Loading... <p class="MsoNormal"> <b><span style="font-size:16pt"><span style="font-family:Microsoft YaHei">接着上一章节来</span><span style="font-family:'Microsoft YaHei'">:</span></span></b> </p> <p class="MsoNormal"> <b><span style="font-size:16pt;font-family:'Microsoft YaHei'">Redis</span></b><b><span style="font-size:16pt"><span style="font-family:Microsoft YaHei">基于</span><span style="font-family:'Microsoft YaHei'">keepalived</span><span style="font-family:Microsoft YaHei">的高可用实现</span></span></b> </p> <h2> <span style="font-family:Microsoft YaHei">方案拓扑图</span><br /> </h2> <p> <img src="//cto.wang/usr/uploads/2016/07/20160703155712-76.png" alt="" /> </p> <p class="MsoNormal"> <span></span> </p> <h2> <span style="font-family:Microsoft YaHei">测试方案</span><br /> </h2> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">1.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">手动关闭</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">主从变化</span><span style="font-family:'Microsoft YaHei';font-size:12px">,AppS1</span><span style="font-family:'Microsoft YaHei';font-size:12px">是否变更为主</span><span></span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">2.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">开启</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived,</span><span style="font-family:'Microsoft YaHei';font-size:12px">手动关闭</span> <span style="font-family:'Microsoft YaHei';font-size:12px">AppM redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">ipvsadm ip</span><span style="font-family:'Microsoft YaHei';font-size:12px">池是否剔除</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM</span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">3.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">开启</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程</span><span style="font-family:'Microsoft YaHei';font-size:12px">,</span><span style="font-family:'Microsoft YaHei';font-size:12px">确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM</span><span style="font-family:'Microsoft YaHei';font-size:12px">是否变更为主</span><span></span> </p> <h2> <span style="font-family:Microsoft YaHei">环境准备</span><span></span><br /> </h2> <h3> <span style="font-family:Microsoft YaHei">服务器信息</span><br /> </h3> <p> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-44.png" alt="" /> </p> <h3> <span style="font-family:Microsoft YaHei">配置服务器</span><span style="font-family:'Microsoft YaHei'">host</span><br /> </h3> <p class="MsoNormal"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">在</span><span style="font-family:'Microsoft YaHei';font-size:12px">Manager</span><span style="font-family:'Microsoft YaHei';font-size:12px">机器上配置好</span><span style="font-family:'Microsoft YaHei';font-size:12px">hosts</span><span style="font-family:'Microsoft YaHei';font-size:12px">后通过</span><span style="font-family:'Microsoft YaHei';font-size:12px">ansible</span><span style="font-family:'Microsoft YaHei';font-size:12px">下发到所有应用服务器</span><span></span></span> </p> <p class="MsoNormal"> <span><span style="font-family:Microsoft YaHei"><img src="//cto.wang/usr/uploads/2016/07/20160703155713-35.png" alt="" /><br /> </span></span> </p> <pre class="prettyprint lang-bsh"># ansible app -m copy -a "src=/etc/hosts dest=/etc/hosts owner=root group=root mode=0644 backup=yes"</pre> <p> </p> <p class="MsoNormal"> <i><span style="font-family:'Microsoft YaHei';font-size:12px">//</span></i><i><span style="font-family:'Microsoft YaHei';font-size:12px">抽查对应服务器确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">host</span></i><i><span style="font-family:'Microsoft YaHei';font-size:12px">无误后继续</span><span></span></i> </p> <h3> <span style="font-family:Microsoft YaHei">安装配置</span><span style="font-family:'Microsoft YaHei'">keepalived</span><br /> </h3> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">//</span><span><span style="font-family:'Microsoft YaHei';font-size:12px">安装</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived ipvsadm</span></span> </p> <p class="MsoNormal"> <span><span style="font-family:'Microsoft YaHei';font-size:12px"> </span></span> </p> <pre class="prettyprint lang-bsh"># ansible app -m command -a 'yum install keepalived ipvsadm -y'</pre> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">/</span><span style="font-family:'Microsoft YaHei';font-size:12px">/</span><span style="font-family:'Microsoft YaHei';font-size:12px">分发配置文件</span> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px"> </span> </p> <pre class="prettyprint lang-bsh"># ansible AppM -m copy -a 'src=/data/ansible/config/keepalived/keepalived.conf-redis-Mrds dest=/etc/keepalived/keepalived.conf backup=yes' # ansible apps -m copy -a 'src=/data/ansible/config/keepalived/keepalived.conf-redis-Srds dest=/etc/keepalived/keepalived.conf backup=yes' </pre> <p></p> <p> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">//</span><span style="font-family:'Microsoft YaHei';font-size:12px">登录</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppS2<br /> AppS3</span><span style="font-family:'Microsoft YaHei';font-size:12px">修改</span><span style="font-family:'Microsoft YaHei';font-size:12px">priority</span><span style="font-family:'Microsoft YaHei';font-size:12px">值</span><span></span> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">//</span><span style="font-family:'Microsoft YaHei';font-size:12px">运行</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived</span> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px"> </span> </p> <pre class="prettyprint lang-bsh"># ansible app -m command -a 'service keepalived restart' # ansible app -m command -a 'pidof keepalived'</pre> <p></p> <p> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-70.png" alt="" /> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">//ip</span><span style="font-family:'Microsoft YaHei';font-size:12px">池</span><span></span> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-93.png" alt="" /> </p> <h2> <span style="font-family:'Microsoft YaHei';font-size:12px">测试</span><span></span><br /> </h2> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">1.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">手动关闭</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">主从变化</span><span style="font-family:'Microsoft YaHei';font-size:12px">,AppS1</span><span style="font-family:'Microsoft YaHei';font-size:12px">是否变更为主</span><span></span> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-28.png" alt="" /> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-35-1.png" alt="" /> </p> <p class="MsoListParagraph" style="margin-left:36.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">a></span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">Vip</span><span style="font-family:'Microsoft YaHei';font-size:12px">资源已切换至</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppS1,</span><span style="font-family:'Microsoft YaHei';font-size:12px">但同时我们也发现</span><span style="font-family:'Microsoft YaHei';font-size:12px">redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">主从并没有切换</span><span></span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">2.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">开启</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived,</span><span style="font-family:'Microsoft YaHei';font-size:12px">手动关闭</span><span style="font-family:'Microsoft YaHei';font-size:12px"> AppM redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">ipvsadm ip</span><span style="font-family:'Microsoft YaHei';font-size:12px">池是否剔除</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM</span> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-60.png" alt="" /> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">3.</span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">开启</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">进程</span><span style="font-family:'Microsoft YaHei';font-size:12px">,</span><span style="font-family:'Microsoft YaHei';font-size:12px">确认</span><span style="font-family:'Microsoft YaHei';font-size:12px">AppM</span><span style="font-family:'Microsoft YaHei';font-size:12px">是否变更为主</span><span></span> </p> <p class="MsoNormal"> <img src="//cto.wang/usr/uploads/2016/07/20160703155713-88.png" alt="" /> </p> <p class="MsoNormal"> <span style="font-family:'Microsoft YaHei';font-size:12px">Redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">会立刻同步服务到</span><span style="font-family:'Microsoft YaHei';font-size:12px">ip</span><span style="font-family:'Microsoft YaHei';font-size:12px">池</span> </p> <h2> <span style="font-family:Microsoft YaHei">小总</span><span></span><br /> </h2> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">a></span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">Keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">相对</span><span style="font-family:'Microsoft YaHei';font-size:12px">heartbeat</span><span style="font-family:'Microsoft YaHei';font-size:12px">要轻量简单</span><span style="font-family:'Microsoft YaHei';font-size:12px">,ipvsadm</span><span style="font-family:'Microsoft YaHei';font-size:12px">也由</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">协助完成</span><span></span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">b></span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">Keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">的</span><span style="font-family:'Microsoft YaHei';font-size:12px">redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">应用场景需多</span><span style="font-family:'Microsoft YaHei';font-size:12px">master</span><span style="font-family:'Microsoft YaHei';font-size:12px">且</span><span style="font-family:'Microsoft YaHei';font-size:12px">mater</span><span style="font-family:'Microsoft YaHei';font-size:12px">互为同步</span><span style="font-family:'Microsoft YaHei';font-size:12px">,</span><span style="font-family:'Microsoft YaHei';font-size:12px">或</span><span></span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">c></span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">Keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">的响应速度极快</span><span style="font-family:'Microsoft YaHei';font-size:12px">,</span><span style="font-family:'Microsoft YaHei';font-size:12px">异常进程或实例恢复后都能迅速发现并实施既定措施</span><span></span> </p> <p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt"> <span><span style="font-family:'Microsoft YaHei';font-size:12px">d></span><span style="font-size:12px;font-family:'Microsoft YaHei'"> </span></span><span style="font-family:'Microsoft YaHei';font-size:12px">想通过</span><span style="font-family:'Microsoft YaHei';font-size:12px">redis</span><span style="font-family:'Microsoft YaHei';font-size:12px">自带的</span><span style="font-family:'Microsoft YaHei';font-size:12px">sentinel</span><span style="font-family:'Microsoft YaHei';font-size:12px">和</span><span style="font-family:'Microsoft YaHei';font-size:12px">keepalived</span><span style="font-family:'Microsoft YaHei';font-size:12px">结果会有些难度</span><span style="font-family:'Microsoft YaHei';font-size:12px">,</span><span style="font-family:'Microsoft YaHei';font-size:12px">也不建议</span> </p> <h2> <span style="font-family:Microsoft YaHei">附件</span><br /> </h2> <p class="MsoNormal"> keepalived.conf-redis-Srds </p> <p class="MsoNormal"> </p> <pre class="prettyprint">global_defs { notification_email { lisongtao@ihuilian.com } notification_email_from sa@ihuilian.com smtp_server smtp.exmail.qq.com smtp_connect_timeout 30 router_id LVS_DEVEL ##自定义的字符串 } ###在哪里找到自定义配置规范 #vrrp_script chk_nginx_down { #定义可以手动控制状态的脚本 # script "killall -0 nginx" # interval 1 #检查时间间隔 # weight - 13 #如果检测失败,优先级-13 #} vrrp_script chk_redis_down { #定义可以手动控制状态的脚本 script "killall -0 redis-server" interval 1 #检查时间间隔 weight -2 #如果检测失败,优先级-13 } vrrp_instance VI_1 { state BACKUP ###MASTER/BACKUP必须大写,且当MASTER恢复时,会自动恢复为MASTER状态 interface eth0 virtual_router_id 51 ###同一个vrrp使用相同的vrrp,整个vrrp内唯一 priority 99 ###数字越大优先级越高,且要MASTER要高于SLAVE,和sentinel恰好相反...>O< advert_int 1 ###Timeout时长秒为单位 authentication { ###MASTER和SLAVE密码相同方可正常通信 auth_type pass auth_pass huilian } virtual_ipaddress { ###每个地址占一行,不能指定子网掩码,与lvs客户端设定的VIP一致 192.168.1.200 #192.168.200.17 #192.168.200.18 } ###跟global_defs中定义的vrrp_script chk_nginx_down对应 #track_script { #引用定义的脚本 # chk_nginx_down #} track_script { #引用定义的脚本 chk_redis_down } #notify_master "/etc/keepalived/notify.sh master" #notify_backup "/etc/keepalived/notify.sh backup" #notify_fault "/etc/keepalived/notify.sh fault" } virtual_server 192.168.1.200 6379{ ###IP和vrrp_instance中定义的vip需一致,IP PORT delay_loop 6 ###健康检查时间/秒 #lb_algo wlc ###负载均衡调度算法,常用rr/wlc lb_algo rr ###负载均衡调度算法,常用rr/wlc lb_kind DR ###负载均衡转发规则, DR,NAT,TUN3 nat_mask 255.255.255.0 #persistence_timeout 50 ###会话保持时长 protocol TCP ###协议类型转发 real_server 192.168.1.36 6379{ ###real server IP PORT weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.37 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.38 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.39 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } } </pre> <p>keepalived.conf-redis-Mrds</p> <p> </p> <p class="MsoNormal"> </p> <pre class="prettyprint">global_defs { notification_email { lisongtao@ihuilian.com } notification_email_from sa@ihuilian.com smtp_server smtp.exmail.qq.com smtp_connect_timeout 30 router_id LVS_DEVEL ##自定义的字符串 } ###在哪里找到自定义配置规范 #vrrp_script chk_nginx_down { #定义可以手动控制状态的脚本 # script "killall -0 nginx" # interval 1 #检查时间间隔 # weight - 13 #如果检测失败,优先级-13 #} vrrp_script chk_redis_down { #定义可以手动控制状态的脚本 script "killall -0 redis-server" interval 1 #检查时间间隔 weight -2 #如果检测失败,优先级-13 } vrrp_instance VI_1 { state MASTER ###MASTER/BACKUP必须大写,且当MASTER恢复时,会自动恢复为MASTER状态 interface eth0 virtual_router_id 51 ###同一个vrrp使用相同的vrrp,整个vrrp内唯一 priority 100 ###数字越大优先级越高,且要MASTER要高于SLAVE,和sentinel恰好相反...>O< advert_int 1 ###Timeout时长秒为单位 authentication { ###MASTER和SLAVE密码相同方可正常通信 auth_type pass auth_pass huilian } virtual_ipaddress { ###每个地址占一行,不能指定子网掩码,与lvs客户端设定的VIP一致 192.168.1.200 #192.168.200.17 #192.168.200.18 } ###跟global_defs中定义的vrrp_script chk_nginx_down对应 #track_script { #引用定义的脚本 # chk_nginx_down #} track_script { #引用定义的脚本 chk_redis_down } #notify_master "/etc/keepalived/notify.sh master" #notify_backup "/etc/keepalived/notify.sh backup" #notify_fault "/etc/keepalived/notify.sh fault" } virtual_server 192.168.1.200 6379{ ###IP和vrrp_instance中定义的vip需一致,IP PORT delay_loop 6 ###健康检查时间/秒 #lb_algo wlc ###负载均衡调度算法,常用rr/wlc lb_algo rr ###负载均衡调度算法,常用rr/wlc lb_kind DR ###负载均衡转发规则, DR,NAT,TUN3 nat_mask 255.255.255.0 #persistence_timeout 50 ###会话保持时长 protocol TCP ###协议类型转发 real_server 192.168.1.36 6379{ ###real server IP PORT weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.37 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.38 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } real_server 192.168.1.39 6379{ weight 1 ###数值越大,权重越大 TCP_CHECK { connect_timeout 1 #表示3秒无响应,则超时 nb_get_retry 3 #表示重试次数 delay_before_retry 3 #表示重试间隔 connect_port 6379 #表示重试间隔 } } } </pre> <p> </p> <p class="MsoNormal"> <b><span style="font-size:18pt;font-family:'Microsoft YaHei'">下章节预告</span></b><b><span style="font-size:18pt;font-family:'Microsoft YaHei'">:</span></b> </p> <p class="MsoNormal"> <b><span style="font-size:18pt;font-family:'Microsoft YaHei'">twemproxy + keepalived </span></b><b><span style="font-size:18pt;font-family:'Microsoft YaHei'">实现</span></b><b><span style="font-size:18pt;font-family:'Microsoft YaHei'">redis</span></b><b><span style="font-size:18pt;font-family:'Microsoft YaHei'">的分布式高可用</span></b> </p> <p> </p> 最后修改:2021 年 12 月 10 日 10 : 53 AM © 允许规范转载 赞赏 如果觉得我的文章对你有用,请随意赞赏 赞赏作者 支付宝微信