1. Install zookeeper on centos7
1. Update your system's package manager with the following command:
sudo yum update2. Use the following command to install JDK:
sudo yum install java-1.8.0-openjdk-devel3. Use the following command to download ZooKeeper on the Apache website:
wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gzIf you need other versions of zookeeper or report that there is no such resource, go to
https://downloads.apache.org/zookeeper/
Query the version you need, just change the link.
4. Unzip ZooKeeper with the following command:
tar -xvf apache-zookeeper-3.7.0-bin.tar.gz5. Rename the decompressed directory to "zookeeper":
mv apache-zookeeper-3.7.0-bin zookeeper6. Create the ZooKeeper data directory:
sudo mkdir /var/lib/zookeeper/data
sudo mkdir /var/lib/zookeeper/logs7. Create a ZooKeeper configuration file:
sudo nano zookeeper/conf/zoo.cfgThe usage of the Nano command can be Baidu, or you can use the vi command
Add the following lines of code to the file:
tickTime=2000
dataDir=/var/lib/zookeeper/data
dataLogDir=/var/lib/zookeeper/logs
clientPort=2181These settings configure the ZooKeeper tick time (in milliseconds), the data directory where ZooKeeper stores data, and the client ports that ZooKeeper listens on.
8. Start ZooKeeper with the following command:
zookeeper/bin/zkServer.sh start9. Use the following command to check whether ZooKeeper is running:
./zkServer.sh status
##或者
zookeeper/bin/zkCli.shAs for whether the original zookeeper needs to be uninstalled, I personally think that it has little impact.
2. Build a zookeeper cluster
1. Follow the steps provided earlier to install and configure ZooKeeper on each node in the cluster. Assign each node in the cluster a unique ID by creating a file named "myid" in each node's ZooKeeper data directory. ID.
For example, if the ID of the first node is 1, create a file named "/var/lib/zookeeper/data/myid" on that node with the content "1" (without quotes). Be sure to put it under data, otherwise it will report an error that the myid file cannot be found.
Edit the ZooKeeper configuration file on each node to include a list of all nodes in the cluster. Open the configuration file (default is /opt/zookeeper/conf/zoo.cfg), add a line for each node, the format is as follows:
server.<ID>=<hostname>:2888:3888<ID> is replaced with the ID number of the node, <hostname> is replaced with the host name or IP address of the node, 2888 is replaced with the port number of ZooKeeper point-to-point communication, and 3888 is replaced with the port number of the leader election. For example, if the ID of the first node is 1, the host name is "zookeeper1", and the ip is "192.168.211.136", add the following line to the configuration file:
server.1=zookeeper:2888:3888
##或
server.1=192.168.111.136:2888:3888
##若有3台服务器，则需要添加三行：
server.1=192.168.111.136:2888:3888
server.2=192.168.111.135:2888:3888
server.3=192.168.111.134:2888:3888Note: Do not leave a blank line after adding
2. Start the zookeeper service of each server separately
/opt/zookeeper/zookeeper/bin/zkServer.sh start3. View status
/opt/zookeeper/zookeeper/bin/zkServer.sh statusRunning status follower is the slave server leader is the master server node
3. If you are using a virtual machine, you also need to pay attention to the following configurations:
1. Centos cannot be connected to the Internet under the virtual machine
1. First adjust the network adapter of the virtual machine to NAT mode
2. Set the "Edit" of the virtual machine --> "Virtual Network Editor" in the DHCP settings of VMnet8 and both options are checked.
The default is ticked
3. Open the VMware DHCP Service and VMware NAT Service services of the physical host in CMD (running as an administrator), command
net start "VMware DHCP Service"
net start "VMware NAT Service"4. CentOS does not start the network card by default, it needs to be started manually
cd /etc/sysconfig/network-scripts/ls Check the corresponding number behind ifcfg-eno, take ens33 as an example
Switch to the root user,
vi ifcfg-ens33edit the file settings
ONBOOT=yes5. Restart
service NetworkManager stop
service network restart
service NetworkManager start2. Configure static IP
Because each restart of the virtual machine may cause the IP to change, you need to do some configuration
vi /etc/sysconfig/network-scripts/ifcfg-ens33Set BOOTPROTO to static
Then add the two values ip and subnet mask below
IPADDR=192.168.158.131 (fill in your ip) #IP address
NETMASK=255.255.255.0 (fill in your mask value) #mask value
GATEWAY=192.168.111.1 (default gateway) View in virtual machine-edit-virtual network editor
DNS1=Same as GATEWAY
Check the subnet IP and click Edit --> Virtual Network Editor
