Pike-1 release notes

This adds release notes for Pike-1 release.

Change-Id: Ie8a4820c743e62046f767e87c81ff79cb9882b79

releasenotes/notes/clean-actions-for-cluster-node-438ca5268e7fd258.yaml

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+---
+features:
+  - |
+    When a cluster or a node is deleted, the action records associated with
+    them are now automatically deleted from database.

releasenotes/notes/cluster-check-interval-b01e8140cc83760e.yaml

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+---
+features:
+  - |
+    A new configuration option check_interval_max is added (default=3600) for
+    cluster health check intervals.

releasenotes/notes/db-action-retries-d471fe85b4510afd.yaml

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+---
+other:
+  - |
+    DB layer operations now feature some retries if there are transient errors.

releasenotes/notes/doc-fixes-e60bb1a486f67e0c.yaml

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+---
+fixes:
+  - |
+    Various bug fixes to the user manual and sample profiles/policies.

releasenotes/notes/drop-py34-support-21e20efb9bf0b326.yaml

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+---
+deprecations:
+  - |
+    The support to py3.4 is dropped. Please use py3.5 instead.

releasenotes/notes/fix-action-triggering-e880b02234028315.yaml

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+---
+fixes:
+  - |
+    When an action was marked as RETRY, its status is reset to READY for a
+    reschedule. A bug related to this behavior is now fixed.

releasenotes/notes/fix-cooldown-5082711989ecd536.yaml

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+---
+fixes:
+  - |
+    Fixed immature return from policy cooldown check.

releasenotes/notes/fix-desired-when-omitted-e7ffc0aa72ab8cc9.yaml

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+---
+fixes:
+  - |
+    Fixed a bug related to desired_capacity when creating a cluster. The old
+    behavior was having it default to 1, however, the correct behavior should
+    be having it default to min_size if provided.

releasenotes/notes/fix-dup-of-action-dump-0b95a07adf3ccdba.yaml

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+---
+fixes:
+  - |
+    Fixed a problem related to duplicated event dumps during action execution.

releasenotes/notes/fix-node-status-for-lb-fc7714da09bec2fb.yaml

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+---
+features:
+  - |
+    When a node cannot be added to a load-balancer although desired, or it can
+    not be removed from a load-balancer when requested, the node will be
+    marked as in WARNING status.

releasenotes/notes/fix-recover-trigger-749600f500f7bf4a.yaml

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+---
+fixes:
+  - |
+    Fixed error in the return value of node-check which prevents node-recover
+    from being triggered.

releasenotes/notes/fix-registry-claim-5421dca1ed9b0783.yaml

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+---
+fixes:
+  - |
+    Fixed a problem when claiming a cluster from health registry if service
+    engine is stopped (killed) and restarted quickly.

releasenotes/notes/fix-tag-for-stacks-2ef70be061e80253.yaml

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+---
+fixes:
+  - |
+    Fixed an error in updating stack tags when the stack joins or leaves a
+    cluster.

releasenotes/notes/gc-for-dead-engine-2246c714edc9a2df.yaml

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+---
+features:
+  - |
+    When an engine is detected to be dead, the actions (and the clusters/nodes
+    locked by those actions) are now unlocked. Such clusters and nodes can be
+    operated again.

releasenotes/notes/health-check-interval-b3850c072600bfdf.yaml

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+---
+other:
+  - |
+    Sample health policy file was using 60 seconds as the interval which could
+    be misleading. This has been tuned to 600 seconds.

releasenotes/notes/lb-support-to-recover-8f822d3c2665e225.yaml

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+---
+features:
+  - |
+    The load-balancing policy now properly supports the CLUSTER_RECOVER action
+    and NODE_RECOVER action.

releasenotes/notes/node-check-before-recover-abf887a39ab0d355.yaml

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+---
+features:
+  - |
+    API microversion 1.6 comes with an optional parameter 'check' that tells
+    the engine to perform a health check before doing actual recovery.
+    This applies to both clusters and nodes.

releasenotes/notes/non-operation-recover-cf0f3c0ac62bb0f3.yaml

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+---
+fixes:
+  - |
+    Fixed error that raises when no operation is provided during node health
+    recovery.

releasenotes/notes/nova-az-fccf8db758642d34.yaml

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+---
+fixes:
+  - |
+    Fixed an error introduced by openstacksdk when checking/setting the
+    availability zone of a nova server.

releasenotes/notes/profile-only-update-5cdb3ae46a8139a8.yaml

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+---
+features:
+  - |
+    A new feature is introduced in API microversion 1.6 which permits a cluster
+    update operation to change the profile used by the cluster only without
+    actually updating the existing nodes (if any). The new profile will be used
+    when new nodes are created as members of the cluster.

releasenotes/notes/resize-params-ab4942dc11f05d9a.yaml

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+---
+other:
+  - |
+    The parameter checking for cluster-resize operation is revised so that
+    min_step will be ignored if the ajustment type is not CHANGE_IN_PERCENTAGE.