snapshot-restore release notes for 3.3.0 (#75) (#91)

* snapshot-restore release notes

* add link to bp example

release-notes/3.3.0/README.md

@@ -5,3 +5,54 @@
 - `calm get brownfield vms -p <project> -a <account_name>`: Added account cli option, that user should provide if there are multiple accounts in the given project.
 
 - `calm launch bp <bp_name> -b <brownfield_deployments_file_location> -n <app_name>`. Command will launch existing blueprint using brownfield deployments to create brownfield application. Sample file look [here](examples/Brownfield/separate_file_example/brownfield_deployments.py).
+
+# Snapshot Restore
+Adding a snapshot (or restore) config in a profile will auto-generate a profile-level snapshot (or restore) action - Snapshot_<config_name> (or Restore_<config_name>) - which can be run using `calm run action`.
+
+## CLI commands
+- `calm get protection_policies -p <project>`: Lists protection policies corresponding to the project (create/update/delete using DSL not supported in this release)
+
+## Built-in Models
+
+### AppProtection.ProtectionPolicy
+#### Input  Parameters
+- <ins>name</ins>
+- rule_name - name of the protection rule (from `calm get protection_policies`)
+
+### AppProtection.SnapshotConfig
+#### Input Parameters
+- <ins>name</ins>
+- policy (optional) - Protection Policy object
+- rule (optional) - App Protection Rule name
+- target (optional) - corresponding deployment reference (defaults to the first deployment in the profile)
+- restore_config (optional) - Restore Config reference (defaults to the first restore config in the profile)
+- num_of_replicas (optional) - <b>"ONE"</b> or "ALL"
+- description (optional)
+
+### AppProtection.RestoreConfig
+#### Input  Parameters
+- <ins>name</ins>
+- target (optional) - corresponding deployment reference (defaults to the first deployment in the profile)
+- delete_vm_post_restore (optional) - boolean (<b>True</b>)
+- description (optional)
+
+### Profile
+Added `snapshot_configs` and `restore_configs` attributes.
+```
+from calm.dsl.builtins import AppProtection
+class HelloProfile(Profile):
+
+    deployments = [HelloDeployment]
+    restore_configs = [AppProtection.RestoreConfig("Sample Config1")]
+    snapshot_configs = [AppProtection.SnapshotConfig("Sample Config2", policy=AppProtection.ProtectionPolicy("policy1"), restore_config=ref(restore_configs[0]))]
+```
+
+[Sample Blueprint](examples/AHV_CONFIG/snapshot_restore/demo_blueprint.py).
+
+## Running Snapshot and Restore Actions
+Snapshot and Restore Actions can be run like any other profile-level action using `calm run action`.
+```
+calm run action Snapshot_<config_name> -a <app_name>
+calm run action Restore_<config_name> -a <app_name>
+```
+Snapshot name is supplied as a runtime argument while running the snapshot action, and similarly, recovery group can be chosen while running the restore action.