SUSE Linux 15 SP2 DNS setting

 

 SUSE Linux Enterprise Server 15 SP2  DNS配置  

  SUSE 不建议手动编辑 /etc/resolv.conf 修改【临时生效】, 它是 /run/netconfig/resolv.conf 的符号链接。要定义静态 DNS 配置，请手动编辑 /etc/sysconfig/network/config 文件中的相应变量 .可只配置NETCONFIG_DNS_STATIC_SERVERS="180.76.76.76 223.3.3.3" 添加DNS解析。

 

内置变量

1.NETCONFIG_DNS_STATIC_SEARCHLIST     用于主机名查找的 DNS 域名列表

2.NETCONFIG_DNS_STATIC_SERVERS        用于主机名查找的名称服务器 IP 地址列表

3.NETCONFIG_DNS_FORWARDER        需要配置的 DNS 转发器名称，例如 `bind` 或 `resolver`

4.NETCONFIG_DNS_RESOLVER_OPTIONS

将写入到 `/var/run/netconfig/resolv.conf` 的任意选项，

例如：debug attempts:1 timeout:10

5.NETCONFIG_DNS_RESOLVER_SORTLIST

最多包含 10 项的列表，例如：130.155.160.0/255.255.240.0 130.155.0.0

6.NETCONFIG_DNS_POLICY=''       netconfig 禁用 DNS 配置 

默认配置

# egrep -v '^#|^$' /etc/sysconfig/network/config
AUTO6_WAIT_AT_BOOT=""
AUTO6_UPDATE=""
LINK_REQUIRED="auto"
WICKED_DEBUG=""
WICKED_LOG_LEVEL=""
CHECK_DUPLICATE_IP="yes"
SEND_GRATUITOUS_ARP="auto"
DEBUG="no"
WAIT_FOR_INTERFACES="30"
FIREWALL="yes"
NM_ONLINE_TIMEOUT="30"
NETCONFIG_MODULES_ORDER="dns-resolver dns-bind dns-dnsmasq nis ntp-runtime"
NETCONFIG_VERBOSE="no"
NETCONFIG_FORCE_REPLACE="no"
NETCONFIG_DNS_POLICY="auto"
NETCONFIG_DNS_FORWARDER="resolver"
NETCONFIG_DNS_FORWARDER_FALLBACK="yes"
NETCONFIG_DNS_STATIC_SEARCHLIST=""
NETCONFIG_DNS_STATIC_SERVERS=""
NETCONFIG_DNS_RANKING="auto"
NETCONFIG_DNS_RESOLVER_OPTIONS=""
NETCONFIG_DNS_RESOLVER_SORTLIST=""
NETCONFIG_NTP_POLICY="auto"
NETCONFIG_NTP_STATIC_SERVERS=""
NETCONFIG_NIS_POLICY="auto"
NETCONFIG_NIS_SETDOMAINNAME="yes"
NETCONFIG_NIS_STATIC_DOMAIN=""
NETCONFIG_NIS_STATIC_SERVERS=""
WIRELESS_REGULATORY_DOMAIN=''

推荐修改操作

# egrep -v '^#|^$' /etc/sysconfig/network/config
AUTO6_WAIT_AT_BOOT=""
AUTO6_UPDATE=""
LINK_REQUIRED="auto"
WICKED_DEBUG=""
WICKED_LOG_LEVEL=""
CHECK_DUPLICATE_IP="yes"
SEND_GRATUITOUS_ARP="auto"
DEBUG="no"
WAIT_FOR_INTERFACES="30"
FIREWALL="yes"
NM_ONLINE_TIMEOUT="30"
NETCONFIG_MODULES_ORDER="dns-resolver dns-bind dns-dnsmasq nis ntp-runtime"
NETCONFIG_VERBOSE="no"
NETCONFIG_FORCE_REPLACE="no"
NETCONFIG_DNS_POLICY="auto"
NETCONFIG_DNS_FORWARDER="resolver"
NETCONFIG_DNS_FORWARDER_FALLBACK="yes"
NETCONFIG_DNS_STATIC_SEARCHLIST=""
NETCONFIG_DNS_STATIC_SERVERS="180.76.76.76 223.3.3.3"
NETCONFIG_DNS_RANKING="auto"
NETCONFIG_DNS_RESOLVER_OPTIONS="debug attempts:1 timeout:10"
NETCONFIG_DNS_RESOLVER_SORTLIST="180.76.76.76 223.6.6.6"
NETCONFIG_NTP_POLICY="auto"
NETCONFIG_NTP_STATIC_SERVERS=""
NETCONFIG_NIS_POLICY="auto"
NETCONFIG_NIS_SETDOMAINNAME="yes"
NETCONFIG_NIS_STATIC_DOMAIN=""
NETCONFIG_NIS_STATIC_SERVERS=""
WIRELESS_REGULATORY_DOMAIN=''

重启网络生效

推荐使用重启网络，不推荐使用 ip  link set down eth0  && ip link set up eth0 

重启网络 
#systemctl restart network

重启网卡，此方法会断连
 ip  link set down eth0  && ip link set up eth0 

验证

# cat /etc/resolv.conf 
nameserver 180.76.76.76
nameserver 223.3.3.3

 一键执行修改查看

$sudo sed -i.bak '/NETCONFIG_DNS_STATIC_SERVERS/s/NETCONFIG_DNS_STATIC_SERVERS=""/NETCONFIG_DNS_STATIC_SERVERS="180.76.76.76  114.114.114"/'   /etc/sysconfig/network/config   &&  systemctl restart network  &&  cat /etc/resolv.conf

 

 

参考官方说明文档

https://documentation.suse.com/zh-cn/sles/15-SP2/pdf/book-sle-deployment_color_zh_cn.pdf

https://documentation.suse.com/zh-cn/sles/15-SP2/html/SLES-all/cha-dns.html#sec-dns-basic

https://documentation.suse.com/zh-cn/sles/15-SP2/html/SLES-all/book-sle-admin.html

https://documentation.suse.com/zh-cn/sles/15-SP2/html/SLES-all/cha-network.html#tab-netz-param-hostconf

https://documentation.suse.com/zh-cn/sles/15-SP2/html/SLES-all/cha-network.html#dat-netz-etc-resolv-conf