[jira] [Created] (HDDS-2895) Generate only the required keytabs for docker based secure tests

["Marton Elek (Jira)" <ji...@apache.org>]

Marton Elek created HDDS-2895:
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             Summary: Generate only the required keytabs for docker based secure tests
                 Key: HDDS-2895
                 URL: https://issues.apache.org/jira/browse/HDDS-2895
             Project: Hadoop Distributed Data Store
          Issue Type: Improvement
            Reporter: Marton Elek


We have acceptance tests with the help of docker/docker-compose where we generate the keytab files on the fly with the help of a lightweight (unsecure) REST endpoint.

But this generation can be very slow especially when the DNS is slow. When I start a VPN the secure cluster can't be started in the 90 sec period. (>100 keytabs are generated and one keytab generation is ~5 sec).

The solutions is to generate only the *required* keystabs in each of the containers.

Instead of request all the possible keytabs in the *generic* docker-config:
{code:java}
KERBEROS_KEYTABS=dn om scm HTTP testuser testuser2 s3g {code}
We can defined the required keytabs per service (in docker-compose.yaml)
{code:java}
environment:
  KERBEROS_KEYTABS=scm HTTP{code}
With this approach ~20 keytab file will be generated instead of >100 and the secure tests will be significant faster.



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