6.3. 将资源移到基础架构 MachineSet

流程

1. 查看路由器 Operator 的 IngressController 自定义资源：

   $ oc get ingresscontroller default -n openshift-ingress-operator -o yaml

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   命令输出类似于以下文本：

   apiVersion: operator.openshift.io/v1
   kind: IngressController
   metadata:
     creationTimestamp: 2019-04-18T12:35:39Z
     finalizers:
     - ingresscontroller.operator.openshift.io/finalizer-ingresscontroller
     generation: 1
     name: default
     namespace: openshift-ingress-operator
     resourceVersion: "11341"
     selfLink: /apis/operator.openshift.io/v1/namespaces/openshift-ingress-operator/ingresscontrollers/default
     uid: 79509e05-61d6-11e9-bc55-02ce4781844a
   spec: {}
   status:
     availableReplicas: 2
     conditions:
     - lastTransitionTime: 2019-04-18T12:36:15Z
       status: "True"
       type: Available
     domain: apps.<cluster>.example.com
     endpointPublishingStrategy:
       type: LoadBalancerService
     selector: ingresscontroller.operator.openshift.io/deployment-ingresscontroller=default

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2. 编辑 ingresscontroller 资源，并更改 nodeSelector 以使用infra 标签：

   $ oc edit ingresscontroller default -n openshift-ingress-operator -o yaml

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   在 spec 中添加使用 infra 标签的 nodeSelector 的部分，如下所示：

     spec:
       nodePlacement:
         nodeSelector:
           matchLabels:
             node-role.kubernetes.io/infra: ""

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3. 确认路由器 Pod 在 infra 节点上运行。

   1. 查看路由器 Pod 列表，并记下正在运行的 Pod 的节点名称：

      $ oc get pod -n openshift-ingress -o wide
      
      NAME                              READY     STATUS        RESTARTS   AGE       IP           NODE                           NOMINATED NODE   READINESS GATES
      router-default-86798b4b5d-bdlvd   1/1      Running       0          28s       10.130.2.4   ip-10-0-217-226.ec2.internal   <none>           <none>
      router-default-955d875f4-255g8    0/1      Terminating   0          19h       10.129.2.4   ip-10-0-148-172.ec2.internal   <none>           <none>

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      在本例中，正在运行的 Pod 位于 ip-10-0-217-226.ec2.internal 节点上。

   2. 查看正在运行的 Pod 的节点状态：

      $ oc get node <node_name> 

      1

      
      
      NAME                           STATUS    ROLES          AGE       VERSION
      ip-10-0-217-226.ec2.internal   Ready     infra,worker   17h       v1.14.6+c4799753c

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      1

      指定从 Pod 列表获得的 <node_name>。

      由于角色列表包含 infra，因此 Pod 在正确的节点上运行。

流程

1. 查看 config/instance 对象：

   $ oc get config/cluster -o yaml

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   输出类似于以下文本：

   apiVersion: imageregistry.operator.openshift.io/v1
   kind: Config
   metadata:
     creationTimestamp: 2019-02-05T13:52:05Z
     finalizers:
     - imageregistry.operator.openshift.io/finalizer
     generation: 1
     name: cluster
     resourceVersion: "56174"
     selfLink: /apis/imageregistry.operator.openshift.io/v1/configs/cluster
     uid: 36fd3724-294d-11e9-a524-12ffeee2931b
   spec:
     httpSecret: d9a012ccd117b1e6616ceccb2c3bb66a5fed1b5e481623
     logging: 2
     managementState: Managed
     proxy: {}
     replicas: 1
     requests:
       read: {}
       write: {}
     storage:
       s3:
         bucket: image-registry-us-east-1-c92e88cad85b48ec8b312344dff03c82-392c
         region: us-east-1
   status:
   ...

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2. 编辑 config/instance 对象：

   $ oc edit config/cluster

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3. 在对象的 spec 部分添加以下文本行：

     nodeSelector:
       node-role.kubernetes.io/infra: ""

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4. 验证 registry Pod 已移至基础架构节点。

   1. 运行以下命令检查 registry Pod 所在的节点：

      $ oc get pods -o wide -n openshift-image-registry

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   2. 确认节点具有您指定的标签：

      $ oc describe node <node_name>

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      查看命令输出，并确认 node-role.kubernetes.io/infra 列在 LABELS 列表中。

流程

1. 将以下 ConfigMap 定义保存为 cluster-monitoring-configmap.yaml 文件：

   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: cluster-monitoring-config
     namespace: openshift-monitoring
   data:
     config.yaml: |+
       alertmanagerMain:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       prometheusK8s:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       prometheusOperator:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       grafana:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       k8sPrometheusAdapter:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       kubeStateMetrics:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       telemeterClient:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       openshiftStateMetrics:
         nodeSelector:
           node-role.kubernetes.io/infra: ""

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   运行此 ConfigMap 会强制将监控堆栈的组件重新部署到基础架构节点。

2. 应用新的 ConfigMap：

   $ oc create -f cluster-monitoring-configmap.yaml

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3. 观察监控 Pod 移至新机器：

   $ watch 'oc get pod -n openshift-monitoring -o wide'

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4. 如果组件没有移到 infra 节点，请删除带有这个组件的 pod:

   $ oc delete pod -n openshift-monitoring <pod>

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   已删除 pod 的组件在 infra 节点上重新创建。

流程

1. 编辑 openshift-logging 项目中的集群日志记录自定义资源：

   $ oc edit ClusterLogging instance

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   apiVersion: logging.openshift.io/v1
   kind: ClusterLogging
   
   ....
   
   spec:
     collection:
       logs:
         fluentd:
           resources: null
         type: fluentd
     curation:
       curator:
         nodeSelector: 

   1

   
             node-role.kubernetes.io/infra: ''
         resources: null
         schedule: 30 3 * * *
       type: curator
     logStore:
       elasticsearch:
         nodeCount: 3
         nodeSelector: 

   2

   
             node-role.kubernetes.io/infra: ''
         redundancyPolicy: SingleRedundancy
         resources:
           limits:
             cpu: 500m
             memory: 16Gi
           requests:
             cpu: 500m
             memory: 16Gi
         storage: {}
       type: elasticsearch
     managementState: Managed
     visualization:
       kibana:
         nodeSelector: 

   3

   
             node-role.kubernetes.io/infra: '' 

   4

   
         proxy:
           resources: null
         replicas: 1
         resources: null
       type: kibana
   
   ....

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