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https://issues.apache.org/jira/browse/HDDS-17195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDDS-17195:
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Attachment: HDDS-17195.001.patch
> Ozone RPC client ignores ipc.client.bind.wildcard.addr when binding to the
> Kerberos principal host
> --------------------------------------------------------------------------------------------------
>
> Key: HDDS-17195
> URL: https://issues.apache.org/jira/browse/HDDS-17195
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Attachments: HDDS-17195.001.patch
>
>
> Ozone carries its own copy of the Hadoop RPC client
> ({{org.apache.hadoop.ipc_.Client}}). In secure mode, when the protocol has
> {{@KerberosInfo}}, {{Connection.setupConnection}} binds the client socket to
> the local address of the host in the caller's Kerberos principal before it
> connects.
> Hadoop lets operators turn that off with
> {{ipc.client.bind.wildcard.addr=true}}. Ozone's copy reads the flag into
> {{bindToWildCardAddress}} and computes {{bindTo}}, but then binds to
> {{localAddr}} anyway:
> {code:java}
> InetAddress bindTo = bindToWildCardAddress ? null : localAddr;
> LOG.debug("Binding {} to {}", principal, (bindToWildCardAddress) ? "0.0.0.0"
> : localAddr);
> this.socket.bind(new InetSocketAddress(localAddr, 0));
> {code}
> Upstream Hadoop honors the flag through
> {{NetUtils.bindToLocalAddress(localAddr, bindToWildCardAddress)}}. That
> method is already in Hadoop 3.4.3.
> h3. Impact on IPv6
> Service-to-service RPC in a secure cluster is affected: OM to SCM, datanode
> to SCM, and SCM to SCM. On a dual-stack host, the principal's host name
> resolves to the IPv4 address first by default. When the target service is
> configured with an IPv6 literal, the socket is bound to an IPv4 address and
> then connects to an IPv6 address, which fails. The reverse combination fails
> the same way.
> Upstream's escape hatch is {{ipc.client.bind.wildcard.addr=true}}, which
> Ozone currently ignores. IPv6-only clusters are not affected. No Hadoop
> release fixes this, because the code is Ozone's own copy.
> h3. Fix
> Use {{NetUtils.bindToLocalAddress}} as upstream does. With the default
> ({{false}}), behavior is unchanged.
> Parent epic: HDDS-15763.
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