avahi 几分钟后停止发布

Question

我有几个虚拟机（运行 Scientific Linux 6.2）发布工作站记录，以便可以在网上轻松找到它们。一些虚拟机在几分钟后停止发布，即我可以通过 hostname.local 访问它们几分钟，然后任何发现都会超时。他们仍然可以通过他们的 IP 地址访问。重新启动会avahi-daemon导致相同的行为。

/var/log/messages 中没有任何内容表明存在问题：

Nov 27 08:07:33 vm01 avahi-daemon[2836]: Got SIGTERM, quitting.
Nov 27 08:07:33 vm01 avahi-daemon[2836]: Leaving mDNS multicast group on interface eth0.IPv4 with address 10.100.200.226.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Found user 'avahi' (UID 70) and group 'avahi' (GID 70).
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Successfully dropped root privileges.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: avahi-daemon 0.6.25 starting up.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: WARNING: No NSS support for mDNS detected, consider installing nss-mdns!
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Successfully called chroot().
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Successfully dropped remaining capabilities.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: No service file found in /etc/avahi/services.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.100.200.226.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: New relevant interface eth0.IPv4 for mDNS.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Network interface enumeration completed.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Registering new address record for fe80::216:3eff:fe73:df12 on eth0.*.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Registering new address record for 10.100.200.226 on eth0.IPv4.
Nov 27 08:07:33 vm01 avahi-daemon[2880]: Registering HINFO record with values 'X86_64'/'LINUX'.
Nov 27 08:07:34 vm01 avahi-daemon[2880]: Server startup complete. Host name is vm01.local. Local service cookie is 320168790.

日志中没有任何进一步表明存在问题的内容。启动期间的 SIGTERM 似乎是正常的，粗略的 google'ing 显示了这一点。

我只修改publish了配置部分中的条目；其他一切都保持原样：

[publish]
disable-publishing=no
disable-user-service-publishing=no
#add-service-cookie=no
publish-addresses=yes
#publish-hinfo=yes
publish-workstation=yes
#publish-domain=yes
#publish-dns-servers=192.168.50.1, 192.168.50.2
#publish-resolv-conf-dns-servers=yes
#publish-aaaa-on-ipv4=yes
#publish-a-on-ipv6=no

avahi-daemon 不会产生任何显着的 CPU 负载。进程正在运行：

# ps auxww |grep avahi
avahi     2880  0.0  0.0  27660  1488 ?        S    08:07   0:00 avahi-daemon: running [vm01.local]
avahi     2881  0.0  0.0  27660   520 ?        Ss   08:07   0:00 avahi-daemon: chroot helper

我有一些装有 CentOS 5.8 的虚拟机，它们没有这个问题。他们有 avahi-daemon 0.6.16 和相同的配置。有任何想法吗？

Answer 1

刚刚意识到我要回答一个非常古老的问题，但也许有人会发现这很有用。

查看您的网络设备，特别是任何托管交换机。我遇到了 IGMP 监听的问题，几分钟后客户端可能会突然停止接收多播请求，因为交换机将其过滤掉。

值得深思。