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Since both Redis servers are installed on the Linux operating system, and the two Redis servers will switch when the Master master server fails, it must be ensured that the port numbers of the two Redis servers have been added to the firewall, or the firewalls of the two Linux operating systems have been shut down, otherwise Master-link-Status: down will be prompted, and Master master server is not connected. There are two solutions: the first is to shut down the firewalls of the two Linux operating systems; The second method is to add the port number of each Redis service to the firewall to allow communication through the port number. You can use the command "firewall-cmd-query-port=6379/tcp" first. If the result is No, you can continue to execute the following command "firewall-cmd-add-port=6379/tcp". After the command is executed, you will return Success, indicating that the increase was successful. In this way, Redis servers on the two Linux systems can be switched smoothly to perform sentinel mode operations.　　造型指导：杨威|王昊该剧讲述了到了及笄之年该出嫁的嫡公主孟玉珥，一连克死了四个准驸马，不仅纳夫之路坎坷，而且还被卷入惊天谜案。九王爷希白川征战归来，便出现了神秘的血雨腥风，掀起埋藏已久的前尘波澜，冥冥之中他与公主殿下的关系也日渐暧昧起来。“无脸女尸案”、“起死回生画骨香暗”等，一桩桩神秘离奇的案件背后，牵扯出了一段段不为人知的过往。尘封的迷雾终将散去，前尘今朝的羁绊，不为人知的暗涌......远方良人，竟是那个曾经“不靠谱不着调“的九皇叔希白川。你们错了，但是你们根本没弄清楚到底是错在哪里了。林聪心中一惊，只怕局势有变。借着微弱的星光细一打量，前后都不靠村，两旁都是荒野田地，黑黢黢望不到尽头。