ansible role (tasks/main.yaml) to install k8s on an ubuntu server.

main.yaml

---
- name: "Disable swap"
  command: "swapoff -a"

- name: "Remove swap from fstab"
  lineinfile:
    path: /etc/fstab
    state: absent
    regexp: '^.*(\t| )swap(\t| )sw(\t| ).*$'

- name: "Install necessary key signature checking keys and tools"
  apt:
    name: "{{ item }}"
    state: latest
    update_cache: true
  with_items:
  - ethtool
  - ebtables
  - apt-transport-https

- name: "Add kubernetes's GPG key to apt"
  apt_key:
    url: https://packages.cloud.google.com/apt/doc/apt-key.gpg

- name: "Add kubernetes apt repo"
  apt_repository:
    repo: "deb http://apt.kubernetes.io/ kubernetes-xenial main"
    state: present
    update_cache: yes

- name: "Remove old versions of kubernetes tools"
  apt:
    name: "{{ item.name }}"
    state: absent
  with_items:
  - { name: kubernetes-cni, version: 0.5.1-00 } #Order matters. This must be first
  - { name: kubelet, version: 1.8.13 }
  - { name: kubectl, version: 1.8.13 }
  - { name: kubeadm, version: 1.8.13 }

- name: "Install Kubernetes"
  apt:
    update_cache: true
    name: "{{ item.name }}={{ item.version }}*"
    state: present
  with_items:
  - { name: kubernetes-cni, version: 0.5.1-00 } #Order matters. This must be first
  - { name: kubelet, version: 1.8.13 } #second
  - { name: kubectl, version: 1.8.13 } #third
  - { name: kubeadm, version: 1.8.13 } #forth