正确的域设置在/etc/ correct中？

Question

目前，我正在尝试为虚拟SUSE主机配置内部企业域名设置，该操作系统是12 SP4。

SUSE主机需要解析两个域名："infra.enterprise.com“和"test.infra.enterprise.com"，并且这些SUSE主机的域名已正确设置为"infra.enterprise.com”。

域和记录都位于两个MS AD/DNS服务器(内部)上: 192.168.1.1为主服务器，192.168.1.2为次要服务器。

但是，我很困惑，应该在/etc/rupv.conf文件中添加哪些参数？

只要nameserver 192.168.1.1 192.168.1.2就行了，SUSE主机会自动解析这两个域吗？

还是我应该加上domain infra.enterprise.com？

search infra.enterprise.com test.infra.enterprise.com呢？

这会影响SUSE主机解决来自这两个域的所有FQDN吗？

Answer 1

表格手册：

   nameserver Name server IP address
          Internet address of a name server that the resolver should
          query, either an IPv4 address (in dot notation), or an
          IPv6 address in colon (and possibly dot) notation as per
          RFC 2373.  Up to MAXNS (currently 3, see <resolv.h>) name
          servers may be listed, one per keyword.  If there are
          multiple servers, the resolver library queries them in the
          order listed.  If no nameserver entries are present, the
          default is to use the name server on the local machine.
          (The algorithm used is to try a name server, and if the
          query times out, try the next, until out of name servers,
          then repeat trying all the name servers until a maximum
          number of retries are made.)

   search Search list for host-name lookup.
          By default, the search list contains one entry, the local
          domain name.  It is determined from the local hostname
          returned by gethostname(2); the local domain name is taken
          to be everything after the first '.'.  Finally, if the
          hostname does not contain a '.', the root domain is
          assumed as the local domain name.

          This may be changed by listing the desired domain search
          path following the search keyword with spaces or tabs
          separating the names.  Resolver queries having fewer than
          ndots dots (default is 1) in them will be attempted using
          each component of the search path in turn until a match is
          found.  For environments with multiple subdomains please
          read options ndots:n below to avoid man-in-the-middle
          attacks and unnecessary traffic for the root-dns-servers.
          Note that this process may be slow and will generate a lot
          of network traffic if the servers for the listed domains
          are not local, and that queries will time out if no server
          is available for one of the domains.

          If there are multiple search directives, only the search
          list from the last instance is used.

          In glibc 2.25 and earlier, the search list is limited to
          six domains with a total of 256 characters.  Since glibc
          2.26, the search list is unlimited.

          The domain directive is an obsolete name for the search
          directive that handles one search list entry only.

因此，nameserver是服务器，通过解析器(如果提供的话)依次用于查询。搜索选项可以用于多个子域，但有一定的限制。

Answer 2

nameserver只允许一个参数。

正确的做法是：

nameserver 192.168.1.1
nameserver 192.168.1.2

这将允许您解析完全限定的域名。但是，仅这一点不允许您在没有FQDN的情况下解析简单的主机名。

例如，如果希望运行ping infra并希望它解析infra.example.com，则需要将其添加为搜索域。

search example.com

这将允许您将infra解析为infra.example.com。