On 5 Aug 2015, at 1:34 am, Joshua Harlow harlo...@outlook.com wrote:
Philipp Marek wrote:
If we end up using a DLM then we have to detect when the connection to
the DLM is lost on a node and stop all ongoing operations to prevent
data corruption.
It may not be trivial to do, but we will
On Tue, Aug 4, 2015 at 7:47 PM, Morgan Fainberg
morgan.fainb...@gmail.com wrote:
On Tue, Aug 4, 2015 at 1:43 AM, Gorka Eguileor gegui...@redhat.com wrote:
On Tue, Aug 04, 2015 at 05:47:44AM +1000, Morgan Fainberg wrote:
On Aug 4, 2015, at 01:42, Fox, Kevin M kevin@pnnl.gov wrote:
On 04/08/15 23:39 -0700, Mike Perez wrote:
On Tue, Aug 4, 2015 at 7:47 PM, Morgan Fainberg
morgan.fainb...@gmail.com wrote:
On Tue, Aug 4, 2015 at 1:43 AM, Gorka Eguileor gegui...@redhat.com wrote:
On Tue, Aug 04, 2015 at 05:47:44AM +1000, Morgan Fainberg wrote:
On Aug 4, 2015, at 01:42,
Well, is it already decided that Pacemaker would be chosen to provide HA in
Openstack? There's been a talk Pacemaker: the PID 1 of Openstack IIRC.
I know that Pacemaker's been pushed aside in an earlier ML post, but IMO
there's already *so much* been done for HA in Pacemaker that Openstack
On Tue, Aug 04, 2015 at 08:30:17AM -0700, Joshua Harlow wrote:
Duncan Thomas wrote:
On 3 August 2015 at 20:53, Clint Byrum cl...@fewbar.com
mailto:cl...@fewbar.com wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03
08:53:21 -0700:
Also on a side note, I think
On Tue, Aug 04, 2015 at 08:40:13AM -0700, Joshua Harlow wrote:
Clint Byrum wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21 -0700:
On Mon, Aug 3, 2015 at 8:41 AM Joshua Harlowharlo...@outlook.com wrote:
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message
On 2015-08-05 09:10:30 +0200 (+0200), Philipp Marek wrote:
[...]
Pacemaker is *the* Linux HA Stack.
[...]
Can you expand on this assertion? It doesn't look to me like it's
part of the Linux source tree and I see strong evidence to suggest
it's released and distributed completely separately from
[...]
Pacemaker is *the* Linux HA Stack.
[...]
Can you expand on this assertion? It doesn't look to me like it's
part of the Linux source tree and I see strong evidence to suggest
it's released and distributed completely separately from the kernel.
If you read Linux as GNU/Linux or Linux
On 17:03 Aug 05, Flavio Percoco wrote:
snip
That said, you may want to sync with Joshua since he's going to work
on a cross-project spec as well (as he mentioned in the other
thread).[0]
http://lists.openstack.org/pipermail/openstack-dev/2015-August/071441.html
--
Mike Perez
On 2015-08-05 14:36:37 +0200 (+0200), Philipp Marek wrote:
[...]
Pacemaker is *the* Linux HA Stack.
[...]
Can you expand on this assertion? It doesn't look to me like it's
part of the Linux source tree and I see strong evidence to suggest
it's released and distributed completely
[...]
Pacemaker is *the* Linux HA Stack.
[...]
Can you expand on this assertion? It doesn't look to me like it's
part of the Linux source tree and I see strong evidence to suggest
it's released and distributed completely separately from the kernel.
If you read Linux as
On 2015-08-05 15:31:03 +0200 (+0200), Philipp Marek wrote:
[...]
Pacemaker is *the* Linux HA Stack.
[...]
Can you expand on this assertion? It doesn't look to me like it's
part of the Linux source tree and I see strong evidence to suggest
it's released and distributed
Well, SUSE and Redhat (7) use Pacemaker by default, Debian/Ubuntu have it
(along with others)...
That gives it quite some market share, wouldn't you think?
Yes, I guess the most popular meaning is a good match here.
I see, so in the same way that nano is *the* Linux text editor
On 2015-08-05 15:48:52 +0200 (+0200), Philipp Marek wrote:
[...]
How many cluster stack alternatives can you see in SUSE?
How many cluster stack alternatives are available in _every_ major
distribution?
I think it depends a lot on how you define cluster stack and
whether the solution to the
Excerpts from Philipp Marek's message of 2015-08-05 00:10:30 -0700:
Well, is it already decided that Pacemaker would be chosen to provide HA in
Openstack? There's been a talk Pacemaker: the PID 1 of Openstack IIRC.
I know that Pacemaker's been pushed aside in an earlier ML post, but IMO
On 3 August 2015 at 20:53, Clint Byrum cl...@fewbar.com wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21
-0700:
Also on a side note, I think Cinder's need for this is really subtle,
and one could just accept that sometimes it's going to break when it does
two
On 04/08/15 10:50 +0200, Philipp Marek wrote:
If we end up using a DLM then we have to detect when the connection to
the DLM is lost on a node and stop all ongoing operations to prevent
data corruption.
It may not be trivial to do, but we will have to do it in any solution
we use, even on my
On Tue, Aug 04, 2015 at 10:32:40AM +0300, Duncan Thomas wrote:
On 3 August 2015 at 20:53, Clint Byrum cl...@fewbar.com wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21
-0700:
Also on a side note, I think Cinder's need for this is really subtle,
and one could
...@redhat.com]
Sent: Monday, August 03, 2015 1:43 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco
on this thread.
Cheers,
Gorka.
Thanks,
Kevin
From: Gorka Eguileor
Sent: Tuesday, August 04, 2015 1:39:07 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA Active-Active
On Mon
...@redhat.com]
Sent: Monday, August 03, 2015 10:48 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 03:42:48PM +, Fox, Kevin M wrote:
I'm usually for abstraction
If we end up using a DLM then we have to detect when the connection to
the DLM is lost on a node and stop all ongoing operations to prevent
data corruption.
It may not be trivial to do, but we will have to do it in any solution
we use, even on my last proposal that only uses the DB in
: [openstack-dev] [Cinder] A possible solution for HA Active-Active
On Mon, Aug 03, 2015 at 06:12:23PM +, Fox, Kevin M wrote:
For example, to parallel the conversation with databases:
We want a database. Well, that means mongodb, postgres, mysql, berkeleydb,
etc
Oh, well, I need
Duncan Thomas wrote:
On 3 August 2015 at 20:53, Clint Byrum cl...@fewbar.com
mailto:cl...@fewbar.com wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03
08:53:21 -0700:
Also on a side note, I think Cinder's need for this is really subtle,
and one could just
Philipp Marek wrote:
If we end up using a DLM then we have to detect when the connection to
the DLM is lost on a node and stop all ongoing operations to prevent
data corruption.
It may not be trivial to do, but we will have to do it in any solution
we use, even on my last proposal that only
Clint Byrum wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21 -0700:
On Mon, Aug 3, 2015 at 8:41 AM Joshua Harlowharlo...@outlook.com wrote:
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM
specifics on this thread.
Cheers,
Gorka.
Thanks,
Kevin
From: Gorka Eguileor
Sent: Tuesday, August 04, 2015 1:39:07 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA Active
Excerpts from Duncan Thomas's message of 2015-08-04 00:32:40 -0700:
On 3 August 2015 at 20:53, Clint Byrum cl...@fewbar.com wrote:
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21
-0700:
Also on a side note, I think Cinder's need for this is really subtle,
and one
, August 03, 2015 1:43 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize
Morgan Fainberg wrote:
Lets step back away from tooz. Tooz for the sake of this conversation is as
much the same as saying zookeeper or consul or etcd, etc. We should be focused
(as both Flavio and Thierry said) on if we need DLM and what it will solve.
So IMHO part of the problem with just
+1.
From: Flavio Percoco [fla...@redhat.com]
Sent: Monday, August 03, 2015 12:30 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On 03/08/15 00:49
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileorgegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in
: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind this. But, as others have
mentioned, I'd like us to take a step back, run
On Mon, Aug 3, 2015 at 8:41 AM Joshua Harlow harlo...@outlook.com wrote:
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileorgegui...@redhat.com
Devananda van der Veen wrote:
On Mon, Aug 3, 2015 at 8:41 AM Joshua Harlow harlo...@outlook.com
mailto:harlo...@outlook.com wrote:
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez
On 03/08/15 08:32 -0700, Joshua Harlow wrote:
Morgan Fainberg wrote:
Lets step back away from tooz. Tooz for the sake of this conversation is as
much the same as saying zookeeper or consul or etcd, etc. We should be focused
(as both Flavio and Thierry said) on if we need DLM and what it will
On Mon, Aug 03, 2015 at 12:28:27AM -0700, Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com
wrote:
I know we've all
On 03/08/15 00:49 +0200, Gorka Eguileor wrote:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out
Lets step back away from tooz. Tooz for the sake of this conversation is as
much the same as saying zookeeper or consul or etcd, etc. We should be focused
(as both Flavio and Thierry said) on if we need DLM and what it will solve.
Once we have all of that defined, the use of an abstraction such
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com
wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and
On Fri, Jul 31, 2015 at 03:18:39PM -0700, Clint Byrum wrote:
Excerpts from Mike Perez's message of 2015-07-31 10:40:04 -0700:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow harlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind this. But, as others have
mentioned, I'd like us to take a step back, run this accross teams and
come up with an opinonated solution that would work for everyone.
Starting this discussion now would allow us to prepare
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind this. But, as others have
mentioned, I'd like us to take a step back, run this accross teams and
come up with an opinonated solution that would work for
On Mon, Aug 03 2015, Thierry Carrez wrote:
The last thing we want is to rush a solution that would only solve a
particular project use case. Personally I'd like us to pick the simplest
solution that can solve most of the use cases. Each of the solutions
bring something to the table --
Excerpts from Devananda van der Veen's message of 2015-08-03 08:53:21 -0700:
On Mon, Aug 3, 2015 at 8:41 AM Joshua Harlow harlo...@outlook.com wrote:
Clint Byrum wrote:
Excerpts from Gorka Eguileor's message of 2015-08-02 15:49:46 -0700:
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike
On Mon, Aug 03, 2015 at 07:01:45PM +1000, Morgan Fainberg wrote:
Lets step back away from tooz. Tooz for the sake of this conversation is as
much the same as saying zookeeper or consul or etcd, etc. We should be
focused (as both Flavio and Thierry said) on if we need DLM and what it will
: Gorka Eguileor [mailto:gegui...@redhat.com]
Sent: Monday, August 03, 2015 11:38 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA Active-Active
On Mon, Aug 03, 2015 at 07:01:45PM +1000, Morgan Fainberg wrote:
Lets
queries
for example)
Thanks,
Kevin
From: Gorka Eguileor [gegui...@redhat.com]
Sent: Monday, August 03, 2015 10:48 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active
questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind this. But, as others have
mentioned, I'd like us
List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind this. But, as others have
mentioned, I'd like us
:43 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] A possible solution for HA
Active-Active
On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:
Flavio Percoco wrote:
[...]
So, to summarize, I love the effort behind
Daniel Comnea wrote:
From Operators point of view i'd love to see less technology
proliferation in OpenStack, if you wear the developer hat please don't
be selfish, take into account the others :)
ZK is a robust technology but hey is a beast like Rabbit, there is a lot
to massage and over 2
On Aug 1, 2015, at 09:51, Monty Taylor mord...@inaugust.com wrote:
On 08/01/2015 03:40 AM, Mike Perez wrote:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow harlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
From Operators point of view i'd love to see less technology proliferation
in OpenStack, if you wear the developer hat please don't be selfish, take
into account the others :)
ZK is a robust technology but hey is a beast like Rabbit, there is a lot to
massage and over 2 data centers ZK is not
I couldn't put it better, nice write up Morgan!! +1
On Sun, Aug 2, 2015 at 10:28 AM, Morgan Fainberg morgan.fainb...@gmail.com
wrote:
On Aug 2, 2015, at 16:00, Daniel Comnea comnea.d...@gmail.com wrote:
From Operators point of view i'd love to see less technology
proliferation in
On Aug 2, 2015, at 16:00, Daniel Comnea comnea.d...@gmail.com wrote:
From Operators point of view i'd love to see less technology proliferation in
OpenStack, if you wear the developer hat please don't be selfish, take into
account the others :)
ZK is a robust technology but hey is a
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and
On Sat, Aug 1, 2015 at 2:51 AM, Monty Taylor mord...@inaugust.com wrote:
I hear tell that there a bunch of ops people who are in love with consul
At my company we love Consul. We found it to be very scalable and
performant, gives us an easy-to-use k/v store, membership service, DNS,
etc. We
Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileorgegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and since current plan is going to take a while
On 31 July 2015 at 20:40, Mike Perez thin...@gmail.com wrote:
Regardless, I want to know if we really need a DLM. Does Ceilometer
really need a DLM? Does Cinder really need a DLM? Can we just use a
hash ring solution where operators don't even have to know or care
about deploying a DLM and
Mike Perez wrote:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlowharlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
(http://mesos.apache.org/assets/img/documentation/architecture3.jpg),
map-reduce solutions like hadoop, stream
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow harlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
(http://mesos.apache.org/assets/img/documentation/architecture3.jpg),
map-reduce solutions like hadoop, stream processing
Excerpts from Mike Perez's message of 2015-07-31 10:40:04 -0700:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow harlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
Monty Taylor wrote:
On 08/01/2015 03:40 AM, Mike Perez wrote:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlowharlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
Clint Byrum wrote:
Excerpts from Mike Perez's message of 2015-07-31 10:40:04 -0700:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlowharlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
On 08/01/2015 03:40 AM, Mike Perez wrote:
On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow harlo...@outlook.com wrote:
...random thought here, skip as needed... in all honesty orchestration
solutions like mesos
(http://mesos.apache.org/assets/img/documentation/architecture3.jpg),
map-reduce
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and since current plan is going to take a while (because it
requires
On Fri, Jul 31, 2015 at 01:47:22AM -0700, Mike Perez wrote:
On Mon, Jul 27, 2015 at 12:35 PM, Gorka Eguileor gegui...@redhat.com wrote:
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and
Hi all,
I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and since current plan is going to take a while (because it
requires that we finish first fixing Cinder-Nova interactions), I've been
Thanks for this work Gorka. Even if we don't end up taking the approach you
suggest, there are parts that are undoubtedly useful piece of quality, well
thought out code, posted in clean patches, that can be used to easily try
out ideas that were not possible previously. I'm both impressed, and
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