k8scluster.yaml

- hosts: localhost
  gather_facts: yes
  tasks:
   - name: replace line
     lineinfile:
       dest: /etc/ansible/ansible.cfg
       line: 'command_warnings = False'

   - name: Add an Kubernetes apt signing key for Ubuntu
     when: "ansible_distribution == 'Ubuntu'"
     apt_key:
       url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
       state: present

   - name: Adding Kubernetes apt repository for Ubuntu
     when: "ansible_distribution == 'Ubuntu'"
     apt_repository:
      repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
      state: present
      filename: kubernetes

   - name: install kubernetes components for Ubuntu
     when: "ansible_distribution == 'Ubuntu'"
     apt:
       name: ['apt-transport-https', 'curl', 'ca-certificates', 'gnupg-agent' ,'software-properties-common', 'kubelet=1.15.3-00', 'kubeadm=1.15.3-00', 'kubectl=1.15.3-00', 'git']
       state: present

   - name: Creating a Kubernetes repository file for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS']"
     file:
      path: /etc/yum.repos.d/kubernetes.repo
      state: touch

   - name: Adding repository details in Kubernetes repo file for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS']"
     blockinfile:
      path: /etc/yum.repos.d/kubernetes.repo
      block: |
       [kubernetes]
       name=Kubernetes
       baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
       enabled=1
       gpgcheck=0
       repo_gpgcheck=0
       gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
         https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

   - name: Installing required packages for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS']"
     yum:
      name: ['bind-utils', 'yum-utils', 'device-mapper-persistent-data', 'lvm2', 'telnet', 'kubelet-1.15.5', 'kubeadm-1.15.5', 'kubectl-1.15.5', 'firewalld', 'curl']
      state: present

   - name: Validate whether Kubernetes cluster installed
     shell: kubectl cluster-info
     register: k8sup
     ignore_errors: yes

   - name: Add Docker GPG key for Ubuntu
     when: "ansible_distribution == 'Ubuntu' and 'running' not in k8sup.stdout"
     apt_key: url=https://download.docker.com/linux/ubuntu/gpg

   - name: Add Docker APT repository for Ubuntu
     when: "ansible_distribution == 'Ubuntu' and 'running' not in k8sup.stdout"
     apt_repository:
       repo: deb [arch=amd64] https://download.docker.com/linux/{{ansible_distribution|lower}} {{ansible_distribution_release}} stable

   - name: Install Docker-CE Engine on Ubuntu
     when: " ansible_distribution == 'Ubuntu' and 'running' not in k8sup.stdout"
     become: root
     apt:
       name: [ 'docker-ce=5:19.03.1~3-0~ubuntu-bionic' ]
       update_cache: yes

   - name: "Configuring Docker-CE repo for RHEL/CentOS"
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     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 Engine on RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     args:
       warn: false
     shell: yum install docker -y

   - name: SetEnforce for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     ignore_errors: yes
     command: "setenforce 0"

   - name: SELinux for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     args:
       warn: false
     command: sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux

   - name: Enable Firewall Service for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     service:
       name: firewalld
       state: started
       enabled: yes
     ignore_errors: yes

   - name: Allow Network Ports in Firewalld for RHEL/CentOS
     when: "ansible_distribution in ['RedHat', 'CentOS'] and 'running' not in k8sup.stdout"
     firewalld:
      port: "{{ item }}"
      state: enabled
      permanent: yes
      immediate: yes
     with_items:
       - "6443/tcp"
       - "10250/tcp"

   - name: Remove swapfile from /etc/fstab
     when: "'running' not in k8sup.stdout"
     mount:
       name: "{{ item }}"
       fstype: swap
       state: absent
     with_items:
      - swap
      - none

   - name: Disable swap
     when: "'running' not in k8sup.stdout"
     command: swapoff -a

   - name: Starting and enabling the required services
     when: "'running' not in k8sup.stdout"
     service:
      name: "{{ item }}"
      state: started
      enabled: yes
     ignore_errors: yes
     with_items:
      - docker
      - kubelet

   - name: Reset Kubernetes component
     when: "'running' not in k8sup.stdout"
     shell: "kubeadm reset --force"

   - name: Remove etcd directory
     when: "'running' not in k8sup.stdout"
     file:
       path: "/var/lib/etcd"
       state: absent

   - name: Initialize the Kubernetes cluster using kubeadm
     when: "'running' not in k8sup.stdout"
     command: kubeadm init --pod-network-cidr=192.168.0.0/16

   - name: Create kube directory
     when: "'running' not in k8sup.stdout"
     file:
      path: $HOME/.kube
      state: directory

   - name: Copy kubeconfig to home
     when: "'running' not in k8sup.stdout"
     copy:
       src:  /etc/kubernetes/admin.conf
       dest:  $HOME/.kube/config
       mode: '0644'

   - name: Install networking plugin to kubernetes cluster
     when: "'running' not in k8sup.stdout"
     command: kubectl apply -f https://docs.projectcalico.org/v3.9/manifests/calico.yaml

   - name: Taint the Kubernetes Control Plane node
     when: "'running' not in k8sup.stdout"
     command: kubectl taint nodes --all node-role.kubernetes.io/master-

   - name: "Check if Helm is installed"
     shell: command -v helm >/dev/null 2>&1
     register: helm_exists
     ignore_errors: yes

   - name: "Install Helm"
     command: "{{ item }}"
     args:
       warn: false
     with_items:
       - curl -O https://get.helm.sh/helm-v2.14.3-linux-amd64.tar.gz
       - tar -xvzf helm-v2.14.3-linux-amd64.tar.gz
       - cp linux-amd64/helm /usr/local/bin/
       - cp linux-amd64/helm /usr/bin/
       - rm -rf helm-v2.14.3-linux-amd64.tar.gz linux-amd64

     when: helm_exists.rc > 0

   - name: "Tiller RBAC configuration"
     when: "'running' not in k8sup.stdout"
     command: "{{ item }}"
     args:
       warn: false
     with_items:
       - kubectl create serviceaccount -n kube-system tiller
       - kubectl create clusterrolebinding tiller-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:tiller

   - name: "Initialize Helm"
     when: "'running' not in k8sup.stdout"
     shell: "{{ item }}"
     with_items:
       - helm init --service-account tiller
       - sleep 5
       - kubectl --namespace kube-system patch deploy tiller-deploy -p '{"spec":{"template":{"spec":{"serviceaccount":"tiller"}}}}'


   - name: "Install Kubernetes Dashboard"
     when: "'running' not in k8sup.stdout"
     shell: "{{ item }}"
     with_items:
       - git clone https://github.com/angudadevops/k8s_addons.git
       - cd k8s_addons/dashboard && bash dashboard.sh