fix master taint implementation - linting problems (#95)

* add virtual-ip to certificate SAN entries

Adds the kube-vip IP as a Subject Alternative Name in the TLS cert. It is needed otherwise you cannot access the cluster.

* fixes bug with master taints (#1)

- improves taint logic

* fixes typo

* fixes formatting

* fixes undefined group['node'] if missing from hosts.ini (#2)

* fixes undefined group['node'] if missing from hosts.ini

- improves application of master taint by centralizing code

* improves molecule testing, fixes linting

* hacking at linter problems, small tweaks

- increases the metallb timeout error due to intermittent testing errors in GitHub actions

* improves context by renaming taint variable

- makes variable boolean

* fix bug

* removes linting hacks

Co-authored-by: Ioannis Angelakopoulos <ioangel@gmail.com>

roles/k3s/master/tasks/main.yml

@@ -64,8 +64,7 @@
     cmd: "systemd-run -p RestartSec=2 \
                       -p Restart=on-failure \
                       --unit=k3s-init \
-                      k3s server {{ server_init_args }} \
-                      {{ '--node-taint CriticalAddonsOnly=true:NoExecute' if k3s_single_node|bool == false else ''}}"
+                      k3s server {{ server_init_args }}"
     creates: "{{ systemd_dir }}/k3s.service"
   args:
     warn: false  # The ansible systemd module does not support transient units

roles/k3s/master/templates/k3s.service.j2

@@ -7,7 +7,7 @@ After=network-online.target
 Type=notify
 ExecStartPre=-/sbin/modprobe br_netfilter
 ExecStartPre=-/sbin/modprobe overlay
-ExecStart=/usr/local/bin/k3s server {{ extra_server_args | default("") }} {{ '--node-taint CriticalAddonsOnly=true:NoExecute' if k3s_single_node|bool == false else ''}}
+ExecStart=/usr/local/bin/k3s server {{ extra_server_args | default("") }}
 KillMode=process
 Delegate=yes
 # Having non-zero Limit*s causes performance problems due to accounting overhead

roles/k3s/master/templates/metallb.crds.j2

@@ -1648,8 +1648,6 @@ spec:
       - effect: NoSchedule
         key: node-role.kubernetes.io/control-plane
         operator: Exists
-      - key: CriticalAddonsOnly
-        operator: Exists
 ---
 apiVersion: admissionregistration.k8s.io/v1
 kind: ValidatingWebhookConfiguration

roles/k3s/master/templates/vip.yaml.j2

@@ -69,8 +69,6 @@ spec:
         operator: Exists
       - effect: NoExecute
         operator: Exists
-      - key: CriticalAddonsOnly
-        operator: Exists
   updateStrategy: {}
 status:
   currentNumberScheduled: 0