Ansible部署Redis集群(主从从、一主多从、哨兵)

本是古典何须时尚 2022-12-02 13:46 408阅读 0赞

<table> 
 <thead> 
  <tr> 
   <th>角色</th> 
   <th>实例IP</th> 
   <th>实例端口</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>master</td> 
   <td>192.168.122.11</td> 
   <td>6379</td> 
  </tr> 
  <tr> 
   <td>slave01</td> 
   <td>192.168.122.12</td> 
   <td>6379</td> 
  </tr> 
  <tr> 
   <td>slave02</td> 
   <td>192.168.122.13</td> 
   <td>6379</td> 
  </tr> 
 </tbody> 
</table>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center]

**0、安装配置集群管理工具Ansible**

[root@redis01 ~]# wget https://mirrors.aliyun.com/epel/7/x86_64/Packages/e/epel-release-7-12.noarch.rpm
    [root@redis01 ~]# rpm -Uvh epel-release-7-12.noarch.rpm 
    [root@redis01 ~]# yum install -y ansible
    [root@redis01 ~]# echo '
    [redis]
    192.168.122.[11:13] ansible_ssh_user="root" ansible_ssh_pass="a" ansible_su_pass="a"
    ' >> /etc/ansible/hosts

测试： `ansible redis -m command -a 'who'`

**1、带认证的主从从**  
redis批量部署

[root@redis01 ~]# wget http://download.redis.io/releases/redis-6.0.6.tar.gz
    [root@redis01 ~]# ansible redis -m copy -a 'src=/root/redis-6.0.6.tar.gz dest=/root/redis-6.0.6.tar.gz owner=root group=root mode=0644'
    [root@redis01 ~]# ansible redis -m command -a 'tar xzf /root/redis-6.0.6.tar.gz && cd /root/redis-6.0.6 && make'
    [root@redis01 ~]# ansible redis -m command -a "sed -i 's/^daemonize no/daemonize yes/p' /root/redis-6.0.6/redis.conf"
    [root@redis01 ~]# ansible redis -m command -a "/root/redis-6.0.6/src/redis-server /root/redis-6.0.6/redis.conf"

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 1]  
**1.1 主节点\[redis01\]配置**

!停止服务
    [root@redis01 redis-6.0.6]# netstat -anultp | grep redis |awk '{print $7}'| awk -F/ '{print $1}' |xargs kill
    !修改配置文件
    [root@redis01 redis-6.0.6]# diff redis.conf.bak redis.conf
    69c69
    < bind 127.0.0.1
    ---
    > #bind 127.0.0.1
    786c786
    < # requirepass foobared
    ---
    > requirepass 123456
    !启动服务
    [root@redis01 redis-6.0.6]# src/redis-server redis.conf

**1.2 从节点\[redis02\]配置**

!停止服务
    [root@redis02 redis-6.0.6]# netstat -anultp | grep redis |awk '{print $7}'| awk -F/ '{print $1}' |xargs kill
    !修改配置文件
    [root@redis02 redis-6.0.6]# diff redis.conf.bak redis.conf
    69c69
    < bind 127.0.0.1
    ---
    > #bind 127.0.0.1
    88c88
    < protected-mode yes
    ---
    > protected-mode no
    385c385
    < # replicaof <masterip> <masterport>
    ---
    > replicaof 192.168.122.11 6379
    392c392
    < # masterauth <master-password>
    ---
    > masterauth 123456
    !启动服务
    [root@redis01 redis-6.0.6]# src/redis-server redis.conf

**1.3 从从节点\[redis03\]配置**

!停止服务
    [root@redis03 redis-6.0.6]# netstat -anultp | grep redis |awk '{print $7}'| awk -F/ '{print $1}' |xargs kill
    !修改配置文件
    [root@redis03 redis-6.0.6]# diff redis.conf.bak redis.conf
    69c69
    < bind 127.0.0.1
    ---
    > #bind 127.0.0.1
    385c385
    < # replicaof <masterip> <masterport>
    ---
    > replicaof 192.168.122.12 6379
    !启动服务
    [root@redis01 redis-6.0.6]# src/redis-server redis.conf

**1.4、带认证的主从从测试**

!检查主节点信息
    192.168.122.11> info replication
    role:master
    connected_slaves:1
    slave0:ip=192.168.122.12,port=6379,state=online,offset=2338,lag=1
    !检查从节点信息
    192.168.122.12> info replication
    role:slave
    master_host:192.168.122.11
    master_port:6379
    connected_slaves:1
    slave0:ip=192.168.122.13,port=6379,state=online,offset=90748,lag=1
    !检查从从节点信息
    192.168.122.13> info replication
    role:slave
    master_host:192.168.122.12
    master_port:6379

!主节点存数据
    192.168.122.11> set name golang
    OK
    !从节点查数据
    192.168.122.12> get name
    golang
    !从从节点查数据
    192.168.122.13> get name
    golang

**2、带认证的一主多从**  
**2.1 redis01、redis02不改动**  
**2.2 redis03配置**

!停止服务
    [root@redis03 redis-6.0.6]# netstat -anultp | grep redis |awk '{print $7}'| awk -F/ '{print $1}' |xargs kill
    !修改配置文件
    [root@redis03 redis-6.0.6]# diff redis.conf.bak redis.conf
    69c69
    < bind 127.0.0.1
    ---
    > #bind 127.0.0.1
    88c88
    < protected-mode yes
    ---
    > protected-mode no
    385c385
    < # replicaof <masterip> <masterport>
    ---
    > replicaof 192.168.122.11 6379
    392c392
    < # masterauth <master-password>
    ---
    > masterauth 123456
    !启动服务
    [root@redis01 redis-6.0.6]# src/redis-server redis.conf

**2.3、带认证的一主多从测试**

!检查主节点信息
    192.168.122.11> info replication
    role:master
    connected_slaves:2
    slave0:ip=192.168.122.12,port=6379,state=online,offset=90983,lag=1
    slave1:ip=192.168.122.13,port=6379,state=online,offset=90997,lag=0
    !检查从节点信息
    192.168.122.12> info replication
    role:slave
    master_host:192.168.122.11
    master_port:6379
    !检查从从节点信息
    192.168.122.13> info replication
    role:slave
    master_host:192.168.122.11
    master_port:6379

!主节点存数据
    192.168.122.11> set age 12
    OK
    !从节点查数据
    192.168.122.12> get age
    12
    !从从节点查数据
    192.168.122.13> get age
    12

**3、主从从  
3.0 以上需要自行切换主库，为解决该问题引入哨兵**  
**3.1 从库监控主库的存活，当发现主库挂机后，自动切换升级主库。所以只需要在从库配置哨兵  
3.2 redis02开启哨兵模式**

[root@redis02 redis-6.0.6]# echo "sentinel monitor redis01 192.168.122.11 6379 1" > /etc/redis/sentinel.conf
    [root@redis02 redis-6.0.6]# echo "sentinel auth-pass redis01 123456" >> /etc/redis/sentinel.conf
    [root@redis02 redis-6.0.6]# src/redis-sentinel /etc/redis/sentinel.conf

**3.2 关闭master**

[root@redis01 redis-6.0.6]# src/redis-cli -h 192.168.122.11 -p 6379 -a "123456" shutdown

**3.3 查看切换日志**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 3]

虽然能够切换主库，但是操作的IP是不变，如何实现切换主库的使用，客户端也自动连接到新的主库？  
[【KeepAlived实现HA】原理：使用VIP代理RIP][KeepAlived_HA_VIP_RIP]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/41b020fa9c3b4f83813b59b70af0f127.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/45ffcae49e1e459c9956cf17bac32415.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221123/9aacca36739848b18143162a3ccad4a0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTAwNTY1_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/535023e9b9924dfeaa2caef614ada5d8.png
[KeepAlived_HA_VIP_RIP]: https://zan71.com/blog/article/id=78