redis启动命令 linux

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第一步：安装Redis

前面已经安装过了 不解释，

Reids安装包里有个集群工具，要复制到/usr/local/bin里去

cp redis-329/src/redis-tribrb /usr/local/bin

第二步：修改配置，创建节点

我们现在要搞六个节点，三主三从，

端口规定分别是7001，7002，7003，7004，7005，7006

我们先在root目录下新建一个redis_cluster目录，然后该目录下再创建6个目录，

分别是7001，7002，7003，7004，7005，7006，用来存在redis配置文件；

这里我们要使用redis集群，要先修改redis的配置文件redisconf

mkdir redis_cluster 新建目录

[root@localhost ~]# cd redis_cluster/

[root@localhost redis_cluster]# mkdir 7001 7002 7003 7004 7005 7006

[root@localhost redis_cluster]# ll

总用量 0

drwxr-xr-x 2 root root 6 7月 27 17:18 7001

drwxr-xr-x 2 root root 6 7月 27 17:18 7002

drwxr-xr-x 2 root root 6 7月 27 17:18 7003

drwxr-xr-x 2 root root 6 7月 27 17:18 7004

drwxr-xr-x 2 root root 6 7月 27 17:18 7005

drwxr-xr-x 2 root root 6 7月 27 17:18 7006

[root@localhost redis_cluster]#

先复制一份配置文件到7001目录下

[root@localhost redis_cluster]# cd

[root@localhost ~]# cp redis-329/redisconf redis_cluster/7001/

我们修改下这个配置文件

vi redis_cluster/7001/redisconf

修改一下几个

port 7001 //六个节点配置文件分别是7001-7006

daemonize yes //redis后台运行

pidfile /var/run/redis_7001pid //pidfile文件对应7001-7006

cluster-enabled yes //开启集群

cluster-config-file nodes_7001conf //保存节点配置，自动创建，自动更新对应7001-7006

cluster-node-timeout 5000 //集群超时时间，节点超过这个时间没反应就断定是宕机

appendonly yes //存储方式，aof，将写 *** 作记录保存到日志中

7001下的修改完后，我们把7001下的配置分别复制到7002-7006 然后对应的再修改下配置即可；

[root@localhost ~]# cp redis_cluster/7001/redisconf redis_cluster/7002/

[root@localhost ~]# cp redis_cluster/7001/redisconf redis_cluster/7003/

[root@localhost ~]# cp redis_cluster/7001/redisconf redis_cluster/7004/

[root@localhost ~]# cp redis_cluster/7001/redisconf redis_cluster/7005/

[root@localhost ~]# cp redis_cluster/7001/redisconf redis_cluster/7006/

[root@localhost ~]# vi redis_cluster/7002/redisconf

[root@localhost ~]# vi redis_cluster/7003/redisconf

[root@localhost ~]# vi redis_cluster/7004/redisconf

[root@localhost ~]# vi redis_cluster/7005/redisconf

[root@localhost ~]# vi redis_cluster/7006/redisconf

编辑后面5个配置文件，把 port ，pidfile，cluster-config-file 分别修改下即可；

第三步：启动六个节点的redis

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7001/redisconf

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7002/redisconf

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7003/redisconf

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7004/redisconf

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7005/redisconf

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7006/redisconf

启动六个节点

[root@localhost ~]# ps -ef | grep redis

查找下redis进程

root 9501 1 0 17:38 00:00:00 /usr/local/redis/bin/redis-server 127001:7001 [cluster]

root 9512 1 0 17:45 00:00:00 /usr/local/redis/bin/redis-server 127001:7002 [cluster]

root 9516 1 0 17:45 00:00:00 /usr/local/redis/bin/redis-server 127001:7003 [cluster]

root 9520 1 0 17:45 00:00:00 /usr/local/redis/bin/redis-server 127001:7004 [cluster]

root 9524 1 0 17:45 00:00:00 /usr/local/redis/bin/redis-server 127001:7005 [cluster]

root 9528 1 0 17:45 00:00:00 /usr/local/redis/bin/redis-server 127001:7006 [cluster]

说明都启动成功了

第四步：创建集群

redis官方提供了redis-tribrb工具，第一步里已经房到里bin下 ；

但是在使用之前 需要安装ruby，以及redis和ruby连接

yum -y install ruby ruby-devel rubygems rpm-build

gem install redis

redis-tribrb create --replicas 1 127001:7001 127001:7002 127001:7003 127001:7004 127001:7005 127001:7006

创建集群

[root@localhost ~]# redis-tribrb create --replicas 1 127001:7001 127001:7002 127001:7003 127001:7004 127001:7005 127001:7006

>>> Creating cluster

>>> Performing hash slots allocation on 6 nodes

Using 3 masters:

127001:7001

127001:7002

127001:7003

Adding replica 127001:7004 to 127001:7001

Adding replica 127001:7005 to 127001:7002

Adding replica 127001:7006 to 127001:7003

M: bfcfcdc304b011023fa568e044ea23ea6bc03c3c 127001:7001

slots:0-5460 (5461 slots) master

M: d61e66e49e669b99d801f22f6461172696fdd1c9 127001:7002

slots:5461-10922 (5462 slots) master

M: aa6bc3f1e1174c3a991c01882584707c2408ec18 127001:7003

slots:10923-16383 (5461 slots) master

S: 7908a60306333c5d7c7c5e7ffef44bdf947ef0a4 127001:7004

replicates bfcfcdc304b011023fa568e044ea23ea6bc03c3c

S: 1d2341fd3b79ef0fccb8e3a052bba141337c6cdd 127001:7005

replicates d61e66e49e669b99d801f22f6461172696fdd1c9

S: f25b35f208dc96605ee4660994d2ac52f39ac870 127001:7006

replicates aa6bc3f1e1174c3a991c01882584707c2408ec18

Can I set the above configuration (type 'yes' to accept):

从运行结果看 主节点就是7001 7002 7003 从节点分别是7004 7005 7006

7001分配到的哈希槽是 0-5460

7002分配到的哈希槽是 5461-10922

7003分配到的哈希槽是 10923-16383

最后问我们是否接受上面的设置，输入yes 就表示接受，我们输入yes

然后显示：

>>> Nodes configuration updated

>>> Assign a different config epoch to each node

>>> Sending CLUSTER MEET messages to join the cluster

Waiting for the cluster to join

>>> Performing Cluster Check (using node 127001:7001)

M: bfcfcdc304b011023fa568e044ea23ea6bc03c3c 127001:7001

slots:0-5460 (5461 slots) master

1 additional replica(s)

S: f25b35f208dc96605ee4660994d2ac52f39ac870 127001:7006

slots: (0 slots) slave

replicates aa6bc3f1e1174c3a991c01882584707c2408ec18

M: d61e66e49e669b99d801f22f6461172696fdd1c9 127001:7002

slots:5461-10922 (5462 slots) master

1 additional replica(s)

S: 1d2341fd3b79ef0fccb8e3a052bba141337c6cdd 127001:7005

slots: (0 slots) slave

replicates d61e66e49e669b99d801f22f6461172696fdd1c9

M: aa6bc3f1e1174c3a991c01882584707c2408ec18 127001:7003

slots:10923-16383 (5461 slots) master

1 additional replica(s)

S: 7908a60306333c5d7c7c5e7ffef44bdf947ef0a4 127001:7004

slots: (0 slots) slave

replicates bfcfcdc304b011023fa568e044ea23ea6bc03c3c

[OK] All nodes agree about slots configuration

>>> Check for open slots

>>> Check slots coverage

[OK] All 16384 slots covered

显示配置哈希槽，以及集群创建成功，可以用了；

第五步：集群数据测试

我们先连接任意一个节点，然后添加一个key：

redis-cli是redis默认的客户端工具，启动时加上｀-c｀参数，`-p`指定端口，就可以连接到集群。

连接任意一个节点端口：

[root@localhost ~]# /usr/local/redis/bin/redis-cli -c -p 7002

127001:7002>

我们连接7002

127001:7002> set xxx 'fdafda'

-> Redirected to slot [4038] located at 127001:7001

OK

前面说过Redis Cluster值分配规则，所以分配key的时候，它会使用CRC16(‘my_name’)%16384算法，来计算，将这个key 放到哪个节点，这里分配到了4038slot 就分配到了7001(0-5460)这个节点上。所以有：

Redirected to slot [4038] located at 127001:7001

我们从其他集群节点 ，都可以获取到数据

127001:7001> exit

[root@localhost ~]# /usr/local/redis/bin/redis-cli -c -p 7005

127001:7005> get xxx

-> Redirected to slot [4038] located at 127001:7001

"fdafda"

127001:7001>

第六步：集群宕机测试

假如我们干掉一个节点，比如7002 这个主节点

[root@localhost ~]# ps -ef | grep redis

root 9501 1 0 17:38 00:00:02 /usr/local/redis/bin/redis-server 127001:7001 [cluster]

root 9512 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7002 [cluster]

root 9516 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7003 [cluster]

root 9520 1 0 17:45 00:00:02 /usr/local/redis/bin/redis-server 127001:7004 [cluster]

root 9524 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7005 [cluster]

root 9528 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7006 [cluster]

root 9601 2186 0 18:12 pts/0 00:00:00 grep --color=auto redis

[root@localhost ~]# kill -9 9512

[root@localhost ~]# ps -ef | grep redis

root 9501 1 0 17:38 00:00:02 /usr/local/redis/bin/redis-server 127001:7001 [cluster]

root 9516 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7003 [cluster]

root 9520 1 0 17:45 00:00:02 /usr/local/redis/bin/redis-server 127001:7004 [cluster]

root 9524 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7005 [cluster]

root 9528 1 0 17:45 00:00:01 /usr/local/redis/bin/redis-server 127001:7006 [cluster]

root 9603 2186 0 18:12 pts/0 00:00:00 grep --color=auto redis

[root@localhost ~]#

然后再来看下集群的情况

redis-tribrb check 127001:7001

>>> Performing Cluster Check (using node 127001:7001)

M: bfcfcdc304b011023fa568e044ea23ea6bc03c3c 127001:7001

slots:0-5460 (5461 slots) master

1 additional replica(s)

S: f25b35f208dc96605ee4660994d2ac52f39ac870 127001:7006

slots: (0 slots) slave

replicates aa6bc3f1e1174c3a991c01882584707c2408ec18

M: 1d2341fd3b79ef0fccb8e3a052bba141337c6cdd 127001:7005

slots:5461-10922 (5462 slots) master

0 additional replica(s)

M: aa6bc3f1e1174c3a991c01882584707c2408ec18 127001:7003

slots:10923-16383 (5461 slots) master

1 additional replica(s)

S: 7908a60306333c5d7c7c5e7ffef44bdf947ef0a4 127001:7004

slots: (0 slots) slave

replicates bfcfcdc304b011023fa568e044ea23ea6bc03c3c

[OK] All nodes agree about slots configuration

>>> Check for open slots

>>> Check slots coverage

[OK] All 16384 slots covered

我们发现 7005本来是从节点，由于他对应的主节点挂了，就自动变成主节点master，所有会有最后一个说明

All 16384 slots covered 所有哈希槽都可覆盖了； 集群可以正常使用；

假如我们把7005也干掉，试试看

[root@localhost ~]# kill -9 9524

[root@localhost ~]# ps -ef | grep redis

root 9501 1 0 17:38 00:00:03 /usr/local/redis/bin/redis-server 127001:7001 [cluster]

root 9516 1 0 17:45 00:00:02 /usr/local/redis/bin/redis-server 127001:7003 [cluster]

root 9520 1 0 17:45 00:00:03 /usr/local/redis/bin/redis-server 127001:7004 [cluster]

root 9528 1 0 17:45 00:00:02 /usr/local/redis/bin/redis-server 127001:7006 [cluster]

root 9610 2186 0 18:16 pts/0 00:00:00 grep --color=auto redis

[root@localhost ~]#

查看下集群情况

redis-tribrb check 127001:7001

这里我们发现 出事了，因为主从节点都挂了 所以有一部分哈希槽没得分配，最后一句

[ERR] Not all 16384 slots are covered by nodes 没有安全覆盖；

所以不能正常使用集群；

环境：centos79

版本：redis-626

查看gcc版本

没有安装的话,安装命令如下

安装包版本redis-626

将安装包上传到/opt/software目录下

从redis的源码目录中复制redisconf到redis的安装目录的bin目录下

加密码

搜索requirepass关键字，将#requirepass foobared 注释去掉，foobared修改为密码即可

把 daemonize no 改为 daemonize yes

将redis-cli拷贝到/usr/local/bin/下，让redis-cli指令可以在任意目录下直接使用

启动命令

进入redis，进行简单的测试

进入到/usr/lib/systemd/system/目录

创建redisservice文件，内容如下

加入开机自启动

一些命令

安装配置还是比较简单，常规够用，需要扩展，可以后期再进行配置

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