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https://issues.apache.org/jira/browse/ZOOKEEPER-2125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14340406#comment-14340406
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Hongchao Deng commented on ZOOKEEPER-2125:
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I just figured out a flaw in current design and would like to ask for help.
The current client will retry connecting if failed. This isn't desired in SSL
case where user put wrong parameters and client would keep failing. There are a
few options:
1. the connection could failed over to normal unencrypted mode.
2. client could die on knowing SSL exception.
3. Server can failover to accepting any credentials.
I'm not sure what's the right way to go, nor the technical details to implement
it. Anyone can help here?
> SSL on Netty client-server communication
> ----------------------------------------
>
> Key: ZOOKEEPER-2125
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2125
> Project: ZooKeeper
> Issue Type: Sub-task
> Reporter: Hongchao Deng
> Assignee: Hongchao Deng
> Fix For: 3.5.1
>
> Attachments: ZOOKEEPER-2125.patch, ZOOKEEPER-2125.patch,
> ZOOKEEPER-2125.patch, ZOOKEEPER-2125.patch
>
>
> Supporting SSL on Netty client-server communication.
> 1. It supports keystore and trustore usage.
> 2. It adds an additional ZK server port which supports SSL. This would be
> useful for rolling upgrade.
> RB: https://reviews.apache.org/r/31277/
> h2. How to use it
> You need to set some parameters on both ZK server and client.
> h3. Server
> You need to specify a listening SSL port in "zoo.cfg":
> {code}
> secureClientPort=2281
> {code}
> Just like what you did with "clientPort". And then set some jvm flags:
> {code}
> export
> SERVER_JVMFLAGS="-Dzookeeper.serverCnxnFactory=org.apache.zookeeper.server.NettyServerCnxnFactory
> -Dzookeeper.ssl.keyStore.location=/root/zookeeper/ssl/testKeyStore.jks
> -Dzookeeper.ssl.keyStore.password=testpass
> -Dzookeeper.ssl.trustStore.location=/root/zookeeper/ssl/testTrustStore.jks
> -Dzookeeper.ssl.trustStore.password=testpass"
> {code}
> Please change keystore and truststore parameters accordingly.
> h3. Client
> You need to set jvm flags:
> {code}
> export
> CLIENT_JVMFLAGS="-Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty
> -Dzookeeper.client.secure=true
> -Dzookeeper.ssl.keyStore.location=/root/zookeeper/ssl/testKeyStore.jks
> -Dzookeeper.ssl.keyStore.password=testpass
> -Dzookeeper.ssl.trustStore.location=/root/zookeeper/ssl/testTrustStore.jks
> -Dzookeeper.ssl.trustStore.password=testpass"
> {code}
> change keystore and truststore parameters accordingly.
> And then connect to the server's SSL port, in this case:
> {code}
> bin/zkCli.sh -server 127.0.0.1:2281
> {code}
> If you have any feedback, you are more than welcome to discuss it here!
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