Add support for ubuntu

README.md

@@ -7,7 +7,7 @@ Author: <https://github.com/itwars>
 Build a Kubernetes cluster using Ansible with k3s. The goal is easily install a Kubernetes cluster on machines running:
 
 - [X] Debian
-- [ ] Ubuntu
+- [X] Ubuntu
 - [X] CentOS
 
 on processor architecture:

roles/download/tasks/main.yml

@@ -22,8 +22,11 @@
     group: root
     mode: 0755
   when:
-    - ansible_facts.architecture is search("arm")
-    - ansible_facts.userspace_bits == "64"
+    ( ansible_facts.architecture is search("arm")
+      and
+      ansible_facts.userspace_bits == "64" )
+    or
+      ansible_facts.architecture == "aarch64"
 
 - name: Download k3s binary armhf
   get_url:

roles/ubuntu/tasks/main.yml

@@ -0,0 +1,37 @@
+---
+
+- name: Check if cgroups enabled in /boot/firmware/cmdline.txt
+  shell: cat /boot/firmware/cmdline.txt | grep cgroup
+  register: cgroup_enabled
+  when: ansible_distribution == 'Ubuntu'
+  # grep will exit with 1 when no results found.
+  # ignore_errors causes the task not to halt play.
+  ignore_errors: true
+
+- name: Enable cgroup via boot commandline if not already present
+  lineinfile:
+    path: /boot/firmware/cmdline.txt
+    backrefs: yes
+    regexp: "(.*)$"
+    line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
+  when:
+    ( ansible_distribution == 'Ubuntu' )
+      and
+    ( cgroup_enabled.stdout == "" )
+
+- name: Check if cgroups already running
+  shell: cat /proc/cmdline | grep cgroup
+  register: cgroup_running
+  when:
+    ansible_distribution == 'Ubuntu'
+  # grep will exit with 1 when no results found.
+  # ignore_errors causes the task not to halt play.
+  ignore_errors: true
+
+- name: Rebooting to enable cgroups if not already running
+  reboot:
+  when:
+    ( ansible_distribution == 'Ubuntu' )
+      and
+    ( cgroup_running.stdout == "" )
+

site.yml

@@ -7,7 +7,7 @@
     - role: prereq
     - role: download
     - role: raspbian
-
+    - role: ubuntu
 
 - hosts: master
   become: yes