新增2个节点，并以将这两个节点命名为ceph4和ceph5为例，介绍如何配置新节点加入进群。

操作步骤

安装ZooKeeper软件包。
详情请参考安装Zookeeper。

配置新节点的myid。

将ceph4配置为4。

mkdir /opt/apache-zookeeper-3.6.3-bin-bcm/zkData
echo 4 > /opt/apache-zookeeper-3.6.3-bin-bcm/zkData/myid

将ceph5配置为5。

mkdir /opt/apache-zookeeper-3.6.3-bin-bcm/zkData
echo 5 > /opt/apache-zookeeper-3.6.3-bin-bcm/zkData/myid

在2个新节点修改“zoo.cfg”配置文件。

打开文件。

1	vim /opt/apache-zookeeper-3.6.3-bin-bcm/conf/zoo.cfg

按“i”键进入编辑模式，参照如下内容进行修改。

# The number of milliseconds of each tick
tickTime=1000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=2
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/opt/apache-zookeeper-3.6.3-bin-bcm/zkData
# the port at which the clients will connect
clientPort=2182
# the maximum number of client connections.
# increase this if you need to handle more clients
maxClientCnxns=333
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
autopurge.purgeInterval=3

## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
server.80=ceph1:2889:3889;2182
server.90=ceph2:2889:3889;2182
server.100=ceph3:2889:3889;2182
server.4=ceph4:2889:3889;2182
server.5=ceph5:2889:3889;2182
4lw.commands.whitelist=*

按“Esc”键退出编辑模式，输入:wq!并按“Enter”键保存退出文件。

在2个新节点重启ZooKeeper服务。

1	/opt/apache-zookeeper-3.6.3-bin-bcm/bin/zkServer.sh start

在2个新节点查询ZooKeeper服务状态。

1	/opt/apache-zookeeper-3.6.3-bin-bcm/bin/zkServer.sh status

回显如下所示。

ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.3-bin-bcm/bin/../conf/zoo.cfg
Client port found: 2182. Client address: localhost. Client SSL: false.
Mode: follower

集群内加入新节点

操作步骤