Add socat for CoreOS when using host deploy kubelet (#1575)

roles/kubernetes/node/meta/main.yml

@@ -6,6 +6,10 @@ dependencies:
   - role: download
     file: "{{ downloads.pod_infra }}"
     tags: [download, kubelet]
+  - role: download
+    file: "{{ downloads.install_socat }}"
+    tags: [download, kubelet]
+    when: ansible_os_family in ['CoreOS', 'Container Linux by CoreOS']
   - role: kubernetes/secrets
     tags: k8s-secrets
   - role: download
@@ -33,4 +37,4 @@ dependencies:
     tags: [download, dnsmasq]
   - role: download
     file: "{{ downloads.kubednsautoscaler }}"
-    tags: [download, dnsmasq]
+    tags: [download, dnsmasq]

roles/kubernetes/node/tasks/install_host.yml

@@ -8,3 +8,9 @@
   changed_when: false
   tags: [hyperkube, upgrade]
   notify: restart kubelet
+
+- name: install | Copy socat wrapper for Container Linux
+  command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/opt/bin {{ install_socat_image_repo }}:{{ install_socat_image_tag }}"
+  args:
+    creates: "{{ bin_dir }}/socat"
+  when: ansible_os_family in ['CoreOS', 'Container Linux by CoreOS']