Kubernetes Setup Using Ansible and Vagrant

master-playbook.yml

---
- hosts: all
  become: true
  tasks:
    - name: Install packages that allow apt to be used over HTTPS
      apt:
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - apt-transport-https
        - ca-certificates
        - curl
        - gnupg-agent
        - software-properties-common

    - name: Add an apt signing key for Docker
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    - name: Add apt repository for stable version
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
        state: present

    - name: Install docker and its dependecies
      apt: 
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - docker-ce 
        - docker-ce-cli 
        - containerd.io
      notify:
        - docker status

    - name: Add vagrant user to docker group
      user:
        name: vagrant
        group: docker

    - name: Remove swapfile from /etc/fstab
      mount:
        name: "{{ item }}"
        fstype: swap
        state: absent
      with_items:
        - swap
        - none

    - name: Disable swap
      command: swapoff -a
      when: ansible_swaptotal_mb > 0

    - name: Add an apt signing key for Kubernetes
      apt_key:
        url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
        state: present

    - name: Adding apt repository for Kubernetes
      apt_repository:
        repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
        state: present
        filename: kubernetes.list

    - name: Install Kubernetes binaries
      apt: 
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
          - kubelet 
          - kubeadm 
          - kubectl

    - name: Configure node ip
      lineinfile:
        create: yes
        path: /etc/default/kubelet
        line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}

    - name: Restart kubelet
      service:
        name: kubelet
        daemon_reload: yes
        state: restarted

    - name: Initialize the Kubernetes cluster using kubeadm
      command: kubeadm init --apiserver-advertise-address="192.168.50.10" --apiserver-cert-extra-sans="192.168.50.10"  --node-name k8s-master --pod-network-cidr=192.168.0.0/16

    - name: Setup kubeconfig for vagrant user
      command: "{{ item }}"
      with_items:
      - mkdir -p /home/vagrant/.kube
      - cp -i /etc/kubernetes/admin.conf /home/vagrant/.kube/config
      - chown vagrant:vagrant /home/vagrant/.kube/config

    - name: Install calico pod network
      become: false
      command: kubectl apply -f https://docs.projectcalico.org/v3.9/manifests/calico.yaml

    - name: Generate join command
      command: kubeadm token create --print-join-command
      register: join_command

    - name: Copy join command to local file
      become: false
      local_action: copy content="{{ join_command.stdout_lines[0] }}" dest="./join-command"

  handlers:
    - name: docker status
      service: name=docker state=started

node-playbook.yml

---
- hosts: all
  become: true
  tasks:
    - name: Install packages that allow apt to be used over HTTPS
      apt:
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - apt-transport-https
        - ca-certificates
        - curl
        - gnupg-agent
        - software-properties-common

    - name: Add an apt signing key for Docker
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    - name: Add apt repository for stable version
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
        state: present

    - name: Install docker and its dependecies
      apt: 
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - docker-ce 
        - docker-ce-cli 
        - containerd.io
      notify:
        - docker status

    - name: Add vagrant user to docker group
      user:
        name: vagrant
        group: docker

    - name: Remove swapfile from /etc/fstab
      mount:
        name: "{{ item }}"
        fstype: swap
        state: absent
      with_items:
        - swap
        - none

    - name: Disable swap
      command: swapoff -a
      when: ansible_swaptotal_mb > 0

    - name: Add an apt signing key for Kubernetes
      apt_key:
        url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
        state: present

    - name: Adding apt repository for Kubernetes
      apt_repository:
        repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
        state: present
        filename: kubernetes.list

    - name: Install Kubernetes binaries
      apt: 
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
          - kubelet 
          - kubeadm 
          - kubectl

    - name: Configure node ip
      lineinfile:
        create: yes
        path: /etc/default/kubelet
        line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}

    - name: Restart kubelet
      service:
        name: kubelet
        daemon_reload: yes
        state: restarted

    - name: Copy the join command to server location
      copy: src=join-command dest=/tmp/join-command.sh mode=0777

    - name: Join the node to cluster
      command: sh /tmp/join-command.sh

  handlers:
    - name: docker status
      service: name=docker state=started

Vagrantfile

IMAGE_NAME = "bento/ubuntu-16.04"
N = 2

Vagrant.configure("2") do |config|
    config.ssh.insert_key = false

    config.vm.provider "virtualbox" do |v|
        v.memory = 1024
        v.cpus = 2
    end
      
    config.vm.define "k8s-master" do |master|
        master.vm.box = IMAGE_NAME
        master.vm.network "private_network", ip: "192.168.50.10"
        master.vm.hostname = "k8s-master"
        master.vm.provision "ansible" do |ansible|
            ansible.playbook = "kubernetes-setup/master-playbook.yml"
            ansible.extra_vars = {
                node_ip: "192.168.50.10",
            }
        end
    end

    (1..N).each do |i|
        config.vm.define "node-#{i}" do |node|
            node.vm.box = IMAGE_NAME
            node.vm.network "private_network", ip: "192.168.50.#{i + 10}"
            node.vm.hostname = "node-#{i}"
            node.vm.provision "ansible" do |ansible|
                ansible.playbook = "kubernetes-setup/node-playbook.yml"
                ansible.extra_vars = {
                    node_ip: "192.168.50.#{i + 10}",
                }
            end
        end
    end
end

fatal: [k8s-master]: FAILED! => {"changed": false, "msg": "Failed to update apt cache: W:The repository 'http://archive.ubuntu.com/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:The repository 'http://archive.ubuntu.com/ubuntu xenial-updates Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:The repository 'http://archive.ubuntu.com/ubuntu xenial-backports Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:The repository 'http://security.ubuntu.com/ubuntu xenial-security Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:Failed to fetch https://download.docker.com/linux/ubuntu/dists/xenial/InRelease Failed to connect to download.docker.com port 443: No route to host, W:Failed to fetch https://apt.kubernetes.io/dists/kubernetes-xenial/InRelease Failed to connect to apt.kubernetes.io port 443: No route to host, E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-backports/restricted/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8001::24). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8001::24 80], E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/main/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8001::24). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8001::24 80], E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8001::24). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8001::24 80], E:Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/main/binary-amd64/Packages Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::18). - connect (101: Network is unreachable) [IP: 2001:67c:1562::18 80], W:Some index files failed to download. They have been ignored, or old ones used instead."}