LamiumAmplexicaule commented on code in PR #7349:
URL: https://github.com/apache/kyuubi/pull/7349#discussion_r3020144626


##########
kyuubi-ha/src/main/scala/org/apache/kyuubi/ha/HighAvailabilityConf.scala:
##########
@@ -106,12 +106,27 @@ object HighAvailabilityConf {
       .version("1.3.2")
       .fallbackConf(KyuubiConf.SERVER_PRINCIPAL)
 
+  val HA_ZK_ENGINE_AUTH_PRINCIPAL: ConfigEntry[Option[String]] =
+    buildConf("kyuubi.ha.zookeeper.engine.auth.principal")
+      .doc("Kerberos principal name that is used for the engine's ZooKeeper 
authentication. " +
+        "It fallback to `kyuubi.ha.zookeeper.auth.principal`")
+      .version("1.12.0")
+      .fallbackConf(HighAvailabilityConf.HA_ZK_AUTH_PRINCIPAL)
+
   val HA_ZK_AUTH_KEYTAB: ConfigEntry[Option[String]] =
     buildConf("kyuubi.ha.zookeeper.auth.keytab")
       .doc("Location of the Kyuubi server's keytab that is used for ZooKeeper 
authentication.")
       .version("1.3.2")
       .fallbackConf(KyuubiConf.SERVER_KEYTAB)
 
+  val HA_ZK_ENGINE_AUTH_KEYTAB: ConfigEntry[Option[String]] =
+    buildConf("kyuubi.ha.zookeeper.engine.auth.keytab")
+      .doc("Location of the Kyuubi server's keytab that is used for " +

Review Comment:
   Thank you for your review.
   
   > I think you mean "engine"?
   
   Yes. it is typo. I will fix it.
   
   > do you assume that the keytab was pre-distributed to each machine that the 
engine (e.g., spark driver) might be run?
   
   No. As before, the administrator just needs to place the Engine’s keytab 
used for Zookeeper authentication on Kyuubi.
   
   - 
https://github.com/apache/kyuubi/blob/fd5ee95ffe81f648cf2294c0ceafe3f926d55096/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilder.scala#L211



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