1.2. IdM 如何确保 NetworkManager 不会删除 /etc/resolv.conf 中的全局转发器
了解身份管理(IdM)如何配置 NetworkManager，以在 DHCP 网络上的 /etc/resolv.conf 中保留 DNS 设置。
安装带有集成 DNS 的 IdM 配置 /etc/resolv.conf 文件以指向 127.0.0.1 localhost 地址：
# Generated by NetworkManager
search idm.example.com
nameserver 127.0.0.1
在某些情况下，如使用 动态主机配置 协议(DHCP)的网络，NetworkManager 服务可能会恢复对 /etc/resolv.conf 文件的更改。为了使 DNS 配置持久，IdM DNS 安装过程还通过以下方式配置 NetworkManager 服务：
DNS 安装脚本会创建一个
/etc/NetworkManager/conf.d/zzz-ipa.confNetworkManager配置文件来控制搜索顺序和 DNS 服务器列表：# auto-generated by IPA installer [main] dns=default [global-dns] searches=$DOMAIN [global-dns-domain-*] servers=127.0.0.1-
NetworkManager服务已重新加载，该服务始终使用/etc/NetworkManager/conf.d/目录中的最后一个文件中的设置来创建/etc/resolv.conf文件。这时为zzz-ipa.conf文件。
重要
不要手动修改 /etc/resolv.conf 文件。
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