[HADOOP-16350] Ability to tell HDFS client not to request KMS Information from NameNode

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.3, 3.0.0, 2.7.6, 3.1.2
• Fix Version/s: 3.3.0, 2.8.6
• Component/s: common, kms
• Assignee: Unassigned
• Reporter: Greg Senia
• Created: 05/Jun/19 12:32
• Updated: 02/Oct/19 17:14
• Resolved: 25/Jun/19 21:24

Description

Before HADOOP-14104 Remote KMSServer URIs were not requested from the remote NameNode and their associated remote KMSServer delegation token. Many customers were using this as a security feature to prevent TDE/Encryption Zone data from being distcped to remote clusters. But there was still a use case to allow distcp of data residing in folders that are not being encrypted with a KMSProvider/Encrypted Zone.

So after upgrading to a version of Hadoop that contained HADOOP-14104 distcp now fails as we along with other customers (HDFS-13696) DO NOT allow KMSServer endpoints to be exposed out of our cluster network as data residing in these TDE/Zones contain very critical data that cannot be distcped between clusters.

I propose adding a new code block with the following custom property "hadoop.security.kms.client.allow.remote.kms" it will default to "true" so keeping current feature of HADOOP-14104 but if specified to "false" will allow this area of code to operate as it did before HADOOP-14104. I can see the value in HADOOP-14104 but the way Hadoop worked before this JIRA/Issue should of at least had an option specified to allow Hadoop/KMS code to operate similar to how it did before by not requesting remote KMSServer URIs which would than attempt to get a delegation token even if not operating on encrypted zones.

Error when KMS Server traffic is not allowed between cluster networks per enterprise security standard which cannot be changed they denied the request for exception so the only solution is to allow a feature to not attempt to request tokens. 

$ hadoop distcp -Ddfs.namenode.kerberos.principal.pattern=* -Dmapreduce.job.hdfs-servers.token-renewal.exclude=tech hdfs:///processed/public/opendata/samples/distcp_test/distcp_file.txt hdfs://tech/processed/public/opendata/samples/distcp_test/distcp_file2.txt
19/05/29 14:06:09 INFO tools.DistCp: Input Options: DistCpOptions

{atomicCommit=false, syncFolder=false, deleteMissing=false, ignoreFailures=false, overwrite=false, append=false, useDiff=false, fromSnapshot=null, toSnapshot=null, skipCRC=false, blocking=true, numListstatusThreads=0, maxMaps=20, mapBandwidth=100, sslConfigurationFile='null', copyStrategy='uniformsize', preserveStatus=[], preserveRawXattrs=false, atomicWorkPath=null, logPath=null, sourceFileListing=null, sourcePaths=[hdfs:/processed/public/opendata/samples/distcp_test/distcp_file.txt], targetPath=hdfs://tech/processed/public/opendata/samples/distcp_test/distcp_file2.txt, targetPathExists=true, filtersFile='null', verboseLog=false}
19/05/29 14:06:09 INFO client.AHSProxy: Connecting to Application History server at ha21d53mn.unit.hdp.example.com/10.70.49.2:10200
19/05/29 14:06:10 INFO hdfs.DFSClient: Created HDFS_DELEGATION_TOKEN token 5093920 for gss2002 on ha-hdfs:unit
19/05/29 14:06:10 INFO security.TokenCache: Got dt for hdfs://unit; Kind: HDFS_DELEGATION_TOKEN, Service: ha-hdfs:unit, Ident: (HDFS_DELEGATION_TOKEN token 5093920 for gss2002)
19/05/29 14:06:10 INFO security.TokenCache: Got dt for hdfs://unit; Kind: kms-dt, Service: ha21d53en.unit.hdp.example.com:9292, Ident: (owner=gss2002, renewer=yarn, realUser=, issueDate=1559153170120, maxDate=1559757970120, sequenceNumber=237, masterKeyId=2)
19/05/29 14:06:10 INFO tools.SimpleCopyListing: Paths (files+dirs) cnt = 1; dirCnt = 0
19/05/29 14:06:10 INFO tools.SimpleCopyListing: Build file listing completed.
19/05/29 14:06:10 INFO tools.DistCp: Number of paths in the copy list: 1
19/05/29 14:06:10 INFO tools.DistCp: Number of paths in the copy list: 1
19/05/29 14:06:10 INFO client.AHSProxy: Connecting to Application History server at ha21d53mn.unit.hdp.example.com/10.70.49.2:10200
19/05/29 14:06:10 INFO hdfs.DFSClient: Created HDFS_DELEGATION_TOKEN token 556079 for gss2002 on ha-hdfs:tech
19/05/29 14:06:10 ERROR tools.DistCp: Exception encountered 
java.io.IOException: java.net.NoRouteToHostException: No route to host (Host unreachable)
at org.apache.hadoop.crypto.key.kms.KMSClientProvider.addDelegationTokens(KMSClientProvider.java:1029)
at org.apache.hadoop.crypto.key.KeyProviderDelegationTokenExtension.addDelegationTokens(KeyProviderDelegationTokenExtension.java:110)
at org.apache.hadoop.hdfs.DistributedFileSystem.addDelegationTokens(DistributedFileSystem.java:2407)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:140)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:100)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodes(TokenCache.java:80)
at org.apache.hadoop.tools.mapred.CopyOutputFormat.checkOutputSpecs(CopyOutputFormat.java:124)
at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:266)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:139)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1869)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287)
at org.apache.hadoop.tools.DistCp.createAndSubmitJob(DistCp.java:193)
at org.apache.hadoop.tools.DistCp.execute(DistCp.java:155)
at org.apache.hadoop.tools.DistCp.run(DistCp.java:128)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.tools.DistCp.main(DistCp.java:462)
Caused by: java.net.NoRouteToHostException: No route to host (Host unreachable)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
at sun.net.www.http.HttpClient.New(HttpClient.java:339)
at sun.net.www.http.HttpClient.New(HttpClient.java:357)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
at org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:188)
at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:133)
at org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:216)
at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.doDelegationTokenOperation(DelegationTokenAuthenticator.java:299)
at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.getDelegationToken(DelegationTokenAuthenticator.java:171)
at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticatedURL.getDelegationToken(DelegationTokenAuthenticatedURL.java:373)
at org.apache.hadoop.crypto.key.kms.KMSClientProvider$4.run(KMSClientProvider.java:1016)
at org.apache.hadoop.crypto.key.kms.KMSClientProvider$4.run(KMSClientProvider.java:1011)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1869)
at org.apache.hadoop.crypto.key.kms.KMSClientProvider.addDelegationTokens(KMSClientProvider.java:1011)
... 19 more

 

 

Issue Links

• is related to: HDFS-13696 Distcp between 2 secure clusters and non encrypted zones fails with connection timeout
• is related to: HADOOP-14104 Client should always ask namenode for kms provider path.