redis主備部署方案-1126說課材料

1、r edi s 主 備 部 署 方 案 -20131126精品文檔redis主備自動(dòng)切換部署方案文檔修改記錄修改日期修改人修改說明版本號(hào)修改頁主實(shí)例 A: 0備實(shí)例 B： 32虛 IP : 10方案說明：redis部署方式采用主備的方式，通過keepalived來對外提供虛IP,備服務(wù)器實(shí)時(shí)同步主服務(wù)器的數(shù)據(jù)，當(dāng)主服務(wù)器掛掉時(shí)，能在5秒內(nèi)完成主備切換，實(shí)現(xiàn)融災(zāi)備份，并采用redis數(shù)據(jù)持久化，確保數(shù)據(jù)的安全。正常工作時(shí)，虛IP在主實(shí)例A上，備實(shí)例B自動(dòng)從A上同步數(shù)據(jù)，當(dāng)檢測 到主實(shí)例A掛掉之后（檢測機(jī)制為每3秒自動(dòng)檢測re

2、dis的所有端口是否能正常 連接，當(dāng)連續(xù)兩次檢測到其中任意端口無法連接時(shí)，將自動(dòng)停止keepalived程序，使虛IP進(jìn)行漂移），備實(shí)例B將自動(dòng)接管虛IP，待原主實(shí)例A恢復(fù)后，A 將自動(dòng)切換成備模式，從B上實(shí)時(shí)同步數(shù)據(jù)，主備角色互換，實(shí)現(xiàn)融災(zāi)備份。 安裝部署步驟如下：1. 安裝 keepalivedwget http:/www.keepalived.Org/software/keepalived-1.2.6.tar.gztar zxvf keepalived-1.2.6.tar.gzcd keepalived-1.2.6./con figure如果報(bào)錯(cuò)con figure: error:! O

3、pen SSL is not properly in stalled on your system. ! Can not in elude Open SSL headers files.解決辦法：yum -y install openssl-develyum -y install popt-develln -s /usr/src/kernels/2.6.32-220.el6.x86_64/ /usr/src/linux./configuremakemake installcp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/cp /

4、usr/local/etc/sysconfig/keepalived /etc/sysconfig/cp /usr/local/sbin/keepalived /usr/sbin/mkdir /etc/keepalived添加keepalived的配置項(xiàng)：vi /etc/keepalived/keepalived.conf global_defs router_id LVS_DEVEL vrrp_script Monitor_Redis script /home/bbcv/redis/redis_keepalive.sh interval 3 # 每3秒執(zhí)行一次weight 2# VIP1 v

5、rrp_instance VI_1 interfaceeth0主備服務(wù)器都設(shè)置成 BACKUPvirtual_router_id priority 100 advert_int 1#nopreempt #110#備份服務(wù)上將100改為90檢查間隔設(shè)置為不搶占，注意這個(gè)配置只能設(shè)置在state為BACKU啲主機(jī)上，而且這個(gè)主機(jī)的priority必須比另外一臺(tái)高authentication auth_type PASS auth_pass 1111notify_master/home/bbcv/redis/redis_master.shnotify_backup/home/bbcv/redis/r

6、edis_backup.shtrack_script Monitor_Redis #（調(diào)用redis進(jìn)程檢測腳本） virtual_ipaddress state BACKUP #10#(如果有多個(gè)VIP，繼續(xù)換行填寫.)啟動(dòng) keepalivedservice keepalived start2. redis_keepalive.sh 腳本進(jìn)程,該腳本主要實(shí)現(xiàn)對redis進(jìn)程進(jìn)行監(jiān)控，當(dāng)檢測到 redis進(jìn)程掛掉時(shí)，自動(dòng)停止keepalived使虛IP進(jìn)行漂移注意添加該腳本的可執(zhí)行權(quán)限！chmod +x redis_keepalive.sh#!/bin/bashtim

7、e=$(date +%Y-%m-%d %H:%M:%S)#redis部署路徑redispath= /home/bbcv/redis#redis-cli部署路徑rediscli= /usr/local/bin/redis-cliif ! -d $redispath/logs ; thenmkdir $redispath/logsfilogfile=$redispath/logs/redis-state.logoldfile=$logfile.$(date +%Y-%m-%d -date=30 days ago)yesterdayfile=$logfile.$(date +%Y-%m-%d -da

8、te=1 days ago)#把昨天的日志重命名if -f $yesterdayfile thenecho OKelsemv $logfile $yesterdayfile $logfile 2&1echo $time $yesterdayfile Move yesterdayfile Success! $logfilefi#刪除老的日志文件if -f $oldfile thenrm -f $oldfile $logfile 2&1echo $time $oldfile Delete Old File Success! $logfileelseecho no old filefi#檢測redi

9、s端口是否正常for line in cat $redispath/config.inidoport=echo $line|awk -F | print $1、passwd=echo $line|awk -F | print $2、$rediscli -h -p $port -a $passwd info /dev/nullif $? -eq 0 ; thenstatus=$rediscli -h -p $port -a $passwd info|grep role|awk -F :print $2、echo $time redis 端口 $port 正

10、常，目前狀態(tài)為:$status $logfileelseecho $time ERROR redis 端口 $port 異常$logfilesleep 2# try to found it again$rediscli -h -p $port -a $passwd info /dev/nullif $? -eq 0 ; thenstatus=$rediscli -h -p $port -a $passwd info|grep role|awk -F :print $2、echo $time redis 端口 $port 正常，目前狀態(tài)為:$status

11、$logfile#exit 0elseecho $time ERROR redis端口 $port 異常，開始停 keepalived $logfile#stop keepalived/etc/init.d/keepalived stopecho $time stop keepalived $logfilefifidone3. redis_master.sh 腳本該腳本主要實(shí)現(xiàn)當(dāng)keepalived 切換到 master時(shí)，執(zhí)行slaveof no one 語句把redis 的端口轉(zhuǎn)換為主模式注意添加該腳本的可執(zhí)行權(quán)限！chmod +x redis_master.sh#!/bin/sh#本機(jī)I

12、P地址localip=#另一臺(tái)服務(wù)器的地址backip= 32time=$(date +%Y-%m-%d %H:%M:%S)#redis部署路徑redispath= /home/bbcv/redis#redis-cli 部署路徑rediscli= /usr/local/bin/redis-cli#日志文件目錄logfile=$redispath/logs/redis-state.logfor line in cat $redispath/config.inidoport=echo $line|awk -F | print $1、passwd=echo

13、$line|awk -F | print $2、echo $time redis 端口 $port 切換成主端口 $logfile$rediscli -h $localip -p $port -a $passwd slaveof no one $logfile 2&1sleep 1done4. redis_backup.sh該腳本主要實(shí)現(xiàn)當(dāng) keepalived 切換到master時(shí)，執(zhí)行slaveof 主redisIP 端口 語句，把redis的端口轉(zhuǎn)換為備模式，并同步主 redis的數(shù)據(jù)注意添加該腳本的可執(zhí)行權(quán)限！chmod +x redis_backup.sh#!/bin/sh#本機(jī)IP

14、地址localip=#另一臺(tái)服務(wù)器的地址backip= 32time=$(date +%Y-%m-%d %H:%M:%S)#redis部署路徑redispath= /home/bbcv/redis#redis-cli部署路徑rediscli= /usr/local/bin/redis-cli#日志文件目錄logfile=$redispath/logs/redis-state.log#檢測主redis服務(wù)是否啟動(dòng)port=cat $redispath/config.ini |sed -n 1p| awk -F | print $1、passwd=cat

15、$redispath/config.ini |sed -n 1p| awk -F | print $2、$rediscli -h $backip -p $port -a $passwd info /dev/nullif $? -eq 0 ; thenecho $time主 redis 服務(wù) $backip正常在用$logfileecho $time 30秒后將從主 redis 服務(wù) $backip同步數(shù)據(jù)$logfilesleep 30time=$(date +%Y-%m-%d %H:%M:%S)echo $time開始從 redis 主服務(wù) $backip同步數(shù)據(jù)$logfilefor li

16、ne in cat $redispath/config.inidoport=echo $line|awk -F | print $1、passwd=echo $line|awk -F | print $2、time=$(date +%Y-%m-%d %H:%M:%S)echo $time redis $port端口切換成 $backip 的備端口 $logfile$rediscli -h $localip -p $port -a $passwd slaveof $backip $port $logfile2&1sleep 1doneelseecho $time啟用本機(jī)為主 redis! $lo

17、gfilefi5. con fig.i ni該配置文件為每個(gè)redis端口對應(yīng)的密碼14948|kuanyun00111172|kuanyun00112172|kuanyun00113172|kuanyun00116172|kuanyun00118000|kuanyun00118001|kuanyun00121172|kuanyun00122172|kuanyun00123172|kuanyun0016. 安裝 redis1.新建文件夾，如mkdir redis2. 將 redis-2.2.13.tar.gz拷入其中3. 解壓并進(jìn)入主目錄4. make5. make in stall（ Ubu

18、 ntu 上需要 sudo 執(zhí)行）6. 修改配置文件 redis.conf修改如下：daemonize no 改為 daemonize yes取消注釋：syslog-enabled no（改為 syslog-enabled yes）syslog-facility local0修改port:port 14948 （改為具體的redis 端口 ）設(shè)置redis端口密碼：requirepass mypasswd （取消注釋，并改為想要設(shè)置的密碼 ）設(shè)置master的密碼:收集于網(wǎng)絡(luò)，如有侵權(quán)請聯(lián)系管理員刪除masterauth master-password（該配置為主 redis 設(shè)置的密碼）修改

19、dump文件名稱：dbfile name aim_dump.rdb（修改成具體模塊的 dump名稱）已將修改后的aim.redis.conf文件放到redis部署目錄下，不同需求還需再修改配置文件（如 修改端口、增加密碼、修改dump文件名稱 等），可參考如下aim.redis.conf件aim.redis.conf啟動(dòng)時(shí)，可能會(huì)報(bào)如下錯(cuò)誤:No such file or directory7. 在執(zhí)行 redis-server redis.confCant chdir to7var/db/redis需要手動(dòng)創(chuàng)建/var/db/redis 文件夾# WARNING overcommit_mem

20、ory is set to 0! Backgrou nd save may fail un der low memory con diti on需要執(zhí)行sysctl vm.overcommit_memory=1 修改內(nèi)核參數(shù)8. 再次執(zhí)行 redis-server redis.conf可成功啟動(dòng) redis7. redis啟停腳本啟動(dòng)腳本：start.sh#!/bin/shredis-server urm.redis.confredis-server cscs.redis.confredis-server cums.redis.confredis-server aim.redis.confre

21、dis-server bgw.redis.confredis-server ggw.redis.confredis-server mgw.redis.confredis-server vgw.redis.confredis-server ordergw.redis.confredis-server keygw.redis.confPID=、ps -ef |grep keepalived|grep -v grep|awk print $2、if ! -z $PID ; thenecho keepalived is alivedelseecho start keepalived ./etc/ini

22、t.d/keepalived startfi停止腳本：stop.sh#!/bin/shpidlist=ps -ef |egrep redis|sed /.*grep/d|awk print $2、for pid in $pidlist; doecho kill pid $pid startkill -9 $pidecho kill pid $pid enddone8. 測試1. 查看當(dāng)前redis是主還是備/usr/local/bin/redis-cli -h -p 6379 infoIro (e：5 lavenasrer_ho5T92*168.232master_port:6379ntaster_l 1 rk_st at us : upmaster_l ast_i o_seconds_ago: 1dbO:kcys-71 e