cleanup: removed centos code, cleaned up debian & ubuntu references

README.md

@@ -7,7 +7,7 @@ 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.
+should also be running Ubuntu LTS; 18.04, 20.04 or 22.04.
 
 It is also assumed that the user running the playbook has SSH key access
 set up for the root user on the target hosts.
@@ -17,5 +17,5 @@ This playbook can be run using the following command line;
     ansible-playbook -i <inventory file> -e "username=<username>" microk8s.yml
 
     ie,
-    ansible-playbook -i microk8s_inventory.yml -e "username=ubuntu" microk8s.yml
+    ansible-playbook -i microk8s_inventory.yml -e "username=someuser" microk8s.yml
 

microk8s.yml

@@ -7,7 +7,7 @@
 #
 # 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.
+# should also be running Ubuntu LTS; 18.04, 20.04 or 22.04.
 #
 # It is also assumed that the user running the playbook has SSH key access
 # set up for the root user on the target hosts.
@@ -19,7 +19,7 @@
 # ansible-playbook -i <inventory file> -e "username=<username>" microk8s.yml
 #
 # ie,
-# ansible-playbook -i microk8s_inventory.yml -e "username=ubuntu" microk8s.yml
+# ansible-playbook -i microk8s_inventory.yml -e "username=someuser" microk8s.yml
 #
 ###########################################################################
 
@@ -35,7 +35,7 @@
         numhosts: "{{ groups['all'] | length }}"
         # Set the following variable as required
         # ie,
-        #     username: ubuntu
+        #     username: someuser
         #
         # Default is to apply the playbook against the root user
         username: "root"