support proxies with docker on rhel

inventory/group_vars/all.yml

@@ -123,3 +123,8 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
 #    server master2 10.99.0.27:443
 #    balance roundrobin
 # apiserver_loadbalancer_domain_name: "lb-apiserver.kubernetes.local"
+
+##Set these proxy values in order to update docker daemon to use proxies
+#http_proxy: ""
+#https_proxy: ""
+#no_proxy: ""

roles/docker/tasks/main.yml

@@ -53,6 +53,11 @@
   with_items: "{{ docker_package_info.pkgs }}"
   when: docker_package_info.pkgs|length > 0
 
+- name: allow for proxies on RHEL systems
+  include: rhel-proxies.yml
+  when: ansible_distribution in ["CentOS","RedHat"] and
+        ansible_distribution_major_version >= 7
+
 - meta: flush_handlers
 
 - name: ensure docker service is started and enabled

roles/docker/tasks/rhel-proxies.yml

@@ -0,0 +1,21 @@
+---
+- name: create docker service directory for RHEL family
+  file: path=/etc/systemd/system/docker.service.d state=directory
+  when: ansible_distribution in ["CentOS","RedHat"] and
+        ansible_distribution_major_version >= 7
+
+- name: drop docker environment for RHEL family
+  template:
+    src: http-proxy.conf.j2
+    dest: /etc/systemd/system/docker.service.d/http-proxy.conf
+  when: ansible_distribution in ["CentOS","RedHat"] and
+        ansible_distribution_major_version >= 7
+  register: rheldockerproxy
+
+- name: reload systemctl daemons for RHEL family
+  shell: systemctl daemon-reload
+  when: rheldockerproxy.changed
+
+- name: restart docker for RHEL family
+  service: name=docker state=restarted
+  when: rheldockerproxy.changed

roles/docker/templates/http-proxy.conf.j2

@@ -0,0 +1,3 @@
+[Service]
+
+Environment={% if http_proxy %}"HTTP_PROXY={{ http_proxy }}"{% endif %} {% if https_proxy %}"HTTPS_PROXY={{ https_proxy }}"{% endif %} {% if no_proxy %}"NO_PROXY={{ no_proxy }}"{% endif %}