第 5 章 使用事件路由器

流程

1. 为事件路由器创建模板：

   kind: Template
   apiVersion: v1
   metadata:
     name: eventrouter-template
     annotations:
       description: "A pod forwarding kubernetes events to cluster logging stack."
       tags: "events,EFK,logging,cluster-logging"
   objects:
     - kind: ServiceAccount 1
       apiVersion: v1
       metadata:
         name: eventrouter
         namespace: ${NAMESPACE}
     - kind: ClusterRole 2
       apiVersion: v1
       metadata:
         name: event-reader
       rules:   3
       - apiGroups: [""]
         resources: ["events"]
         verbs: ["get", "watch", "list"]
     - kind: ClusterRoleBinding  4
       apiVersion: v1
       metadata:
         name: event-reader-binding
       subjects:
       - kind: ServiceAccount
         name: eventrouter
         namespace: ${NAMESPACE}
       roleRef:
         kind: ClusterRole
         name: event-reader
     - kind: ConfigMap
       apiVersion: v1
       metadata:
         name: eventrouter
         namespace: ${NAMESPACE}
       data:
         config.json: |-
           {
             "sink": "stdout"
           }
     - kind: Deployment
       apiVersion: apps/v1
       metadata:
         name: eventrouter
         namespace: ${NAMESPACE}
         labels:
           component: eventrouter
           logging-infra: eventrouter
           provider: openshift
       spec:
         selector:
           matchLabels:
             component: eventrouter
             logging-infra: eventrouter
             provider: openshift
         replicas: 1
         template:
           metadata:
             labels:
               component: eventrouter
               logging-infra: eventrouter
               provider: openshift
             name: eventrouter
           spec:
             serviceAccount: eventrouter
             containers:
               - name: kube-eventrouter
                 image: ${IMAGE}
                 imagePullPolicy: IfNotPresent
                 resources:
                   limits:
                     memory: ${MEMORY}
                   requests:
                     cpu: ${CPU}
                     memory: ${MEMORY}
                 volumeMounts:
                 - name: config-volume
                   mountPath: /etc/eventrouter
             volumes:
               - name: config-volume
                 configMap:
                   name: eventrouter
   parameters:
     - name: IMAGE 5
       displayName: Image
       value: "registry.redhat.io/openshift4/ose-logging-eventrouter:latest"
     - name: MEMORY 6
       displayName: Memory
       value: "128Mi"
     - name: CPU  7
       displayName: CPU
       value: "100m"
     - name: NAMESPACE  8
       displayName: Namespace
       value: "openshift-logging"

   1

   为事件路由器创建服务帐户。

   2

   创建用于监控集群中事件的集群角色。

   3

   授予 events 资源 get、watch 和 list 权限。

   4

   创建一个 ClusterRoleBinding 将 ClusterRole 绑定到 ServiceAccount。

   5

   为事件路由器指定镜像版本。

   6

   为事件路由器 Pod 指定内存限值。默认值为“128Mi”。

   7

   指定分配给事件路由器的最小 CPU 数量。默认值为“100m”。

   8

   指定要部署事件路由器的命名空间。默认值为 openshift-logging。该值必须与为 ServiceAccount 和 ClusterRoleBinding 指定的值相同。该项目指示您可以在 Kibana 中查找事件的位置：

   • 如果事件路由器 Pod 部署到默认项目中，如 kube-* 和 openshift-*，您可以在 .operation 索引下查找事件。
   • 如果事件路由器 Pod 部署到其他项目中，您可以在使用项目命名空间的索引下查找事件。

2. 使用以下命令来处理和应用模板：

   $ oc process -f <templatefile> | oc apply -f -

   例如：

   $ oc process -f eventrouter.yaml | oc apply -f -
   
   serviceaccount/logging-eventrouter created
   clusterrole.authorization.openshift.io/event-reader created
   clusterrolebinding.authorization.openshift.io/event-reader-binding created
   configmap/logging-eventrouter created
   deployment.apps/logging-eventrouter created

3. 验证是否安装了事件路由器：

   $ oc get pods --selector  component=eventrouter -o name
   
   pod/logging-eventrouter-d649f97c8-qvv8r

   $ oc logs logging-eventrouter-d649f97c8-qvv8r
   
   {"verb":"ADDED","event":{"metadata":{"name":"elasticsearch-operator.v0.0.1.158f402e25397146","namespace":"openshift-operators","selfLink":"/api/v1/namespaces/openshift-operators/events/elasticsearch-operator.v0.0.1.158f402e25397146","uid":"37b7ff11-4f1a-11e9-a7ad-0271b2ca69f0","resourceVersion":"523264","creationTimestamp":"2019-03-25T16:22:43Z"},"involvedObject":{"kind":"ClusterServiceVersion","namespace":"openshift-operators","name":"elasticsearch-operator.v0.0.1","uid":"27b2ca6d-4f1a-11e9-8fba-0ea949ad61f6","apiVersion":"operators.coreos.com/v1alpha1","resourceVersion":"523096"},"reason":"InstallSucceeded","message":"waiting for install components to report healthy","source":{"component":"operator-lifecycle-manager"},"firstTimestamp":"2019-03-25T16:22:43Z","lastTimestamp":"2019-03-25T16:22:43Z","count":1,"type":"Normal"}}