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Zookeeper >> mail # user >> safely upgrade single instance to ensemble


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Re: safely upgrade single instance to ensemble
Are you ok with shutting down zookeeper and clients ? If yes, then

1. shutdown existing zookeeper
2. copy zookeeper data and translog directory new locations
3. change the zoo.config on each server to include all 3 servers. see
(http://zookeeper.apache.org/doc/r3.2.2/zookeeperStarted.html#sc_RunningReplicatedZooKeeper)

Start the servers, change your clients to use all
zk1:port1,zk2:port2,zk3:port3 in the connect string.

thanks,
Kishore G

On Wed, May 29, 2013 at 2:54 AM, Kuba Lekstan <[EMAIL PROTECTED]> wrote:
> Nothing bad should happen as long as you start your current ZK instance
> before other.
>
> BTW: Before doing the change in production environment do some tests.
>
>
> 2013/5/29 Nathaniel Domingo <[EMAIL PROTECTED]>
>
>> not existing cluster. zookeeper operating in standalone mode. i need to
>> convert it into a cluster for redundancy.
>>
>>
>> On Wed, May 29, 2013 at 4:34 PM, Kuba Lekstan <[EMAIL PROTECTED]> wrote:
>>
>> > Hello,
>> >
>> > If you want to just add one ZK node to existing cluster the easier and
>> > safest way would be to do a rolling restart.
>> >
>> > Kuba.
>> >
>> >
>> > 2013/5/29 Nathaniel Domingo <[EMAIL PROTECTED]>
>> >
>> > > Hi,
>> > >
>> > > What do you think is the safest way of upgrading a single instance
>> > > zookeeper to an ensemble? The goal is not to loose any data.
>> > >
>> > > Regards,
>> > > Nathaniel
>> > >
>> >
>>