Add proxy support to CRI-O service (#4607)

* Add proxy support to CRI-O service

The crio.service requires proxy environment variables when it's
deployed behind a corporated network. This change creates a systemd
configuration file when the proxy variables are defined.

* Remove unnecesary crio's tasks

roles/container-engine/cri-o/tasks/main.yaml

@@ -54,6 +54,7 @@
   with_items:
     - /etc/crio
     - /etc/containers
+    - /etc/systemd/system/crio.service.d
   file:
     path: "{{ item }}"
     state: directory
@@ -64,6 +65,7 @@
     state: present
   when: not is_ostree
   with_items: "{{ crio_packages }}"
+  notify: restart crio
 
 - name: Check if already installed
   stat:
@@ -110,6 +112,7 @@
     dest: /etc/containers/mounts.conf
   when:
     - ansible_os_family == 'RedHat'
+  notify: restart crio
 
 - name: Create directory for oci hooks
   file:
@@ -118,12 +121,9 @@
     owner: root
     mode: 0755
 
-- name: Reload systemd daemon
-  systemd:
-    daemon_reload: yes
-
-- name: Install cri-o service
-  service:
-    name: "{{ crio_service }}"
-    enabled: yes
-    state: restarted
+- name: Write cri-o proxy drop-in
+  template:
+    src: http-proxy.conf.j2
+    dest: /etc/systemd/system/crio.service.d/http-proxy.conf
+  notify: restart crio
+  when: http_proxy is defined or https_proxy is defined