chore: document k3s master vars

provision/ansible/inventory/group_vars/master/k3s.yml

@@ -11,12 +11,17 @@ k3s_server:
   tls-san:
     # kube-vip
     - "{{ kubevip_address }}"
+  # Disable Docker - this will use the default containerd CRI
   docker: false
   flannel-backend: "none" # This needs to be in quotes
   disable:
+    # Disable flannel - replaced with Calico
     - flannel
+    # Disable traefik - installed with Flux
     - traefik
+    # Disable servicelb - replaced with metallb and install with Flux
     - servicelb
+    # Disable metrics-server - installed with Flux
     - metrics-server
   disable-network-policy: true
   disable-cloud-controller: true
@@ -26,17 +31,22 @@ k3s_server:
   # Network CIDR to use for service IPs
   service-cidr: "10.43.0.0/16"
   kubelet-arg:
+    # Enables the kubelet to gracefully evict pods during a node shutdown
     - "feature-gates=GracefulNodeShutdown=true"
+    # Allow k8s services to contain TCP and UDP on the same port
     - "feature-gates=MixedProtocolLBService=true"
-  # Required to use monitor these components with kube-prometheus-stack
+  # Required to monitor kube-controller-manager with kube-prometheus-stack
   kube-controller-manager-arg:
     - "address=0.0.0.0"
     - "bind-address=0.0.0.0"
+  # Required to monitor kube-proxy with kube-prometheus-stack
   kube-proxy-arg:
     - "metrics-bind-address=0.0.0.0"
+  # Required to monitor kube-scheduler with kube-prometheus-stack
   kube-scheduler-arg:
     - "address=0.0.0.0"
     - "bind-address=0.0.0.0"
+  # Required to monitor etcd with kube-prometheus-stack
   etcd-expose-metrics: true
   # Required for HAProxy health-checks
   kube-apiserver-arg: