Update

roles/nginx_load_balancer/.travis.yml

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+---
+language: python
+python: "2.7"
+
+# Use the new container infrastructure
+sudo: false
+
+# Install ansible
+addons:
+  apt:
+    packages:
+    - python-pip
+
+install:
+  # Install ansible
+  - pip install ansible
+
+  # Check ansible version
+  - ansible --version
+
+  # Create ansible.cfg with correct roles_path
+  - printf '[defaults]\nroles_path=../' >ansible.cfg
+
+script:
+  # Basic role syntax check
+  - ansible-playbook tests/test.yml -i tests/inventory --syntax-check
+
+notifications:
+  webhooks: https://galaxy.ansible.com/api/v1/notifications/

roles/nginx_load_balancer/README.md

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+NGINX Load Balancer
+=========
+Documentation: https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/
+-------------
+Role to configure nginx load balancer:
+
+- Install, start, and enable nginx
+- Create config.d directory
+- Add extra config directory to main config
+- Create K8s master/control hosts load balancer config
+- reload nginx
+
+Manual Commands to match this playbook
+-------------
+These assume you're running sudo. 
+
+Install nginx:
+- apt-get install nginx
+
+Start and enable nginx:
+- systemctl start nginx
+- systemctl enable nginx
+
+Create /etc/nginx/tcpconf.d directory:
+- mkdir /etc/nginx/tcpconf.d
+
+Add include statement to /etc/nginx/nginx.conf:
+- echo "include /etc/nginx/tcpconf.d/*" >> /etc/nginx/nginx.conf
+
+Create /etc/nginx/tcpconf.d/kubernetes.conf:
+- vi /etc/nginx/tcpconf.d/kubernetes.conf
+- Take the file from the "templates" file in this role directory named "kubernetes_conf.j2" and paste it into /etc/nginx/tcpconf.d/kubernetes.conf
+- Hit ESC and type :wq to write and quit the file
+
+Reload nginx:
+- nginx -s reload
+
+Requirements
+------------
+
+- A Sudo user on your hosts you wish to apply this to
+- An internet connection or nginx and required dependencies
+
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+An optional section for the role authors to include contact information, or a website (HTML is not allowed).

roles/nginx_load_balancer/defaults/main.yml

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+---
+# defaults file for nginx_load_balancer

roles/nginx_load_balancer/handlers/main.yml

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+---
+# handlers file for nginx_load_balancer

roles/nginx_load_balancer/meta/main.yml

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+galaxy_info:
+  author: your name
+  description: your role description
+  company: your company (optional)
+
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+
+  # Choose a valid license ID from https://spdx.org - some suggested licenses:
+  # - BSD-3-Clause (default)
+  # - MIT
+  # - GPL-2.0-or-later
+  # - GPL-3.0-only
+  # - Apache-2.0
+  # - CC-BY-4.0
+  license: license (GPL-2.0-or-later, MIT, etc)
+
+  min_ansible_version: 2.9
+
+  # If this a Container Enabled role, provide the minimum Ansible Container version.
+  # min_ansible_container_version:
+
+  #
+  # Provide a list of supported platforms, and for each platform a list of versions.
+  # If you don't wish to enumerate all versions for a particular platform, use 'all'.
+  # To view available platforms and versions (or releases), visit:
+  # https://galaxy.ansible.com/api/v1/platforms/
+  #
+  # platforms:
+  # - name: Fedora
+  #   versions:
+  #   - all
+  #   - 25
+  # - name: SomePlatform
+  #   versions:
+  #   - all
+  #   - 1.0
+  #   - 7
+  #   - 99.99
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.
+  

roles/nginx_load_balancer/tasks/main.yml

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+---
+# tasks file for nginx_load_balancer
+
+# (Recommended) If you have plans to upgrade this single control-plane kubeadm cluster to high 
+# availability you should specify the --control-plane-endpoint to set 
+# the shared endpoint for all control-plane nodes.
+# Such an endpoint can be either a DNS name or an IP address of a load-balancer
+
+# Install nginx
+- name: Install nginx
+  apt:
+    pkg: nginx
+  tags:
+    - nginx
+
+# Start and Enable nginx
+- name: Start and Enable nginx
+  service:
+    name: nginx
+    state: started
+    enabled: yes
+  tags:
+    - nginx
+
+# Create a directory for extra nginx configs. This allows for easy management of configs
+- name: Create /etc/nginx/tcpconf.d directory
+  file:
+    path: /etc/nginx/tcpconf.d
+    state: directory
+  tags:
+    - nginx
+
+# Adding this line at the end of the file will ensure nginx loads configs in the tcpconf.d directory on startup
+- name: Add include statement to /etc/nginx/nginx.conf
+  lineinfile:
+    path: /etc/nginx/nginx.conf
+    line: "include /etc/nginx/tcpconf.d/*;"
+    state: present
+    backup: yes
+  tags:
+    - nginx
+
+# This config will build an upstream telling the nginx load balancer what servers to load balance
+- name: Create /etc/nginx/tcpconf.d/kubernetes.conf
+  template:
+    src: kubernetes_conf.j2
+    dest: /etc/nginx/tcpconf.d/kubernetes.conf
+  tags:
+    - nginx
+
+- name: Reload nginx
+  command: nginx -s reload
+  tags:
+    - nginx
+
+# Add firewall port for apiserver
+- name: Add firewall ports
+  firewalld:
+    port: "{{ item.port }}"
+    permanent: yes
+    state: enabled
+  with_items:
+    - { port: 6443/tcp }
+    - { port: 8472/tcp }
+    - { port: 8080/tcp }
+  tags:
+    - firewalld
+
+

roles/nginx_load_balancer/templates/kubernetes_conf.j2

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+# Define an upstream using the master nodes as the upstream nodes
+# Stream defines a top level stream block
+# Define each server and the port that server listens on for traffic
+# "upstream kubernetes" defines a server group
+# "proxy_pass" refers to the the "upstream <server group>", in this case "upstream kubernetes"
+# I have commented out master02, as I do not have that in my cluster yet
+
+stream {
+    upstream kubernetes {
+        server 192.168.50.240:6443;
+        #server master02:6443;
+    }
+
+    server {
+        listen 6443;
+        listen 443;
+        proxy_pass kubernetes;
+    }
+}

roles/nginx_load_balancer/tests/inventory

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+localhost
+

roles/nginx_load_balancer/tests/test.yml

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+---
+- hosts: localhost
+  remote_user: root
+  roles:
+    - nginx_load_balancer

roles/nginx_load_balancer/vars/main.yml

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+---
+# vars file for nginx_load_balancer