CentOS6.4 install Openresty and Redis and easily read Redis data using LUA in Nginx

1. download Openresty and Redis

Openresty:wget http://openresty.org/download/ngx_openresty-1.4.3.6.tar.gz

Redis:wget http://download.redis.io/releases/redis-2.8.6.tar.gz

2. Install dependent packages

Yum install-y gcc gcc-c++ readline-devel pcre-devel openssl-devel tcl Perl

3, installation openresty

Install Luajit First

wget http://luajit.org/download/LuaJIT-2.0.2.tar.gztar zxvf luajit-2.0.2.tar.gzmakemake installexport luajit_lib=/ Usr/local/libexport luajit_inc=/usr/local/include/luajit-2.0

Installing Openresty

Tar zxvf ngx_openresty-1.4.3.6.tar.gzcd ngx_openresty-1.4.3.6./configure--with-luajitmakemake Install

the relevant modules such as LUA and Redis are already installed and can be viewed using the commands below .

/usr/local/openresty/nginx/sbin/nginx-v

set Nginx as service and boot up

Vi/etc/rc.d/init.d/nginx

#!/bin/bash# tengine Startup script# processname:nginx# chkconfig:-15# Description:nginx is a world Wide Web server . It is used to serve# pidfile:/var/run/nginx.pid# config:/usr/local/nginx/conf/nginx.confnginxd=/usr/local/openresty/ nginx/sbin/nginxnginx_config=/usr/local/openresty/nginx/conf/nginx.confnginx_pid=/usr/local/openresty/nginx/ Logs/nginx.pidretval=0prog= "Nginx" # Source function library. /etc/rc.d/init.d/functions# Source Networking configuration: /etc/sysconfig/network# Check that networking are up. [${networking} = "No"] && exit 0[-x $nginxd] | | Exit 0# Start Nginx daemons Functions.start () {If [-e $nginx _pid];thenecho "Tengine already running ...." Exit 1fiecho-n $ "Starting $prog:" Daemon $nginxd-c ${nginx_config}retval=$?echo[$RETVAL = 0] && touch/var/lock/subsys/nginxre Turn $RETVAL}# Stop nginx daemons functions.stop () {echo-n $ "stopping $prog:" Killproc $nginxdRETVAL =$?echo[$RETVAL = 0 ] && rm-f/var/lock/subsys/nginx/usr/lOcal/nginx/logs/nginx.pid}reload () {echo-n $ "reloading $prog:" #kill-hup ' cat ${nginx_pid} ' Killproc $nginxd-hupretval =$?echo}# See how we were Called.case "$" instart) start; stop) stop;; reload) reload;; restart) Stopstart;; Status) status $progRETVAL =$?;; *) echo $ "Usage: $prog {start|stop|restart|reload|status|help}" exit 1esacexit $RETVAL

Save Exit

chmod 775/etc/rc.d/init.d/nginx   #赋予文件执行权限chkconfig  --level 012345 nginx on   #设置开机启动service nginx start

4. Installing Redis

Tar zxvf redis-2.8.6.tar.gz
MV redis-2.8.6 Redis
CD Redis
Make MALLOC=LIBC
Make install

Set up a Redis configuration file

Vi/usr/local/redis/redis.conf

#是否作为守护进程运行daemonize yes# is run as a subsequent process, you need to specify a PID, which defaults to/var/run/redis.pidpidfile redis.pid# bound host IP, and the default value is 127.0.0.1#bind 127.0.0.1#redis Default listening port 6379# client idle for how many seconds, disconnect, default is 300 (seconds) Timeout 300# logging level, there are 4 optional values, Debug,verbose (default), notice, Warningloglevel verbose# Specifies the file name of the log output, the default value is stdout, can also be set to/dev/null masking log logfile stdout# the number of available databases, the default is 16, the default database is 0databases 16# Policy to save data to disk # When a keys data is changed, 900 seconds to disk save 900 # When 10 keys data is changed, 300 seconds to disk save 300 10# when there are 1w keys data is changed, 60 seconds Refresh to disk once save 60 10000# when dump. RDB database is compressed data object rdbcompression yes# Local database file name, default value is Dump.rdbdbfilename dump.rdb# The local database holds the path, the default value is./dir.

Adjust the memory allocation policy

Take a look at the memory allocation policy Vi/proc/sys/vm/overcommit_memory note with VI or VIM can not modify the value inside, you need to use the following method echo "1" >>/proc/sys/vm/overcommit_ Memory

This file specifies the kernel's policy for memory allocation, which can be 0, 1, 2.
0, indicates that the kernel will check for sufficient available memory to be used by the process, and if sufficient memory is available, the memory request is allowed; otherwise, the memory request fails and the error is returned to the application process.
1, which means that the kernel allows all physical memory to be allocated regardless of the current memory state.
2, which indicates that the kernel allows allocating memory that exceeds the sum of all physical memory and swap space.
Redis in the dump data, will fork out a sub-process, in theory the child process occupies the same memory and the parent is the same, such as the parent occupies 8G of memory, this time also to allocate 8G of memory to child, if the memory is not affordable, Will often cause the Redis server down or IO load is too high, inefficient. So the more optimized memory allocation policy here should be set to 1 (indicating that the kernel allows all physical memory to be allocated regardless of the current memory state)

Start the service

Redis-server/usr/local/redis/redis.conf

Use the REDIS-CLI command to actually do it.

Close Service

REDIS-CLI shutdown If port change can specify port redis-cli-p 6380 shutdown

Save/backup
Data backups can be implemented by backing up the file on a regular basis.
Because Redis is written to disk asynchronously, if you want to have the in-memory data written to the hard disk immediately, you can execute the following command:
Redis-cli Save or Redis-cli-p 6380 Save (Specify port)
Note that the above deployment requires certain permissions, such as copying and setting kernel parameters.
Memory data is also written to the hard disk when the Redis-benchmark command is executed.

Set up Redis boot

Vi/etc/rc.d/init.d/redis

#!/bin/bash## redis-this script starts and stops the Redis-server daemon## chkconfig:-12# Description:redis is A persistent key-value database# processname:redis-server# config:/etc/redis/redis.conf# pidfile:/var/run/redi S.pidsource/etc/init.d/functionsbin= "/usr/local/bin" config= "/usr/local/redis/redis.conf" PIDFILE= "/var/run/ Redis.pid "# # Read configuration[-R" $SYSCONFIG "] && source" $SYSCONFIG "retval=0prog=" Redis-server "desc="        Redis Server "Start () {if [-e $PIDFILE];then echo" $desc already running ... "Exit 1        Fi echo-n $ "Starting $desc:" Daemon $BIN/$prog $CONFIG retval=$?  echo [$RETVAL-eq 0] && touch/var/lock/subsys/$prog return $RETVAL}stop () {echo-n $ "stop        $desc: "Killproc $prog retval=$?"    echo [$RETVAL-eq 0] && rm-f/var/lock/subsys/$prog $PIDFILE return $RETVAL}restart () {Stop Start}case ""in Start" start;  stop) stop;;  restart) restart;;        Condrestart) [-e/var/lock/subsys/$prog] && restart retval=$?  ;;        Status) status $prog retval=$?   ;; *) echo $ "Usage: $ start|stop|restart|condrestart|status}" Retval=1esacexit $RETVAL

Save exit

chmod 777/etc/rc.d/init.d/redischkconfig redis onservice redis start    #stop, restart

5. Invoke Lua script in Nginx to simply read data from Redis

Vi/usr/local/openresty/nginx/conf/nginx.conf

In the Server configuration section, add

location/test {            default_type text/plain;            Content_by_lua_file/usr/local/test.lua;        }

Save exit, and then create a LUA script file

Vi/usr/local/test.lua

Local Redis = require "Resty.redis" local cache = Redis.new () cache.connect (cache, ' 127.0.0.1 ', ' 6379 ') Local res = Cache:get ("foo") if Res==ngx.null then    Ngx.say ("This is null")    Returnendngx.say (RES)

Save exit, restart Nginx

Service Nginx Restart

6. Testing

Modify the index.html file in the Nginx HTML directory to test, add jquery references and AJAX requests

<script type= "Text/javascript"  src= "jquery-1.8.3.min.js" ></script><script type= "text/ JavaScript >$ (function () {                        $.ajax ({                    type: "GET",                                        URL: "Http://192.168.0.106/test",                    success: function (data) {                        alert (data);                    }                );            }); </script>

Access Nginx address http://192.168.0.106/, if the key value is foo No data will pop up

Adding data to Redis with the REDIS-CLI command

REDIS-CLI set Foo test

The re-access address will pop up

Category: Linux

CentOS6.4 install Openresty and Redis and easily read Redis data using LUA in Nginx