redis服务搭建
主机命名
- 确定操作系统类型
cat /etc/issue 查看当前系统的主机名
hostname改/etc/sysconfig下的network文件
vi /etc/sysconfig/network把HOSTNAME后面的值改为想要设置的主机名
NETWORKING=yes HOSTNAME=CentOS2
system network reset
exit 验证
不得重启
更改/etc下的hosts文件
vi /etc/hosts
然后将localhost.localdomain改为想要设置的主机名。127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.29.136 CentOS1 192.168.29.135 CentOS2 192.168.29.134 CentOS3
reboot- 检查
hostname
时钟同步
CentOS6
检查是否启动时钟同步服务
service检查:service ntpd status
job 检查 :crontab -l
修改定时任务:crontab -e设置时钟同步:
- 修改 /etc/ntp.conf 加入 ntp server ip
vi /etc/ntp.confserver 10.200.92.18 - 启动ntp服务:
service ntpd start - 设置服务自动启动:
- 设置
chkconfig ntpd on - 检查
chkconfig -list ntpd
- 设置
- 修改 /etc/ntp.conf 加入 ntp server ip
CentOS7
- 使用rpm检查ntp包是否安装
[root@CentOS3 home]# rpm -q ntp
ntp-4.2.6p5-22.el7.centos.x86_64 - 如果已经安装则略过此步，否则使用yum进行安装，并设置系统开机自动启动并启动服务yum -y install ntpsystemctl enable ntpdsystemctl start ntpd
修改完成后重启ntpd服务systemctl restart ntpd
使用ntpq -p 查看网络中的NTP服务器，同时显示客户端和每个服务器的关系
使用ntpstat 命令查看时间同步状态，这个一般需要5-10分钟后才能成功连接和同步。所以，服务器启动后需要稍等下：
刚启动的时候，一般是：
unsynchronised
time server re-starting
polling server every 8 s
操作系统
CentOS release 6.8 (Final)
CentOS 7
网络
CentOS 6.8:
- 防火墙:
- 即使生效,重启后失效
开启: service iptables start
关闭: service iptables stop
- 重启后生效
开启: chkconfig iptables on
关闭: chkconfig iptables off
- 开启了防火墙时,做如下设置可以仅开启相关端口:
修改/etc/sysconfig/iptables 文件,添加以下内容:
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
CentOS 7.0:
CentOS 7.0默认使用的是firewall作为防火墙，这里改为iptables防火墙。
firewall：
systemctl start firewalld.service#启动firewall
systemctl stop firewalld.service#停止firewall
systemctl disable firewalld.service#禁止firewall开机启动
源码安装redis
wget http://download.redis.io/releases/redis-3.2.4.tar.gz
tar xzf redis-3.2.4.tar.gz
cd redis-3.2.4
make
make test //只用单核运行 make test：taskset -c 1 sudo make test
make install
mv redis-3.2.4 redis
mv redis /usr/local/
修复3个redis-server 启动警告
echo 1 > /proc/sys/vm/overcommit_memory
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo 511 > /proc/sys/net/core/somaxconn
开机启动redis
/usr/local/redis/utils/install_server.sh
第一个参数分别选择7380 7381 26379
26379
Please select the redis executable path [/usr/local/bin/redis-server]
+ /usr/local/bin/redis-sentinel
关闭实例
[root@CentOS3 redis]# ps aux|grep redis
root 19874 0.0 0.0 136912 7528 ? Ssl 15:43 0:00 /usr/local/bin/redis-server 127.0.0.1:7380
root 20178 0.0 0.0 136912 7528 ? Ssl 15:43 0:00 /usr/local/bin/redis-server 127.0.0.1:7381
root 20541 0.0 0.0 136912 7528 ? Ssl 15:47 0:00 /usr/local/bin/redis-server 127.0.0.1:26379
root 20705 0.0 0.0 112644 992 pts/2 S+ 15:48 0:00 grep --color=auto redis
[root@CentOS3 redis]# redis-cli -p 7380 shutdown
[root@CentOS3 redis]# redis-cli -p 7381 shutdown
[root@CentOS3 redis]# redis-cli -p 26379 shutdown
[root@CentOS3 redis]# ps aux|grep redis
root 20721 0.0 0.0 112644 996 pts/2 S+ 15:49 0:00 grep --color=auto redis
redis-cli -p 7380 shutdown && redis-cli -p 7381 shutdown && redis-cli -p 26379 shutdown
修改sentinel启动脚本
vim /etc/init.d/redis_26379
+ REDISHOSTNAME="192.168.29.134"
- $CLIEXEC -p $REDISPORT shutdown
+ $CLIEXEC -h $REDISHOSTNAME -p $REDISPORT shutdown
resid-service config (135:7380)
- bind 127.0.0.1
+ bind 192.168.29.135
- protected-mode yes
+ protected-mode no
- # unixsocket /tmp/redis.sock
- # unixsocketperm 700
+ unixsocket /tmp/redis.sock
+ unixsocketperm 700
- timeout 0
+ timeout 300
- tcp-keepalive 300
+ tcp-keepalive 0
- save 900 1
- save 300 10
- save 60 10000
+ #save 900 1
+ #save 300 10
+ #save 60 10000
- stop-writes-on-bgsave-error yes
+ stop-writes-on-bgsave-error no
- #repl-ping-slave-period 10
+ repl-ping-slave-period 10
- # repl-backlog-size 1mb
+ repl-backlog-size 5mb
- # repl-backlog-ttl 3600
+ repl-backlog-ttl 600
- #maxclients 10000
+ maxclients 10000
- # maxmemory <bytes>
+ maxmemory 2gb
- appendonly no
+ appendonly yes
resid-service config (135:7381)
cp /etc/redis/7380.conf /etc/redis/7381.conf
vim /etc/redis/7381.conf
`:%s/7380/7381/g` //替换所有的7380为7381
redis-sentinal config (135:26379)
rm -f /etc/redis/26379.conf
cp /usr/local/redis/sentinel.conf /etc/redis/26379.conf
vim /usr/local/redis/26379.conf
+ daemonize yes
- #protected-mode no
+ protected-mode no
- dir /tmp
+ dir /var/lib/redis/26379
+ logfile /var/log/redis_26379.log
- sentinel monitor mymaster 127.0.0.1 6379 2
+ sentinel monitor redis136 192.168.29.136 7380 2
- sentinel down-after-milliseconds mymaster 30000
+ sentinel down-after-milliseconds redis136 5000
- sentinel parallel-syncs mymaster 1
+ sentinel parallel-syncs redis136 1
- sentinel failover-timeout mymaster 180000
+ sentinel failover-timeout redis136 60000
+ sentinel monitor redis135 192.168.29.135 7380 2
+ sentinel down-after-milliseconds redis135 5000
+ sentinel failover-timeout redis135 60000
+ sentinel parallel-syncs redis135 1
+ sentinel monitor redis134 192.168.29.134 7380 2
+ sentinel down-after-milliseconds redis134 5000
+ sentinel failover-timeout redis134 60000
+ sentinel parallel-syncs redis134 1
redis部署
预定分配方案:
192.168.29.134
+---------+
| M1 7380 |
| R3 7381 |
| S1 |
+---------+
192.168.29.136 | 192.168.29.135
+---------+ | +---------+
| M3 7380 | | | M2 7380 |
| R2 7381 |-----------| R1 7381 |
| S3 | | S2 |
+---------+ +---------+
Configuration: quorum = 2
redis-server实例启动:
redis-server /etc/redis/7380.conf
redis-server /etc/redis/7381.conf
netstat -lntpa |grep redis
主从分配
三台主机实例均启动之后,进行主从配置:
redis-cli -h 192.168.29.134 -p 7381 slaveof 192.168.29.136 7380
redis-cli -h 192.168.29.135 -p 7381 slaveof 192.168.29.134 7380
redis-cli -h 192.168.29.136 -p 7381 slaveof 192.168.29.135 7380
redis-sentinel实例启动:
最后在三台主机上启动sentinel
redis-sentinel /etc/redis/26379.conf
检查failover
redis-cli -h 192.168.29.135 -p 7380 debug sleep 300s
redis-cli -p 26379 sentinel master redis135