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Subject [GitHub] maoling opened a new pull request #624: ZOOKEEPER-3108:use a new property:myid in the zoo.cfg to substitute for myid file under the dataDir
Date Sun, 17 Feb 2019 07:40:08 GMT
maoling opened a new pull request #624: ZOOKEEPER-3108:use a new property:myid in the zoo.cfg
to substitute for myid file under the dataDir
URL: https://github.com/apache/zookeeper/pull/624
 
 
   - use a new property `myid` in the `zoo.cfg` to substitute for `myid `file,If the unique
id is both set in the `myid` of `zoo.cfg` and `myid` file,they must be the same value.
   - I had tested this patch in my docker in standalone and qurom mode with mixed `myid` file
and the `myid`property in the zoo.cfg.
     it has any intrude,totally backwards compatibility,branch3.4 can still use myid file,
but branch 3.5+,
     suggest to use `myid `in the zoo.cfg
   - the related UTs `ZooKeeperServerMainTest.testStandalone()` and `QuorumPeerMainTest.testQuorum()
`have passed,before reviewing,let's listen to the QA report in case of something I miss 
   - more details and disscusion in [ZOOKEEPER-3108](https://issues.apache.org/jira/browse/ZOOKEEPER-3108)

   - Let me list why this is needed:
   **1.** put the `myid` which's about the conf of server in the `dataDir` is not a good idea.if
I want to `rm -rf `the data in this directory manually,I will delete the `myid` file by mistake.
   **2.** conf like this will be easy-to-read,and tell me who I am, just like `kafka's` `server.properties`
does.
     ``` 
     myid = 2
     ---*******---
     server.1=172.17.0.2:2888:3888
     server.2=172.17.0.2:12888:13888
     server.3=172.17.0.2:22888:23888
   ```
   
   

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