
the Cluster.conf file and the cib.xml and all the back up
versions and tried again and got the same error.
I googled this error and really got nothing. Any ideas?
As a test, can you create a fresh, new cluster?
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the
duration of the events.
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the need for agents to output the XML
metadata. For now, you should be able to see the format needed by
looking at the metadata output of existing FAs.
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to add, uselessly;
perl! 3
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. *Lots* changed in HA from 6.4 - 6.6.
digimer
On 14/08/15 01:17 PM, Streeter, Michelle N wrote:
I am getting an average failover for nfs of 76s. I have set all the
start and stop settings to 10s but no change. The Web page is instant
but not nfs.
I am running two node cluster on rhel6
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sides by other means.
Alternatively, you might implement such relying directly as
fence_virtd module (backend), possibly reusing some code from the
client side (fence_virt).
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On 25/08/15 04:45 AM, Ulrich Windl wrote:
Digimer li...@alteeve.ca schrieb am 24.08.2015 um 18:20 in Nachricht
55db4453.10...@alteeve.ca:
[...]
Using a pair of nodes with a traditional file system exported by NFS and
made accessible by a floating (virtual) IP address gives you redundancy
ems. Pull all power to a node. This
will cause IPMI to fail, so the fence call will fail. This is why I use
IPMI *and* a pair of switched PDUs (IPMI on one switch, PDUs on another).
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6.3 from local not
> applied to 1.15046.3: current "num_updates" is greater than required
> [...]
>
>
> ps. Sorry if should posted on corosync newsgroup, just the CIB
> synchronization fails, so this group seemed to me the right place.
All of the HA mailing lists are
uot;two_node: 1" in corosync.conf (assuming you're using
> corosync 2). That will allow one node to keep quorum if the other is
> shut down.
>
> ___
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> http://clusterlabs.or
t set‐
> ting, they can be configured in cluster.conf as shown above.
> Cman uses the following default values:
>
>vsftype="none"
> token="1"
> token_retransmits_before_loss_const=&qu
es i see after fencing takes place.
>
> Thanks in advance
> Arjun
>
>
> ___
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> http://clusterlabs.org/mailman/listinfo/users
>
> Project Home: http://www.clusterlabs.org
> Getting
etty sure that DLM was just being informed by clustering, but I
> needed to ask.
>
> Again, thanks.
>
>
> Regards.
> Mark K Vallevand mark.vallev...@unisys.com
> <mailto:mark.vallev...@unisys.com>
> Never try and teach a pig to sing: it's a waste of time, and it
mail and its
> attachments from all computers.
>
>
> -Original Message-
> From: Digimer [mailto:li...@alteeve.ca]
> Sent: Friday, October 16, 2015 11:51 AM
> To: Cluster Labs - All topics related to open-source clustering welcomed
> Subject: Re: [ClusterLabs] Cluster n
On 08/10/15 09:03 PM, TaMen说我挑食 wrote:
> Corosync+Pacemaker error during failover
You need to ask a question if you want us to be able to help you.
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On 29/08/15 02:51 PM, Jorge Fábregas wrote:
On 08/29/2015 02:37 PM, Digimer wrote:
No need for clustered LVM, only the active node should see the PV. When
the passive takes over, after connecting to the PV, it should do a
pvscan - vgscan - lvscan before mounting the FS on the LV.
Keep you
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
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acces
el6.x86_64
cman-3.0.12.1-73.el6.1.x86_64
corosync-1.4.7-2.el6.x86_64
[root@node1 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.7 (Santiago)
I'll post a follow-up if I can sort out how to fix it. My selinux-fu is
weak...
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74): avc: denied { open } for
pid=23611 comm="ssh" name="id_rsa" dev=vda2 ino=1966200
scontext=unconfined_u:system_r:fenced_t:s0
tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=file
type=SYSCALL msg=audit(1441767229.710:9374): arch=c03e syscall=2
success=yes e
ve to update the fencing
> configuration once rather than for every node in the rack.
>
> The syntax accepts either '=' or ':' as the separator for the name/value
> pair, so target="rack:1" would work in the XML as well.
Holy crap that is awesome! :D
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-j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Thu Sep 10 22:12:38 2015
Any help is appreciated!
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On 10/09/15 06:31 PM, Noel Kuntze wrote:
>
> Hello Digimer,
>
> Pro tip: look at the 'multiport' module. You can substantially reduce the
> number of rules with it.
> Right now, I'm scratching my eyes out.
> You can use `ss` or `netstat` to find out where clmvd wants to ph
On 10/09/15 06:54 PM, Noel Kuntze wrote:
>
> Hello Digimer,
>
> I initially assumed you were familiar with ss or netstat and simply
> forgot about them.
> Seems I was wrong.
>
> Check the output of this: `ss -tpn` and `ss -upn`.
> Those commands give you the current o
[3001]: [TOTEM ] ring 0 active with no
faults
Adding;
iptables -I INPUT -p sctp -j ACCEPT
Got it working. Obviously, that needs to be tightened up.
digimer
On 10/09/15 07:01 PM, Digimer wrote:
> On 10/09/15 06:54 PM, Noel Kuntze wrote:
>>
>> Hello Digimer,
>>
>> I
On 14/09/15 07:19 AM, Dejan Muhamedagic wrote:
> Hi Digimer,
>
> On Fri, Sep 04, 2015 at 03:36:09AM -0400, Digimer wrote:
>> Hi all,
>>
>> I hit an issue a little while ago where live-migrating a VM (on the
>> same management network normally used for coros
it that something else triggered the fault
detection. It happened during a long live migration (actually, several
servers back to back), so I *assumed* that was the cause. Given it was a
cut-over weekend though, I made a mental note and went back to work. Bad
choice... I should have snagged
On 14/09/15 04:20 AM, Jan Friesse wrote:
> Digimer napsal(a):
>> Hi all,
>>
>>Starting a new thread from the "Clustered LVM with iptables issue"
>> thread...
>>
>>I've decided to review how I do networking entirely in my cluster. I
>>
On 15/09/15 12:10 PM, Noel Kuntze wrote:
>
> Hello Digimer,
>
>> So what's the final verdict on this? I followed your back and forth, and
>> it sounds like corosync uses 0, so nothing else is to be done?
>
> Missing prioritization itself cannot be the cause of the p
I've created an rhbz:
https://bugzilla.redhat.com/show_bug.cgi?id=1261711
digimer
On 08/09/15 11:04 PM, Digimer wrote:
> ere is my cluster.conf, in case it matters:
>
>
> [root@node1 ~]# cat /etc/cluster/
On 15/09/15 03:20 AM, Jan Friesse wrote:
> Digimer napsal(a):
>> On 14/09/15 04:20 AM, Jan Friesse wrote:
>>> Digimer napsal(a):
>>>> Hi all,
>>>>
>>>> Starting a new thread from the "Clustered LVM with iptables issue"
>>
On 27/09/15 11:02 AM, Alex Crow wrote:
>
>
> On 27/09/15 15:54, Digimer wrote:
>> On 27/09/15 10:40 AM, Alex Crow wrote:
>>> Hi List,
>>>
>>> I'm trying to set up a failover iSCSI storage system for oVirt using a
>>> self-hosted engine. I've se
e-target away from glenrock
> after 100 failures (max=100)
> Sep 27 15:35:59 glenrock pengine[3365]: notice: process_pe_message:
> Calculated Transition 54: /var/lib/pacemaker/pengine/pe-input-537.bz2
> Sep 27 15:35:59 glenrock crmd[3366]: notice: run_graph: Transition 54
> (C
Re: https://github.com/ClusterLabs/resource-agents/pull/629
I'd love to support this in the current gen Anvil!. Would it be hard to
add support to ccs for this?
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efault libvirtd bridge is a NAT'ed bridge, so your VMs would get
IPs in the 192.168.122.0/24 subnet, and the libvirtd bridge would route
them to the outside world. Using the bridge type in the tutorial though,
your VMs would appear to be directly on your network and would get (or
you wo
On 23/09/15 10:23 AM, J. Echter wrote:
> Hi Digimer,
>
> Am 23.09.2015 um 15:38 schrieb Digimer:
>> Hi Juergen,
>>
>>First; This list is deprecated and you should use the Cluster Labs -
>> Users list (which I've cc'ed here).
>
> i already got th
:07:40 node1 corosync[4770]: [TOTEM ] Retransmit List: 252
Sep 24 23:07:40 node1 corosync[4770]: [TOTEM ] Retransmit List: 254
Sep 24 23:07:40 node1 corosync[4770]: [TOTEM ] Retransmit List: 254
Certainly *looks* like a network problem, but I can't see what's
wrong... Any ideas?
Thanks
h such idea too? Got anything to share about this?
>
>
> Thank you
Feasible, sure. Needed? No.
Quorum is nice to have, but if you use a fence delay on a node and tell
corosync to use 'wait_for_all', then you're fine. All the clusters I've
built in the last 5~6 years have been 2-node
all team on how to make this work. SSH
> into the drac works fine, and IPMI over IP is enabled. If anyone has
> ideas on this, they would be greatly appreciated.
You're initiating the connection, so no firewall edits should be needed
(anything returning should be ESTABLISHED/RELATED).
ere another method/configuration for
> fencing DRBD?
>
> Thank you for your advice,
>
> Jason
>
> On 9/20/15, 9:40 PM, "Digimer" <li...@alteeve.ca> wrote:
>
>> On 20/09/15 09:18 PM, Jason Gress wrote:
>>> I had seemed to cause a split brain attempting
On 25/09/15 03:44 AM, Christine Caulfield wrote:
> On 25/09/15 00:09, Digimer wrote:
>> I had a RHEL 6.7, cman + rgmanager cluster that I've built many times
>> before. Oddly, I just hit this error:
>>
>>
>> [root@node2 ~]# /etc/init.d/clvmd start
>>
On 08/12/15 03:13 AM, Lentes, Bernd wrote:
> Digimer wrote:
>
>>>>> Should I install all vm's in one partition or every vm in a seperate
>>>>> partition ? The advantage of one vm per partition is that I don't
>>>>> need a cluster fs, righ
gt;>>
>>>>>> "Lentes, Bernd" <bernd.len...@helmholtz-muenchen.de> schrieb
>>> am
>>>>>> 08.12.2015 um
>>> 09:13 in Nachricht <00a901d13190$5c6db3c0$15491b40$@helmholtz-
>>> muenchen.de>:
>>>> Digimer
On 08/12/15 02:44 AM, Ulrich Windl wrote:
>>>> Digimer <li...@alteeve.ca> schrieb am 07.12.2015 um 22:40 in Nachricht
> <5665fcdc.1030...@alteeve.ca>:
> [...]
>> Node 1 looks up how to fence node 2, sees no delay and fences
>> immediately. Node 2
On 07/12/15 03:27 PM, Lentes, Bernd wrote:
> Digimer wrote:
>>
>> On 07/12/15 12:35 PM, Lentes, Bernd wrote:
>>> Hi,
>>>
>>> i've been asking all around here a while ago. Unfortunately I couldn't
>>> continue to work on my cluster, so I'm still th
with their respective tools.
>
> Thanks in advance.
I don't recommend snapshots, as I mentioned. Focus on your backup
application and create DR VMs if you want to minimize the time to
recovery after a total VM loss is what I recommend.
> B
On 22/12/15 05:31 PM, Ilia Sokolinski wrote:
> Hi,
>
> What are the best practices with respect to using DNS names vs IP addresses
> in pacemaker/corosync configuration?
>
> Thanks
>
> Ilia Sokolinski
I use `uname -n` and have the hostname resolve via /etc/ho
On 04/06/16 01:27 PM, Dmitri Maziuk wrote:
> On 2016-06-04 01:10, Digimer wrote:
>
>> We're running postfix/dovecot/postgres for our mail on an HA cluster,
>> but we put it all in a set of VMs and made the VMs HA on DRBD.
>
> Hmm. I deliver to ~/Maildir and /home
are always seen on all nodes right away.
What you do on the LVs is up to you. If boot a VM on node 1 using an LV
as backing storage, nothing in LVM stopping you from accessing that LV
on another node and destroying your data.
For that, you need pacemaker or something else smart enough and cl
ster aware... If you
mount it on two nodes, you will almost certainly corrupt the FS quickly.
If you want to mount an LV on two+ nodes at once, you need a
cluster-aware file system, life GFS2.
> Thanks in advance.
>
>
> Bernd
>
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for our mail on an HA cluster,
but we put it all in a set of VMs and made the VMs HA on DRBD. We go
this route because one setup can be adapted to just about any
application. This also allows migrations without interruptions.
Didn't answer you question, but maybe an alternate approach to consider
ceed to shoot node 1 and then recover any
resources that had been on node 1.
digimer
> However, there are more things for me to read and more experiments
> for me to try so I'm good for now.
>
> Thanks to everyone for the prompt help.
>
> j.
>
> On Tue, May 31,
+rgmanager" for "pacemaker",
adjust the actual commands and the rest of the guide works fine.
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. Whether you're using
a shared IP, shared storage or something else, it's all the same to
pacemaker in the end.
> On Tue, Jun 21, 2016 at 8:27 PM, Dmitri Maziuk <dmitri.maz...@gmail.com
> <mailto:dmitri.maz...@gmail.com>> wrote:
>
> On 2016-06-20 17:19, Digimer wro
ct (resource cleanup is a node unfence)...
>> Honestly, this potentially leads to a data corruption...
>>
>> Also (probably not related) there was one more resource stop failure (in
>> that case - timeout) prior to failed stop mentioned above. And that stop
>> timeout di
On 21/06/16 10:57 AM, Dmitri Maziuk wrote:
> On 2016-06-20 17:19, Digimer wrote:
>
>> Nikhil indicated that they could switch where traffic went up-stream
>> without issue, if I understood properly.
>
> They have some interesting setup, but that notwithstanding: if sp
sources mode. If I wanted to run it so that when it breaks I get to
> keep the pieces, I could.
You technically can in pacemaker, too, but it's dumb in any HA
environment. As soon as you make assumptions, you open up the chance of
being wrong.
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;. I'd be shocked if there wasn't
a version of this in pacemaker already, given that it has for more
flexibility than rgmanager.
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isable stonith, so ya, not a great resource.
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andby.
>
> Does Pacemaker make it easy to do this kind of thing through some means?
> Are there any issues that I am completely unaware due to letting
> split-brain occur?
>
> -Thanks
> Nikhil
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What if the cure for can
AM, Lentes, Bernd wrote:
> Hi,
>
> is it possible to have a DLM running without CRM ? Just for playing around a
> bit and get used to some stuff.
>
>
> Bernd
>
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sense. What you want
to do is alert an admin that a restart was needed, so that he or she can
investigate the cause. Pacemaker 1.1.15 allows for this alerting now.
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he release includes many bugfixes and minor enhancements. For
> a more detailed list of changes, see the change log:
>
> https://github.com/ClusterLabs/pacemaker/blob/1.1/ChangeLog
>
> Feedback is invited and welcome.
>
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On 10/02/16 02:40 AM, Ulrich Windl wrote:
>>>> Digimer <li...@alteeve.ca> schrieb am 08.02.2016 um 20:03 in Nachricht
> <56b8e68a.1060...@alteeve.ca>:
>> On 08/02/16 01:56 PM, Ferenc Wágner wrote:
>>> Ken Gaillot <kgail...@redhat.com> write
wondering; Was it someone from here maybe? It's definitely
something meant for me so I was wondering if someone I've helped found
my address...
A mystery!
If it was, thanks to whoever sent it. It it wasn't anyone here, then
sorry for the line noise. :)
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node with clvmd/gfs2 is no different than normal
cluster fencing. To be clear, DLM does NOT fence, it simply waits for
the cluster to fence. So you can use IPMI, switched PDUs or whatever
else is available in your environment.
> On Mon, Feb 8, 2016 at 2:03 PM, Digimer <li...@alteeve.ca
>
On 11/02/16 02:37 AM, Ulrich Windl wrote:
>>>> Digimer <li...@alteeve.ca> schrieb am 10.02.2016 um 17:32 in Nachricht
> <56bb6637.6090...@alteeve.ca>:
>> On 10/02/16 02:40 AM, Ulrich Windl wrote:
>
> [...]
>>>> If fencing fails or is not con
On 11/02/16 04:42 AM, Vladislav Bogdanov wrote:
> 10.02.2016 19:32, Digimer wrote:
> [snip]
>>
>> To be clear; DLM does NOT have it's own fencing. It relies on the
>> cluster's fencing.
>>
>
> Actually, dlm4 can use fence-agents directly (device keywo
gt; ___
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> http://clusterlabs.org/mailman/listinfo/users
>
> Project Home: http://www.clusterlabs.org
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> Bugs: http://b
us. :)
If anyone has any comments or concerns about us moving our project
discussion to this list, please let me know and I'll do what I can to
make sure we address those concerns.
Cheers!
digimer
1. https://alteeve.ca/w/AN!Cluster_Tutorial_2
2. https://github.com/digimer/striker
3. https:
opensuse.org/repositories/network:/ha-clustering:/Stable/
>
> If you don't know what booth is and what is it good for, please
> check the README at the bottom of the git repository home page:
>
> https://github.com/ClusterLabs/booth
>
> Cheers,
>
> Dejan
Hey hey, con
nith
>proxy) and leaving fencing fully to the resource manager (Pacemaker)
Pacemaker's fencing will inform DLM when the node has been terminated.
If EL6-based clusters, this is done via 'fence_pcmk' config in cman's
cluster.conf (which simply asks pacemaker to do the fence and report
back when succ
On 16/03/16 04:04 PM, Christopher Harvey wrote:
> On Wed, Mar 16, 2016, at 04:00 PM, Digimer wrote:
>> On 16/03/16 03:59 PM, Christopher Harvey wrote:
>>> I am able to create a split brain situation in corosync 1.1.13 using
>>> iptables in a 3 node cluster.
>>>
Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
>
>
>
> _______
> Users mailing list: Users@clusterlabs.org
h (the former being ideal for
production, the later being easier to setup but more fragile, so only
good for testing).
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o, please share the log files from the
surviving node starting just before you crashed the node until a few
minutes after.
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t;
> 5402/udp closedunknown
>
> 5403/udp closedunknown
>
> 5404/udp closedunknown
>
> *5405/udp open|filtered unknown*
>
> MAC Address: 12:34:56:78:9A:BC (Unknown)
>
>
>
> Service detection performed. Please report any i
mr 3 from the rest of the cluster and everything fails over normally,
> so only a unidirectional failure causes problems.
>
> I don't have stonith enabled right now, and looking over the
> pacemaker.log file closely to see if 4 and 5 would normally have fenced
> 3, but I didn't see any
On 19/03/16 10:10 AM, Dennis Jacobfeuerborn wrote:
> On 18.03.2016 00:50, Digimer wrote:
>> On 17/03/16 07:30 PM, Christopher Harvey wrote:
>>> On Thu, Mar 17, 2016, at 06:24 PM, Ken Gaillot wrote:
>>>> On 03/17/2016 05:10 PM, Christopher Harvey wrote:
>>&
The resource manager, pacemaker or rgmanager, care about resources, so
it is what cares about making smart decisions. As Ken pointed out,
without fencing, it can never tell the difference between no access and
dead peer.
This is (again) why fencing is critical.
--
Digimer
Papers and Projects: h
aster (score:INFINITY) (with-rsc-role:Master)
> (id:colocation-drbd_fs-drbd_master-INFINITY)
>
> Resources Defaults:
> resource-stickiness: 100
> failure-timeout: 60
> Operations Defaults:
> No defaults set
>
> Cluster Properties:
> cluster-infrastructure: c
.redhat.com
Congratulations!
An auspicious day to release, if any. ;)
--
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?
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On 19/01/16 08:04 PM, Jan Pokorný wrote:
> On 11/01/16 11:59 -0500, Digimer wrote:
>> We hit a strange problem where a RAID controller on a node failed,
>> causing DLM (gfs2/clvmd) to hang, but the node was never fenced. I
>> assume this was because coros
l:service_failover):Stopped
>
> Failcounts for dmz1
> ha-d1.dev.com: 4
> ha-d2.dev.com: 4
>
> Is there any way to automatically recover from this scenario, other than
> setting an obnoxiously high migration-threshold?
>
> --
>
> *Sam Gardner *
>
>
On 13/04/16 10:16 AM, Ken Gaillot wrote:
> On 04/12/2016 06:39 PM, Digimer wrote:
>> On 12/04/16 07:09 PM, Ken Gaillot wrote:
>>> Hi everybody,
>>>
>>> The upcoming OpenStack Summit is April 25-29 in Austin, Texas (US). Some
>>> regular ClusterLa
f mail (and when I say a lot I mean a LOT).
>
> Bye,
With stonith enabled, a failed fence will leave the cluster hung, by
design. The logic is that, as bad as a hung cluster is, it is better
than risking a split-brain (which can lead to data loss / corruption,
confused switches, etc).
digim
tic failover permanently while still
> allowing manual failover (with "pcs resource move" or with something else)?
Setting aside the use-case for this...
Ditch the HA stack, it's an avoidable complexity. Instead, just write a
small shell script that drops the IP, stops nfs, unmounts th
ntOS 5, use cman + rgmanager. If you want to use pacemaker, use CentOS
7 (or at the very least, the lastest 6 with the cman plugin).
--
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
acc
ago, so it is available.
If I am assuming that you're asking about the Pacemaker project, yes it
is also up to date and very actively supported and developed.
The projects under the Clusterlabs umbrella are all available here:
https://github.com/ClusterLabs
--
Digimer
Papers and Projects: ht
nd forth but that is someone more complicated.
--
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?
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