exceptionfactory commented on a change in pull request #5277:
URL: https://github.com/apache/nifi/pull/5277#discussion_r691332143
##########
File path:
nifi-nar-bundles/nifi-extension-utils/nifi-hadoop-utils/src/main/java/org/apache/nifi/processors/hadoop/AbstractHadoopProcessor.java
##########
@@ -450,6 +476,36 @@ HdfsResources resetHDFSResources(final List<String>
resourceLocations, ProcessCo
return new HdfsResources(config, fs, ugi, kerberosUser);
}
+ private KerberosUser getKerberosUser(final ProcessContext context) throws
IOException {
+ // Check Kerberos User Service first, if present then get the
KerberosUser from the service
+ // The customValidate method ensures that KerberosUserService can't be
set at the same time as the credentials service or explicit properties
+ final KerberosUserService kerberosUserService =
context.getProperty(KERBEROS_USER_SERVICE).asControllerService(KerberosUserService.class);
+ if (kerberosUserService != null) {
+ return kerberosUserService.createKerberosUser();
+ }
+
+ // Kerberos User Service wasn't set, so create KerberosUser based on
credentials service or explicit properties...
+ String principal =
context.getProperty(kerberosProperties.getKerberosPrincipal()).evaluateAttributeExpressions().getValue();
+ String keyTab =
context.getProperty(kerberosProperties.getKerberosKeytab()).evaluateAttributeExpressions().getValue();
+ String password =
context.getProperty(kerberosProperties.getKerberosPassword()).getValue();
+
+ // If the Kerberos Credentials Service is specified, we need to use
its configuration, not the explicit properties for principal/keytab.
+ // The customValidate method ensures that only one can be set, so we
know that the principal & keytab above are null.
+ final KerberosCredentialsService credentialsService =
context.getProperty(KERBEROS_CREDENTIALS_SERVICE).asControllerService(KerberosCredentialsService.class);
+ if (credentialsService != null) {
+ principal = credentialsService.getPrincipal();
+ keyTab = credentialsService.getKeytab();
+ }
+
+ if (keyTab != null) {
+ return new KerberosKeytabUser(principal, keyTab);
+ } else if (password != null) {
+ return new KerberosPasswordUser(principal, password);
+ } else {
+ throw new IOException("Unable to authenticate with Kerberos, no
keytab or password was provided");
Review comment:
Thanks for looking into this behavior. `IllegalStateException` sounds
good given that validation should prevent this from happening.
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