[EDGEPOD-186] Add Ansible playbook for Aether Edge

Change-Id: I71d73a5a4fdf7e5ccf12df924597af6ab90a68b4
diff --git a/aether-playbook/roles/k8s/tasks/pre-install.yml b/aether-playbook/roles/k8s/tasks/pre-install.yml
new file mode 100644
index 0000000..b0b2bfa
--- /dev/null
+++ b/aether-playbook/roles/k8s/tasks/pre-install.yml
@@ -0,0 +1,70 @@
+# Copyright 2020-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+- name: Run "apt update"
+  apt:
+    update_cache: yes
+
+- name: Install ntp
+  apt: name=ntp state=present
+  when: ntp_enabled | bool
+  tags: ntp
+
+- name: Configure ntp file
+  template: src=etc/ntp.conf.j2 dest=/etc/ntp.conf
+  when: ntp_enabled | bool
+  notify: restart ntp
+  tags: ntp
+
+- name: Start the ntp service
+  service: name=ntp state=started enabled=yes
+  when: ntp_enabled | bool
+  tags: ntp
+
+- name: Set timezone to {{ ntp_timezone }}
+  timezone:
+    name: "{{ ntp_timezone }}"
+  when: ntp_enabled | bool
+  tags: ntp
+
+- name: Remove swapfile from /etc/fstab
+  mount:
+    name: "{{ item }}"
+    fstype: swap
+    state: absent
+  with_items:
+    - swap
+    - none
+  tags: swapoff
+
+- name: Check if swap is enabled
+  command: /sbin/swapon -s
+  register: swapon
+  changed_when: no
+  tags: swapoff
+
+- name: Disable swap
+  command: /sbin/swapoff -a
+  when: swapon.stdout
+  tags: swapoff
+
+- name: Add internal service domains to /etc/hosts
+  become: yes
+  lineinfile:
+    path: /etc/hosts
+    line: "{{ item['ip'] }}\t\t{{ item['name'] }}"
+    state: present
+  with_items: "{{ etc_hosts_entries }}"
+  tags: etc-hosts