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https://issues.apache.org/jira/browse/AMBARI-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sumit Mohanty updated AMBARI-1426:
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Attachment: Custom_Action_Support_Using_Ambari-Design.docx
> Create cluster level Custom Action support
> ------------------------------------------
>
> Key: AMBARI-1426
> URL: https://issues.apache.org/jira/browse/AMBARI-1426
> Project: Ambari
> Issue Type: Bug
> Affects Versions: 1.2.3
> Reporter: Sumit Mohanty
> Assignee: Sumit Mohanty
> Fix For: 1.5.0
>
> Attachments: Custom_Action_Support_Using_Ambari-Design.docx,
> Custom_Action_Support_Using_Ambari-Design.docx
>
>
> While managing an HDP cluster, the admin may need to execute custom scripts
> etc. to perform house-keeping operations. Ambari support for smoke test can
> be viewed as one such operation, which has a first class support in Ambari.
> It is conceivable that in future releases several such operations need to be
> supported by Ambari. Some such requirements are:
> * Validate Kerberos settings
> * Perform metadata check/backup (e.g. fsck) prior to upgrade
> * Dump the list of datanodes
> Rather than designing each of these capabilities in a one-off fashion, it is
> useful to develop an infrastructure to execute such operations and then
> define new operations based on the infrastructure.
> h3. Custom Action Definition
> A custom action is a python (_can be extended to other scripting language
> including puppet_) script that can be executed to perform any management
> activity on a cluster. The relevant aspects of a custom action are:
> *Alias*: A friendly name of a custom action. E.g. “Validate_Kerberos_Setting”
> *Definition*: The definition of the custom action. This is essentially a
> script that will get executed.
> *Input*: A set of name-value pairs that are the input to the script. E.g.
> “principal=a...@abc.com”.
> *Context*: The default context that is available to all custom actions. The
> context will include.
> * Cluster name
> * Host name
> * Service name
> * Component name
> *Target*: The target node(s)/host(s), where the custom action will be
> executed. Optionally, an action may explicitly specify the component on which
> it can be executed – e.g. NAMENODE, in which case a host that has the
> component mapped will be randomly selected.
> *MaxExecutionTime*: The maximum execution time allowed for these class of
> custom actions. Ambari will enforce an absolution maximum time limit for all
> custom actions
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