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HADOOP-17050. S3A to support additional token issuers

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Contributed by Steve Loughran.

S3A delegation token providers will be asked for any additional
token issuers, an array can be returned,
each one will be asked for tokens when DelegationTokenIssuer collects
all the tokens for a filesystem.

Change-Id: I1bd3035bbff98cbd8e1d1ac7fc615d937e6bb7bb
This commit is contained in:
Steve Loughran 2020-06-09 14:39:06 +01:00
parent 2d4faa39e8
commit 5e290e702f
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GPG Key ID: D22CF846DBB162A0
2 changed files with 34 additions and 0 deletions
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20
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java
View File

@ -114,6 +114,7 @@
import org.apache.hadoop.fs.s3a.select.InternalSelectConstants;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.token.DelegationTokenIssuer;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.util.DurationInfo;
import org.apache.hadoop.util.LambdaUtils;
@ -3377,6 +3378,25 @@ public Token<AbstractS3ATokenIdentifier> getDelegationToken(String renewer)
}
}
/**
* Ask any DT plugin for any extra token issuers.
* These do not get told of the encryption secrets and can
* return any type of token.
* This allows DT plugins to issue extra tokens for
* ancillary services.
*/
@Override
public DelegationTokenIssuer[] getAdditionalTokenIssuers()
throws IOException {
if (delegationTokens.isPresent()) {
return delegationTokens.get().getAdditionalTokenIssuers();
} else {
// Delegation token support is not set up
LOG.debug("Token support is not enabled");
return null;
}
}
/**
* Build the AWS policy for restricted access to the resources needed
* by this bucket.

14
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/auth/delegation/S3ADelegationTokens.java
View File

@ -40,6 +40,7 @@
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.DelegationTokenIssuer;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.service.ServiceOperations;
import org.apache.hadoop.util.DurationInfo;
@ -447,6 +448,19 @@ private void noteTokenCreated(final Token<AbstractS3ATokenIdentifier> token) {
stats.tokenIssued();
}
/**
* Get a null/possibly empty list of extra delegation token issuers.
* These will be asked for tokens when
* {@link DelegationTokenIssuer#getAdditionalTokenIssuers()} recursively
* collects all DTs a filesystem can offer.
* @return a null or empty array. Default implementation: null
* @throws IOException failure
*/
public DelegationTokenIssuer[] getAdditionalTokenIssuers()
throws IOException {
return null;
}
/**
* Get the AWS credential provider.
* @return the DT credential provider