|NO.Z.00276|——————————|CloudNative|——|KuberNetes&中间件容器化及helm.V23|——|中间件.v03|helm.v3.5.4|集群测试|zookeeper&kafka|

一、kafka和zookeeper集群测试

### --- 查看kafka和zookeeper集群状态

[root@k8s-master01 zookeeper-kafka]# kubectl get po -n public-service -owide
NAME          READY   STATUS    RESTARTS   AGE   IP              NODE         NOMINATED NODE   READINESS GATES
kafka-0       1/1     Running   0          28m   172.17.125.23   k8s-node01   <none>           <none>
zookeeper-0   1/1     Running   0          95m   172.27.14.246   k8s-node02   <none>           <none>

[root@k8s-master01 zookeeper-kafka]# kubectl get svc -n public-service -owide
NAME                 TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE   SELECTOR
kafka                ClusterIP   10.111.68.94     <none>        9092/TCP                     46m   app.kubernetes.io/component=kafka,app.kubernetes.io/instance=kafka,app.kubernetes.io/name=kafka
kafka-headless       ClusterIP   None             <none>        9092/TCP,9093/TCP            46m   app.kubernetes.io/component=kafka,app.kubernetes.io/instance=kafka,app.kubernetes.io/name=kafka
zookeeper            ClusterIP   10.107.222.142   <none>        2181/TCP,2888/TCP,3888/TCP   95m   app.kubernetes.io/component=zookeeper,app.kubernetes.io/instance=zookeeper,app.kubernetes.io/name=zookeeper
zookeeper-headless   ClusterIP   None             <none>        2181/TCP,2888/TCP,3888/TCP   95m   app.kubernetes.io/component=zookeeper,app.kubernetes.io/instance=zookeeper,app.kubernetes.io/name=zookeeper

[root@k8s-master01 zookeeper-kafka]# kubectl get ep -n public-service -owide
NAME                 ENDPOINTS                                                  AGE
kafka                172.17.125.23:9092                                         47m
kafka-headless       172.17.125.23:9092,172.17.125.23:9093                      47m
zookeeper            172.27.14.246:3888,172.27.14.246:2181,172.27.14.246:2888   95m
zookeeper-headless   172.27.14.246:3888,172.27.14.246:2181,172.27.14.246:2888   95m

二、kafka和zookeeper集群测试

### --- 测试zookeeper的2181端口是否是通的

[root@k8s-master01 zookeeper-kafka]# telnet 10.107.222.142 2181
Trying 10.107.222.142...
Connected to 10.107.222.142.
Escape character is '^]'.

### --- 查看kafka有没有服务连接到zookeeper上
~~~     注：可以看到打开了一个socket连接，
~~~     连接到了zookeeper/10.107.222.142:2181上(上面查到的service的地址）
                                                         
[root@k8s-master01 zookeeper-kafka]# kubectl logs -f kafka-0 -n public-service 
[2021-05-22 10:33:48,900] INFO Opening socket connection to server zookeeper/10.107.222.142:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn)
[2021-05-22 10:33:48,934] INFO Socket connection established, initiating session, client: /172.17.125.23:53242, server: zookeeper/10.107.222.142:2181 (org.apache.zookeeper.ClientCnxn)
[2021-05-22 10:33:48,963] INFO Session establishment complete on server zookeeper/10.107.222.142:2181, sessionid = 0x100006a18c00002, negotiated timeout = 18000 (org.apache.zookeeper.ClientCnxn

三、kafka集群准备就绪，进行如下测试

### --- 使用以下命令创建名为mytopic的主题。
~~~     将ZOOKEEPER-SERVICE-NAME占位符替换为在步骤1结束时获得的Apache Zookeeper服务名称：
~~~     进入到容器中，创建一个producer：生产者：是没有提示信息的

[root@k8s-master01 kafka]# kubectl exec -ti kafka-0 -n public-service -- bash 
I have no name!@kafka-0:/$ kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic mytopic 
message 1
message 2

### --- 创建一个consumer：消费者：另起一个窗口
~~~     注:说明这个集群是可以使用的，它的消息队列是可以使用的。
~~~     # 生产环境中：可以最少3个节点，奇数个节点，不可以使用偶数个节点

[root@k8s-master01 kafka]# kubectl exec -ti kafka-0 -n public-service -- bash
I have no name!@kafka-0:/$ kafka-console-producer.sh --broker-list kafka:9092 --topic mytopic
>message 1
>message 2

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