initial checkin

README.md

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+# Ansible Role: microk8s
+
+## Introduction
+
+This role will install a microk8s cluster to three or more target hosts.
+
+This role requires at least three target hosts, previously deployed. Each
+host should have at least 4GB of RAM and at least a 20GB disk. The hosts
+should also be running Ubuntu LTS, 16.04, 18.04 or 20.04.
+
+It is also assumed that the user running the playbook has SSH key access
+set up for the root user on the target hosts.
+
+
+This playbook can be run using the following command line;
+
+ansible-playbook -i <inventory file> -e "username=<username>" microk8s.yml
+
+ie,
+ansible-playbook -i cluster_inventory.yml -e "username=joe" microk8s.yml
+
+NOTE:
+
+The following variables must be specified in the calling playbook (usually
+done by doing a 'gather_facts' action);
+
+{{ ansible_distribution }}
+

tasks/main.yml

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+---
+# tasks file for main.yml
+
+###########################################################
+- name: Check to make sure we have at least {{ minhosts }} target hosts (if cluster)
+  fail:
+    msg: "You need to have at least {{ minhosts }} target hosts for a cluster!"
+  when: (do_cluster == true) and (minhosts > numhosts)
+
+###########################################################
+- name: Check for Ubuntu
+  fail:
+    msg: "This playbook is only set up to work on Ubuntu hosts."
+  when: ansible_distribution != "Ubuntu"
+
+###########################################################
+- name: Check for Ubuntu LTS >= 16.04
+  fail:
+    msg: "This playbook requires Ubuntu LTS, 16.04 or later."
+  when: not (ansible_distribution_version == "16.04" or
+             ansible_distribution_version == "18.04" or
+             ansible_distribution_version == "20.04")
+
+###########################################################
+- name: Make sure snapd is installed
+  apt:
+    name:
+      - snapd
+    state: present
+
+###########################################################
+- name: Install microk8s
+  snap:
+    name: microk8s
+    classic: true
+    channel: "{{ microk8s_version }}"
+
+###########################################################
+- name: Add user "{{ username }}" to microk8s group
+  user:
+    name: "{{ username }}"
+    groups: "microk8s"
+    append: true
+  when: username != "root"
+
+###########################################################
+- name: Set ownership of /home/{{ username }}/.kube
+  file:
+    path: "/home/{{ username }}/.kube"
+    owner: "{{ username }}"
+    group: "{{ username }}"
+    recurse: true
+  when: username != "root"
+
+###########################################################
+- name: Get cluster-cidr IP range from /var/snap/microk8s/current/args/kube-proxy
+  shell:
+    cmd: grep "cluster-cidr" /var/snap//microk8s/current/args/kube-proxy | cut -d'=' -f2
+  register: cluster_cidr
+  when: do_proxy == true
+
+###########################################################
+- name: Get service-cluster-ip IP range from /var/snap/microk8s/current/args/kube-apiserver
+  shell:
+    cmd: grep "service-cluster-ip" /var/snap//microk8s/current/args/kube-apiserver | cut -d'=' -f2
+  register: service_cluster_ip
+  when: do_proxy == true
+
+###########################################################
+- name: Config proxy for microk8s
+  blockinfile:
+    path: /var/snap/microk8s/current/args/containerd-env
+    block: |
+      # proxy configuration
+      HTTPS_PROXY={{ proxy_host }}
+      NO_PROXY={{ net_cidrs }},{{ cluster_cidr.stdout }},{{ service_cluster_ip.stdout }}
+  when: do_proxy == true
+
+###########################################################
+- name: Restart microk8s to apply proxy config
+  shell:
+    cmd: /usr/bin/snap restart microk8s
+  when: do_proxy == true
+
+###########################################################
+- name: Wait for microk8s ready status
+  shell: source /etc/profile.d/apps-bin-path.sh && microk8s.status --wait-ready
+  args:
+    executable: /bin/bash
+
+###########################################################
+- name: Run add-node command on master node "{{ hostvars[groups['master'][0]].inventory_hostname }}"
+  shell: source /etc/profile.d/apps-bin-path.sh && microk8s.add-node
+  args:
+    executable: /bin/bash
+  register: add_node_cmd
+  delegate_to: "{{ hostvars[groups['master'][0]].inventory_hostname }}"
+  when: do_cluster == true
+
+###########################################################
+- name: Run join command on worker nodes
+  shell: source /etc/profile.d/apps-bin-path.sh && {{ add_node_cmd.stdout_lines[1] }}
+  args:
+    executable: /bin/bash
+  when: (do_cluster == true) and ('workers' in group_names)
+
+###########################################################
+- name: Wait for microk8s ready status
+  shell: source /etc/profile.d/apps-bin-path.sh && microk8s.status --wait-ready
+  args:
+    executable: /bin/bash
+  when: (do_cluster == true) and ('workers' in group_names)
+
+# EOF