毕业设计准备篇一——环境搭建

经过四年的学习和实战经验，打算做一个可以融合大多数学习的知识的毕业设计，所以就给自己的毕设取名：（分布式）桌面化多媒体网站系统。系统采用的构架如图1所示。

图1 系统架构

其中数据库集群目前采用mysql集群，为什么呢，因为目前mysql使用率还是很大的，而且mysql官方文档详细，最大的原因是因为自己笔记本配置不够高，不能搭建oracle集群。业务集群和WEB集群使用dubbo来实现远程调用及服务治理。

本篇文档的主要内容是记录毕设准备工作——环境搭建。

环境搭建

1、Linux环境配置

我使用的Linux版本是Ubuntu 14.10，安装在自己电脑的虚拟机中，分配了三个网卡。每个虚拟机和实体机都属于同一个局域网，同时使用虚拟机的内部网卡构建内部虚拟网络。如图2所示。用户使用SSH证书登录（略）。

图2 主机拓扑图

2、Memcached

memcached使用的是官方下载的源码包，然后进行编译安装。获取最新的源码包：wget http://memcached.org/latest。

解压：tar -zxvf latest

安装依赖：sudo apt-get install gcc

sudo apt-get install icc-profiles

sudo apt-get install sasl2-bin

wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz

安装：./configure && make && make test && sudo make install

启动：/usr/local/bin/memcached -d -m 1024 -u root -p 11211 -P /tmp/memcached.pid

为了让memcache开机启动，为它写启动脚本，脚本内容如下：

#!/bin/sh

# memcached: MemCached ROOT

# chkconfig: - 90 25

# description: MemCached ROOT

# Source function library.

#. /etc/rc.d/init.d/functions

#. /etc/sysconfig/network

start()

{

echo -n $"Starting memcached: "

/usr/local/bin/memcached -u root -d -m 4096 -p 11211

echo

}

stop()

{

echo -n $"Shutting down memcached: "

kill -9 `pgrep memcached`

echo

}

[ -f /usr/local/bin/memcached ] || exit 0

# See how we were called.

case "$1" in

start)

start

;;

stop)

stop

;;

restart|reload)

stop

start

;;

condrestart)

stop

start

;;

echo $"Usage: $0 {start|stop|restart|reload|condrestart}"

exit 1

esac

exit 0

3、Zookeeper

下载：wget http://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz

解压：tar -zxvf zookeeper-3.4.6.tar.gz

修改配置：mv zoo_sample.cfg zoo.cfg

vim zoo.cfg

配置内容为：

# 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/zookeeper/data

# 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

4、服务管理器安装

安装：sudo apt-get install chkconfig

sudo apt-get install chkrunlevel

sudo dpkg -i chkconfig_11.0-79.1-2_all.deb

sudo ln -s /usr/lib/insserv/insserv /sbin/insserv

添加服务：
sudo chkconfig --add memcached

sudo chkconfig --level 2345 memcached on

chkconfig --list memcached

sudo chkconfig --add zookeeper

5、svn服务器安装

安装：sudo apt-get install subversion

sudo apt-get install apache2-utils

sudo apt-get install apache2

搭建工作：

sudo adduser svnuser

sudo addgroup subversion

sudo addgroup svnuser subversion

sudo mkdir /home/svn

sudo apt-get install libapache2-svn

sudo svnadmin create /home/svn/studio

svnserve -d -r /home/svn/studio/

sudo vim /etc/apache2/mods-available/dav_svn.conf

sudo htpasswd -c /home/svn/project/conf/passwd wms

sudo chown -R www-data:www-data /home/svn/studio/

sudo make-ssl-cert /usr/share/ssl-cert/ssleay.cnf /home/svn/apache2_svn_ssl.pem

sudo a2enmod ssl

6、MySQL集群

集群主要是配置文件很复杂，搞了很久才搞定。一下是配置文件：

Config.ini

# Configuration file for MyCluster

[NDB_MGMD DEFAULT]

Portnumber=1186

[NDB_MGMD]

NodeId=1

HostName=192.168.56.102

DataDir=/home/data/mysql-cluster/1/

Portnumber=1186

[TCP DEFAULT]

SendBufferMemory=4M

ReceiveBufferMemory=4M

[NDBD DEFAULT]

BackupMaxWriteSize=1M

BackupDataBufferSize=16M

BackupLogBufferSize=4M

BackupMemory=20M

BackupReportFrequency=10

MemReportFrequency=30

LogLevelStartup=15

LogLevelShutdown=15

LogLevelCheckpoint=8

LogLevelNodeRestart=15

DataMemory=1M

IndexMemory=1M

MaxNoOfTables=4096

MaxNoOfTriggers=3500

NoOfReplicas=2

StringMemory=25

DiskPageBufferMemory=64M

SharedGlobalMemory=20M

LongMessageBuffer=32M

MaxNoOfConcurrentTransactions=16384

BatchSizePerLocalScan=512

FragmentLogFileSize=64M

NoOfFragmentLogFiles=16

RedoBuffer=32M

MaxNoOfExecutionThreads=2

StopOnError=false

LockPagesInMainMemory=1

TimeBetweenEpochsTimeout=32000

TimeBetweenWatchdogCheckInitial=60000

TransactionInactiveTimeout=60000

HeartbeatIntervalDbDb=15000

HeartbeatIntervalDbApi=15000

[NDBD]

NodeId=21

HostName=192.168.56.102

DataDir=/home/data/mysql-cluster/21/

[NDBD]

NodeId=22

HostName=192.168.56.103

DataDir=/home/data/mysql-cluster/22/

[MYSQLD DEFAULT]

[MYSQLD]

NodeId=41

HostName=192.168.56.102

[MYSQLD]

NodeId=42

HostName=192.168.56.103

[API]

NodeId=61

HostName=192.168.56.102

[API]

NodeId=62

HostName=192.168.56.103

My.cnf

[mysqld]

#不再进行反解析（ip不反解成域名），这样可以加快数据库的反应时间

skip-name-resolve

log-error=mysqld.42.err

datadir="/home/data/mysql-cluster/42/"

tmpdir="/home/data/mysql-cluster/42/tmp"

basedir="/home/mysql/mysql-cluster/bin/"

port=3306

ndbcluster=on

ndb-nodeid=42

ndb-connectstring=127.0.0.1:1186,

socket="/home/data/mysql-cluster/42/mysql.socket"

解决不能通过mysql.sock连接MySQL问题这个问题主要提示是，不能通过 '/tmp/mysql.sock'连到服务器，而php标准配置正是用过'/tmp/mysql.sock'，但是一些mysql 安装方法将 mysql.sock放在/var/lib/mysql.sock或者其他的什么地方，用这样的方法:
　　ln -s /var/lib/mysql /mysql .sock /tmp/mysql.sock

成功了,就是这样ln -s /var/lib/mysql /mysql .sock /tmp/mysql.sock

/home/mysql/mysql-cluster/bin/ndb_mgmd --initial --ndb-nodeid=1 --config-dir=/home/data/mysql-cluster/1 --config-file=/home/data/mysql-cluster/1/config.ini

/home/mysql/mysql-cluster/bin/ndbd --ndb-nodeid=22 --ndb-connectstring=192.168.56.102:1186

/home/mysql/mysql-cluster/scripts/mysql_install_db --user=wms --datadir=/home/data/mysql-cluster/42/

/home/mysql/mysql-cluster/bin/mysqld_safe --defaults-file=/home/data/mysql-cluster/41/my.cnf --basedir=/home/mysql/mysql-cluster/ --log-error=/home/data/mysql-cluster/41/error.log --user=wms &