SUSE Linux Enterprise Server 15 SP2  DNS配置

SUSE 不支援手動編輯 /etc/resolv.conf 修改, 它是 /run/netconfig/resolv.conf 的符號連結。要定義靜態 DNS 配置，請手動編輯 /etc/sysconfig/network/config 檔案中的相應變數 .可只配置NETCONFIG_DNS_STATIC_SERVERS="180.76.76.76 223.3.3.3" 新增DNS解析

內建變數

1.NETCONFIG_DNS_STATIC_SEARCHLIST     用於主機名查詢的 DNS 域名列表

2.NETCONFIG_DNS_STATIC_SERVERS        用於主機名查詢的名稱伺服器 IP 地址列表

 
3.NETCONFIG_DNS_FORWARDER        需要配置的 DNS 轉發器名稱，例如 `bind` 或 `resolver`

4.NETCONFIG_DNS_RESOLVER_OPTIONS

將寫入到 `/var/run/netconfig/resolv.conf` 的任意選項，

例如：debug attempts:1 timeout:10

5.NETCONFIG_DNS_RESOLVER_SORTLIST

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

6.NETCONFIG_DNS_POLICY=''       netconfig 禁用 DNS 配置 

預設配置

# 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=''

推薦修改操作

# 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=''

重啟網路生效

推薦使用重啟網路，不推薦使用 ip  link set down eth0  && ip link set up eth0 

重啟網路 
#systemctl restart network

重啟網絡卡，此方法會斷連
 ip  link set down eth0  && ip link set up eth0 

驗證

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

參考官方說明文件

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