我的DNS定期下降。
named[1482]: shutting down named[1482]: stopping command channel on 127.0.0.1#953 named[1482]: stopping command channel on ::1#953 named[1482]: no longer listening on 127.0.0.1#53 named[1482]: no longer listening on xx.xx.179.58#53 named[1482]: no longer listening on xx.xx.134.252#53 named[1482]: no longer listening on xx.xx.196.243#53 named[1482]: exiting 每分钟一次的看门狗检查服务
watchdog[5802]: Checking Cron watchdog[5802]: Checking SMTP watchdog[5802]: Checking DNS watchdog[5802]: DNS done (ERR) watchdog[5802]: Checking HTTP watchdog[5802]: Checking POP3 watchdog[5802]: Checking MySQL
重新启动DNS
watchdog[5802]: Restarting DNS named[5829]: bla bla bla... watchdog[5802]: Checking DNS watchdog[5802]: DNS done (OK)
2秒后
named[1482]: shutting down named[1482]: stopping command channel on 127.0.0.1#953 named[1482]: stopping command channel on ::1#953 named[1482]: no longer listening on 127.0.0.1#53 named[1482]: no longer listening on xx.xx.179.58#53 named[1482]: no longer listening on xx.xx.134.252#53 named[1482]: no longer listening on xx.xx.196.243#53 named[1482]: exiting
看门狗重启，等等…
几个循环后，我的VPSclosures…我必须重新启动它。
我有3-5天这样的问题。
dmseg是空的。
“消息”日志文件中没有其他信息。 这里是命名的重启日志：
watchdog[5802]: Restarting DNS Jun 14 14:46:11 named[5829]: starting BIND 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.2 -u named Jun 14 14:46:11 named[5829]: built with '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-libtool' '--localstatedir=/var' '--enable-threads' '--enable-ipv6' '--with-pic' '--disable-static' '--disable-openssl-version-check' '--with-dlz-ldap=yes' '--with-dlz-postgres=yes' '--with-dlz-mysql=yes' '--with-dlz-filesystem=yes' '--with-gssapi=yes' '--disable-isc-spnego' '--with-docbook-xsl=/usr/share/sgml/docbook/xsl-stylesheets' '--enable-fixed-rrset' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'target_alias=x86_64-redhat-linux-gnu' 'CFLAGS= -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' 'CPPFLAGS= -DDIG_SIGCHASE' Jun 14 14:46:11 named[5829]: ---------------------------------------------------- Jun 14 14:46:11 named[5829]: BIND 9 is maintained by Internet Systems Consortium, Jun 14 14:46:11 named[5829]: Inc. (ISC), a non-profit 501(c)(3) public-benefit Jun 14 14:46:11 named[5829]: corporation. Support and training for BIND 9 are Jun 14 14:46:11 named[5829]: available at https://www.isc.org/support Jun 14 14:46:11 named[5829]: ---------------------------------------------------- Jun 14 14:46:11 named[5829]: adjusted limit on open files from 1024 to 1048576 Jun 14 14:46:11 named[5829]: found 8 CPUs, using 8 worker threads Jun 14 14:46:11 named[5829]: using up to 4096 sockets Jun 14 14:46:11 named[5829]: loading configuration from '/etc/named.conf' Jun 14 14:46:11 named[5829]: reading built-in trusted keys from file '/etc/named.iscdlv.key' Jun 14 14:46:11 named[5829]: using default UDP/IPv4 port range: [1024, 65535] Jun 14 14:46:11 named[5829]: using default UDP/IPv6 port range: [1024, 65535] Jun 14 14:46:11 named[5829]: listening on IPv4 interface lo, 127.0.0.1#53 Jun 14 14:46:11 named[5829]: listening on IPv4 interface lo:1, xx.xx.179.58#53 Jun 14 14:46:11 named[5829]: listening on IPv4 interface lo:2, xx.xx.134.252#53 Jun 14 14:46:11 named[5829]: listening on IPv4 interface eth0, xx.xx.196.243#53 Jun 14 14:46:11 named[5829]: generating session key for dynamic DNS Jun 14 14:46:11 named[5829]: sizing zone task pool based on 57 zones Jun 14 14:46:11 named[5829]: using built-in DLV key for view _default Jun 14 14:46:11 named[5829]: set up managed keys zone for view _default, file '/var/named/dynamic/managed-keys.bind' Jun 14 14:46:11 named[5829]: Warning: 'empty-zones-enable/disable-empty-zone' not set: disabling RFC 1918 empty zones Jun 14 14:46:11 named[5829]: automatic empty zone: 127.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 254.169.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 2.0.192.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 100.51.198.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 113.0.203.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 255.255.255.255.IN-ADDR.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: DFIP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 8.EFIP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 9.EFIP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: AEFIP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: BEFIP6.ARPA Jun 14 14:46:11 named[5829]: automatic empty zone: 8.BD0.1.0.0.2.IP6.ARPA Jun 14 14:46:11 named[5829]: command channel listening on 127.0.0.1#953 Jun 14 14:46:11 named[5829]: command channel listening on ::1#953 Jun 14 14:46:11 named[5829]: zone 0.in-addr.arpa/IN: loaded serial 0 Jun 14 14:46:11 named[5829]: zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0 Jun 14 14:46:11 named[5829]: zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0 Jun 14 14:46:11 named[5829]: zone xxxxxx.com/IN: loaded serial 2013050600 Jun 14 14:46:11 named[5829]: zone localhost.localdomain/IN: loaded serial 0 Jun 14 14:46:11 named[5829]: zone localhost/IN: loaded serial 0 Jun 14 14:46:11 named[5829]: zone xxxxxx.net/IN: loaded serial 2013041201 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040200 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050801 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040200 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013060401 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050300 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040201 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013032584 Jun 14 14:46:11 named[5829]: zone isp.xxxxxx.ru/IN: loaded serial 2013032501 Jun 14 14:46:11 named[5829]: zone webmail.xxxxxx.ru/IN: loaded serial 2013032902 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040209 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013051001 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013051001 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050600 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013060401 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013060401 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050600 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050701 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013060401 Jun 14 14:46:11 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013060401 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050701 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050700 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040500 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040900 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050700 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050801 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050801 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013050801 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013041500 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013053101 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013051001 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.su/IN: loaded serial 2013040401 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040900 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: loaded serial 2013040400 Jun 14 14:46:12 named[5829]: managed-keys-zone ./IN: loaded serial 4011 Jun 14 14:46:12 named[5829]: running Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone webmail.xxxxxx.ru/IN: sending notifies (serial 2013032902) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013051001) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040200) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013032584) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.com/IN: sending notifies (serial 2013050600) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013060401) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.net/IN: sending notifies (serial 2013041201) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040201) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040200) Jun 14 14:46:12 named[5829]: zone isp.xxxxxx.ru/IN: sending notifies (serial 2013032501) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040209) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040900) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050701) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013051001) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013060401) Jun 14 14:46:12 named[5829]: zone xxxxxx.su/IN: sending notifies (serial 2013040401) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050700) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050701) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050700) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013051001) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013060401) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040900) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050300) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050801) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013053101) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050600) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050801) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040400) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050801) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013060401) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013040500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013041500) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050600) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013050801) Jun 14 14:46:12 named[5829]: zone xxxxxx.ru/IN: sending notifies (serial 2013060401) Jun 14 14:46:22 watchdog[5802]: Checking DNS Jun 14 14:46:22 watchdog[5802]: DNS done (OK) Jun 14 14:46:27 named[5829]: shutting down ...
命名（BIND？）正在干净地停止，表示停止了它。 可能这可能是某人input命令或cronjob阻止它，但它也可能是看门狗错误地认为它是closures并重新启动它。