Недавно мой веб-сервер не может быть доступен. Он выдает мне The connection has timed out. Сервер по адресу IP_ADDRESS слишком долго отвечает.
Перезагрузка сервера решила проблему. Но проблема появляется каждый день.
На сервере установлена ОС Ubuntu 12.04 с Apache/2.2.22, а для контента я использую Wordpress.
Когда возникла проблема, я пробовал перезапустить службу apache2, но ничего не помогло. Когда я проверяю журнал с помощью tail -f и пытаюсь открыть веб-страницу, обновленного журнала нет. Я пробовал, я пробовал telnet IP_ADDRESS http с клиента, подключиться не удалось. После перезагрузки все прошло успешно.
Я до сих пор не знаю, в чем причина этой проблемы. Пожалуйста, помогите мне.
Ниже приведено то, что я запечатлел, когда проблема возникла 7 октября.
кот /proc/meminfo
MemTotal: 4047288 kB
MemFree: 3397704 kB
Buffers: 57232 kB
Cached: 391364 kB
SwapCached: 0 kB
Active: 394736 kB
Inactive: 153000 kB
Active(anon): 99180 kB
Inactive(anon): 300 kB
Active(file): 295556 kB
Inactive(file): 152700 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 4191228 kB
SwapFree: 4191228 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 99136 kB
Mapped: 21556 kB
Shmem: 344 kB
Slab: 52572 kB
SReclaimable: 37588 kB
SUnreclaim: 14984 kB
KernelStack: 1104 kB
PageTables: 4020 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6214872 kB
Committed_AS: 542004 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 142668 kB
VmallocChunk: 34359569356 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 63424 kB
DirectMap2M: 4130816 kB
netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN
tcp 0 0 IPADDRESS:53 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN
tcp6 0 0 :::21 :::* LISTEN
tcp6 0 0 :::53 :::* LISTEN
tcp6 0 0 :::22 :::* LISTEN
tcp6 0 0 ::1:953 :::* LISTEN
udp 0 0 0.0.0.0:10000 0.0.0.0:*
udp 0 0 IPADDRESS:53 0.0.0.0:*
udp 0 0 127.0.0.1:53 0.0.0.0:*
udp6 0 0 :::53 :::*
системный журнал
Oct 7 07:09:01 web CRON[8762]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)
Oct 7 07:17:01 web CRON[8816]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Oct 7 07:39:01 web CRON[8914]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)
Oct 7 08:09:01 web CRON[9062]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)
Oct 7 08:17:01 web CRON[9116]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Oct 7 08:39:01 web CRON[9214]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)
Oct 7 08:49:20 web named[896]: error (network unreachable) resolving './DNSKEY/IN': 2001:500:2f::f#53
Oct 7 08:49:20 web named[896]: error (network unreachable) resolving './NS/IN': 2001:500:2f::f#53
Oct 7 09:09:01 web CRON[9880]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)
пс aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 24344 2280 ? Ss Oct06 0:01 /sbin/init
root 2 0.0 0.0 0 0 ? S Oct06 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S Oct06 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S Oct06 0:00 [kworker/0:0]
root 5 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/0:0H]
root 7 0.0 0.0 0 0 ? S Oct06 0:00 [migration/0]
root 8 0.0 0.0 0 0 ? S Oct06 0:00 [rcu_bh]
root 9 0.0 0.0 0 0 ? S Oct06 0:00 [rcuob/0]
root 10 0.0 0.0 0 0 ? S Oct06 0:00 [rcuob/1]
root 11 0.0 0.0 0 0 ? S Oct06 0:00 [rcuob/2]
root 12 0.0 0.0 0 0 ? S Oct06 0:00 [rcuob/3]
root 13 0.0 0.0 0 0 ? S Oct06 0:02 [rcu_sched]
root 14 0.0 0.0 0 0 ? S Oct06 0:01 [rcuos/0]
root 15 0.0 0.0 0 0 ? S Oct06 0:02 [rcuos/1]
root 16 0.0 0.0 0 0 ? S Oct06 0:00 [rcuos/2]
root 17 0.0 0.0 0 0 ? S Oct06 0:00 [rcuos/3]
root 18 0.0 0.0 0 0 ? S Oct06 0:00 [watchdog/0]
root 19 0.0 0.0 0 0 ? S Oct06 0:00 [watchdog/1]
root 20 0.0 0.0 0 0 ? S Oct06 0:00 [migration/1]
root 21 0.0 0.0 0 0 ? S Oct06 0:00 [ksoftirqd/1]
root 22 0.0 0.0 0 0 ? S Oct06 0:00 [kworker/1:0]
root 23 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/1:0H]
root 24 0.0 0.0 0 0 ? S Oct06 0:00 [watchdog/2]
root 25 0.0 0.0 0 0 ? S Oct06 0:00 [migration/2]
root 26 0.0 0.0 0 0 ? S Oct06 0:00 [ksoftirqd/2]
root 27 0.0 0.0 0 0 ? S Oct06 0:00 [kworker/2:0]
root 28 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/2:0H]
root 29 0.0 0.0 0 0 ? S Oct06 0:00 [watchdog/3]
root 30 0.0 0.0 0 0 ? S Oct06 0:00 [migration/3]
root 31 0.0 0.0 0 0 ? S Oct06 0:00 [ksoftirqd/3]
root 33 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/3:0H]
root 34 0.0 0.0 0 0 ? S< Oct06 0:00 [khelper]
root 35 0.0 0.0 0 0 ? S Oct06 0:00 [kdevtmpfs]
root 36 0.0 0.0 0 0 ? S< Oct06 0:00 [netns]
root 37 0.0 0.0 0 0 ? S< Oct06 0:00 [writeback]
root 38 0.0 0.0 0 0 ? S< Oct06 0:00 [kintegrityd]
root 39 0.0 0.0 0 0 ? S< Oct06 0:00 [bioset]
root 40 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/u9:0]
root 41 0.0 0.0 0 0 ? S< Oct06 0:00 [kblockd]
root 42 0.0 0.0 0 0 ? S< Oct06 0:00 [ata_sff]
root 43 0.0 0.0 0 0 ? S Oct06 0:00 [khubd]
root 44 0.0 0.0 0 0 ? S< Oct06 0:00 [md]
root 45 0.0 0.0 0 0 ? S< Oct06 0:00 [devfreq_wq]
root 46 0.0 0.0 0 0 ? S Oct06 0:35 [kworker/0:1]
root 48 0.0 0.0 0 0 ? S Oct06 0:00 [khungtaskd]
root 49 0.0 0.0 0 0 ? S Oct06 0:00 [kswapd0]
root 50 0.0 0.0 0 0 ? SN Oct06 0:00 [ksmd]
root 51 0.0 0.0 0 0 ? SN Oct06 0:00 [khugepaged]
root 52 0.0 0.0 0 0 ? S Oct06 0:00 [fsnotify_mark]
root 53 0.0 0.0 0 0 ? S Oct06 0:00 [ecryptfs-kthrea]
root 54 0.0 0.0 0 0 ? S< Oct06 0:00 [crypto]
root 66 0.0 0.0 0 0 ? S< Oct06 0:00 [kthrotld]
root 67 0.0 0.0 0 0 ? S Oct06 0:00 [kworker/2:1]
root 69 0.0 0.0 0 0 ? S Oct06 0:02 [kworker/3:1]
root 70 0.0 0.0 0 0 ? S Oct06 0:00 [scsi_eh_0]
root 71 0.0 0.0 0 0 ? S Oct06 0:00 [scsi_eh_1]
root 73 0.0 0.0 0 0 ? S< Oct06 0:00 [dm_bufio_cache]
root 93 0.0 0.0 0 0 ? S< Oct06 0:00 [deferwq]
root 94 0.0 0.0 0 0 ? S< Oct06 0:00 [charger_manager]
root 95 0.0 0.0 0 0 ? S Oct06 0:01 [kworker/1:1]
root 208 0.0 0.0 0 0 ? S< Oct06 0:00 [mpt_poll_0]
root 209 0.0 0.0 0 0 ? S< Oct06 0:00 [mpt/0]
root 250 0.0 0.0 0 0 ? S Oct06 0:00 [scsi_eh_2]
root 263 0.0 0.0 0 0 ? S Oct06 0:00 [jbd2/sda1-8]
root 264 0.0 0.0 0 0 ? S< Oct06 0:00 [ext4-rsv-conver]
root 265 0.0 0.0 0 0 ? S< Oct06 0:00 [ext4-unrsv-conv]
root 377 0.0 0.0 17372 636 ? S Oct06 0:00 upstart-udev-bridge --daemon
root 404 0.0 0.0 21660 1432 ? Ss Oct06 0:00 /sbin/udevd --daemon
103 416 0.0 0.0 23928 992 ? Ss Oct06 0:00 dbus-daemon --system --fork --activation=upstart
syslog 420 0.0 0.0 249476 1552 ? Sl Oct06 0:00 rsyslogd -c5
root 483 0.0 0.0 21604 848 ? S Oct06 0:00 /sbin/udevd --daemon
root 484 0.0 0.0 21604 848 ? S Oct06 0:00 /sbin/udevd --daemon
root 565 0.0 0.0 0 0 ? S< Oct06 0:00 [kpsmoused]
root 570 0.0 0.0 0 0 ? S Oct06 0:00 [kworker/3:2]
root 580 0.0 0.0 0 0 ? S< Oct06 0:00 [ttm_swap]
root 639 0.0 0.0 15196 400 ? S Oct06 0:00 upstart-socket-bridge --daemon
root 720 0.0 0.0 50040 2924 ? Ss Oct06 0:00 /usr/sbin/sshd -D
root 803 0.0 0.0 15792 976 tty4 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty4
root 816 0.0 0.0 15792 972 tty5 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty5
root 827 0.0 0.0 15792 968 tty2 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty2
root 828 0.0 0.0 15792 972 tty3 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty3
root 831 0.0 0.0 15792 976 tty6 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty6
root 834 0.0 0.0 4336 712 ? Ss Oct06 0:00 acpid -c /etc/acpi/events -s /var/run/acpid.socket
root 840 0.0 0.0 19120 1044 ? Ss Oct06 0:00 cron
daemon 841 0.0 0.0 16916 372 ? Ss Oct06 0:00 atd
bind 896 0.0 0.3 384688 15180 ? Ssl Oct06 0:00 /usr/sbin/named -u bind
root 908 0.0 0.0 15988 696 ? Ss Oct06 0:08 /usr/sbin/irqbalance
mysql 1011 0.0 1.3 1083280 55392 ? Ssl Oct06 0:20 /usr/sbin/mysqld
whoopsie 1016 0.0 0.1 187668 4080 ? Ssl Oct06 0:00 whoopsie
root 1039 0.0 0.1 93804 4692 ? S Oct06 1:02 /usr/sbin/vmtoolsd
proftpd 1076 0.0 0.0 94700 2148 ? Ss Oct06 0:00 proftpd: (accepting connections)
root 1373 0.0 0.5 87952 22660 ? Ss Oct06 0:02 /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
root 1376 0.0 0.0 15792 972 tty1 Ss+ Oct06 0:00 /sbin/getty -8 38400 tty1
root 1420 0.0 0.0 0 0 ? S< Oct06 0:00 [kworker/u9:1]
root 8889 0.0 0.0 0 0 ? S 07:32 0:00 [kworker/u8:0]
root 9267 0.0 0.0 73444 3672 ? Rs 08:51 0:00 sshd: root@pts/0
root 9434 0.0 0.1 22840 4152 pts/0 Ss 08:51 0:00 -bash
root 9517 0.0 0.0 0 0 ? S 08:53 0:00 [kworker/u8:2]
root 9942 0.0 0.2 195700 8696 ? Ss 09:12 0:00 /usr/sbin/apache2 -k start
www-data 9947 0.0 0.1 195732 5228 ? S 09:12 0:00 /usr/sbin/apache2 -k start
www-data 9948 0.0 0.1 195732 5228 ? S 09:12 0:00 /usr/sbin/apache2 -k start
www-data 9949 0.0 0.1 195732 5228 ? S 09:12 0:00 /usr/sbin/apache2 -k start
www-data 9950 0.0 0.1 195732 5228 ? S 09:12 0:00 /usr/sbin/apache2 -k start
www-data 9951 0.0 0.1 195732 5228 ? S 09:12 0:00 /usr/sbin/apache2 -k start
root 10047 0.0 0.0 0 0 ? S 09:16 0:00 [kworker/u8:1]
root 10095 0.0 0.0 18164 1268 pts/0 R+ 09:21 0:00 ps aux