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https://issues.apache.org/jira/browse/KYLIN-4834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shao Feng Shi resolved KYLIN-4834.
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Fix Version/s: all
Resolution: Not A Problem
> Auto forward the job API request to the available leader job server
> -------------------------------------------------------------------
>
> Key: KYLIN-4834
> URL: https://issues.apache.org/jira/browse/KYLIN-4834
> Project: Kylin
> Issue Type: Wish
> Components: Others
> Reporter: yoonsung.lee
> Priority: Minor
> Fix For: all
>
>
> Hi. I'm yoonsung.lee developing & operating the statistical storage using
> Kylin in LINE Advertising dept.
> h1. Current Situation
> I understand there is only one active leader job server instance in a Kylin
> cluster.
> The leader job server is selected by Zookeeper if there are multiple active
> job servers in a Kylin cluster.
> This is my pain point.
> When my leader job server has a fault or shutdown, I want to change the
> leader job server automatically and the DNS server route the traffic to the
> changed one.
> In this case, I should know which one is the leader job server as soon as
> possible the leader(active) has changed.
> For this one, I try to watch the path of Zookeeper in which the Kylin server
> maintains the server list in a cluster.
> But, this approach has a fault in essence. It's not an implementation
> controlled by Kylin.
> h1. Question
> Is my approach appropriate for the Kylin cluster?
> If not, is there any better idea for fault tolerance of job servers with auto
> DNS or LoadBalancer mapping?
> h1. Suggestion
> So, I suggest this idea.
> Any server in a Kylin cluster forwards the API request to the leader job
> server in the case that the request should be done by the job server and pass
> valid authentication. If then, I just attach all of the servers to my
> LoadBalancer without caring about which one is the leader job server.
> * Could this feature be harmful or have side-effects?
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