kubeadm: update references of "master" label/taint for 1.24

In 1.24 kubeadm will:
- stop using the "master" label on CP nodes.
- start tainting CP nodes with both "master" and "control-plane" taints.

In 1.25 the "master" taint will be removed.

Adjust references of the "master" label/taint to the above.

content/en/examples/controllers/daemonset.yaml

@@ -15,8 +15,11 @@ spec:
         name: fluentd-elasticsearch
     spec:
       tolerations:
-      # this toleration is to have the daemonset runnable on master nodes
-      # remove it if your masters can't run pods
+      # these tolerations are to have the daemonset runnable on control plane nodes
+      # remove them if your control plane nodes should not run pods
+      - key: node-role.kubernetes.io/control-plane
+        operator: Exists
+        effect: NoSchedule
       - key: node-role.kubernetes.io/master
         operator: Exists
         effect: NoSchedule

content/en/examples/controllers/fluentd-daemonset-update.yaml

@@ -19,9 +19,13 @@ spec:
         name: fluentd-elasticsearch
     spec:
       tolerations:
-      # this toleration is to have the daemonset runnable on master nodes
-      # remove it if your masters can't run pods
+      # these tolerations are to have the daemonset runnable on control plane nodes
+      # remove them if your control plane nodes should not run pods
+      - key: node-role.kubernetes.io/control-plane
+        operator: Exists
+        effect: NoSchedule
       - key: node-role.kubernetes.io/master
+        operator: Exists
         effect: NoSchedule
       containers:
       - name: fluentd-elasticsearch

content/en/examples/controllers/fluentd-daemonset.yaml

@@ -19,9 +19,13 @@ spec:
         name: fluentd-elasticsearch
     spec:
       tolerations:
-      # this toleration is to have the daemonset runnable on master nodes
-      # remove it if your masters can't run pods
+      # these tolerations are to have the daemonset runnable on control plane nodes
+      # remove them if your control plane nodes should not run pods
+      - key: node-role.kubernetes.io/control-plane
+        operator: Exists
+        effect: NoSchedule
       - key: node-role.kubernetes.io/master
+        operator: Exists
         effect: NoSchedule
       containers:
       - name: fluentd-elasticsearch