增加EFK插件的原理介绍

manifests/EFK/test.yaml

@@ -0,0 +1,56 @@
+apiVersion: extensions/v1beta1
+kind: DaemonSet
+metadata:
+  name: fluentd-es-v1.22
+  namespace: kube-system
+  labels:
+    k8s-app: fluentd-es
+    kubernetes.io/cluster-service: "true"
+    addonmanager.kubernetes.io/mode: Reconcile
+    version: v1.22
+spec:
+  template:
+    metadata:
+      labels:
+        k8s-app: fluentd-es
+        kubernetes.io/cluster-service: "true"
+        version: v1.22
+      # This annotation ensures that fluentd does not get evicted if the node
+      # supports critical pod annotation based priority scheme.
+      # Note that this does not guarantee admission on the nodes (#40573).
+      annotations:
+        scheduler.alpha.kubernetes.io/critical-pod: ''
+    spec:
+      serviceAccountName: efk
+      containers:
+      - name: fluentd-es
+        image: sz-pg-oam-docker-hub-001.tendcloud.com/library/fluentd-elasticsearch:1.22
+        command:
+          - '/bin/sh'
+          - '-c'
+          - '/usr/sbin/td-agent 2>&1 >> /var/log/fluentd.log'
+        resources:
+          limits:
+            memory: 200Mi
+          requests:
+            cpu: 100m
+            memory: 200Mi
+        volumeMounts:
+        - name: varlog
+          mountPath: /var/log
+        - name: varlibdockercontainers
+          mountPath: /var/lib/docker/containers
+          readOnly: true
+      nodeSelector:
+        beta.kubernetes.io/fluentd-ds-ready: "true"
+      tolerations:
+      - key : "node.alpha.kubernetes.io/ismaster"
+        effect: "NoSchedule"
+      terminationGracePeriodSeconds: 30
+      volumes:
+      - name: varlog
+        hostPath:
+          path: /var/log
+      - name: varlibdockercontainers
+        hostPath:
+          path: /var/lib/docker/containers

practice/efk-addon-installation.md

@@ -1,5 +1,7 @@
 # 安装EFK插件
 
+我们通过在每台node上部署一个以DaemonSet方式运行的fluentd来收集每台node上的日志。Fluentd将docker日志目录`/var/lib/docker/containers`和`/var/log`目录挂载到Pod中，然后Pod会在node节点的`/var/log/pods`目录中创建新的目录，可以区别不同的容器日志输出，该目录下有一个日志文件链接到`/var/lib/docker/contianers`目录下的容器日志输出。
+
 官方文件目录：`cluster/addons/fluentd-elasticsearch`
 
 ``` bash
@@ -9,7 +11,7 @@ es-controller.yaml  es-service.yaml  fluentd-es-ds.yaml  kibana-controller.yaml
 
 同样EFK服务也需要一个`efk-rbac.yaml`文件，配置serviceaccount为`efk`。
 
-已经修改好的 yaml 文件见：[EFK](./manifests/EFK)
+已经修改好的 yaml 文件见：[EFK](../manifests/EFK)
 
 
 ## 配置 es-controller.yaml