Upgrade to kubeadm (#1667)

* Enable upgrade to kubeadm

* fix kubedns upgrade

* try upgrade route

* use init/upgrade strategy for kubeadm and ignore kubedns svc

* Use bin_dir for kubeadm

* delete more secrets

* fix waiting for terminating pods

* Manually enforce kube-proxy for kubeadm deploy

* remove proxy. update to kubeadm 1.8.0rc1

roles/download/defaults/main.yml

@@ -20,7 +20,7 @@ download_always_pull: False
 # Versions
 kube_version: v1.7.5
 # Change to kube_version after v1.8.0 release
-kubeadm_version: "v1.8.0-beta.1"
+kubeadm_version: "v1.8.0-rc.1"
 etcd_version: v3.2.4
 # TODO(mattymo): Move calico versions to roles/network_plugins/calico/defaults
 # after migration to container download
@@ -37,7 +37,7 @@ pod_infra_version: 3.0
 kubeadm_download_url: "https://storage.googleapis.com/kubernetes-release/release/{{ kubeadm_version }}/bin/linux/amd64/kubeadm"
 
 # Checksums
-kubeadm_checksum: "ddd5949699d6bdbc0b90b379e7e534f137b1058db1acc8f26cc54843f017ffbf"
+kubeadm_checksum: "8f6ceb26b8503bfc36a99574cf6f853be1c55405aa31669561608ad8099bf5bf"
 
 # Containers
 etcd_image_repo: "quay.io/coreos/etcd"
@@ -123,7 +123,7 @@ downloads:
     container: true
     repo: "{{ etcd_image_repo }}"
     tag: "{{ etcd_image_tag }}"
-    sha256: "{{etcd_digest_checksum|default(None)}}"
+    sha256: "{{ etcd_digest_checksum|default(None) }}"
   kubeadm:
     version: "{{ kubeadm_version }}"
     dest: "kubeadm"