Add docker support for openEuler linux (#9498)

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

docs/openeuler.md

 # OpenEuler
 
-[OpenEuler](https://www.openeuler.org/en/) Linux currently only supports the containerd runtime.
+[OpenEuler](https://www.openeuler.org/en/) Linux is supported with docker and containerd runtimes.
 
 **Note:** that OpenEuler Linux is not currently covered in kubespray CI and
 support for it is currently considered experimental.

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

@@ -11,6 +11,13 @@
   set_fact:
     is_ostree: "{{ ostree.stat.exists }}"
 
+- name: set docker_version for openEuler
+  set_fact:
+    docker_version: '19.03'
+  when: ansible_distribution == "openEuler"
+  tags:
+    - facts
+
 - name: gather os specific variables
   include_vars: "{{ item }}"
   with_first_found:

roles/kubernetes/preinstall/tasks/0040-set_facts.yml

@@ -6,11 +6,11 @@
   tags:
     - facts
 
-- name: Set os_family fact for Kylin Linux Advanced Server
+- name: Set os_family fact for Kylin Linux Advanced Server and openEuler
   set_fact:
     ansible_os_family: "RedHat"
     ansible_distribution_major_version: "8"
-  when: ansible_distribution == "Kylin Linux Advanced Server"
+  when: ansible_distribution in ["Kylin Linux Advanced Server", "openEuler"]
   tags:
     - facts