Ansible Role: Install Kubernetes

An Ansible role that installs Kubernetes.

This role has been tested on:

• CentOS 7 & 8
• Ubuntu 20.04

Role Variables

The users that will be added to the docker group. This role will also install Docker via the install_docker role. The install_docker role accepts a docker_users variable. The install_k8s role just passes through this varaible.

docker_users: [admin docker_admin]

The kubelet config is automatically added to ~/.kube/config of ansible_user (the user used to run Ansible). Additionally you can set copy_kubectl_config_to_local to have the file copied to you local machine running the Ansible playbook.

# Defaults to false.
copy_kubectl_config_to_local: true

Versions of kubelet, kubeadm, and kubectl are pinned when installed. The version intalled is controlled by these variables.

# Used for all non-RHEL-based distros.
k8s_version: "1.22"
k8s_rhel_version: "1.22.4"

Dependencies

install_docker

Use in requirements.yml

- src: git+https://github.com/shnee/docker-ansible-role.git
  name: install_docker
  version: master

Example Playbook

- hosts: all
  vars:
    # This will set the role to 'master' if the string 'master' exists in the
    # group name. We expect each host to only be in 1 group for this role,
    # therefore we only check the first group.
    - kubernetes_role: >-
        {{  'master' if 'master' in group_names[0] else 'worker' }}
    - docker_users: [admin]
    - copy_kubectl_config_to_local: true
  roles:
    - install_k8s

License

MIT

Author Information

This role was created by shnee.