Mihai L Lalescu created FLINK-33368:
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Summary: Support for SNI in the Flink Client
Key: FLINK-33368
URL: https://issues.apache.org/jira/browse/FLINK-33368
Project: Flink
Issue Type: New Feature
Components: Command Line Client
Environment: Flink Cluster on OpenShift
VIP requiring SNI
Flink client running on a VM
Flink version 16.2
Java 8
Reporter: Mihai L Lalescu
Fix For: 1.16.3
We have Flink clusters running on OpenShift behind a VIP that requires SNI
(Server Name Information). The Flink client fails to connect to the Job Manager
REST API through the VIP due to lack of SNI support in the Client. The
connection was using TLS 1.2.
If required, I can provide Wireshark traces. The TLS 1.2 Client Hello package
does not contain any SNI info.
I have also searched the Flink source code for the netty SniHandler class and I
could not find any use of that class.
I have not seen any SNI references here
https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/rest/RestClient.java
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