[SPARK-21642] Use FQDN for DRIVER_HOST_ADDRESS instead of ip address

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0, 2.2.0
• Fix Version/s: 2.3.0
• Component/s: Spark Core
• Assignee: Aki Tanaka
• Reporter: Aki Tanaka
• Created: 04/Aug/17 15:00
• Updated: 14/Dec/20 08:18
• Resolved: 17/Aug/17 14:02

Description

In current implementation, ip address of a driver host is set to DRIVER_HOST_ADDRESS [1]. This becomes a problem when we enable SSL using "spark.ssl.enabled", "spark.ssl.trustStore" and "spark.ssl.keyStore" properties. When we configure these properties, spark web ui is launched with SSL enabled and the HTTPS server is configured with the custom SSL certificate you configured in these properties.

In this case, client gets javax.net.ssl.SSLPeerUnverifiedException exception when the client accesses the spark web ui because the client fails to verify the SSL certificate (Common Name of the SSL cert does not match with DRIVER_HOST_ADDRESS).
To avoid the exception, we should use FQDN of the driver host for DRIVER_HOST_ADDRESS.

[1] https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/internal/config/package.scala#L222
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/util/Utils.scala#L942

Error message that client gets when the client accesses spark web ui:
javax.net.ssl.SSLPeerUnverifiedException: Certificate for <10.102.138.239> doesn't match any of the subject alternative names: []

$ spark-submit /path/to/jar
..
17/08/04 14:48:07 INFO Utils: Successfully started service 'SparkUI' on port 4040.
17/08/04 14:48:07 INFO SparkUI: Bound SparkUI to 0.0.0.0, and started at http://10.43.3.8:4040

$ curl -I http://10.43.3.8:4040
HTTP/1.1 302 Found
Date: Fri, 04 Aug 2017 14:48:20 GMT
Location: https://10.43.3.8:4440/
Content-Length: 0
Server: Jetty(9.2.z-SNAPSHOT)

$ curl -v https://10.43.3.8:4440
* Rebuilt URL to: https://10.43.3.8:4440/
*   Trying 10.43.3.8...
* TCP_NODELAY set
* Connected to 10.43.3.8 (10.43.3.8) port 4440 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* Server certificate:
* 	subject: CN=*.example.com,OU=MyDept,O=MyOrg,L=Area,C=US
* 	start date: Jun 12 00:05:02 2017 GMT
* 	expire date: Jun 12 00:05:02 2018 GMT
* 	common name: *.example.com
* 	issuer: CN=*.example.com,OU=MyDept,O=MyOrg,L=Area,C=US

Issue Links

• causes: SPARK-33774 "Back to Master" returns 500 error in Standalone cluster