Add proxy support to containerd, improves no_proxy (#5583) (#5830)

* containerd: add proxy support

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* kubespray-defaults: add kube_service_addresses / kube_pods_subnet to no_proxy

CIDR notation in no_proxy is supported by a lot of programs/languages,
including go: https://github.com/golang/go/issues/16704
Without that containerd cannot talk the the API server (kube_apiserver_ip),
but it should not go through an external proxy for the nodes/pods/services

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
(cherry picked from commit 9f2dd09628)

roles/container-engine/containerd/tasks/main.yml

@@ -26,6 +26,18 @@
 
 - include_tasks: containerd_repo.yml
 
+- name: Create containerd service systemd directory if it doesn't exist
+  file:
+    path: /etc/systemd/system/containerd.service.d
+    state: directory
+
+- name: Write containerd proxy drop-in
+  template:
+    src: http-proxy.conf.j2
+    dest: /etc/systemd/system/containerd.service.d/http-proxy.conf
+  notify: restart containerd
+  when: http_proxy is defined or https_proxy is defined
+
 - name: ensure containerd config directory
   file:
     dest: "{{ containerd_cfg_dir }}"

roles/container-engine/containerd/templates/http-proxy.conf.j2

@@ -0,0 +1,2 @@
+[Service]
+Environment={% if http_proxy is defined %}"HTTP_PROXY={{ http_proxy }}"{% endif %} {% if https_proxy is defined %}"HTTPS_PROXY={{ https_proxy }}"{% endif %} {% if no_proxy is defined %}"NO_PROXY={{ no_proxy }}"{% endif %}