Got it, thanks for your help Grant! On Wed, Aug 5, 2015 at 10:49 AM, Grant Henke <ghe...@cloudera.com> wrote:
> For any of the configs I can think of changing; this approach of taking no > outage should work. However, I would be sure to keep all of your configs > uniform instead of just changing the leader. Therefore the process would > look something like: > > 1) Alter the config files for all brokers (using the config management tool > of choice) > 2) Perform a rolling restart of the cluster 1 broker at a time > - Make sure controlled.shutdown.enable=true (docs here > <http://kafka.apache.org/documentation.html#basic_ops_restarting>) > - Make sure you move any partitions with replication=1 so that you > don't take an outage (or better yet have a higher replication in general) > 3) Rebalance leaders (docs here > <http://kafka.apache.org/documentation.html#basic_ops_leader_balancing>) > - Or enable auto.leader.rebalance.enable=true and it will > automatically happen for you > > Thanks, > Grant > > On Wed, Aug 5, 2015 at 12:26 PM, JIEFU GONG <jg...@berkeley.edu> wrote: > > > Hi all, > > > > According to https://issues.apache.org/jira/browse/KAFKA-1229, there is > > currently no support and no reason to support dynamic configuration > changes > > for Kafka servers that are already running. I just wanted to solidify my > > understanding of how configs would then be changed, specifically: > > > > If i wanted to change configs on a running cluster (say log retention) > but > > I do not want unavailability for that cluster at any time, would the > right > > way of changing the configs be: > > > > 1) Alter the config file > > 2) Bring down the leader broker using a controlled shutdown, letting > > replicas handle the load while the leader is down > > 3) Restart the leader broker with new configs, using preferred leader > > assignment to have it resume control > > > > Would I also need to bring down the in sync replicas and reboot them too? > > Thanks for the help! > > > > -- > > > > Jiefu Gong > > University of California, Berkeley | Class of 2017 > > B.A Computer Science | College of Letters and Sciences > > > > jg...@berkeley.edu <elise...@berkeley.edu> | (925) 400-3427 > > > > > > -- > Grant Henke > Software Engineer | Cloudera > gr...@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke > -- Jiefu Gong University of California, Berkeley | Class of 2017 B.A Computer Science | College of Letters and Sciences jg...@berkeley.edu <elise...@berkeley.edu> | (925) 400-3427
