zookeeper 事物

zookeeper
英 [?zu:ki:p?(r)] 美 ['zu:ki:p?r]
n. 动物园管理员

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　　前期准备

1.修改linux主机名，每台都得配置
vim /etc/sysconfig/network

networking=yes
hostname=hadoop-server1

2.修改ip /etc/sysconfig/network-scripts/ifcfg-eth0

3.修改主机名和ip的映射关系
vim /etc/hosts

192.168.146.181 hadoop-server1
192.168.146.182 hadoop-server2
192.168.146.183 hadoop-server3
192.168.146.184 hadoop-server4
192.168.146.185 hadoop-server5
######注意######如果你们公司是租用的服务器或是使用的云主机（如华为用主机、阿里云主机等）
/etc/hosts里面要配置的是内网ip地址和主机名的映射关系

4.关闭防火墙
#查看防火墙状态
service iptables status
#关闭防火墙
service iptables stop
#查看防火墙开机启动状态
chkconfig iptables --list
#关闭防火墙开机启动
chkconfig iptables off

前4步用root用户操作，操作完后重启机器
5.ssh免登陆hadoop用户操作
#生成ssh免登陆密钥
#进入到我的home目录
cd ~/.ssh

ssh-keygen -t rsa （四个回车）
执行完这个命令后，会生成两个文件id_rsa（私钥）、id_rsa.pub（公钥）
将公钥拷贝到要免密登陆的目标机器上
ssh-copy-id hadoop-server2

6.安装jdk，配置环境变量等root用户操作
vim /etc/proflie
export java_home=/usr/java/jdk1.7.0_65
export hadoop_home=/itcast/hadoop-2.4.1
export path=$path:$java_home/bin:$hadoop_home/bin:$hadoop_home/sbin

source /etc/profile

集群规划：
主机名 ip 安装软件 运行进程
hadoop-server1 192.168.146.181:jdk、hadoop
namenode resourcemanage
dfszkfailovercontroller(zkfc)
hadoop-server2 192.168.146.182:jdk、hadoop
namenode resourcemanage
dfszkfailovercontroller(zkfc)
hadoop-server3 192.168.146.183:jdk、hadoop、zookeeper
datanode nodemanage
journalnode quorumpeermain
hadoop-server4 192.168.146.184:jdk、hadoop、zookeeper
datanode nodemanage
journalnode quorumpeermain
hadoop-server5 192.168.146.185:jdk、hadoop、zookeeper
datanode nodemanage
journalnode quorumpeermain

安装步骤：
1.安装配置zooekeeper集群（在hadoop-server3上）
1.1解压
tar -zxvf zookeeper-3.4.5.tar.gz -c /home/hadoop/app/
1.2修改配置
cd /home/hadoop/app/zookeeper-3.4.5/conf/
cp zoo_sample.cfg zoo.cfg
vim zoo.cfg
修改：datadir=/home/hadoop/app/zookeeper-3.4.5/data
在最后添加：
server.1=hadoop-server3:2888:3888
server.2=hadoop-server4:2888:3888
server.3=hadoop-server5:2888:3888
保存退出
然后创建一个tmp文件夹
mkdir /home/hadoop/app/zookeeper-3.4.5/data
再创建一个空文件
touch /home/hadoop/app/zookeeper-3.4.5/data/myid
最后向该文件写入id
echo 1 > /home/hadoop/app/zookeeper-3.4.5/data/myid
1.3将配置好的zookeeper拷贝到其他节点
scp -r /home/hadoop/app/zookeeper-3.4.5/ weekend06:/home/hadoop/app/
scp -r /home/hadoop/app/zookeeper-3.4.5/ weekend07:/home/hadoop/app/

注意：修改hadoop-server4、hadoop-server5对应/home/hadoop/app/zookeeper-3.4.5/data/myid内容
hadoop-server4：
echo 2 > /home/hadoop/app/zookeeper-3.4.5/data/myid
hadoop-server5：
echo 3 > /home/hadoop/app/zookeeper-3.4.5/data/myid

2.安装配置hadoop集群（在hadoop-server1上操作）
2.1解压
tar -zxvf hadoop-2.4.1.tar.gz -c /weekend/
2.2配置hdfs（hadoop2.0所有的配置文件都在$hadoop_home/etc/hadoop目录下）
#将hadoop添加到环境变量中
vim /etc/profile
export java_home=/hadoop/home/app/jdk1.7.0_55
export hadoop_home=/home/hadoop/app/hadoop-2.4.1
export path=$path:$java_home/bin:$hadoop_home/bin

#hadoop2.0的配置文件全部在$hadoop_home/etc/hadoop下
cd /home/hadoop/app/hadoop-2.4.1/etc/hadoop

2.2.1修改hadoo-env.sh
export java_home=/home/hadoop/app/jdk1.7.0_55

2.2.2修改core-site.xml



fs.defaultfs
hdfs://ns1/



hadoop.tmp.dir
/home/hadoop/app/hadoop-2.4.1/tmp




ha.zookeeper.quorum
hadoop-server3:2181,hadoop-server3:2181,hadoop-server3:2181



2.2.3修改hdfs-site.xml



dfs.nameservices
ns1



dfs.ha.namenodes.ns1
nn1,nn2



dfs.namenode.rpc-address.ns1.nn1
hadoop-server1:9000



dfs.namenode.http-address.ns1.nn1
hadoop-server1:50070



dfs.namenode.rpc-address.ns1.nn2
weekend02:9000



dfs.namenode.http-address.ns1.nn2
hadoop-server2:50070



dfs.namenode.shared.edits.dir
qjournal://hadoop-server3:8485;hadoop-server4:8485;hadoop-server5:8485/ns1



dfs.journalnode.edits.dir
/home/hadoop/app/hadoop-2.4.1/journaldata



dfs.ha.automatic-failover.enabled
true



dfs.client.failover.proxy.provider.ns1
org.apache.hadoop.hdfs.server.namenode.ha.configuredfailoverproxyprovider



dfs.ha.fencing.methods

sshfence
shell(/bin/true)




dfs.ha.fencing.ssh.private-key-files
/home/hadoop/.ssh/id_rsa



dfs.ha.fencing.ssh.connect-timeout
30000



2.2.4修改mapred-site.xml



mapreduce.framework.name
yarn



2.2.5修改yarn-site.xml



yarn.resourcemanager.ha.enabled
true



yarn.resourcemanager.cluster-id
yrc



yarn.resourcemanager.ha.rm-ids
rm1,rm2



yarn.resourcemanager.hostname.rm1
hadoop-server1


yarn.resourcemanager.hostname.rm2
hadoop-server2



yarn.resourcemanager.zk-address
hadoop-server3:2181,hadoop-server4:2181,hadoop-server5:2181


yarn.nodemanager.aux-services
mapreduce_shuffle



2.2.6修改slaves(slaves是指定子节点的位置)
hadoop-server3
hadoop-server4
hadoop-server5