scale down

scale down

```
 ./cluster-autoscaler --v=5 --stderrthreshold=error --logtostderr=true --cloud-provider=aztools --skip-nodes-with-local-storage=false --nodes=1:10:dlws-worker-asg --leader-elect=false --scale-down-enabled=true --kubeconfig=./deploy/kubeconfig.yaml
```

```
I0305 20:20:54.209418    2996 scale_down.go:175] Scale-down calculation: ignoring 2 nodes, that were unremovable in the last 5m0s
I0305 20:20:54.209449    2996 scale_down.go:207] Node harrydevbox-worker01 - utilization 0.883802
I0305 20:20:54.209475    2996 scale_down.go:211] Node harrydevbox-worker01 is not suitable for removal - utilization too big (0.883802)
I0305 20:20:54.209494    2996 scale_down.go:207] Node harrydevbox-worker03 - utilization 0.030000
I0305 20:20:54.209651    2996 static_autoscaler.go:332] harrydevbox-worker03 is unneeded since 2018-03-05 20:10:54.176130596 +0000 UTC m=+71.982770098 duration 10m0.032698796s
I0305 20:20:54.209674    2996 static_autoscaler.go:344] Scale down status: unneededOnly=false lastScaleUpTime=2018-03-05 20:09:43.237722154 +0000 UTC m=+1.044361653 lastScaleDownDeleteTime=2018-03-05 20:09:43.237722247 +0000 UTC m=+1.044361746 lastScaleDownFailTime=2018-03-05 20:09:43.237722343 +0000 UTC m=+1.044361839 schedulablePodsPresent=false isDeleteInProgress=false
I0305 20:20:54.209705    2996 static_autoscaler.go:350] Starting scale down
I0305 20:20:54.209760    2996 scale_down.go:387] harrydevbox-worker03 was unneeded for 10m0.032698796s
I0305 20:20:54.209859    2996 scale_down.go:594] Scale-down: removing empty node harrydevbox-worker03
I0305 20:20:54.210981    2996 factory.go:33] Event(v1.ObjectReference{Kind:"ConfigMap", Namespace:"kube-system", Name:"cluster-autoscaler-status", UID:"24a9192c-20b1-11e8-957b-000d3a1cef06", APIVersion:"v1", ResourceVersion:"4434933", FieldPath:""}): type: 'Normal' reason: 'ScaleDownEmpty' Scale-down: removing empty node harrydevbox-worker03
I0305 20:20:54.384824    2996 delete.go:53] Successfully added toBeDeletedTaint on node harrydevbox-worker03
I0305 20:20:54.385636    2996 az.go:134] Updated config.yaml with new worker node number.
I0305 20:20:54.385653    2996 az.go:172] Executing: ./az_tools.py, [scaledown harrydevbox-worker03]
I0305 20:21:02.095610    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/vendor/k8s.io/client-go/informers/factory.go:86: Watch close - *v1.StorageClass total 0 items received
I0305 20:22:00.114798    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/vendor/k8s.io/client-go/informers/factory.go:86: Watch close - *v1.Node total 158 items received
I0305 20:22:11.200329    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/vendor/k8s.io/client-go/informers/factory.go:86: Watch close - *v1.PersistentVolume total 0 items received
I0305 20:22:14.150692    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/vendor/k8s.io/client-go/informers/factory.go:86: Watch close - *v1beta1.PodDisruptionBudget total 0 items received
I0305 20:22:16.091722    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes/listers.go:212: Watch close - *v1.Node total 149 items received
I0305 20:22:36.235467    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes/listers.go:174: Watch close - *v1.Pod total 5 items received
I0305 20:23:04.166755    2996 reflector.go:428] k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes/listers.go:149: Watch close - *v1.Pod total 0 items received
I0305 20:23:10.243788    2996 az.go:172] Executing: ./az_tools.py, [genconfig]
I0305 20:23:13.390318    2996 az.go:155] Scale down node: harrydevbox-worker03 successfully
I0305 20:23:13.390483    2996 metrics.go:248] Function scaleDown:nodeDeletion took 2m19.180623813s to complete
```