|NO.Z.00267|——————————|CloudNative|——|KuberNetes&中间件容器化及helm.V14|——|中间件.v03|RabbitMQ|扩容和缩容|

一、RabbitMQ扩容和缩容

### --- RabbitMQ扩容

[root@k8s-master01 rabbit-cluster]# kubectl get sts -n public-service
NAME          READY   AGE
rmq-cluster   3/3     41m
[root@k8s-master01 rabbit-cluster]# kubectl scale sts rmq-cluster --replicas=4 -n public-service
statefulset.apps/rmq-cluster scaled

### --- 查看扩容结果

[root@k8s-master01 rabbit-cluster]# kubectl get po -n public-service 
NAME            READY   STATUS    RESTARTS   AGE
rmq-cluster-0   0/1     Running   0          10m
rmq-cluster-1   0/1     Running   0          10m
rmq-cluster-2   0/1     Running   0          10m
rmq-cluster-3   0/1     Running   0          10m

二、通过web控制台可以查看到新扩容的实例已经添加进来

三、RabbitMQ缩容

### --- rabbitmq缩容

[root@k8s-master01 rabbit-cluster]# kubectl scale sts rmq-cluster --replicas=3 -n public-service

### --- 查看缩容后结果

[root@k8s-master01 rabbit-cluster]# kubectl get po -n public-service 
NAME            READY   STATUS    RESTARTS   AGE
rmq-cluster-0   0/1     Running   0          10m
rmq-cluster-1   0/1     Running   0          10m
rmq-cluster-2   0/1     Running   0          10m

四、通过控制台查看结果：web控制台rabbitmq已经变成红色状态，待会会清除结束

测试容灾：删除容器rmq-cluster-0，查看队列是否存在；会自动会添加进来。

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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

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