refactor to use roles

common.yml

@@ -1,87 +0,0 @@
----
-- hosts: all
-  become: true
-  tasks:
-  - debug: var=hostvars[inventory_hostname]['ansible_default_ipv4']['address']
-  - debug: var=hostvars[inventory_hostname]['ansible_default_ipv6']['address']
-  - name: Install packages that allow apt to be used over HTTPS
-    apt:
-      name: "{{ packages }}"
-      state: present
-      update_cache: yes
-    vars:
-      packages:
-      - aptitude
-      - 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 bionic 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 user to docker group
-    user:
-      name: torma
-      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: Restart kubelet
-    service:
-      name: kubelet
-      daemon_reload: yes
-      state: restarted

hosts

@@ -0,0 +1,5 @@
+[master]
+192.168.122.70
+
+[worker]
+192.168.122.193

kubernetes.yml

@@ -0,0 +1,22 @@
+ ---
+
+- name: Apply common configuration to all nodes
+  hosts: all
+  become: true
+
+  roles:
+    - common
+
+- name: Configure and deploy Kubernetes master
+  hosts: master
+  become: true
+
+  roles:
+    - master
+
+- name: Join workers to Kubernetes cluster
+  hosts: worker
+  become: true
+
+  roles:
+    - worker

master-playbook.yml

@@ -1,120 +0,0 @@
----
-- hosts: all
-  become: true
-  tasks:
-  - debug: var=hostvars[inventory_hostname]['ansible_default_ipv4']['address']
-  - debug: var=hostvars[inventory_hostname]['ansible_default_ipv6']['address']
-  - name: Install packages that allow apt to be used over HTTPS
-    apt:
-      name: "{{ packages }}"
-      state: present
-      update_cache: yes
-    vars:
-      packages:
-      - aptitude
-      - 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 bionic 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 user to docker group
-    user:
-      name: torma
-      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: Restart kubelet
-    service:
-      name: kubelet
-      daemon_reload: yes
-      state: restarted
-
-  - name: Initialize the Kubernetes cluster using kubeadm
-    command: kubeadm init --apiserver-advertise-address="{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
-
-  - name: Creates .kube directory
-    file:
-      path: /home/{{ ansible_user_id }}/.kube
-      state: directory
-
-  - name: Copy files needed for kubectl
-    copy:
-      remote_src: yes
-      src: /etc/kubernetes/admin.conf
-      dest: /home/{{ ansible_user_id }}/.kube/config
-      owner: "{{ ansible_user_id }}"
-      group: users
-
-  - name: set up weave network
-    shell: export KUBECONFIG=/etc/kubernetes/admin.conf && export kubever=$(kubectl version | base64 | tr -d '\n') && kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever"
-    register: weavenet_out
-
-  - name: Generate join command
-    shell: kubeadm token create --print-join-command > /tmp/join_command
-
-  - name: Specifying a destination path
-    fetch:
-      src: /tmp/join_command
-      dest: /tmp/ansible/join_command
-      flat: yes
-
-  handlers:
-    - name: docker status
-      service: name=docker state=started

node-playbook.yml

@@ -1,100 +0,0 @@
----
-- 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 user to docker group
-    user:
-      name: torma
-      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:
-      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

roles/common/handlers/main.yml

@@ -0,0 +1,12 @@
+- name: docker status
+  service:
+    name: docker
+    state: started 
+    enabled: true
+
+- name: restart kubelet
+  service:
+    name: kubelet
+    daemon_reload: yes
+    state: restarted
+    enabled: true

roles/common/tasks/main.yml

@@ -0,0 +1,77 @@
+- name: Install packages that allow apt to be used over HTTPS
+  apt:
+    name: "{{ packages }}"
+    state: present
+    update_cache: yes
+  vars:
+    packages:
+    - aptitude
+    - 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 bionic 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 user to docker group
+  user:
+    name: "{{ ansible_user_id }}"
+    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
+  notify:
+    - restart kubelet

roles/master/tasks/main.yml

@@ -0,0 +1,33 @@
+- name: Initialize the Kubernetes cluster using kubeadm
+  command: kubeadm init --apiserver-advertise-address="{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
+
+- name: Creates .kube directory
+  file:
+    path: /home/{{ ansible_user_id }}/.kube
+    state: directory
+
+- name: Copy files needed for kubectl
+  copy:
+    remote_src: yes
+    src: /etc/kubernetes/admin.conf
+    dest: /home/{{ ansible_user_id }}/.kube/config
+    owner: "{{ ansible_user_id }}"
+    group: users
+
+- name: Set up weave network
+  shell: export KUBECONFIG=/etc/kubernetes/admin.conf && export kubever=$(kubectl version | base64 | tr -d '\n') && kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever"
+  register: weavenet_out
+
+- name: Generate join command
+  command: kubeadm token create --print-join-command
+  register: kubernetes_join_command_result
+  
+- name: Set the kubeadm join command globally.
+  set_fact:
+    kubernetes_join_command: >
+      {{ kubernetes_join_command_result.stdout }}
+      {{ kubernetes_join_command_extra_opts }}
+  when: kubernetes_join_command_result.stdout is defined
+  delegate_to: "{{ item }}"
+  delegate_facts: true
+  with_items: "{{ groups['all'] }}"

roles/worker/tasks/main.yml

@@ -0,0 +1,4 @@
+- name: Join node to Kubernetes master
+  shell: >
+    {{ kubernetes_join_command }}
+    creates=/etc/kubernetes/kubelet.conf