CDH4 journalnode方式手工安装手册之一

一、                                环境部署概况

 

cdh-master	172.168.10.251
cdh-node1	172.168.10.251
cdh-node2	172.168.10.251

三台服务器已按照CDH4 RPM方式安装hadoop，还包括SSH联机，保证三台机器无需密码即可切换用户。

搭建两台NAMENODE机器 分别部署在cdh-master和cdh-node1上

同时有三台journalnode用来存储namenode元数据

有三台zookeeper组成的集群用来管理namenode的状态（active或者standby）

当active的namnode出现问题时，standby节点立刻投入使用

有一台datanode节点，部署在cdh-node2上

启动顺序为：

1、 启动zookeeper，每台机器

2、 启动journalnode，每台机器

3、 启动hadoop，每台机器，包括namenode和datanode

4、 启动zkfs，每台namenode机器

二、                                搭建zookeeper

 

yum install zookeeper

在/usr/lib/zookeeper/conf/（不同安装方式路径不同）中添加如下配置：

[root@cdh-node1 conf]# more zoo.cfg

# Licensed to the Apache Software Foundation (ASF) under one or more

# contributor license agreements.  See the NOTICE file distributed with

# this work for additional information regarding copyright ownership.

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License.  You may obtain a copy of the License at

#

#     http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

maxClientCnxns=50

# 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.

dataDir=/var/lib/zookeeper

# the port at which the clients will connect

clientPort=2181

#server.1=172.168.10.251:2888:3888

#server.2=172.168.10.252:2888:3888

#server.3=172.168.10.253:2888:3888

server.1=cdh-master:2888:3888

server.2=cdh-node1:2888:3888

server.3=cdh-node2:2888:3888

在各个机器中建立文件/var/lib/zookeeper/myid（不同安装方式路径不同）  --myid中的数字代表当前机器在集群中的编号

cdh-master 中输入1   --要和上面对应

cdh-node1 中输入2

cdh-node2 中输入3

启动每台机器的zookeeper服务

./bin/zkServer.sh start

检查各个机器的启动情况

echo ruok | nc ocdata192181

echo ruok | nc ocdata172181

echo ruok | ncocdata18 2181

如果都返回imok 则代表zookeeper搭建成功