zookeeper Pseudo-Distributed Architecture

1. Get the zookeeper binary package, address[ https://www.apache.org/dyn/closer.cgi/zookeeper/](https://www.apache.org/dyn/closer.cgi/zookeeper/
   The current stable version is 3.4.14
2. Unzip the file to a custom directory, where I unzip it to / opt/zookeeper

   # tar -xf zookeeper-3.4.14.tar.gz -C /opt/ # cd /opt/ # mv zookeeper-3.4.14/ zookeeper

3. Go into the zookeeper configuration file directory (/ opt/zookeeper/conf), and create three configuration files, zoo1. cfg, zoo2. cfg, zoo3. cfg. The configuration file can be modified by the default zoo_sample.cfg, the contents of which are as follows
   zoo1.cfg:

   # grep -E -v '^#.*|^$' zoo1.cfg tickTime=2000 #The default heartbeat time between CS is 2 seconds initLimit=10 #Maximum number of heartbeats tolerated by follower and leader servers initially connected in a cluster syncLimit=5 #Maximum tolerable heartbeat number of requests and responses between follower and leader servers in a cluster dataDir=/opt/zookeeper/Server1/data #This directory is used to store myid information and some versions, etc. dataLogDir=/opt/zookeeper/Server1/log #Log directory clientPort=2181 #The default port for client connection is 2181 maxClientCnxns=6000 #maximum connection maxSessionTimeout=60000 #Session Overtime server.1=test3:2888:3888 #Cluster configuration information server.N = HHHH: A: B N server number, HHH server address, A means the communication port between flower and leader, default 2888, B means the election port, default 3888 server.2=test3:2788:3788 server.3=test3:2688:3688

   zoo2.cfg:

   tickTime=2000 initLimit=10 syncLimit=5 dataDir=/opt/zookeeper/Server2/data dataLogDir=/opt/zookeeper/Server2/log clientPort=2182 server.1=test3:2888:3888 server.2=test3:2788:3788 server.3=test3:2688:3688

   zoo3.cfg

   tickTime=2000 initLimit=10 syncLimit=5 dataDir=/opt/zookeeper/Server3/data dataLogDir=/opt/zookeeper/Server3/log clientPort=2183 server.1=test3:2888:3888 server.2=test3:2788:3788 server.3=test3:2688:3688

4. Create corresponding data directories and log directories

   # mkdir -pv /opt/zookeeper/Server/

5. Create the file myid in the folder specified by dataDir. The content of the myid file is the id number of the corresponding server, ranging from 0 to 255

   # echo 1 > opt/zookeeper/Server1/data/myid # echo 2 > opt/zookeeper/Server2/data/myid # echo 3 > opt/zookeeper/Server3/data/myid

6. Add PATH environment variables

   # vi /etc/profile.d/zookeeper.sh export ZOOKEEPER_HOME=/opt/zookeeper export PATH=$PATH:$ZOOKEEPER_HOME # . /etc/profile.d/zookeeper.sh

7. Start zookeeper with different configuration files

   # zkServer.sh start /opt/zookeeper/conf/zoo1.cfg # zkServer.sh start /opt/zookeeper/conf/zoo2.cfg # zkServer.sh start /opt/zookeeper/conf/zoo3.cfg

8. View zookeeper status

   # zkServer.sh status /opt/zookeeper/conf/zoo1.cfg # zkServer.sh status /opt/zookeeper/conf/zoo2.cfg # zkServer.sh status /opt/zookeeper/conf/zoo3.cfg

9. Matters needing attention

• Do not set three port numbers to the same
• Every dataDir directory has myid files
• Each myid file should correspond to a number followed by server in zoo.cfg

8 April 2019, 23:00 | Views: 1489