Prerequisites: Before setting up the Zookeeper cluster, ensure that the Hadoop cluster is set up. Refer to the white bearA0-02.Hadoop cluster construction

1. Set up the Zookeeper cluster

  • MyNode01 machine (iceBear user)
    • Downloading the Installation package
      • Zookeeper.apache.org/releases.ht…
    • Upload and decompress the ZooKeeper installation package
      • cd /home/bgd/soft
      • Tar -zxvf zookeeper-3.4.5-cdh5.14.2.tar.gz -c /home/bg/install /
    • Modifying a Configuration File
      • CD/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / conf
      • cp zoo_sample.cfg zoo.cfg
      • The mkdir -p/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / zkdatas
      • vim zoo.cfg 
        # to add the following configuration dataDir = / home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / zkdatas autopurge. SnapRetainCount = 3 autopurge.purgeInterval=1 server.1=MyNode01:2888:3888 server.2=MyNode02:2888:3888 server.3=MyNode03:2888:3888Copy the code
    • Distribute the configured ZooKeeper to other machines
      • cd /home/bgd/install
      • Sudo SCP -r zookeeper-3.4.5-cdh5.14.2/ MyNode02:$PWD
      • Sudo SCP -r zookeeper-3.4.5-cdh5.14.2/ MyNode03:$PWD
    • Configuring environment Variables
      • sudo vim /etc/profile 
        JAVA_HOME = / home/BGD/install/jdk1.8.0 _141 HADOOP_HOME = / home/BGD/install/hadoop - server - cdh5.14.2 # the add ZK_HOME = / home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$ZK_HOME/bin export JAVA_HOME export HADOOP_HOME Export ZK_HOME export PATHCopy the code
    • Distribute the configured environment variables to other machines
      • sudo scp /etc/profile MyNode02:/etc/
      • sudo scp /etc/profile MyNode03:/etc/
  • Add myID and put the environment variable into effect
    • MyNode01 (iceBear user)
      • Echo 1 > / home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / zkdatas/myid
      • source /etc/profile
    • MyNode02 (iceBear user)
      • Echo 2 > / home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / zkdatas/myid
      • source /etc/profile
    • MyNode03 (iceBear user)
      • Echo 3 > / home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / zkdatas/myid
      • source /etc/profile

2. Enable or disable the ZooKeeper cluster

  • All machines executed separately (IceBear users)
    • open
      • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh start
    • To view
      • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh status
    • stop
      • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh stop
    • restart
      • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh restart
    • View error logs
      • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh start - foreground
  • MyNode01 machine (iceBear user)
    • A key to opensudo bash zk_start.sh 
      #! / bin/sh for host in MyNode01 MyNode02 MyNode03 do SSH $host "/ home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh  start" echo "$host ZK is running" doneCopy the code
    • A key to seesudo bash zk_status.sh 
      #! / bin/sh for host in MyNode01 MyNode02 MyNode03 do SSH $host "/ home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh  status" echo "$host" doneCopy the code
    • A button to turn off thesudo bash zk_stop.sh 
      #! / bin/sh for host in MyNode01 MyNode02 MyNode03 do SSH $host "/ home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh  stop" echo "$host ZK is stoped" doneCopy the code

3. View the cluster

Four, error detection

  • See the log
    • Sudo/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh start - foreground
  • If the Zookeeper cluster fails to start
    • Modify zkServer. Sh
      • Sudo vim/home/BGD/install/zookeeper - 3.4.5 - cdh5.14.2 / bin/zkServer. Sh 
        Add source /etc/profileCopy the code
    • Restart the cluster again