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

roles/download/defaults/main.yml

@@ -60,6 +60,8 @@ hyperkube_image_repo: "quay.io/coreos/hyperkube"
 hyperkube_image_tag: "{{ kube_version }}_coreos.0"
 pod_infra_image_repo: "gcr.io/google_containers/pause-amd64"
 pod_infra_image_tag: "{{ pod_infra_version }}"
+install_socat_image_repo: "xueshanf/install-socat"
+install_socat_image_tag: "latest"
 netcheck_version: "v1.0"
 netcheck_agent_img_repo: "quay.io/l23network/k8s-netchecker-agent"
 netcheck_agent_tag: "{{ netcheck_version }}"
@@ -194,6 +196,11 @@ downloads:
     repo: "{{ pod_infra_image_repo }}"
     tag: "{{ pod_infra_image_tag }}"
     sha256: "{{ pod_infra_digest_checksum|default(None) }}"
+  install_socat:
+    container: true
+    repo: "{{ install_socat_image_repo }}"
+    tag: "{{ install_socat_image_tag }}"
+    sha256: "{{ install_socat_digest_checksum|default(None) }}"
   nginx:
     container: true
     repo: "{{ nginx_image_repo }}"

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']