环境

Ubuntu 18.04
Port 6379
Redis version 5:4.0.9-1

1-安装

apt install redis

2-安装完成-自启时提示启动服务失败

Errors were encountered while processing:
 redis-server
 redis
E: Sub-process /usr/bin/dpkg returned an error code (1)
W: Operation was interrupted before it could finish
root@iZ2zeiudkwjc07o9jfa4fgZ:/var/log/nginx# systemctl status redis-server.service
● redis-server.service - Advanced key-value store
   Loaded: loaded (/lib/systemd/system/redis-server.service; disabled; vendor preset: enabled)
   Active: activating (start) since Fri 2019-01-25 15:15:44 CST; 20s ago
     Docs: http://redis.io/documentation,
           man:redis-server(1)
  Process: 28248 ExecStart=/usr/bin/redis-server /etc/redis/redis.conf (code=exited, status=0/SUCCESS)
    Tasks: 0 (limit: 2325)
   CGroup: /system.slice/redis-server.service

Jan 25 15:15:44 iZ2zeiudkwjc07o9jfa4fgZ systemd[1]: Starting Advanced key-value store...
Jan 25 15:15:44 iZ2zeiudkwjc07o9jfa4fgZ systemd[1]: redis-server.service: Can't open PID file /var/run/redis/redis-server.pid (yet?) after start: No such file or directory

3-查看日志信息

cat /var/log/redis/redis-server.log
#提示
 Creating Server TCP listening socket ::1:6379: bind: Cannot assign requested address
 oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

4-初步分析

主机上禁用了IPv6，而Ubuntu的redis-server软件包（版本5：4.0.9-1）附带了：绑定127.0.0.1 :: 1

5-解决办法

修改redis配置文件中的 bind 地址；注释 bind 地址或将 bind 地址修改为 0.0.0.0

vim /etc/redis/redis.conf
// 注释bind地址
#bind 127.0.0.1 ::1
//或修改bind地址-并允许其开放访问
bind 0.0.0.0

6-启动redis 服务

service redis-server start

7-检查服务及端口

systemctl status redis-server
//提示信息
#redis-server.service - Advanced key-value store
#Active: active (running) since Fri 2019-01-25 15:24:47 CST; 41min ago

netstat -ntpl | grep 6379
//提示信息
#tcp        0      0 0.0.0.0:6379            0.0.0.0:*               LISTEN      28507/redis-server