Networking
Centos 6.8 VM 客戶端未從 Rasbian dnsmasq 伺服器獲取 DHCP 保留 IP
我有一個 CentOS VM 客戶端，它應該從我的 Rasbian dnsmasq 伺服器獲取保留 IP，但是客戶端只會一遍又一遍地提取相同的動態租約，而不是我為其配置的 IP。
完整設置如下：
- CentOS 6.8 KVM 主機 (Dell R710)
- CentOS 6.8 虛擬機
- Raspberry Pi 執行最新的 Pixel(?) 版本
Pi 為我的 LAN 中的三個子網託管 dnsmasq 伺服器，192.168.0.0（家庭）、192.168.1.0（實驗室）、192.168.2.0（Wifi）一切正常，我注意到的 DHCP 或 DNS 沒有問題。
CentOS KVM 主機有一個保留的 DHCP 地址，可以正常工作。一個新的 CentOS VM（最小映像，Plex）有一個保留的 DHCP 地址，它拒絕使用。
我嘗試通過以下方式保留 IP：
dhcp-host=MACADDRESS,IPADDRESS或者
dhcp-host=MACADDRESS,IPADDRESS,HOSTNAME.DOM.AIN並且還通過指定 dhcp-hostsfile 並將相同的資訊放入其中。
我已經從 dnsmasq 伺服器的 /var/lib/misc/dnsmasq.leases 中刪除了有問題的動態租約
我已經刪除了 VM 客戶端的 /etc/dhcp/dhclient-eth0.conf 和 /var/lib/dhclient/dhclient.leases 和 dhclient-eth0.leases
我跑步的每一步
dhclient -r eth0;ifdown eth0;ifup eth0或一些類似的組合
哦，我已經兩次和三次檢查了沒有未完成的租約具有相同的 IP 地址，沒有其他設備竊取了該 IP，並且具有該 IP 的原始電腦是一個當機 Windows VM
這是執行 dhclient -r;dhclient 時來自 dnsmasq 伺服器的日誌文件條目範例
Feb 7 16:42:55 dnsmasq-dhcp[660]: 2347579967 available DHCP range: 192.168.1.100 -- 192.168.1.200 Feb 7 16:42:55 dnsmasq-dhcp[660]: 2347579967 DHCPRELEASE(eth0.2) 192.168.1.192 52:54:00:1c:26:66 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 available DHCP range: 192.168.1.100 -- 192.168.1.200 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 DHCPDISCOVER(eth0.2) 192.168.1.192 52:54:00:1c:26:66 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 tags: tag2, eth0.2 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 DHCPOFFER(eth0.2) 192.168.1.192 52:54:00:1c:26:66 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 15:domain-name, 6:dns-server, 12:hostname, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 26:mtu, 119:domain-search, 3:router Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 next server: 192.168.1.250 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 1 option: 53 message-type 2 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 54 server-identifier 192.168.1.250 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 51 lease-time 7h Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 58 T1 3h30m Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 59 T2 6h7m30s Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 1 netmask 255.255.255.0 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 28 broadcast 192.168.1.255 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 18 option: 15 domain-name ############.com Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 12 option: 6 dns-server 192.168.1.250, 8.8.8.8, 192.168.1.1 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 3 router 192.168.1.1 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 available DHCP range: 192.168.1.100 -- 192.168.1.200 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 DHCPREQUEST(eth0.2) 192.168.1.192 52:54:00:1c:26:66 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 tags: tag2, eth0.2 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 DHCPACK(eth0.2) 192.168.1.192 52:54:00:1c:26:66 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 15:domain-name, 6:dns-server, 12:hostname, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server, Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 requested options: 26:mtu, 119:domain-search, 3:router Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 next server: 192.168.1.250 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 1 option: 53 message-type 5 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 54 server-identifier 192.168.1.250 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 51 lease-time 7h Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 58 T1 3h30m Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 59 T2 6h7m30s Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 1 netmask 255.255.255.0 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 28 broadcast 192.168.1.255 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 18 option: 15 domain-name #############.com Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 12 option: 6 dns-server 192.168.1.250, 8.8.8.8, 192.168.1.1 Feb 7 16:42:55 dnsmasq-dhcp[660]: 171708215 sent size: 4 option: 3 router 192.168.1.1（接收的正確 IP 地址為 192.168.2.9）
還有我的 dnsmasq.conf 文件：
dhcp-authoritative log-queries log-dhcp log-facility = /var/log/dns-log.log # Never forward plain names (without a dot or domain part) domain-needed # Never forward addresses in the non-routed address spaces. bogus-priv # If you don't want dnsmasq to read /etc/resolv.conf or any other # file, getting its servers from this file instead (see below), then # uncomment this. #no-resolv # If you don't want dnsmasq to poll /etc/resolv.conf or other resolv # files for changes and re-read them then uncomment this. #no-poll # Add local-only domains here, queries in these domains are answered # from /etc/hosts or DHCP only. local=/############.com/ #server=/###########.com/192.168.0.250 ###### External DNS server=ISP#DNS#SERVER server=8.8.8.8 #################################interfaces to bind, vlan style interface=eth0.1 interface=eth0.2 interface=eth0.3 # If you don't want dnsmasq to read /etc/hosts, uncomment the # following line. #no-hosts # or if you want it to read another file, as well as /etc/hosts, use # this. #addn-hosts=/etc/dnsmasq-static.conf # Set this (and domain: see below) if you want to have a domain # automatically added to simple names in a hosts-file. expand-hosts # Set the domain for dnsmasq. this is optional, but if it is set, it # does the following things. # 1) Allows DHCP hosts to have fully qualified domain names, as long # as the domain part matches this setting. # 2) Sets the "domain" DHCP option thereby potentially setting the # domain of all systems configured by DHCP # 3) Provides the domain part for "expand-hosts" domain=##########.com # Uncomment this to enable the integrated DHCP server, you need # to supply the range of addresses available for lease and optionally # a lease time. If you have more than one network, you will need to # repeat this for each network on which you want to supply DHCP # service. ############################################################################################################ dhcp-range=set:tag1,192.168.0.100,192.168.0.200,255.255.255.0,7h dhcp-range=set:tag2,192.168.1.100,192.168.1.200,255.255.255.0,7h dhcp-range=set:tag3,192.168.2.100,192.168.2.200,255.255.255.0,7h ####################################### # Always set the name of the host with hardware address # 11:22:33:44:55:66 to be "fred" #FIRST TRY SETTING RESERVATION, THEN MOVED TO STATIC FILE #dhcp-host=52:54:00:1C:26:66,192.168.2.9 dhcp-hostsfile=/etc/dns-static.conf # If this line is uncommented, dnsmasq will read /etc/ethers and act # on the ethernet-address/IP pairs found there just as if they had # been given as --dhcp-host options. Useful if you keep # MAC-address/host mappings there for other purposes. #read-ethers ####################################################################################DEFAULT ROUTES dhcp-option=tag:tag1,option:router,192.168.0.1 dhcp-option=tag:tag2,option:router,192.168.1.1 dhcp-option=tag:tag3,option:router,192.168.2.1 dhcp-option=tag:tag1,option:dns-server,192.168.0.250,8.8.8.8,192.168.0.1 dhcp-option=tag:tag2,option:dns-server,192.168.1.250,8.8.8.8,192.168.1.1 dhcp-option=tag:tag3,option:dns-server,192.168.2.250,8.8.8.8,192.168.2.1
原來是我的一個 VLAN 錯誤。
我最終在第二個乙太網埠上創建了第二個網橋介面，將其標記到 192.168.2.0 VLAN，將 VM 更改為使用新網橋，然後噗