我在我的Virtualbox Debian机器上testing我的dnsmasq DHCP的configuration。 在生产中，我希望dnsmasq为通过qemu + libvirt + openvswitch运行的访客系统提供静态IP地址（我已经介绍了一个，它们通过docker运行，它们工作）
dnsmasqconfiguration：
# Tried both eth0 and br0 for an interface - more about it near bottom interface=br0 domain-needed bogus-priv no-resolv local=/mydomain.io/ no-poll no-hosts domain=mydomain.io dhcp-range=192.168.1.129,192.168.1.254,255.255.255.128,192.168.1.255,12h dhcp-option=3 log-queries log-dhcp Dockerfile：
FROM alpine:3.5 MAINTAINER [email protected] # webproc release settings ENV WEBPROC_VERSION 0.1.7 ENV WEBPROC_URL https://github.com/jpillora/webproc/releases/download/$WEBPROC_VERSION/webproc_linux_amd64.gz # fetch dnsmasq and webproc binary RUN apk update \ && apk add --no-cache dnsmasq \ && apk add --no-cache --virtual .build-deps curl \ && curl -sL $WEBPROC_URL | gzip -d - > /usr/local/bin/webproc \ && chmod +x /usr/local/bin/webproc \ && apk del .build-deps # configure dnsmasq run mkdir -p /etc/default/ RUN echo -e "ENABLED=1\nIGNORE_RESOLVCONF=yes" > /etc/default/dnsmasq # run! CMD ["webproc","--config","/etc/dnsmasq.conf","--","dnsmasq","--no-daemon","--dhcp-broadcast"]
构build和运行容器的命令：
docker build -t dnsmasq . docker run -d --name=dnsmasq --volume=/data/dnsmasq.conf:/etc/dnsmasq.conf -p 53:53/udp -p 192.168.56.101:5380:8080 --net host -e "USER=foo" -e "PASS=bar" dnsmasq
docker日志dnsmasq
[webproc] 2017/01/11 07:17:09 loaded config files changes from disk [webproc] 2017/01/11 07:17:09 agent listening on http://0.0.0.0:8080... dnsmasq: started, version 2.76 cachesize 150 dnsmasq: compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth no-DNSSEC loop-detect inotify dnsmasq-dhcp: DHCP, IP range 192.168.1.129 -- 192.168.1.254, lease time 12h dnsmasq: using local addresses only for domain mydomain.io dnsmasq: cleared cache dnsmasq-dhcp: no address range available for DHCP request via eth0 dnsmasq-dhcp: no address range available for DHCP request via eth0 dnsmasq-dhcp: no address range available for DHCP request via eth0
check_dhcp命令（来自monitoring-plugins-basic包）
/usr/lib/nagios/plugins/check_dhcp -v -s 192.168.1.129 -r 192.168.1.130 Requested server address: 192.168.1.129 DHCP socket: 3 Hardware address: 08:00:27:b6:c1:90 DHCPDISCOVER to 255.255.255.255 port 67 DHCPDISCOVER XID: 984913524 (0x3AB49674) DHCDISCOVER ciaddr: 0.0.0.0 DHCDISCOVER yiaddr: 0.0.0.0 DHCDISCOVER siaddr: 0.0.0.0 DHCDISCOVER giaddr: 0.0.0.0 send_dhcp_packet result: 548 recv_result_1: 548 recv_result_2: 548 receive_dhcp_packet() result: 548 receive_dhcp_packet() source: 10.0.2.2 Result=OK DHCPOFFER from IP address 10.0.2.2 via 10.0.2.2 DHCPOFFER XID: 984913524 (0x3AB49674) DHCPOFFER chaddr: 080027B6C190 DHCPOFFER ciaddr: 0.0.0.0 DHCPOFFER yiaddr: 10.0.2.15 DHCPOFFER siaddr: 10.0.2.4 DHCPOFFER giaddr: 0.0.0.0 Option: 53 (0x01) Option: 1 (0x04) Option: 3 (0x04) Option: 6 (0x08) Option: 15 (0x04) Option: 51 (0x04) Option: 54 (0x04) Lease Time: 86400 seconds Renewal Time: 0 seconds Rebinding Time: 0 seconds Added offer from server @ 10.0.2.2 of IP address 10.0.2.15 No (more) data received (nfound: 0) Result=ERROR Total responses seen on the wire: 1 Valid responses for this machine: 1 CRITICAL: Received 1 DHCPOFFER(s), 0 of 1 requested servers responded, requested address (192.168.1.130) was not offered, max lease time = 86400 sec.
在check_dhcp命令之后，当使用interface = br0连接到br0时 ，我甚至没有得到
dnsmasq-dhcp: no address range available for DHCP request via eth0
…在日志中。 相反，当dnsmasq连接到eth0它就像我的dnsmasq被忽略，我得到了dockerdhcp服务器的响应。
最后但并非最不重要的我的路线-n
0.0.0.0 10.0.2.2 0.0.0.0 UG 0 0 0 eth0 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 192.168.1.128 0.0.0.0 255.255.255.128 U 0 0 0 br0 192.168.56.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
〜谢谢你的帮助，非常感谢