Linux：nslookup和digparsing$ HOSTNAME，但ping不

在我们的专用networking中，我们有一个提供DNS接口（端口8600 ）的Consul服务发现服务器（ 10.241.232.14 ）。 我们希望设置我们的通用DNS服务器来将一些查询转发给Consul，以便将dockerized服务的主机名parsing为正在运行的物理服务器的名称。

所以我们在预装了dnsmasq的桌面上安装了Ubuntu 14.10。 我们在/etc/dnsmasq.d添加了一个文件，提供了Consul的私有DNS的信息（请注意，还有一些其他的系统DNS服务器是由DHCPconfiguration的：local dnsmasq实例也应该知道它们） ：

 $ cat /etc/dnsmasq.d/10-consul server=/service.search.km./10.241.232.14#8600 

在dnsmasq重新启动后， 我们可以使用dig ， nslookup或host等标准工具执行名称查找 ：

 $ host jenkins-deb-builder.service.search.km jenkins-deb-builder.service.search.km is an alias for mailtest-4.dev.search.km. $ nslookup jenkins-deb-builder.service.search.km Server: 127.0.0.1 Address: 127.0.0.1#53 jenkins-deb-builder.service.search.km canonical name = mailtest-4.dev.search.km. $ dig @localhost jenkins-deb-builder.service.search.km ; <<>> DiG 9.9.5-4.3ubuntu0.2-Ubuntu <<>> @localhost jenkins-deb-builder.service.search.km ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32618 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;jenkins-deb-builder.service.search.km. IN A ;; ANSWER SECTION: jenkins-deb-builder.service.search.km. 0 IN CNAME mailtest-4.dev.search.km. ;; Query time: 25 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Jun 23 19:49:45 MSK 2015 ;; MSG SIZE rcvd: 130 

但由于某种原因， 我们无法ping或连接到这个地址：

• 在named.conf中绑定UTF8
• 你是否需要在生产环境中运行Apache旁边的BIND（apache使用虚拟主机）？
• 限制YouTube内容的DNS
• 主机命令尝试几个服务器
• 有可能有相同的域路由到不同的服务器，而不使用子域？

 $ ping jenkins-deb-builder.service.search.km ping: unknown host jenkins-deb-builder.service.search.km $ curl http://jenkins-deb-builder.service.search.km:8082 curl: (6) Could not resolve host: jenkins-deb-builder.service.search.km 

这是我们的configuration：

 $ cat /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.0.1 search int.pv.km srv.pv.km dev.ix.km search.km ix.km srv.search.km $ cat /etc/nsswitch.conf # /etc/nsswitch.conf # # Example configuration of GNU Name Service Switch functionality. # If you have the `glibc-doc-reference' and `info' packages installed, try: # `info libc "Name Service Switch"' for information about this file. passwd: compat group: compat shadow: compat # hosts: files mdns4_minimal [NOTFOUND=return] dns hosts: files dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis 

我在这里看到过几个类似的问题，但是没有一个直接对应我们的问题。 任何帮助将不胜感激。

仅供参考：我注意到， ping写入描述符截断的主机名jenkins-deb-builder而不是jenkins-deb-builder.service.search.km …这里发生了什么事？

 $ strace ping jenkins-deb-builder.service.consul ... stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=239, ...}) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\364\25\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 52, MSG_NOSIGNAL, NULL, 0) = 52 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [127]) = 0 recvfrom(3, "\364\25\201\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 127 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\220P\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 62, MSG_NOSIGNAL, NULL, 0) = 62 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [112]) = 0 recvfrom(3, "\220P\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 112 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\354\274\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 62, MSG_NOSIGNAL, NULL, 0) = 62 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [118]) = 0 recvfrom(3, "\354\274\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 118 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\211\222\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 62, MSG_NOSIGNAL, NULL, 0) = 62 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [112]) = 0 recvfrom(3, "\211\222\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 112 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\2077\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 62, MSG_NOSIGNAL, NULL, 0) = 62 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [112]) = 0 recvfrom(3, "\2077\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 112 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "\257b\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 58, MSG_NOSIGNAL, NULL, 0) = 58 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [108]) = 0 recvfrom(3, "\257b\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 108 close(3) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3 connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 poll([{fd=3, events=POLLOUT}], 1, 0) = 1 ([{fd=3, revents=POLLOUT}]) sendto(3, "L5\1\0\0\1\0\0\0\0\0\0\23jenkins-deb-builder"..., 66, MSG_NOSIGNAL, NULL, 0) = 66 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) ioctl(3, FIONREAD, [116]) = 0 recvfrom(3, "L5\205\203\0\1\0\0\0\1\0\0\23jenkins-deb-builder"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 116 close(3) = 0 write(2, "ping: unknown host jenkins-deb-b"..., 54ping: unknown host jenkins-deb-builder.service.consul ) = 54 exit_group(2) 

 server=/search.km./10.241.232.14#8600