Add falco service k8s (#496)

* Add falco service to k8s install/update labels

Update the instructions for K8s RBAC installation to also create a
service that maps to port 8765 of the falco pod. This allows other
services to access the embedded webserver within falco.

Also clean up the set of labels to use a consistent app: falco-example,
role:security for each object.

* Cange K8s Audit Example to use falco daemonset

Change the K8s Audit Example instructions to use minikube in conjunction
with a falco daemonset running inside of minikube. (We're going to start
prebuilding kernel modules for recent minikube variants to make this
possible).

When running inside of minikube in conjunction with a service, you have
to go through some additional steps to find the ClusterIP associated
with the falco service and use that ip when configuring the k8s audit
webhook. Overall it's still a more self-contained set of instructions,
though.

integrations/k8s-using-daemonset/k8s-with-rbac/falco-account.yaml

@@ -2,11 +2,17 @@ apiVersion: v1
 kind: ServiceAccount
 metadata:
   name: falco-account
+  labels:
+    app: falco-example
+    role: security
 ---
 kind: ClusterRole
 apiVersion: rbac.authorization.k8s.io/v1beta1
 metadata:
   name: falco-cluster-role
+  labels:
+    app: falco-example
+    role: security
 rules:
   - apiGroups: ["extensions",""]
     resources: ["nodes","namespaces","pods","replicationcontrollers","services","events","configmaps"]
@@ -19,6 +25,9 @@ apiVersion: rbac.authorization.k8s.io/v1beta1
 metadata:
   name: falco-cluster-role-binding
   namespace: default
+  labels:
+    app: falco-example
+    role: security
 subjects:
   - kind: ServiceAccount
     name: falco-account

integrations/k8s-using-daemonset/k8s-with-rbac/falco-daemonset-configmap.yaml

@@ -1,16 +1,15 @@
 apiVersion: extensions/v1beta1
 kind: DaemonSet
 metadata:
-  name: falco
+  name: falco-daemonset
   labels:
-    name: falco-daemonset
-    app: demo
+    app: falco-example
+    role: security
 spec:
   template:
     metadata:
       labels:
-        name: falco
-        app: demo
+        app: falco-example
         role: security
     spec:
       serviceAccount: falco-account

integrations/k8s-using-daemonset/k8s-with-rbac/falco-service.yaml

@@ -0,0 +1,13 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: falco-service
+  labels:
+    app: falco-example
+    role: security
+spec:
+  selector:
+    app: falco-example
+  ports:
+  - protocol: TCP
+    port: 8765