NodeJS连接Redis：在（Raspberry Pi）树莓派上安装Redis并设置开机自动启动服务

简介

• 简单API：没有复杂的架构迁移，只是一个简单的API，可以用来实现强大的东西。

• 占地小：相比其它复杂性的实现，Redis的小巧迷死人了。每个浏览器厂商自主实施会非常简单。

• 能力强：在浏览器中存储层采用SQL有点矫枉过正。同样，文档存储也不错，但是95％的用例也不用着。 Redis的给你一个简单的键值存储，这足以覆盖所有人的需求。

Windows安装

Linux(Debian)安装

sudo apt-get install build-essential

sudo -s

mkdir /opt/redis
cd /opt/redis

wget http://download.redis.io/releases/redis-2.8.24.tar.gz
tar -xzf redis-2.8.24.tar.gz
cd redis-2.8.24
# 编译并安装
make install

cp /opt/redis/redis-2.8.24/src/redis-benchmark /opt/redis/
cp /opt/redis/redis-2.8.24/src/redis-cli /opt/redis/
cp /opt/redis/redis-2.8.24/src/redis-server /opt/redis/
cp /opt/redis/redis-2.8.24/src/redis-check-aof /opt/redis/
cp /opt/redis/redis-2.8.24/src/redis-check-dump /opt/redis/

adduser --system --no-create-home --disabled-login --disabled-password --group redis

touch /var/log/redis.log
chown redis:redis /var/log/redis.log
chmod u+w /var/log/redis.log

mkdir /etc/redis
touch /etc/redis/redis.conf
chown redis:redis -R /etc/redis/

nano /etc/redis/redis.conf

daemonize yes
pidfile /var/run/redis.pid
logfile /var/log/redis.log
port 6379
# bind 127.0.0.1
# unixsocket /tmp/redis.sock
timeout 300
loglevel verbose
databases 16
save 900 1
save 300 10
save 60 10000
rdbcompression yes
dbfilename dump.rdb
dir /var/redis/
# requirepass foobared

mkdir /var/redis
chown redis:redis /var/redis
chmod u+xw /var/redis

cd /etc/init.d/
nano redis

#! /bin/sh
### BEGIN INIT INFO
# Provides:   redis-server
# Required-Start: $syslog
# Required-Stop:  $syslog
# Should-Start:   $local_fs
# Should-Stop:    $local_fs
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:  redis-server - Persistent key-value db
# Description:    redis-server - Persistent key-value db
### END INIT INFO


PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/opt/redis/redis-server
DAEMON_ARGS=/etc/redis/redis.conf
NAME=redis-server
DESC=redis-server
PIDFILE=/var/run/redis.pid

test -x $DAEMON || exit 0
test -x $DAEMONBOOTSTRAP || exit 0

set -e

case "$1" in
  start)
  echo -n "Starting $DESC: "
  touch $PIDFILE
  chown redis:redis $PIDFILE
  if start-stop-daemon --start --quiet --umask 007 --pidfile $PIDFILE --chuid redis:redis --exec $DAEMON -- $DAEMON_ARGS
  then
    echo "$NAME."
  else
    echo "failed"
  fi
  ;;
  stop)
  echo -n "Stopping $DESC: "
  if start-stop-daemon --stop --retry 10 --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON
  then
    echo "$NAME."
  else
    echo "failed"
  fi
  rm -f $PIDFILE
  ;;

  restart|force-reload)
  ${0} stop
  ${0} start
  ;;
  *)
  echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload}" >&2
  exit 1
  ;;
esac

exit 0

chmod u+x redis
update-rc.d -f redis defaults

# 测试一下
./redis start

redis-cli -h <主机ip> -p <端口> -a <密码>

sudo update-rc.d -f redis remove　　#开机时不启动

在node.js中访问redis

npm install redis

var redis = require("redis")
  , client;

client = redis.createClient(6379, '127.0.0.1', {});

// 密码
client.auth('密码');

// 选择数据库，比如第3个数据库，默认是第0个
client.select(3, function() { /* ... */ });

client.on("error", function (err) {
    console.log("Error " + err);
});

// 设置键值
client.set("Testing", "string val", redis.print);

// 取值
client.get("Testing", function(err, replies) {
    
});

// 其它API
client.hset("hash key", "hashtest 1", "some value", redis.print);
client.hset(["hash key", "hashtest 2", "some other value"], redis.print);
client.hkeys("hash key", function (err, replies) {
     console.log(replies.length + " replies:");
     replies.forEach(function (reply, i) {
         console.log("    " + i + ": " + reply);
     });
     client.quit();
});


// 枚举趣出数据库中的所有键
client.keys('*', function (err, keys) {

});