Websocket Support: Pod Reaper (#1982)

Websocket event support for cleaning up pods only after WS connection is terminated. The support for websocket is right now in the environment itself and router simply acts as a proxy for WS communication!

fetcher-pod-sa.yaml

@@ -0,0 +1,30 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: fission-function
+  name: event-fetcher
+rules:
+- apiGroups: [""] # "" indicates the core API group
+  resources: ["pods"]
+  verbs: ["get", "watch", "list"]
+- apiGroups: [""] # "" indicates the core API group
+  resources: ["events"]
+  verbs: ["*"]
+
+--- 
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: fission-fetcher-pod-reader
+  namespace: fission-function
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: event-fetcher
+subjects:
+- kind: ServiceAccount
+  name: fission-fetcher
+  namespace: fission-function
+--- 
+