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HADOOP-17204. Fix typo in Hadoop KMS document. Contributed by Xieming Li. 

(cherry picked from commit 141c62584b)
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Akira Ajisaka 2020-08-12 16:08:36 +09:00
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hadoop-common-project/hadoop-kms/src/site/markdown/index.md.vm
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@ -716,7 +716,7 @@ $H4 HTTP Kerberos Principals Configuration
When KMS instances are behind a load-balancer or VIP, clients will use the hostname of the VIP. For Kerberos SPNEGO authentication, the hostname of the URL is used to construct the Kerberos service name of the server, `HTTP/#HOSTNAME#`. This means that all KMS instances must have a Kerberos service name with the load-balancer or VIP hostname. When KMS instances are behind a load-balancer or VIP, clients will use the hostname of the VIP. For Kerberos SPNEGO authentication, the hostname of the URL is used to construct the Kerberos service name of the server, `HTTP/#HOSTNAME#`. This means that all KMS instances must have a Kerberos service name with the load-balancer or VIP hostname.
In order to be able to access directly a specific KMS instance, the KMS instance must also have Keberos service name with its own hostname. This is required for monitoring and admin purposes. In order to be able to access directly a specific KMS instance, the KMS instance must also have Kerberos service name with its own hostname. This is required for monitoring and admin purposes.
Both Kerberos service principal credentials (for the load-balancer/VIP hostname and for the actual KMS instance hostname) must be in the keytab file configured for authentication. And the principal name specified in the configuration must be '\*'. For example: Both Kerberos service principal credentials (for the load-balancer/VIP hostname and for the actual KMS instance hostname) must be in the keytab file configured for authentication. And the principal name specified in the configuration must be '\*'. For example: