Ubuntu16.04安装配置ZooKeeper集群

本文参照http://www.zhangyitian.cn/blog/ubuntu16-04%E5%AE%89%E8%A3%85%E9%85%8D%E7%BD%AEzookeeper%E9%9B%86%E7%BE%A4/ 此篇文章而写。

集群环境：

计算机节点	IP地址
A	192.168.2.101
B	192.168.2.102
C	192.168.2.104

JDK版本：java version "1.8.0_144"

 

准备工作

关闭防火墙：

yitian@ubuntu:~/zookeeper/zookeeper-3.4.10/conf$ sudo ufw disable

Firewall stopped and disabled on system startup

1、下载ZooKeeper

下载地址：https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/

这里下载的版本为3.4.10（2017-10-04）

配置ZooKeeper（每个主机）

2、修改配置文件：

1）. 在/zookeeper-3.4.10/conf/目录下，复制zoo_sample.cfg为zoo.cfg，并将zoo_sample.cfg删除

2）. 编辑zoo.cfg文件：

# The number of milliseconds of each tick

tickTime=2000

# 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=5

# the directory where the snapshot is stored.

# do not use /tmp for storage, /tmp here is just

# example sakes.

dataDir=/home/xxx/zookeeper/data # zookeeper的DATA文件路径，在zookeeper集群环境下，需要在该路径下配置不同的myid文件

dataLogDir=/home/xxxx/zookeeper/logs

# the port at which the clients will connect

clientPort=2181

# the maximum number of client connections.

# increase this if you need to handle more clients

#maxClientCnxns=60

#

# 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=1

在文件末尾添加：

server.1=heron01:2888:3888 # 这里使用三台主机的ip（这句注释不要粘贴过去，否则会报错）

server.2=heron03:2888:3888

server.3=heron02:2888:3888

3. 在dataDir目录下，配置myid文件

在之前设置的dataDir（/home/yitian/zookeeper/data # zookeeper）中新建myid文件, 写入一个数字, 该数字表示这是第几号server. 该数字必须和zoo.cfg文件中的server.X中的X一一对应.并且同一集群内每个节点的数字是不相同的。

heron02中myid文件内容:

han@heron02:~/zookeeper/data$ cat myid

1

heron01中myid文件内容：

wang@heron01:~/zookeeper/data$ cat myid

3

heron03中myid文件内容：

 

lin@heron03:~/zookeeper/data$ cat myid

2

启动并查看状态

1. 启动heron02

han@heron02:~/zookeeper/zookeeper-3.4.10/bin$ ./zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

yitian@ubuntu:~/zookeeper/zookeeper-3.4.10/bin$ ./zkServer.sh start

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Starting zookeeper ... already running as process 3467.

han@heron02:~/zookeeper/zookeeper-3.4.10/bin$ ./zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Mode: leader

2. 启动heron01

wang@heron01:~/zookeeper/zookeeper-3.4.10/conf$ ../bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

wang@heron01:~/zookeeper/zookeeper-3.4.10/conf$ ../bin/zkServer.sh start

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

wang@heron01:~/zookeeper/zookeeper-3.4.10/conf$ ../bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Mode: follower

3. 启动heron03

 

lin@heron03:~$ ./zookeeper/zookeeper-3.4.10/bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

lin@heron03:~$ ./zookeeper/zookeeper-3.4.10/bin/zkServer.sh start

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

lin@heron03:~$ ./zookeeper/zookeeper-3.4.10/bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /home/yitian/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg

Mode: follower

 

 

一定要学会看zookeeper.out文件，也就是日志，其中3888后面不允许跟注释，就是在文件中发现的。

 

在root用户ssh时要修改配置文件和重置root用户密码，具体如下：

修改/etc/ssh/sshd_config及配置文件：

# Authentication:

LoginGraceTime 120

# PermitRootLogin prohibit-password

PermitRootLogin yes

StrictModes yes

重置root用户密码

sudo passwd root