[jira] Commented: (ZOOKEEPER-279) Variable expansion in zoo.cfg

["Nitay Joffe (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667361#action_12667361 ] 

Nitay Joffe commented on ZOOKEEPER-279:
---------------------------------------

More specifically, we are trying to make zoo.cfg play nicely with hadoop/hbase conf so that we can interpolate things like hadoop.tmp.dir as the default for the ZK dataDir.

> Variable expansion in zoo.cfg
> -----------------------------
>
>                 Key: ZOOKEEPER-279
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-279
>             Project: Zookeeper
>          Issue Type: Improvement
>            Reporter: Nitay Joffe
>            Priority: Minor
>
> We would like to define certain parts of ZooKeeper's configuration using variables that get substituted. For example, we want the ZooKeeper quorum to be able to use a dataDir configured per user. In other words, something like:
> tickTime=2000
> dataDir=/tmp/zookeeper-${user.name}
> clientPort=2181
> initLimit=5
> syncLimit=2
> server.1=zoo1:2888:3888
> server.2=zoo2:2888:3888
> server.3=zoo3:2888:3888
> I think Java already has a system for configuration that allows something like this using Properties?

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