nutanix镇定：引入快照和恢复动作

This feature introduces a new policy in the Calm ecosystem \u2013 \u201cSnapshot policy\u201d. Snapshot policies provide better governance and controls on what the end-user, typically the consumer and operator roles, can or cannot do when executing snapshot and restore actions. A Snapshot policy is defined by the admin. It contains one or more rules that dictate the behavior of the Snapshots taken from Calm. Typical attributes of a Snapshot policy include:<\/p>

1. Snapshot retention time for both local and remote Snapshots<\/li>\t
2. Remote Snapshot rules \u2013 cluster mapping for remote Snapshots<\/li><\/ol>

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   For example, there could be three Snapshot policies with different expirations for Snapshots.<\/p>

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   In the blueprint editor, the developer can choose to add Snapshot\/Restore tasks on each service. The task config specifies the Snapshot name, choice of whether to Snapshot all replicas or the first replica, and choice of location to store the Snapshot (either local or remote). Snapshot and Restore runbooks are automatically generated in the blueprint and these runbooks can be called from within any custom action created by the blueprint developer. To help with easy access to Snapshot and Restore actions, when the Snapshot and Restore runbooks are created, Calm also generates profile actions for the same.<\/p>

   In a typical scenario, other actions and tasks may have to be chained before\/after the profile actions. Often in a multi-tier app, users might be interested in restarting services after a Restore operation, or gracefully pause\/stop the applications running in the VM before taking any Snapshots.\u00a0 This also gives users the ability to Snapshot the entire application at once by chaining Snapshot actions of all the services in a single profile action.<\/p>

   The Snapshot policy is then bound to the blueprint during application launch. In essence, an application launch will not be blocked due to non-availability of Snapshot policies.<\/p>

   After a successful launch, an operator can take a Snapshot of configured services with a one click day 2 action that can be accessed from the \u201cManage\u201d tab in the application. Users are also able to view all the Snapshots taken from the new \u201cRecovery Points\u201d tab.<\/p>

   This new feature is currently available on the Nutanix\u00ae cloud platform. For more information and the detailed user guide, please refer to the Nutanix Calm documentation.<\/p>

   This post was authored by Sampanna Hegde, Senior Product Manager, Nutanix<\/p><\/div><\/section>

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