added sync changes file

cluster-autoscaler/README.md

@@ -99,6 +99,34 @@ target ETA and the actual releases.
 Additional patch releases may happen outside of the schedule in case of critical
 bugs or vulnerabilities.
 
+# Releases (Gardener/Autoscaler)
+
+Starting with Gardener/Autoscaler v1.20, versioning scheme has changed to match Kubernetes and upstream Autoscaler minor releases exactly. Note that there is a jump of major version as well.
+
+| Kubernetes Version | CA Version | Gardener CA Version | 
+|--------------------|------------|---------------------|
+| 1.30.X             | 1.30.X     | 1.30.X              |
+| 1.29.X             | 1.29.X     | 1.29.X              |
+| 1.28.X             | 1.28.X     | 1.28.X              |
+| 1.27.X             | 1.27.X     | 1.27.X              |
+| 1.26.X             | 1.26.X     | 1.26.X              |
+| 1.25.X             | 1.25.X     | 1.25.X              |
+| 1.24.X             | 1.24.X     | 1.24.X              |
+| 1.23.X             | 1.23.X     | 1.23.X              |
+| 1.22.X             | 1.22.X     | 1.22.X              |
+| 1.21.X             | 1.21.X     | 1.21.X              |
+| 1.20.X             | 1.20.X     | 1.20.X              |
+| 1.20.X             | 1.20.X     | 0.19.X              |
+| 1.19.X             | 1.19.X     | 0.18.X              |
+| 1.19.X             | 1.19.X     | 0.17.X              |
+| 1.19.X             | 1.19.X     | 0.16.X              |
+| 1.19.X             | 1.19.X     | 0.15.X              |
+| 1.19.X             | 1.19.X     | 0.14.X              |
+| 1.19.X             | 1.19.X     | 0.13.X              |
+| 1.19.X             | 1.19.X     | 0.12.X              |
+| 1.19.X             | 1.19.X     | 0.11.X              |
+| 1.12.X             | 1.12.X     | 0.10.X              |
+
 # Notable changes
 
 For CA 1.1.2 and later, please check [release

cluster-autoscaler/SYNC-CHANGES/SYNC_CHANGES-1.30.md

@@ -0,0 +1,33 @@
+<!--- For help refer to https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md?plain=1 as example --->
+
+- [v1.30.1](#v1290)
+    - [Synced with which upstream CA](#synced-with-which-upstream-ca)
+    - [Changes made](#changes-made)
+        - [During merging](#during-merging)
+        - [During vendoring k8s](#during-vendoring-k8s)
+        - [Others](#others)
+
+
+# v1.29.0
+
+
+## Synced with which upstream CA
+
+[v1.30.1](https://github.com/kubernetes/autoscaler/releases/tag/cluster-autoscaler-1.30.1)
+
+## Changes made
+- See general release notes of 1.30.1: https://github.com/kubernetes/autoscaler/releases/tag/cluster-autoscaler-1.30.1
+- New flag added in autoscaling options: `flag.Bool("enable-provisioning-requests", false, "Whether the clusterautoscaler will be handling the ProvisioningRequest CRs.")`.
+- New flag added in autoscaling options: `flag.Bool("frequent-loops-enabled", false, "Whether clusterautoscaler triggers new iterations more frequently when it's needed")`.
+- New interface method `AtomicIncreaseSize` implemented in mcm cloud provider to satisfy interface : `cloudprovider.NodeGroup`.
+
+### During merging
+- import package for `machine-controller-manager-provider-aws` was updated after vendoring latest version.
+- import package for `machine-controller-manager-provider-azure` was updated after vendoring latest version.
+
+### During vendoring k8s
+- mcm-provider-aws  v0.19.2 -> v0.20.0
+- mcm-provider-azure v0.12.1 -> v0.13.0
+
+### Others
+- [Release matrix](../README.md#releases-gardenerautoscaler) of Gardener Autoscaler updated.

cluster-autoscaler/cloudprovider/mcm/mcm_cloud_provider.go

@@ -531,7 +531,7 @@ func (machinedeployment *MachineDeployment) TemplateNodeInfo() (*schedulerframew
 }
 
 func (machinedeployment *MachineDeployment) AtomicIncreaseSize(delta int) error {
-	return nil
+	return cloudprovider.ErrNotImplemented
 }
 
 func buildMachineDeploymentFromSpec(value string, mcmManager *McmManager) (*MachineDeployment, error) {