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https://issues.apache.org/jira/browse/AMBARI-15395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shantanu Mundkur reassigned AMBARI-15395:
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Assignee: Shantanu Mundkur
> Enhance blueprint support for using references
> ----------------------------------------------
>
> Key: AMBARI-15395
> URL: https://issues.apache.org/jira/browse/AMBARI-15395
> Project: Ambari
> Issue Type: Story
> Components: ambari-server
> Affects Versions: 2.4.0
> Reporter: Shantanu Mundkur
> Assignee: Shantanu Mundkur
>
> An exported blueprint should provide ready portability i.e. an exported
> blueprint be usable without changes to deploy another cluster. Some elements
> that are masked or omitted use tokens or placeholders. These have been called
> references in previous Jiras. A reference follow some convention that
> indicates that it is a reference by using a keyword and a pattern e.g.
> ReferenceName:configType:configVersion:propertyName
> References would be a good indicators of properties that user could choose to
> customize before deploying the cluster. It could also indicate the need for a
> "global" default for that property in the cluster template. Examples:
> - Passwords
> - Hostnames
> - External databases
> Currently Ambari has a concept of SECRET references. E.g.
> SECRET:hive-site:2:hive.server2.keystore.password
> These are used for masking the password when a blueprint is exported and the
> reference itself is not exported. It would be useful to have an reference
> exported as long as it is processed appropriately during deployment.
> Similar to the secret reference, for hostnames in a one could have,
> HOST:kerberos-env:-1:kdc_host
> and so forth.
> For any reference, in the cluster template there would be a corresponding
> property that would be used for substituting a value for the reference during
> deployment if the registered blueprint had such references. Currently such
> behavior is used if a property of type password is not specified
> (default_password). Such references could be used to tag properties to flag
> them to be the ones that users must customize or include in the cluster
> template. They can also serve a way to annotate/comment parts of the
> blueprint JSON.
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