monit 运行一小段时间后，我无法重新启动或停止 apache，它说存在冲突，其他东西使用了端口 80。Apache 仍然可以正常提供网页服务，当我使用 netstat -anp | grep 80 时，我仍然只看到 apache 在监听：80。
当我启动 monit 时，我收到 apache 的“未监控”错误。我不确定这是否与问题有关，我目前正在尝试解决此问题。
监控详情如下：
set httpd port 2812 and
#use address localhost # only accept connection from localhost
allow 0.0.0.0/0.0.0.0 # allow localhost to connect to the server and
allow *******:****** # require user '' with password ....
allow @monit # allow users of group 'monit' to connect (rw)
allow @users readonly # allow users of group 'users' to connect readonly
##monitor apache
check process apache with pidfile /var/run/httpd/httpd.pid
group apache
start program = "/etc/init.d/httpd start"
stop program = "/etc/init.d/httpd stop"
if failed host 127.0.0.1 port 80
protocol http then restart
if 5 restarts within 5 cycles then timeout
monit -vv 的输出
monit: Debug: Adding net allow '0.0.0.0/0.0.0.0'.
monit: Debug: Adding credentials for user '******'.
monit: Adding PAM group 'monit'.
monit: Adding PAM group 'users'.
Runtime constants:
Control file = /etc/monit.conf
Log file = /var/log/monit
Pid file = /var/run/monit.pid
Debug = True
Log = True
Use syslog = False
Is Daemon = True
Use process engine = True
Poll time = 60 seconds with start delay 0 seconds
Expect buffer = 256 bytes
Mail server(s) = smtp.sendgrid.net:587(ssl) with timeout 30 seconds
Mail from = ******
Mail subject = monit alert -- $EVENT $SERVICE
Mail message = $EVENT Service $SERV..(truncated)
Start monit httpd = True
httpd bind address = Any/All
httpd portnumber = 2812
httpd signature = True
Use ssl encryption = False
httpd auth. style = Basic Authentication and Host/Net allow list
Alert mail to = *******
Alert on = All events
The service list contains the following entries:
Process Name = apache
Group = apache
Pid file = /var/run/httpd/httpd.pid
Monitoring mode = active
Start program = '/etc/init.d/httpd start' timeout 30 second(s)
Stop program = '/etc/init.d/httpd stop' timeout 30 second(s)
Existence = if does not exist 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
Pid = if changed 1 times within 1 cycle(s) then alert
Ppid = if changed 1 times within 1 cycle(s) then alert
Port = if failed 127.0.0.1:80 [HTTP via TCP] with timeout 5 seconds 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
Timeout = If restarted 5 times within 5 cycle(s) then unmonitor
Process Name = mysqld
Group = mysql
Pid file = /var/run/mysqld/mysqld.pid
Monitoring mode = active
Start program = '/etc/init.d/mysqld start' timeout 30 second(s)
Stop program = '/etc/init.d/mysqld stop' timeout 30 second(s)
Existence = if does not exist 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
Pid = if changed 1 times within 1 cycle(s) then alert
Ppid = if changed 1 times within 1 cycle(s) then alert
Port = if failed 127.0.0.1:3306 [DEFAULT via TCP] with timeout 5 seconds 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert
Timeout = If restarted 5 times within 5 cycle(s) then unmonitor
System Name = system_ip-10-74-144-130.eu-west-1.compute.internal
Monitoring mode = active
答案1
无法连接的问题可能是因为重启过程没有正确终止 httpd，因此它实际上从未关闭，这就是为什么您会收到有关端口 80 正在使用的错误。我还怀疑 Pid 可能会发生变化，因为在启动或重新启动 httpd 时它会发生变化。日志应该会提供有关失败原因的更多信息。
但是，httpd 通常作为守护进程很稳定，我不会强制 monit 重新启动它，除非您处于危急状态，否则只会发出警报。