Centos 6 64bit 在 VPS 上全新安装，安装任何类型的包都只是尝试使用已经安装的 httpd。
my case:
[root@bucch ~]# service httpd status
httpd is stopped
[root@bucch ~]# service httpd start
Starting httpd: [ OK ]
[root@bucch ~]# service httpd status
httpd dead but pid file exists
[root@bucch ~]# rm -f /var/run/httpd/httpd.pid
[root@bucch ~]# service httpd status
httpd dead but subsys locked
[root@bucch ~]# rm -f /var/lock/subsys/httpd
[root@bucch ~]# service httpd status
httpd is stopped
[root@bucch ~]# tail -n 10 /var/log/httpd/error_log
[Fri Oct 07 11:38:47 2016] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Oct 07 11:38:47 2016] [notice] Digest: generating secret for digest authentication ...
[Fri Oct 07 11:38:47 2016] [notice] Digest: done
[Fri Oct 07 11:38:47 2016] [info] APR LDAP: Built with OpenLDAP LDAP SDK
[Fri Oct 07 11:38:47 2016] [info] LDAP: SSL support available
[Fri Oct 07 11:38:47 2016] [notice] Apache/2.2.15 (Unix) DAV/2 configured -- resuming normal operations
[Fri Oct 07 11:38:47 2016] [info] Server built: Jul 18 2016 15:24:00
[Fri Oct 07 11:38:47 2016] [debug] prefork.c(1028): AcceptMutex: sysvsem (default: sysvsem)
[Fri Oct 07 11:38:47 2016] [debug] proxy_util.c(1909): proxy: grabbed scoreboard slot 0 in child 4040 for worker proxy:reverse
[Fri Oct 07 11:38:47 2016] [debug] proxy_util.c(2025): proxy: initialized single connection worker 0 in child 4040 for (*)
在 /etc/httpd/conf/httpd.conf 中有以下指令：
PidFile /var/run/httpd/httpd.pid
并且在 /etc/sysconfig/httpd 中有以下内容：
PIDFILE=/var/run/httpd/httpd.pid
在 /etc/sysconfig/iptables 中有：
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
目录 /var/run/httpd 具有这种权限：
chmod a+rx
这是 netstat -plant 的输出，在启动 httpd 服务之前和之后相同
[root@bucch ~]# netstat -plant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 693/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1875/sendmail
tcp 0 64 212.8.250.64:22 x.x.x.x:49817 ESTABLISHED 3737/sshd
tcp 0 0 212.8.250.64:22 x.x.x.x:49167 ESTABLISHED 3143/sshd
tcp 0 0 212.8.250.64:22 x.x.x.x:46407 ESTABLISHED 4225/sshd
tcp 0 0 :::22 :::* LISTEN 693/sshd
[root@bucch ~]#
我要疯了！有什么建议吗？
我得到了一些信息
strace -f -o trace2.txt /etc/rc.d/init.d/httpd start
[root@bucch ~]# tail -n 100 trace2.txt
6699 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdefce27000
6699 arch_prctl(ARCH_SET_FS, 0x7fdefce28700) = 0
6699 mprotect(0x7fdefc670000, 4096, PROT_READ) = 0
6699 mprotect(0x7fdefca00000, 16384, PROT_READ) = 0
6699 mprotect(0x7fdefcc10000, 4096, PROT_READ) = 0
6699 mprotect(0x7fdefce31000, 4096, PROT_READ) = 0
6699 munmap(0x7fdefce2a000, 21145) = 0
6699 set_tid_address(0x7fdefce289d0) = 6699
6699 set_robust_list(0x7fdefce289e0, 24) = 0
6699 futex(0x7ffe5442baac, FUTEX_WAKE_PRIVATE, 1) = 0
6699 futex(0x7ffe5442baac, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 7fdefce28700) = -1 EAGAIN (Resource temporarily unavailable)
6699 rt_sigaction(SIGRTMIN, {0x7fdefc45ecb0, [], SA_RESTORER|SA_SIGINFO, 0x7fdefc4687e0}, NULL, 8) = 0
6699 rt_sigaction(SIGRT_1, {0x7fdefc45ed40, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7fdefc4687e0}, NULL, 8) = 0
6699 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
6699 getrlimit(RLIMIT_STACK, {rlim_cur=10240*1024, rlim_max=RLIM64_INFINITY}) = 0
6699 brk(0) = 0x12db000
6699 brk(0x12fc000) = 0x12fc000
6699 open("/var/lock/subsys/httpd", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, 0666 <unfinished ...>
6698 <... open resumed> ) = 8
6698 fcntl(8, F_GETFD) = 0x1 (flags FD_CLOEXEC)
6698 fcntl(8, F_SETFD, FD_CLOEXEC) = 0
6698 write(8, "6698\n", 5) = 5
6698 close(8) = 0
6698 semget(IPC_PRIVATE, 1, IPC_CREAT|0600) = 688130
6698 semctl(688130, 0, SETVAL, 0x1) = 0
6698 geteuid() = 0
6698 semctl(688130, 0, IPC_SET, 0x7ffe08648870) = 0
6698 mmap(NULL, 19224, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0) = 0x7fc5ac649000
6698 rt_sigaction(SIGSEGV, {0x7fc5ac687050, [], SA_RESTORER|SA_RESETHAND, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGBUS, {0x7fc5ac687050, [], SA_RESTORER|SA_RESETHAND, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGABRT, {0x7fc5ac687050, [], SA_RESTORER|SA_RESETHAND, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGILL, {0x7fc5ac687050, [], SA_RESTORER|SA_RESETHAND, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGFPE, {0x7fc5ac687050, [], SA_RESTORER|SA_RESETHAND, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGTERM, {0x7fc5ac691240, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGWINCH, {0x7fc5ac691240, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGINT, {0x7fc5ac691240, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGXCPU, {SIG_DFL, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGXFSZ, {SIG_IGN, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGPIPE, {SIG_IGN, [], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGHUP, {0x7fc5ac691270, [HUP USR1], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 rt_sigaction(SIGUSR1, {0x7fc5ac691270, [HUP USR1], SA_RESTORER, 0x7fc5aaf2f7e0}, NULL, 8) = 0
6698 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fc5ac641ab0) = 6700
6698 write(2, "[Fri Oct 07 20:31:44 2016] [noti"..., 104) = 104
6698 write(2, "[Fri Oct 07 20:31:44 2016] [info"..., 69) = 69
6698 write(2, "[Fri Oct 07 20:31:44 2016] [debu"..., 92) = 92
6698 wait4(-1, 0x7ffe086488ac, WNOHANG|WSTOPPED, NULL) = 0
6698 select(0, NULL, NULL, NULL, {1, 0} <unfinished ...>
6700 set_robust_list(0x7fc5ac641ac0, 24) = 0
6700 rt_sigaction(SIGHUP, {0x7fc5ac6920f0, [], SA_RESTORER|SA_INTERRUPT, 0x7fc5aaf2f7e0}, {0x7fc5ac691270, [HUP USR1], SA_RESTORER, 0x7fc5aaf2f7e0}, 8) = 0
6700 rt_sigaction(SIGTERM, {0x7fc5ac6920f0, [], SA_RESTORER|SA_INTERRUPT, 0x7fc5aaf2f7e0}, {0x7fc5ac691240, [], SA_RESTORER, 0x7fc5aaf2f7e0}, 8) = 0
6700 rt_sigaction(SIGINT, {SIG_IGN, [], SA_RESTORER|SA_INTERRUPT, 0x7fc5aaf2f7e0}, {0x7fc5ac691240, [], SA_RESTORER, 0x7fc5aaf2f7e0}, 8) = 0
6700 rt_sigaction(SIGUSR1, {0x7fc5ac691900, [], SA_RESTORER|SA_INTERRUPT, 0x7fc5aaf2f7e0}, {0x7fc5ac691270, [HUP USR1], SA_RESTORER, 0x7fc5aaf2f7e0}, 8) = 0
6700 geteuid() = 0
6700 setgid(48) = 0
6700 open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 8
6700 read(8, "65536\n", 31) = 6
6700 close(8) = 0
6700 open("/etc/group", O_RDONLY|O_CLOEXEC) = 8
6700 fstat(8, {st_mode=S_IFREG|0644, st_size=532, ...}) = 0
6700 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc5ac648000
6700 lseek(8, 0, SEEK_CUR) = 0
6700 read(8, "root:x:0:\nbin:x:1:bin,daemon\ndae"..., 4096) = 532
6700 read(8, "", 4096) = 0
6700 close(8) = 0
6700 munmap(0x7fc5ac648000, 4096) = 0
6700 setgroups(1, [48]) = 0
6700 geteuid() = 0
6700 setuid(48) = 0
6700 write(2, "[Fri Oct 07 20:31:44 2016] [debu"..., 127) = 127
6700 write(2, "[Fri Oct 07 20:31:45 2016] [debu"..., 123) = 123
6700 epoll_create1(EPOLL_CLOEXEC) = 8
6700 epoll_ctl(8, EPOLL_CTL_ADD, 3, {EPOLLIN, {u32=2915366168, u64=140487000651032}}) = 0
6700 accept4(3, <unfinished ...>
6699 <... open resumed> ) = 3
6699 dup2(3, 0) = 0
6699 close(3) = 0
6699 utimensat(0, NULL, NULL, 0) = 0
6699 close(0) = 0
6699 close(1) = 0
6699 close(2) = 0
6699 exit_group(0) = ?
6699 +++ exited with 0 +++
6690 <... wait4 resumed> [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 6699
6690 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
6690 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=6699, si_status=0, si_utime=0, si_stime=0} ---
6690 wait4(-1, 0x7ffd4819c31c, WNOHANG, NULL) = -1 ECHILD (No child processes)
6690 rt_sigreturn() = 0
6690 rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f8437653660}, {0x43d610, [], SA_RESTORER, 0x7f8437653660}, 8) = 0
6690 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
6690 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
6690 read(255, "\nexit $RETVAL\n", 3488) = 14
6690 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
6690 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
6690 exit_group(0) = ?
6690 +++ exited with 0 +++
6698 <... select resumed> ) = 0 (Timeout)
6698 wait4(-1, 0x7ffe086488ac, WNOHANG|WSTOPPED, NULL) = 0
6698 select(0, NULL, NULL, NULL, {1, 0} <unfinished ...>
6698 +++ killed by SIGKILL +++
6700 +++ killed by SIGKILL +++
答案1
向托管服务提供商发送了支持请求，两天后他们解决了这个问题。该工单已关闭，并显示以下消息： “您好，问题出在节点上，我们必须对节点内核进行更改。”
现在，使用相同的配置（和更多软件包），Apache 运行正常。无论如何，谢谢大家！
exit