安装zookeeper

#在全部节点上执行

#添加主机记录，根据实际情况修改IP地址和主机名
cat >> /etc/hosts <<EOF
192.168.0.61 vs1
192.168.0.62 vs2
192.168.0.63 vs3
EOF

#安装JDK
yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel​
java -version

#安装、设置防火墙
systemctl stop firewalld
systemctl disable firewalld
yum -y install iptables-services iptables iptables-utils iptables-devel
systemctl enable iptables
systemctl start iptables
#8080是storm的web端口
iptables -I INPUT -p tcp --dport 8080 -j ACCEPT
#2181是zookeeper的客户端连接端口
iptables -I INPUT -p tcp --dport 2181 -j ACCEPT
#2888是zookeeper运行时通信和数据同步的端口
iptables -I INPUT -s 192.168.0.0/24 -p tcp --dport 2888 -j ACCEPT
#3888是3888是zookeeper选举Leader的投票通信端口
iptables -I INPUT -s 192.168.0.0/24 -p tcp --dport 3888 -j ACCEPT
#6700-6703是storm的supervisor监听端口号
iptables -I INPUT -p tcp --dport 6700:6703 -j ACCEPT
service iptables save

#安装ZooKeeper
cd ~ 
wget http://apache.fayea.com/zookeeper/zookeeper-3.4.8/​
tar -xzvf zookeeper-3.4.8.tar.gz
mv zookeeper-3.4.8 /usr/local/share
cd /usr/local/share
ln -s zookeeper-3.4.8 zookeeper
cat > /etc/profile.d/zookeeper.conf <<EOF
export PATH=\$PATH:/usr/local/share/zookeeper/bin

EOF

source /etc/profile.d/zookeeper.conf
mkdir /usr/local/share/zookeeper/data
cat > /usr/local/share/zookeeper/conf/zoo.cfg <<EOF
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/usr/local/share/zookeeper/data
clientPort=2181
server.1=vs1:2888:3888
server.2=vs2:2888:3888
server.3=vs3:2888:3888
EOF

#只在vs1上执行
echo 1 > /usr/local/share/zookeeper/data/myid

#只在vs2上执行
echo 2 > /usr/local/share/zookeeper/data/myid

#只在vs3上执行
echo 3 > /usr/local/share/zookeeper/data/myid

#在全部节点上执行ZooKeeper
zkServer.sh start

#等半分钟左右，查看ZooKeeper状态
zkServer.sh status

# 主节点输出如下
# ZooKeeper JMX enabled by default
# Using config: /usr/local/share/zookeeper/bin/../conf/zoo.cfg
# Mode: leader

# 从节点输出如下：
# ZooKeeper JMX enabled by default
# Using config: /usr/local/share/zookeeper/bin/../conf/zoo.cfg
# Mode: follower