新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch13/fluentbit/fluentbit.yaml

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+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: fluent-bit
+  namespace: kiamol-ch13-logging
+  labels:
+    kiamol: ch13
+spec:
+  selector:
+    matchLabels:
+      app: fluent-bit
+  template:
+    metadata:
+      labels:
+        app: fluent-bit
+    spec:
+      serviceAccountName: fluent-bit
+      containers:
+      - name: fluent-bit
+        image: fluent/fluent-bit:1.8.11
+        volumeMounts:
+        - name: fluent-bit-config
+          mountPath: /fluent-bit/etc/
+        - name: varlog
+          mountPath: /var/log
+        - name: varlibdockercontainers
+          mountPath: /var/lib/docker/containers
+          readOnly: true
+      volumes:
+      - name: fluent-bit-config
+        configMap:
+          name: fluent-bit-config
+      - name: varlog
+        hostPath:
+          path: /var/log
+      - name: varlibdockercontainers
+        hostPath:
+          path: /var/lib/docker/containers
+---
+# RBAC configuration - ignore this until we get to chapter 17 :)
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: fluent-bit
+  namespace: kiamol-ch13-logging
+  labels:
+    kiamol: ch13
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: fluent-bit
+  labels:
+    kiamol: ch13
+rules:
+- apiGroups: [""]
+  resources:
+  - namespaces
+  - pods
+  verbs: ["get", "list", "watch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: fluent-bit
+  labels:
+    kiamol: ch13
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: fluent-bit
+subjects:
+- kind: ServiceAccount
+  name: fluent-bit
+  namespace: kiamol-ch13-logging