me: Option<Job> = None Zola 2025-09-02T00:00:00+00:00 https://prompt.eu.org/tags/linux/atom.xml 2025-09-02T00:00:00+00:00 2025-09-02T00:00:00+00:00 swhr https://prompt.eu.org/notes/arch-vps-no-internet/ <h2 id="bug">bug</h2> <p>大妈的一台vps安装的是面板提供的arch镜像，一直在滚动更新。2026年4月10日维护后发现连不上，只能通过后台console进入。发现没有获取到ip。</p> <h2 id="tldr">tldr</h2> <p>1.2-1版本的netplan包<sup class="footnote-reference" id="fr-1-1"><a href="#fn-1">1</a></sup> 引入了两个有影响的改动<sup class="footnote-reference" id="fr-2-1"><a href="#fn-2">2</a></sup>：</p> <ul> <li>generate/configure 被分开，导致需要手动enable <code>netplan-configure.service</code>，否则不会生成networkd的运行时配置</li> <li><code>systemd-networkd-wait-online</code>增加了<code>--dns</code>flag，导致其依赖于system-resolved.service</li> </ul> <p>解决方法:</p> <pre class="giallo z-code"><code data-lang="shellscript"><span class="giallo-l"><span class="z-entity z-name z-entity z-name z-function">sudo</span><span class="z-string"> systemctl</span><span class="z-string"> enable</span><span class="z-constant z-constant z-other"> -</span><span class="z-constant z-constant z-other">-now</span><span class="z-string"> netplan-configure.service</span></span> <span class="giallo-l"><span class="z-entity z-name z-entity z-name z-function">sudo</span><span class="z-string"> systemctl</span><span class="z-string"> unmask</span><span class="z-string"> systemd-resolved</span><span class="z-punctuation z-punctuation z-separator"> &amp;&amp;</span><span class="z-entity z-name z-entity z-name z-function"> sudo</span><span class="z-string"> systemctl</span><span class="z-string"> enable</span><span class="z-constant z-constant z-other"> -</span><span class="z-constant z-constant z-other">-now</span><span class="z-string"> systemd-resolved</span></span></code></pre><h2 id="jie-jue-guo-cheng">解决过程</h2> <ul> <li>检查网卡名字变化 <ul> <li>没有变化</li> </ul> </li> <li>检查失败的systemd服务 <ul> <li>只有<code>systemd-networkd-wait-online.service</code></li> </ul> </li> <li>手动写了<code>/etc/systemd/network/20-wired.network</code>，通过DHCP获取了地址 <ul> <li>后缀名重要</li> </ul> </li> <li>奇怪之前的配置为什么不需要手动干预 <ul> <li>发现cloud-init <ul> <li><code>/var/lib/cloud/</code>下有获取的配置信息 <ul> <li>之前是静态分配的ip</li> </ul> </li> <li>知道了 datasource 和 renderer 的概念</li> </ul> </li> <li>为什么现在没有被render <ul> <li><code>systemd-networkd-wait-online.service</code>的log里有<code>Failed to connect to io.systemd.Resolve.Monitor</code> <ul> <li><code>systemctl cat</code> 和 service 文件不一致</li> <li>发现 systemctl generator 和 drop-in</li> </ul> </li> <li>被<code>netplan</code>的generator修改了，增加了<code>--dns</code>的flag</li> <li>enable 了<code>systemd-resolvd.service</code></li> <li>知道了 netplan，发现<code>/etc/netplan/50-cloud-init.yaml</code>，之前的 renderer 应该是 netplan <ul> <li><code>netplan apply</code>后成功生成<code>/run/systemd/network/</code>下的配置，</li> <li>但是重启后不会自动生成</li> <li><code>paru -Ql netplan | rg service</code> 发现 <code>netplan-configure.service</code></li> <li>启用后正常，问题解决</li> </ul> </li> <li>去netplan项目页找更新日志，结合vps的重启记录，发现是4月2日的更新引入新版 netplan，而<code>netplan-configure.service</code> 当时未启用，4月10号维护的重启只不过是提前暴露了问题</li> </ul> </li> </ul> </li> </ul> <section class="footnotes"> <ol class="footnotes-list"> <li id="fn-1"> <p><a rel="external" href="https://gitlab.archlinux.org/archlinux/packaging/packages/netplan/-/commit/9a988edd4869dfc0be9d3306da47d6a0404740e2">upgpkg: 1.2-1 (9a988edd)</a> <a href="#fr-1-1">↩</a></p> </li> <li id="fn-2"> <p><a rel="external" href="https://github.com/canonical/netplan/releases/tag/1.2">Release Netplan v1.2 · canonical/netplan</a> <a href="#fr-2-1">↩</a></p> </li> </ol> </section>