Install Dubbo registry (Zookeeper-3.4.6)
Dubbo recommends using Zookeeper as a registry for services.
Registry server (192.168.1.128) configuration, install Zookeeper:
1. Modify the /etc/hosts file of the operating system
Add to:
#zookeeper servers
-
192.168.1.128 localhost
In this way, the machine whose IP is 192.168.1.128 can be mapped to the corresponding domain name
2. Go to http://apache.fayea.com/zookeeper/ to download zookeeper-3.4.6:
$ yum install http://apache.fayea.com/zookeeper/zookeeper-3.4.6/
3. Unzip the zookeeper installation package:
$ tar -zxvf zookeeper-3.4.6.tar.gz
4. Create the following directories in the /home/zhaoxing/zookeeper-3.4.6 directory:
$ cd /home/zhaoxing/zookeeper-3.4.6
$ mkdir data
$ mkdir logs
5. Copy the zoo_sample.cfg file in the zookeeper-3.4.6/conf directory and name it zoo.cfg
$ cp zoo_sample.cfg zoo.cfg
6. Modify the zoo.cfg configuration file:
$ vi zoo.cfg
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks thatthe initial
# synchronization phase cantake
initLimit = 10
# The number of ticks thatcan pass between
# sending a request andgetting an acknowledgement
syncLimit=5
# the directory where thesnapshot is stored.
# do not use /tmp forstorage, /tmp here is just
# example sakes.
dataDir=/home/zhaoxing/zookeeper-3.4.6/data
# dataLogDir=/home/zhaoxing/zookeeper-3.4.6/logs
# the port at which theclients will connect
clientPort=2181
#2888,3888 are election port
server.1=localhost:2888:3888
in,
The 2888 port number is the port for communication between zookeeper services.
3888 is the port through which zookeeper communicates with other applications.
localhost是在hosts中已映射了IP的主机名。
initLimit:这个配置项是用来配置 Zookeeper 接受客户端(这里所说的客户端不是用户连接 Zookeeper服务器的客户端,而是 Zookeeper 服务器集群中连接到 Leader 的 Follower 服务器)初始化连接时最长能忍受多少个心跳时间间隔数。当已经超过 10个心跳的时间(也就是 tickTime)长度后Zookeeper 服务器还没有收到客户端的返回信息,那么表明这个客户端连接失败。总的时间长度就是5*2000=10 秒。
syncLimit:这个配置项标识 Leader 与 Follower 之间发送消息,请求和应答时间长度,最长不能超过多少个 tickTime 的时间长度,总的时间长度就是 2*2000=4 秒。
server.A=B:C:D:其中 A 是一个数字,表示这个是第几号服务器;B 是这个服务器的IP地址或/etc/hosts文件中映射了IP的主机名;C 表示的是这个服务器与集群中的 Leader 服务器交换信息的端口;D 表示的是万一集群中的 Leader 服务器挂了,需要一个端口来重新进行选举,选出一个新的 Leader,而这个端口就是用来执行选举时服务器相互通信的端口。如果是伪集群的配置方式,由于 B 都是一样,所以不同的 Zookeeper 实例通信端口号不能一样,所以要给它们分配不同的端口号。
7、在dataDir=/home/zhaoxing/zookeeper-3.4.6/data下创建myid文件
编辑myid文件,并在对应的IP的机器上输入对应的编号。如在zookeeper上,myid文件内容就是1。如果只在单点上进行安装配置,那么只有一个server.1。
$ vi myid
1
8、zhaoxing用户下修改vi /home/zhaoxing/.bash_profile,增加zookeeper配置:
# zookeeper env
export ZOOKEEPER_HOME=/home/zhaoxing/software/zookeeper-3.4.6
export PATH=$ZOOKEEPER_HOME/bin:$PATH
使配置文件生效
$ source /home/zhaoxing/.bash_profile
9、在防火墙中打开要用到的端口2181、2888、3888
切换到root用户权限,执行以下命令:
# chkconfig iptables on
# service iptables start
编辑/etc/sysconfig/iptables
# vi/etc/sysconfig/iptables
增加以下3行:
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2181 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2888 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3888 -j ACCEPT
重启防火墙:
# service iptables restart
查看防火墙端口状态:
# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
5 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2181
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2888
7 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3888
8 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
10、 启动并测试zookeeper(要用zhaoxing用户启动,不要用root):
(1)使用wusc用户到/home/wusc/zookeeper-3.4.6/bin目录中执行:
$ zkServer.sh start
(2)输入jps命令查看进程:
$ jps
1456 QuorumPeerMain
1475 Jps
其中,QuorumPeerMain是zookeeper进程,启动正常
(3)查看状态:
$ zkServer.sh status
(4)查看zookeeper服务输出信息:
由于服务信息输出文件在/home/wusc/zookeeper-3.4.6/bin/zookeeper.out
$ tail -500f zookeeper.out
11、 停止zookeeper进程:
$ zkServer.sh stop
12、 配置zookeeper开机使用wusc用户启动:
编辑/etc/rc.local文件,加入:
su - zhaoxing -c '/home/zhaoxing/sofeware/zookeeper-3.4.6/bin/zkServer.shstart'