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https://issues.apache.org/jira/browse/CASSANDRA-12673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179677#comment-16179677
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Jia Tan commented on CASSANDRA-12673:
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Hi, we are using 3.0.x releases and we want to have similar setup for a cluster:
*listen_address*: bound to private interface
*broadcast_address*: bound to public address
*listen_on_broadcast_address*: false
How should we configure cassandra to make it work for 3.0.14 version? The `if`
statement is still there, and with `Config.outboundBindAny` and
`conf.listen_on_broadcast_address` both set to false, cassandra would still
bind outbound connections to localhost. Also FYI, we're using a proxy to proxy
the traffic from public interface to private interface. Thanks!
> Nodes cannot see each other in multi-DC, non-EC2 environment with
> two-interface nodes due to outbound node-to-node connection binding to
> private interface
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-12673
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12673
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Multi-DC, non-EC2 environment with two-interface nodes
> Reporter: Milan Majercik
> Assignee: Milan Majercik
> Priority: Minor
> Fix For: 2.2.9, 3.0.11, 3.10
>
>
> We have a two-DC cluster in non-EC2 environment with each node containing two
> interfaces, one using private addresses for intra-DC communication and the
> other using public addresses for inter-DC communication. After proper
> configuration setup needed for this kind of environment we observed nodes
> cannot see each other.
> The configuration changes made for this purpose are as follows:
> *listen_address*: bound to private interface
> *broadcast_address*: bound to public address
> *listen_on_broadcast_address*: true
> *endpoint_snitch*: GossipingPropertyFileSnitch
> *prefer_local*=true (in cassandra-rackdc.properties)
> Upon restart, cassandra node contacts other nodes with their public addresses
> which is essential for making contacts to foreign data centers. After
> exhaustive investigation we found cassandra binds outbound node-to-node
> connections to private interface (the one specified in listen_address) that
> poses a problem for our environment as these data centers _do not allow
> connections from private interface to public network_.
> A portion of cassandra code responsible for local binding of outbound
> connections can be found in method
> {{org.apache.cassandra.net.OutboundTcpConnectionPool.newSocket}}:
> {code}
> if (!Config.getOutboundBindAny())
> channel.bind(new
> InetSocketAddress(FBUtilities.getLocalAddress(), 0));
> {code}
> After we commented out these two lines and deployed cassandra.jar across the
> cluster, the nodes were able to see each other and everything appears to be
> working fine, including two-DC setup.
> Do you think it's possible to remove these two lines without negative
> consequences? Alternatively, if the local binding serves some specific
> purpose of which I'm ignorant would it be possible to make it configurable?
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