我一直在创建和销毁虚拟机,以便测试各种服务或应用程序,因此我想使用avahi通过他们的名字连接到它们,所以我不必在脑海中使用宝贵的空间对于明天可能会消失的动态IP地址.这似乎并不总是奏效.
我目前有两个CentOS 6.3虚拟机,都运行avahi-daemon,但其中一个名称无法访问.
问题机器：
error@underground ~ $ssh nagios.local ssh: Could not resolve hostname nagios.local: Name or service not known
工作机器：
error@underground ~ $ssh puppet.local error@puppet.local's password:
然而我可以在网络上看到它:(地下是我正在工作的主机)
error@underground ~ $avahi-browse -at + br0 IPv4 puppet SSH Remote Terminal local + br0 IPv4 nagios SSH Remote Terminal local + br0 IPv4 puppet [52:54:00:d0:31:c7] Workstation local + br0 IPv4 nagios [52:54:00:93:ec:af] Workstation local + br0 IPv4 underground [6c:62:6d:d1:df:ad] Workstation local + virbr0 IPv4 underground [52:54:00:8e:60:30] Workstation local
根据反馈,getent主机的输出：
error@underground ~ $getent hosts nagios.local error@underground ~ $getent hosts puppet.local 192.168.12.146 puppet.local
在nagios.local上,无法访问的虚拟机,avahi-daemon(显然)安装并运行,我在防火墙上打了一个正确的洞：
pkts bytes target prot opt in out source destination 74 15950 ACCEPT udp -- * * 0.0.0.0/0 224.0.0.251 state NEW udp dpt:5353
nagios.local上的Syslog让我完全不知道可能会发生什么：
Jul 18 04:24:18 nagios avahi-daemon[1384]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.12.132. Jul 18 04:24:18 nagios avahi-daemon[1476]: Found user 'avahi' (UID 70) and group 'avahi' (GID 70). Jul 18 04:24:18 nagios avahi-daemon[1476]: Successfully dropped root privileges. Jul 18 04:24:18 nagios avahi-daemon[1476]: avahi-daemon 0.6.25 starting up. Jul 18 04:24:18 nagios avahi-daemon[1476]: WARNING: No NSS support for mDNS detected,consider installing nss-mdns! Jul 18 04:24:18 nagios avahi-daemon[1476]: Successfully called chroot(). Jul 18 04:24:18 nagios avahi-daemon[1476]: Successfully dropped remaining capabilities. Jul 18 04:24:18 nagios avahi-daemon[1476]: Loading service file /services/ssh.service. Jul 18 04:24:18 nagios avahi-daemon[1476]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.12.132. Jul 18 04:24:18 nagios avahi-daemon[1476]: New relevant interface eth0.IPv4 for mDNS. Jul 18 04:24:18 nagios avahi-daemon[1476]: Network interface enumeration completed. Jul 18 04:24:18 nagios avahi-daemon[1476]: Registering new address record for 2001:db8:1600:80bf:5054:ff:fe93:ecaf on eth0.*. Jul 18 04:24:18 nagios avahi-daemon[1476]: Registering new address record for 192.168.12.132 on eth0.IPv4. Jul 18 04:24:18 nagios avahi-daemon[1476]: Registering HINFO record with values 'X86_64'/'LINUX'. Jul 18 04:24:19 nagios avahi-daemon[1476]: Server startup complete. Host name is nagios.local. Local service cookie is 3129794608. Jul 18 04:24:19 nagios avahi-daemon[1476]: Service "nagios" (/services/ssh.service) successfully established.
这两个安装之间的主要区别在于puppet.local是作为“桌面”安装安装的,而nagios.local是作为“最小”安装安装的,并且稍后安装了各种与avahi相关的软件包.
我无法弄清楚为什么我无法解析这台机器的名字.我错过了什么完全显而易见的事情？
更新：根据mgorven的建议,我再次检查了主机,发现它没有安装nss-mdns.所以我安装了它,现在问题完全颠倒了！从主持人看：
error@underground ~ $getent hosts puppet.local error@underground ~ $getent hosts nagios.local 192.168.12.132 nagios.local
