|NO.Z.00213|——————————|CloudNative|——|KuberNetes&高级调度.V16|——|Pod亲和力反亲和力.v04|pod反亲和力_部署不同主机|

一、若是想把demo-nginx部署在不同的节点上面，

### --- 部署demo-nginx至不同的宿主机上
~~~     编写yaml文件
~~~     demo-nginx就和当前的app下的demo-nginx匹配，不写namespace就是当前的namespace下

[root@k8s-master01 ~]# vim pod-Affinity-demo-nginx.yaml 
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - demo-nginx    
            topologyKey: kubernetes.io/hostname 

### --- replace重新触发一下

[root@k8s-master01 ~]# kubectl replace -f pod-Affinity-demo-nginx.yaml
deployment.apps/demo-nginx replaced

### --- 验证结果
~~~     部署在了k8s-master01和k8s-node01节点上面
~~~     在部署Redis集群和统一业务的集群，尽量不要部署在同一个节点 

[root@k8s-master01 ~]# kubectl get po -owide
NAME                          READY   STATUS        RESTARTS   AGE   IP              NODE           NOMINATED NODE   READINESS GATES
busybox                       1/1     Running       0          36m   172.25.92.90    k8s-master02   <none>           <none>
demo-nginx-7c464c79f7-hg4rm   2/2     Running       0          35s   172.18.195.42   k8s-master03   <none>           <none>
demo-nginx-7c464c79f7-v7pmw   2/2     Running       0          35s   172.17.125.35   k8s-node01     <none>           <none>

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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