[HDFS-13541] NameNode Port based selective encryption

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: datanode, namenode, security
• Labels: release-blocker
• Target Version/s: 2.10.0, 3.3.0

Release Note

This feature allows HDFS to selectively enforce encryption for both RPC (NameNode) and data transfer (DataNode). With this feature enabled, NameNode can listen on multiple ports, and different ports can have different security configurations. Depending on which NameNode port clients connect to, the RPC calls and the following data transfer will enforce security configuration corresponding to this NameNode port. This can help when there is requirement to enforce different security policies depending on the location where the clients are connecting from.

This can be enabled by setting `hadoop.security.saslproperties.resolver.class` configuration to `org.apache.hadoop.security.IngressPortBasedResolver`, and add the additional NameNode auxiliary ports by setting `dfs.namenode.rpc-address.auxiliary-ports`, and set the security individual ports by configuring `ingress.port.sasl.configured.ports`.

• Assignee: Chen Liang
• Reporter: Chen Liang
• Created: 09/May/18 17:27
• Updated: 24/May/23 19:02
• Resolved: 09/Sep/19 18:39

Description

Here at LinkedIn, one issue we face is that we need to enforce different security requirement based on the location of client and the cluster. Specifically, for clients from outside of the data center, it is required by regulation that all traffic must be encrypted. But for clients within the same data center, unencrypted connections are more desired to avoid the high encryption overhead. 

HADOOP-10221 introduced pluggable SASL resolver, based on which HADOOP-10335 introduced WhitelistBasedResolver which solves the same problem. However we found it difficult to fit into our environment for several reasons. In this JIRA, on top of pluggable SASL resolver, we propose a different approach of running RPC two ports on NameNode, and the two ports will be enforcing encrypted and unencrypted connections respectively, and the following DataNode access will simply follow the same behaviour of encryption/unencryption. Then by blocking unencrypted port on datacenter firewall, we can completely block unencrypted external access.

Issue Links

• relates to: HDFS-16644 java.io.IOException Invalid token in javax.security.sasl.qop
• relates to: HDFS-17025 RBF: Support port based selective encryption on routers.