dependencies.yml

- hosts: all
  become: yes
  tasks:
   - name: Check OS version
     fail:
       msg: "Playbook works on RedHat/CentOS 7 only!!!"
     when: ansible_os_family == "RedHat" and ansible_distribution_major_version|int < 7

   - name: Disable SELinux
     selinux:
       policy: targeted
       state: permissive
     ignore_errors: true

   - name: Stop and disable firewalld.
     service:
       name: firewalld
       state: stopped
       enabled: False
     ignore_errors: true

   - name: Disable swap
     command: "{{item}}"
     with_items:
      - cp /etc/fstab /root/fstab
      - sed -i /"swap"/d /etc/fstab
      - swapoff -a
     ignore_errors: true

   - name: Upgrade kernel
     yum: name=kernel state=latest

   - name: Rebooting ...
     shell: "sleep 3 && reboot"
     async: 1
     poll: 0
     register: rebooting
     ignore_errors: true

   - name: Wait for rebooted servers to come back
     local_action: wait_for host={{ ansible_ssh_host | default(inventory_hostname) }} state=started port=22 delay=30 timeout=300 connect_timeout=15
     when: rebooting|changed

   - name: Add Docker repository
     get_url:
       url: https://download.docker.com/linux/centos/docker-ce.repo
       dest: /etc/yum.repos.d/docker-ce.repo
       mode: 0644

   - name: Install Docker-CE
     yum:
       name: docker-ce
       state: present
       update_cache: true

   - name: Creating Kubernetes repository
     yum_repository:
      name: Kubernetes
      description: Kubernetes YUM repository
      baseurl: https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
      gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
      gpgcheck: yes

   - name: Installing Kubernetes
     yum:
       name: "{{ packages }}"
       state: latest
     vars:
       packages:
       - kubelet
       - kubeadm
       - kubectl

   - name: Start and enable docker.
     service:
       name: docker
       state: started
       enabled: True

   - name: Start and enable kubelet.
     service:
       name: kubelet
       state: started
       enabled: True

   - name: sysctl update-1
     sysctl:
      name: net.bridge.bridge-nf-call-iptables
      value: 1
      state: present

   - name: sysctl update-2
     sysctl:
      name: net.bridge.bridge-nf-call-ip6tables
      value: 1
      state: present