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https://issues.apache.org/jira/browse/YARN-4006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292429#comment-15292429
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Larry McCay commented on YARN-4006:
-----------------------------------
Hi [~aw] - I am familiar with AltKerberosAuthenticationHandler if that is what
you mean.
This patch looks to be perfectly sane for enabling custom authentication
handlers - AltKerberos obviously interrogates the UserAgent and muxes between
kerberos and the customer handler.
There isn't anything that is specific to AltKeberos about this patch but such
extensions should work fine.
What is the question on this patch - it seems rather simple?
> YARN ATS Alternate Kerberos HTTP Authentication Changes
> -------------------------------------------------------
>
> Key: YARN-4006
> URL: https://issues.apache.org/jira/browse/YARN-4006
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: security, timelineserver
> Affects Versions: 2.5.0, 2.6.0, 2.7.0, 2.5.1, 2.6.1, 2.8.0, 2.7.1, 2.7.2
> Reporter: Greg Senia
> Assignee: Greg Senia
> Priority: Blocker
> Attachments: YARN-4006-branch-trunk.patch,
> YARN-4006-branch2.6.0.patch, sample-ats-alt-auth.patch
>
>
> When attempting to use The Hadoop Alternate Authentication Classes. They do
> not exactly work with what was built with YARN-1935.
> I went ahead and made the following changes to support using a Custom
> AltKerberos DelegationToken custom class.
> Changes to: TimelineAuthenticationFilterInitializer.class
> {code}
> String authType = filterConfig.get(AuthenticationFilter.AUTH_TYPE);
> LOG.info("AuthType Configured: "+authType);
> if (authType.equals(PseudoAuthenticationHandler.TYPE)) {
> filterConfig.put(AuthenticationFilter.AUTH_TYPE,
> PseudoDelegationTokenAuthenticationHandler.class.getName());
> LOG.info("AuthType: PseudoDelegationTokenAuthenticationHandler");
> } else if (authType.equals(KerberosAuthenticationHandler.TYPE) ||
> (UserGroupInformation.isSecurityEnabled() &&
> conf.get("hadoop.security.authentication").equals(KerberosAuthenticationHandler.TYPE)))
> {
> if (!(authType.equals(KerberosAuthenticationHandler.TYPE))) {
> filterConfig.put(AuthenticationFilter.AUTH_TYPE,
> authType);
> LOG.info("AuthType: "+authType);
> } else {
> filterConfig.put(AuthenticationFilter.AUTH_TYPE,
> KerberosDelegationTokenAuthenticationHandler.class.getName());
> LOG.info("AuthType: KerberosDelegationTokenAuthenticationHandler");
> }
> // Resolve _HOST into bind address
> String bindAddress = conf.get(HttpServer2.BIND_ADDRESS);
> String principal =
> filterConfig.get(KerberosAuthenticationHandler.PRINCIPAL);
> if (principal != null) {
> try {
> principal = SecurityUtil.getServerPrincipal(principal, bindAddress);
> } catch (IOException ex) {
> throw new RuntimeException(
> "Could not resolve Kerberos principal name: " + ex.toString(),
> ex);
> }
> filterConfig.put(KerberosAuthenticationHandler.PRINCIPAL,
> principal);
> }
> }
> {code}
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