Linux环境搭建nginx+2个tomcat+2个redis（主从复制）

╰半橙微兮° 2022-08-20 06:29 39阅读 0赞

# 实现流程图,自己画的图,容易理解。 #

![这里写图片描述][20160212003455455]

> 先来搭建nginx-1.9.11

1.先本地下载nginx,从本地上传nginx-1.9.11.tar.gz到centos服务器上

pscp C:\Users\Administrator\Desktop\linux版本\nginx
    -1.9.11.tar.gz  root@115.29.144.131:/root

2.解压后得到以下目录

tar -zxvf  nginx-1.9.11.tar.gz

![20160211220820066][]  
3.安装nginx前,要确保系统安装了g++、gcc、openssl-devel、pcre-devel和zlib-devel软件

yum install gcc-c++
    yum -y install zlib zlib-devel openssl openssl--devel pcre pcre-devel

4.检查系统安装的nginx：

find -name nginx

5.删除系统额nginx

yum remove nginx

6.安装nginx

cd nginx-1.9.11
    ./configure --prefix=/usr/local/nginx
    make
    make install

7.启动nginx

#方法1
    [root@admin nginx-1.9.11]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
    #方法2
    [root@admin nginx-1.9.11]# cd /usr/local/nginx/sbin
    [root@admin sbin]# ./nginx

8.停止与重启ngxin

停止
    #查询nginx主进程号
    ps -ef | grep nginx
    #停止进程
    kill -QUIT 主进程号
    #快速停止
    kill -TERM 主进程号
    #强制停止
    pkill -9 nginx
    重启
    [root@admin local]# /usr/local/nginx/sbin/nginx -s reload

[nginx安装失败请参考这里][nginx]

--------------------

> Centos环境搭建两个tomcat8 [请点击这里][Link 1]

--------------------

> 接下来来安装redis

1.本地下载redis3.0.7.tar.gz,上传到linux服务器

pscp C:\Users\Administrator\Desktop\linux版本\redis
    -3.0.7.tar.gz  root@115.29.144.131:/root

2.编译redis

tar zxvf redis3.0.7.tar.gz,
    cd redis3.0.7
    make

make命令执行完成后，会在src目录下生成5个可执行文件，分别是redis-server、redis-cli、redis-benchmark、redis-check-aof、redis-check-dump  
作用：

redis-server：Redis服务器的daemon启动程序  
redis-cli：Redis命令行操作工具。当然，你也可以用telnet根据其纯文本协议来操作  
redis-benchmark：Redis性能测试工具，测试Redis在你的系统及你的配置下的读写性能  
redis-check-aof：更新日志检查

redis-check-dump：用于本地数据库检查  
3.安装

make PREFIX=/usr/local install

4.配置 Redis

> 修改redis.conf文件的内容,这里给一个例子

# Redis configuration file example
    
    # By default Redis does not run as a daemon. Use 'yes' if you need it.
    # Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
    daemonize no
    
    # When run as a daemon, Redis write a pid file in /var/run/redis.pid by default.
    # You can specify a custom pid file location here.
    #pidfile /var/run/redis.pid
    pidfile redis.pid
    
    # Accept connections on the specified port, default is 6379
    port 6379
    
    # If you want you can bind a single interface, if the bind option is not
    # specified all the interfaces will listen for connections.
    #
    # bind 127.0.0.1
    
    # Close the connection after a client is idle for N seconds (0 to disable)
    timeout 300
    
    # Set server verbosity to 'debug'
    # it can be one of:
    # debug (a lot of information, useful for development/testing)
    # notice (moderately verbose, what you want in production probably)
    # warning (only very important / critical messages are logged)
    loglevel debug
    
    # Specify the log file name. Also 'stdout' can be used to force
    # the demon to log on the standard output. Note that if you use standard
    # output for logging but daemonize, logs will be sent to /dev/null
    logfile stdout
    
    # Set the number of databases. The default database is DB 0, you can select
    # a different one on a per-connection basis using SELECT <dbid> where
    # dbid is a number between 0 and 'databases'-1
    databases 16
    
    ################################ SNAPSHOTTING #################################
    #
    # Save the DB on disk:
    #
    # save <seconds> <changes>
    #
    # Will save the DB if both the given number of seconds and the given
    # number of write operations against the DB occurred.
    #
    # In the example below the behaviour will be to save:
    # after 900 sec (15 min) if at least 1 key changed
    # after 300 sec (5 min) if at least 10 keys changed
    # after 60 sec if at least 10000 keys changed
    save 900 1
    save 300 10
    save 60 10000
    
    # Compress string objects using LZF when dump .rdb databases?
    # For default that's set to 'yes' as it's almost always a win.
    # If you want to save some CPU in the saving child set it to 'no' but
    # the dataset will likely be bigger if you have compressible values or keys.
    rdbcompression yes
    
    # The filename where to dump the DB
    dbfilename dump.rdb
    
    # For default save/load DB in/from the working directory
    # Note that you must specify a directory not a file name.
    dir ./
    
    ################################# REPLICATION #################################
    
    # Master-Slave replication. Use slaveof to make a Redis instance a copy of
    # another Redis server. Note that the configuration is local to the slave
    # so for example it is possible to configure the slave to save the DB with a
    # different interval, or to listen to another port, and so on.
    #
    # slaveof <masterip> <masterport>
    
    # If the master is password protected (using the "requirepass" configuration
    # directive below) it is possible to tell the slave to authenticate before
    # starting the replication synchronization process, otherwise the master will
    # refuse the slave request.
    #
    # masterauth <master-password>
    
    ################################## SECURITY ###################################
    
    # Require clients to issue AUTH <PASSWORD> before processing any other
    # commands. This might be useful in environments in which you do not trust
    # others with access to the host running redis-server.
    #
    # This should stay commented out for backward compatibility and because most
    # people do not need auth (e.g. they run their own servers).
    #
    # requirepass foobared
    
    ################################### LIMITS ####################################
    
    # Set the max number of connected clients at the same time. By default there
    # is no limit, and it's up to the number of file descriptors the Redis process
    # is able to open. The special value '0' means no limts.
    # Once the limit is reached Redis will close all the new connections sending
    # an error 'max number of clients reached'.
    #
    # maxclients 128
    
    # Don't use more memory than the specified amount of bytes.
    # When the memory limit is reached Redis will try to remove keys with an
    # EXPIRE set. It will try to start freeing keys that are going to expire
    # in little time and preserve keys with a longer time to live.
    # Redis will also try to remove objects from free lists if possible.
    #
    # If all this fails, Redis will start to reply with errors to commands
    # that will use more memory, like SET, LPUSH, and so on, and will continue
    # to reply to most read-only commands like GET.
    #
    # WARNING: maxmemory can be a good idea mainly if you want to use Redis as a
    # 'state' server or cache, not as a real DB. When Redis is used as a real
    # database the memory usage will grow over the weeks, it will be obvious if
    # it is going to use too much memory in the long run, and you'll have the time
    # to upgrade. With maxmemory after the limit is reached you'll start to get
    # errors for write operations, and this may even lead to DB inconsistency.
    #
    # maxmemory <bytes>
    
    ############################## APPEND ONLY MODE ###############################
    
    # By default Redis asynchronously dumps the dataset on disk. If you can live
    # with the idea that the latest records will be lost if something like a crash
    # happens this is the preferred way to run Redis. If instead you care a lot
    # about your data and don't want to that a single record can get lost you should
    # enable the append only mode: when this mode is enabled Redis will append
    # every write operation received in the file appendonly.log. This file will
    # be read on startup in order to rebuild the full dataset in memory.
    #
    # Note that you can have both the async dumps and the append only file if you
    # like (you have to comment the "save" statements above to disable the dumps).
    # Still if append only mode is enabled Redis will load the data from the
    # log file at startup ignoring the dump.rdb file.
    #
    # The name of the append only file is "appendonly.log"
    #
    # IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
    # log file in background when it gets too big.
    
    appendonly no
    
    # The fsync() call tells the Operating System to actually write data on disk
    # instead to wait for more data in the output buffer. Some OS will really flush
    # data on disk, some other OS will just try to do it ASAP.
    #
    # Redis supports three different modes:
    #
    # no: don't fsync, just let the OS flush the data when it wants. Faster.
    # always: fsync after every write to the append only log . Slow, Safest.
    # everysec: fsync only if one second passed since the last fsync. Compromise.
    #
    # The default is "always" that's the safer of the options. It's up to you to
    # understand if you can relax this to "everysec" that will fsync every second
    # or to "no" that will let the operating system flush the output buffer when
    # it want, for better performances (but if you can live with the idea of
    # some data loss consider the default persistence mode that's snapshotting).
    
    appendfsync always
    # appendfsync everysec
    # appendfsync no
    
    ############################### ADVANCED CONFIG ###############################
    
    # Glue small output buffers together in order to send small replies in a
    # single TCP packet. Uses a bit more CPU but most of the times it is a win
    # in terms of number of queries per second. Use 'yes' if unsure.
    #glueoutputbuf yes
    
    # Use object sharing. Can save a lot of memory if you have many common
    # string in your dataset, but performs lookups against the shared objects
    # pool so it uses more CPU and can be a bit slower. Usually it's a good
    # idea.
    #
    # When object sharing is enabled (shareobjects yes) you can use
    # shareobjectspoolsize to control the size of the pool used in order to try
    # object sharing. A bigger pool size will lead to better sharing capabilities.
    # In general you want this value to be at least the double of the number of
    # very common strings you have in your dataset.
    #
    # WARNING: object sharing is experimental, don't enable this feature
    # in production before of Redis 1.0-stable. Still please try this feature in
    # your development environment so that we can test it better.
    # shareobjects no
    # shareobjectspoolsize 1024

5 . 运行redis

redis-server redis.conf

即可在后台启动redis服务，确认运行了之后，可以用redis-benchmark命令测试看看，还可以通过redis-cli命令实际操作一下，比如：  
./redis-cli set foo bar  
OK  
redis-cli get foo  
”bar“  
6. 关闭redis

./redis-cli shutdown
    
    如果端口变化可以指定端口:
    
    ./redis-cli -p 6380 shutdown

![20160211230636552][]

--------------------

配置第二个redis作用从redis与主redis保持数据同步

关键在于修改redis.conf这个主配置文件

1.port 6389 修改端口号
    
    2.将# slaveof <masterip> <masterport> 改为：slaveof 127.0.0.1 6379

然后继续采用上面的方法启动从redis即可  
![这里写图片描述][20160211232351168]

# 采用Redis客户端检验了一下,数据果然同步了 #

--------------------

**到这里配置redis就结束了**

> 如何完成tomcat8和redis的session同步机制呢？

1.添加下面这4个jar包

[点我下载][Link 2]

2.修改tomcat8的context.xml文件,  
第一个tomcat8内容如下

第2个tomcat8内容如下

3.重新分别启动tomcat即可

#关闭
    shutdown.sh
    #启动
    startup.sh

[20160212003455455]: /images/20220731/4a09f0cf129640bab66ebdcfb6c030d5.png
[20160211220820066]: /images/20220731/138151f0f0884b3e986b01ebc15926de.png
[nginx]: http://jingyan.baidu.com/article/6c67b1d69f59ab2787bb1e30.html
[Link 1]: http://blog.csdn.net/u013410747/article/details/50651113
[20160211230636552]: /images/20220731/88ffbe7c330a4951984e333f0cfa3acd.png
[20160211232351168]: /images/20220731/61fa435de78c4d08a6df4d366f4a1039.png
[Link 2]: http://download.csdn.net/detail/u013410747/9430000