keepalived: Initial commit

Running `keepalived` as a DaemonSet will allow managing floating
"virtual" IP addresses for Kubernetes services with configured external
IP addresses.  The main services we want to expose outside the cluster
are _ingress-nginx_, Mosquitto, and RabbitMQ.  The `keepalived` cluster
will negotiate using the VRRF protocol to determine which node should
have each external address.  Using the process tracking feature of
`keepalived`, we can steer traffic directly to the node where the target
service is running.

keepalived/kustomization.yaml

@@ -0,0 +1,24 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+labels:
+- pairs:
+    app.kubernetes.io/component: keepalived
+    app.kubernetes.io/instance: keepalived
+  includeSelectors: true
+  includeTemplates: true
+- pairs:
+    app.kubernetes.io/part-of: keepalived
+
+namespace: keepalived
+
+resources:
+- keepalived.yaml
+
+configMapGenerator:
+- name: keepalived
+  files:
+  - keepalived.conf
+  options:
+    labels:
+      app.kubernetes.io/name: keepalived