redis 设置了 bind 后开机自启动报错

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虚拟机中安装的redis​ ，在配置文件中设置了 bind​ ，开机自启动时遇到：

[root@localhost ~]# tail -f /var/log/redis/redis.log
849:C 18 Apr 2024 07:18:49.475 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
849:C 18 Apr 2024 07:18:49.476 # Redis version=5.0.3, bits=64, commit=00000000, modified=0, pid=849, just started
849:C 18 Apr 2024 07:18:49.476 # Configuration loaded
849:C 18 Apr 2024 07:18:49.476 * supervised by systemd, will signal readiness
849:M 18 Apr 2024 07:18:49.479 # Could not create server TCP listening socket 192.168.133.130:6379: bind: Cannot assign requested address
849:M 18 Apr 2024 07:18:49.479 # Configured to not listen anywhere, exiting.

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​redis​ 服务的 systemd​ 脚本中，After​ 默认指定的是 network.target​，将其改为 network-online.target​

​network.target​ 是一个系统级别的目标，它代表着网络服务已经启动并准备好提供服务。它是网络服务的默认目标，也是多数网络服务所依赖的目标。

​network-online.target​ 是一个延伸的系统级别的目标，它代表着网络连接已经建立，并且可以提供 Internet 访问。它可以被用来作为其他服务的依赖，以确保这些服务在网络连接已经建立之后再启动。

[Unit]
Description=Redis persistent key-value database
#After=network.target
After=network-online.target

[Service]
ExecStart=/usr/bin/redis-server /etc/redis.conf --supervised systemd
ExecStop=/usr/libexec/redis-shutdown
Type=notify
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target

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[root@localhost ~]# systemctl start redis
Warning: The unit file, source configuration file or drop-ins of redis.service changed on disk. Run 'systemctl daemon-reload' to reload units.
[root@localhost ~]#
[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl start redis

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参考文章：

network.target vs network-online.target

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