Category: Service (服务)

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[步骤] dnsmasq 的搭建 （DNS 服务）

步骤一：安装 dnsmasq

# yum install dnsmasq

步骤二：添加 DNS 配置

# vi /etc/dnsmasq.d/address.conf

创建以下内容：

all-servers
server=1.1.1.1
server=8.8.8.8

server=/cn/114.114.114.114

address=/test-gateway.com/192.168.100.1

host-record=gateway.com,192.168.100.1

（
补充：
1) 这里的 all-servers 代表同时解析下面所有的 DNS 记录
2) 这里的 server=1.1.1.1 和 server=8.8.8.8 代表上游 DNS 服务器使用 1.1.1.1 和 8.8.8.8
3) 这里的 server=/cn/114.114.114.114 代表以 cn 结尾的域名上游 DNS 使用 114.114.114.114
4) 这里的 address=/test-gateway.com/192.168.100.1 代表所有以 test-gateway.com 结尾的域名 （例如 one.test-gateway.com） 指向 IP 地址 192.168.100.1
5) 这里的 host-record=gateway.com,192.168.100.1 代表 gateway.com 域名指向 IP 地址 192.168.100.1
）

步骤三：重启 dnsmasq 服务

3.1 重启 dnsmasq 服务

# systemctl restart dnsmasq.service

3.2 查看 dnsmasq 服务状态

# systemctl status dnsmasq.service
● dnsmasq.service - DNS caching server.
   Loaded: loaded (/usr/lib/systemd/system/dnsmasq.service; disabled; vendor preset: disabled)
   Active: active (running) since Thu 2025-08-14 00:00:35 CST; 7s ago
 Main PID: 10412 (dnsmasq)
    Tasks: 1 (limit: 5781)
   Memory: 704.0K
   CGroup: /system.slice/dnsmasq.service
           └─10412 /usr/sbin/dnsmasq -k

Aug 14 00:00:35 tool1 dnsmasq[10412]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN2 DHCP>
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 114.114.114.114#53 for domain cn
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 8.8.8.8#53
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 1.1.1.1#53
Aug 14 00:00:35 tool1 dnsmasq[10412]: reading /etc/resolv.conf
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 114.114.114.114#53 for domain cn
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 8.8.8.8#53
Aug 14 00:00:35 tool1 dnsmasq[10412]: using nameserver 1.1.1.1#53
Aug 14 00:00:35 tool1 dnsmasq[10412]: ignoring nameserver 192.168.100.11 - local interface
Aug 14 00:00:35 tool1 dnsmasq[10412]: read /etc/hosts - 2 addresses

步骤四：使用配置好的 dnsmasq 服务

# vi /etc/resolv.conf

将全部内容修改如下：

nameserver 192.168.100.11

（补充：这里的 192.168.100.11 指的是刚刚搭建 dnsmasq 服务的服务器的 IP 地址）

步骤五：测试 dnsmasq 服务

5.1 测试 DNS 正向解析

# nslookup test-gateway.com
Server:		192.168.100.11
Address:	192.168.100.11#53

Name:	test-gateway.com
Address: 192.168.100.1

（补充：这里以正向解析刚刚配置的域名 test-gateway.com 为例）

5.2 测试 DNS 反向解析

# arp 192.168.100.1
Address                  HWtype  HWaddress           Flags Mask            Iface
_gateway                 ether   52:54:00:ef:3a:4d   C                     eth0

（补充：这里以反向解析刚刚配置的 IP 地址 192.168.100.1 为例）

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[DEBUG] Red Hat Satellite resolve remove repository error ‘Unable to find content with the ID XXX’

Error Code:

Katello::Errors::CandlepinError: Unable to find content with the ID XXX

Solution One: Add Relevant Licenses

Solution One Step One: Make sure which repository is marked as Orphaned

Access Satellite Web –> Content –> Sync Status –> Find the Orphaned repository

Solution One Step Two: Add Relevant Licenses

(Omit Steps)

Solution Two: Remove Orphaned Repositories

Solution Two Step One: Make sure which repository is marked as Orphaned

Access Satellite Web –> Content –> Sync Status –> Find the Orphaned repository

Solution Two Step Two: Remove Orphaned Repositories

Access Satellite Web –> Content –> Red Hat Repositories –> Remove Orphaned Repositories

Solution Two Step Three: Resume Removing Orphaned Repositories Task Status (If Removing Orphaned Repositories Task is Stuck)

3.1 Access the concerned task

Access Satellite Web –> Monitor –> Tasks –> Search for the concerned task

3.2 Check both the Run and Finalize tabs for the sub-task

Click on the DynFlow Console button and check both the Run and Finalize tabs for the sub-task

3.3 Skip the ERROR sub-task

(Omit Steps)

(Add: usually it’s the Actions::Candlepin::Environment::SetContent one )

3.4 Resume Removing Orphaned Repositories Task Status

(Omit Steps)

Reference:

https://access.redhat.com/solutions/6654081