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CoreOS/systemd 不尊重对 solved.conf 的更改

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CoreOS/systemd 不尊重对 solved.conf 的更改

我在 openstack 环境中使用 CoreOS，并且用它cloud-config.yml来引导主机。

#cloud-config
write_files:
  - path: /etc/systemd/resolved.conf
    permissions: 0644
    owner: root
    content: |
      #  This file is part of systemd.
      #
      #  systemd is free software; you can redistribute it and/or modify it
      #  under the terms of the GNU Lesser General Public License as published by
      #  the Free Software Foundation; either version 2.1 of the License, or
      #  (at your option) any later version.
      #
      # Entries in this file show the compile time defaults.
      # You can change settings by editing this file.
      # Defaults can be restored by simply deleting this file.
      #
      # See resolved.conf(5) for details

      [Resolve]
      DNS=10.8.20.40
      # FallbackDNS=
      # LLMNR=yes

但这不会在首次启动时反映 DNS 服务器。如果我重新启动 CoreOS 主机，它就会正常工作。如何让 DNS 更改在首次启动时生效？我可以发出systemctl重新启动命令吗？

答案1

CoreOS 并未实现所有的 cloud-init 钩子。但它有一个叫做units

对于 DNS 设置，请使用如下所述的网络单元：https://coreos.com/os/docs/latest/network-config-with-networkd.html#cloud-config

答案2

我发现的最佳解决方案是/etc/resolv.conf通过write_files本例中所示的部分创建自己的解决方案云配置

#cloud-config
write_files:
  - path: "/etc/resolv.conf"
    permissions: "0644"
    owner: "root"
    content: |
      nameserver 8.8.8.8

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