Unable to connect to server: zk2:2181

[mrhjx2]

2018-06-29 02:46:47,330 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-1.8-openjdk/jre 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/zookeeper-3.4.12/bin/../build/classes:/zookeeper-3.4.12/bin/../build/lib/.jar:/zookeeper-3.4.12/bin/../lib/slf4j-log4j12-1.7.25.jar:/zookeeper-3.4.12/bin/../lib/slf4j-api-1.7.25.jar:/zookeeper-3.4.12/bin/../lib/netty-3.10.6.Final.jar:/zookeeper-3.4.12/bin/../lib/log4j-1.2.17.jar:/zookeeper-3.4.12/bin/../lib/jline-0.9.94.jar:/zookeeper-3.4.12/bin/../lib/audience-annotations-0.5.0.jar:/zookeeper-3.4.12/bin/../zookeeper-3.4.12.jar:/zookeeper-3.4.12/bin/../src/java/lib/.jar:/conf: 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64:/usr/lib/jvm/java-1.8-openjdk/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler= 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0-693.21.1.el7.x86_64 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root 2018-06-29 02:46:47,331 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root 2018-06-29 02:46:47,332 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/zookeeper-3.4.12 2018-06-29 02:46:47,334 [myid:] - INFO [main:ZooKeeper@441] - Initiating client connection, connectString=zk2:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@446cdf90 2018-06-29 02:46:47,343 [myid:] - ERROR [main:StaticHostProvider@83] - Unable to connect to server: zk2:2181 java.net.UnknownHostException: zk2: Name does not resolve at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) at java.net.InetAddress.getAllByName0(InetAddress.java:1276) at java.net.InetAddress.getAllByName(InetAddress.java:1192) at java.net.InetAddress.getAllByName(InetAddress.java:1126) at org.apache.zookeeper.client.StaticHostProvider.(StaticHostProvider.java:62) at org.apache.zookeeper.ZooKeeper.(ZooKeeper.java:449) at org.apache.zookeeper.ZooKeeperMain.connectToZK(ZooKeeperMain.java:283) at org.apache.zookeeper.ZooKeeperMain.(ZooKeeperMain.java:297) at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:290) Exception in thread "main" java.lang.IllegalArgumentException: A HostProvider may not be empty! at org.apache.zookeeper.client.StaticHostProvider.(StaticHostProvider.java:88) at org.apache.zookeeper.ZooKeeper.(ZooKeeper.java:449) at org.apache.zookeeper.ZooKeeperMain.connectToZK(ZooKeeperMain.java:283) at org.apache.zookeeper.ZooKeeperMain.(ZooKeeperMain.java:297) at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:290)

I get a error logs but nodes is runing

[cookeem]

The service name should be zk-2 not zk2.

2018-06-29 02:46:47,343 [myid:] - ERROR [main:StaticHostProvider@83] - Unable to connect to server: zk2:2181

[mrhjx2]

I try to find zk2 in my config but there's no zk2 word in my deployment and service config file zk-service.yaml kind: Service apiVersion: v1 metadata: name: zk-1 labels: app: zk node: node1 spec: type: LoadBalancer ports:

• name: port-2181 port: 2181
• name: port-2888 port: 2888
• name: port-3888 port: 3888 selector: app: zk node: node1

---

kind: Service apiVersion: v1 metadata: name: zk-2 labels: app: zk node: node2 spec: type: LoadBalancer ports:

• name: port-2181 port: 2181
• name: port-2888 port: 2888

• name: port-3888 port: 3888 selector: app: zk node: node2 zk-deployment.yaml

  kind: Deployment apiVersion: extensions/v1beta1 metadata: name: zk-0 spec: replicas: 1 template: metadata: labels: app: zk node: node0 spec: hostname: zk-0 volumes:

  • name: zk-data hostPath: path: /data/zk-cluster/zk-data-0
  • name: zk-logs hostPath: path: /data/zk-cluster/zk-logs-0 containers:
    • name: zk-0 image: zookeeper imagePullPolicy: IfNotPresent volumeMounts:
  • name: zk-data readOnly: false mountPath: "/data/zk-data"
  • name: zk-logs readOnly: false mountPath: "/data/zk-logs" ports:
  • containerPort: 2181
  • containerPort: 2888
  • containerPort: 3888

    command: ['tail', '-f', '/etc/hosts']

    env:

  • name: ZOO_MY_ID value: '0'
  • name: ZOO_SERVERS

    注意！！k8s使用到virtual ip，因此，本机必须使用0.0.0.0 ip地址，否则本机zk启动会异常：

    ERROR [zk1/10.0.0.251:3888:QuorumCnxManager$Listener@547] - Exception while listening

    java.net.BindException: Address not available (Bind failed)错误

    value: server.0=0.0.0.0:2888:3888 server.1=zk-1:2888:3888 server.2=zk-2:2888:3888

  • name: ZOO_DATA_DIR value: '/data/zk-data'
  • name: ZOO_DATA_LOG_DIR value: '/data/zk-logs'

---

kind: Deployment apiVersion: extensions/v1beta1 metadata: name: zk-1 spec: replicas: 1 template: metadata: labels: app: zk node: node1 spec: hostname: zk-1 volumes:

• name: zk-data hostPath: path: /data/zk-cluster/zk-data-1
• name: zk-logs hostPath: path: /data/zk-cluster/zk-logs-1 containers:
  • name: zk-1 image: zookeeper imagePullPolicy: IfNotPresent volumeMounts:
• name: zk-data readOnly: false mountPath: "/data/zk-data"
• name: zk-logs readOnly: false mountPath: "/data/zk-logs" ports:
• containerPort: 2181
• containerPort: 2888
• containerPort: 3888

  command: ['tail', '-f', '/etc/hosts']

  env:

• name: ZOO_MY_ID value: '1'
• name: ZOO_SERVERS

  注意！！k8s使用到virtual ip，因此，本机必须使用0.0.0.0 ip地址，否则本机zk启动会异常：

    # ERROR [zk1/10.0.0.251:3888:QuorumCnxManager$Listener@547] - Exception while listening
    # java.net.BindException: Address not available (Bind failed)错误
    value: server.0=zk-0:2888:3888 server.1=0.0.0.0:2888:3888 server.2=zk-2:2888:3888

• name: ZOO_DATA_DIR value: '/data/zk-data'
• name: ZOO_DATA_LOG_DIR value: '/data/zk-logs'

---

kind: Deployment apiVersion: extensions/v1beta1 metadata: name: zk-2 spec: replicas: 1 template: metadata: labels: app: zk node: node2 spec: hostname: zk-2 volumes:

• name: zk-data hostPath: path: /data/zk-cluster/zk-data-2
• name: zk-logs hostPath: path: /data/zk-cluster/zk-logs-2 containers:
  • name: zk-2 image: zookeeper imagePullPolicy: IfNotPresent volumeMounts:
• name: zk-data readOnly: false mountPath: "/data/zk-data"
• name: zk-logs readOnly: false mountPath: "/data/zk-logs" ports:
• containerPort: 2181
• containerPort: 2888
• containerPort: 3888

  command: ['tail', '-f', '/etc/hosts']

  env:

• name: ZOO_MY_ID value: '2'
• name: ZOO_SERVERS

  注意！！k8s使用到virtual ip，因此，本机必须使用0.0.0.0 ip地址，否则本机zk启动会异常：

    # ERROR [zk1/10.0.0.251:3888:QuorumCnxManager$Listener@547] - Exception while listening
    # java.net.BindException: Address not available (Bind failed)错误
    value: server.0=zk-0:2888:3888 server.1=zk-1:2888:3888 server.2=0.0.0.0:2888:3888

• name: ZOO_DATA_DIR value: '/data/zk-data'
• name: ZOO_DATA_LOG_DIR value: '/data/zk-logs'