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Posted to user@zookeeper.apache.org by Dayo Oliyide <da...@gmail.com> on 2014/11/12 16:18:09 UTC
Migrating Zookeeper cluster (3.4.6) to different machines
Hi,
I currently need to move a running Zookeeper cluster (3 nodes) to a
different group of machines.
Is this possible ?
Is there any advice or guide on how to do this ?
Thanks
--Dayo
Re: Migrating Zookeeper cluster (3.4.6) to different machines
Posted by ralph tice <ra...@gmail.com>.
We've always done a rolling restart of the cluster when we add new
nodes to make sure all ZK are talking to each other. It's definitely
a great way to validate whether your ZK clients are correctly
configured for retries.
We don't ever try to replace machines with the same ID as a previous
node, as per earlier in the thread that's not a good idea unless the
IP stays the same and I don't think it's worth the effort of shrinking
your quorum and juggling IPs.
The docs for the new dynamic reconfiguration feature in 3.5+ has a
good summation of the historical context that applies to 3.4.6 re:
rolling restarts
http://zookeeper.apache.org/doc/trunk/zookeeperReconfig.html
On Wed, Nov 12, 2014 at 5:53 PM, Otis Gospodnetic
<ot...@gmail.com> wrote:
> Hi,
>
> Would it not be possible to just add new nodes one by one and remove old
> ones one by one to keep the cluster healthy during the transition?
>
> Thanks,
> Otis
> --
> Monitoring * Alerting * Anomaly Detection * Centralized Log Management
> Solr & Elasticsearch Support * http://sematext.com/
>
>
> On Wed, Nov 12, 2014 at 3:51 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
>
>> I dont think this is possible with 3.4.6 then, at least not without
>> taking down the cluster.
>>
>> On 12 November 2014 17:20, Dayo Oliyide <da...@gmail.com> wrote:
>> > Hi Ivan,
>> >
>> > Unfortunately, I believe the IPs will change.
>> >
>> > --Dayo
>> >
>> > On Wed, Nov 12, 2014 at 3:21 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
>> >
>> >> One by one. Will these machine have the same ips as the old machines?
>> >> If not, you have a problem, as changing the ips is only supported in
>> >> 3.5.0+. It's the reconfig feature.
>> >>
>> >> -Ivan
>> >>
>> >> On 12 November 2014 16:18, Dayo Oliyide <da...@gmail.com> wrote:
>> >> > Hi,
>> >> >
>> >> > I currently need to move a running Zookeeper cluster (3 nodes) to a
>> >> > different group of machines.
>> >> > Is this possible ?
>> >> > Is there any advice or guide on how to do this ?
>> >> >
>> >> > Thanks
>> >> > --Dayo
>> >>
>>
Re: Migrating Zookeeper cluster (3.4.6) to different machines
Posted by Otis Gospodnetic <ot...@gmail.com>.
Hi,
Would it not be possible to just add new nodes one by one and remove old
ones one by one to keep the cluster healthy during the transition?
Thanks,
Otis
--
Monitoring * Alerting * Anomaly Detection * Centralized Log Management
Solr & Elasticsearch Support * http://sematext.com/
On Wed, Nov 12, 2014 at 3:51 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
> I dont think this is possible with 3.4.6 then, at least not without
> taking down the cluster.
>
> On 12 November 2014 17:20, Dayo Oliyide <da...@gmail.com> wrote:
> > Hi Ivan,
> >
> > Unfortunately, I believe the IPs will change.
> >
> > --Dayo
> >
> > On Wed, Nov 12, 2014 at 3:21 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
> >
> >> One by one. Will these machine have the same ips as the old machines?
> >> If not, you have a problem, as changing the ips is only supported in
> >> 3.5.0+. It's the reconfig feature.
> >>
> >> -Ivan
> >>
> >> On 12 November 2014 16:18, Dayo Oliyide <da...@gmail.com> wrote:
> >> > Hi,
> >> >
> >> > I currently need to move a running Zookeeper cluster (3 nodes) to a
> >> > different group of machines.
> >> > Is this possible ?
> >> > Is there any advice or guide on how to do this ?
> >> >
> >> > Thanks
> >> > --Dayo
> >>
>
Re: Migrating Zookeeper cluster (3.4.6) to different machines
Posted by Ivan Kelly <iv...@ivankelly.net>.
I dont think this is possible with 3.4.6 then, at least not without
taking down the cluster.
On 12 November 2014 17:20, Dayo Oliyide <da...@gmail.com> wrote:
> Hi Ivan,
>
> Unfortunately, I believe the IPs will change.
>
> --Dayo
>
> On Wed, Nov 12, 2014 at 3:21 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
>
>> One by one. Will these machine have the same ips as the old machines?
>> If not, you have a problem, as changing the ips is only supported in
>> 3.5.0+. It's the reconfig feature.
>>
>> -Ivan
>>
>> On 12 November 2014 16:18, Dayo Oliyide <da...@gmail.com> wrote:
>> > Hi,
>> >
>> > I currently need to move a running Zookeeper cluster (3 nodes) to a
>> > different group of machines.
>> > Is this possible ?
>> > Is there any advice or guide on how to do this ?
>> >
>> > Thanks
>> > --Dayo
>>
Re: Migrating Zookeeper cluster (3.4.6) to different machines
Posted by Dayo Oliyide <da...@gmail.com>.
Hi Ivan,
Unfortunately, I believe the IPs will change.
--Dayo
On Wed, Nov 12, 2014 at 3:21 PM, Ivan Kelly <iv...@ivankelly.net> wrote:
> One by one. Will these machine have the same ips as the old machines?
> If not, you have a problem, as changing the ips is only supported in
> 3.5.0+. It's the reconfig feature.
>
> -Ivan
>
> On 12 November 2014 16:18, Dayo Oliyide <da...@gmail.com> wrote:
> > Hi,
> >
> > I currently need to move a running Zookeeper cluster (3 nodes) to a
> > different group of machines.
> > Is this possible ?
> > Is there any advice or guide on how to do this ?
> >
> > Thanks
> > --Dayo
>
Re: Migrating Zookeeper cluster (3.4.6) to different machines
Posted by Ivan Kelly <iv...@ivankelly.net>.
One by one. Will these machine have the same ips as the old machines?
If not, you have a problem, as changing the ips is only supported in
3.5.0+. It's the reconfig feature.
-Ivan
On 12 November 2014 16:18, Dayo Oliyide <da...@gmail.com> wrote:
> Hi,
>
> I currently need to move a running Zookeeper cluster (3 nodes) to a
> different group of machines.
> Is this possible ?
> Is there any advice or guide on how to do this ?
>
> Thanks
> --Dayo