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无法启动 systemd-resolved.service。systemd-resolved.service: 失败，结果为“资源”。[1]: 无法启动网络名称解析

tag-icon • tag-icon dns systemd services systemd-resolved
无法启动 systemd-resolved.service。systemd-resolved.service: 失败，结果为“资源”。[1]: 无法启动网络名称解析

主要问题是：

# systemctl status systemd-resolved.service

systemd-resolved.service -
Network Name Resolution Loaded: loaded (/lib/systemd/system/systemd-resolved.service; enabled; vendor preset: enabled)
Active: failed (Result: resources) since Wed 2021-05-19 11:15:15 UTC; 23s ago
Docs: man:systemd-resolved.service(8)
https://www.freedesktop.org/wiki/Software/systemd/resolved
https://www.freedesktop.org/wiki/Software/systemd/writing-network-configuration-managers
https://www.freedesktop.org/wiki/Software/systemd/writing-resolver-clients

May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Service has no hold-off time, scheduling restart.
May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
May 19 11:15:15 kv-server systemd[1]: Stopped Network Name Resolution.
May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Start request repeated too quickly.
May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Failed with result 'resources'.
May 19 11:15:15 kv-server systemd[1]: Failed to start Network Name Resolution.

我通过以下步骤解决了这个问题：

apt-get update失败了。我开始按照以下答案https://askubuntu.com/a/91590/1042537

这解释了该问题并将错误指向了 DNS。

为了配置 DNS 服务器，我按照https://stackoverflow.com/a/54460886/14950576。

我也# chattr +i /etc/resolv.conf这样做了，这样 resolv.conf 就不会被 DHCP 更新

我试过了# ping google.com但还是失败了。

我发现了一个坏的符号链接/etc/resolv.conf -> /run/systemd/resolve/stub-resolve.conf ，所以我尝试访问/run/systemd/resolve/stub-resolve.conf

收到错误，表示没有目录/run/systemd/resolve

所以我跟着https://unix.stackexchange.com/a/613143并得知那systemd-resolved.service并没有运行。

我得到的错误是

# systemctl enable --now systemd-resolved.service
Job for systemd-resolved.service failed because of unavailable resources or another system error.
See "systemctl status systemd-resolved.service" and "journalctl -xe" for details.

当我尝试开始这样做时，我遇到了主要问题。

因此网络名称解析无法启动。

答案1

我是一名新手投稿人。希望得到建议来改进答案！！

尽管很多错误都是由#systemctl status systemd-resolved.service 资源问题引发的。

此问题是由于缺少tmp目录引起的var

即/var/tmp/缺席。

解决方案：

mkdir /var/tmp
chmod 777 /var/tmp

777 权限是不好的做法对于网络服务器，因为它为每个用户提供读/写权限。因此请适当使用它

然后为了启动服务，我执行以下操作：

systemctl enable --now systemd-resolved.service

然后，ping google.com给出成功的结果。

解决方案的灵感来自于https://www.raspberrypi.org/forums/viewtopic.php?t=249619

PS:对于其他错误：

May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Service has no hold-off time, scheduling restart.
May 19 11:15:15 kv-server systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.

您可以查看https://serverfault.com/a/1032451

有关 systemd-resolved 名称解析的优质资源请查看：

https://www.youtube.com/watch?v=DtFjrJdnWAU

https://moss.sh/name-resolution-issue-systemd-resolved/

https://unix.stackexchange.com/questions/328131/how-to-troubleshoot-dns-with-systemd-resolved

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