############################################################################### ## Monit control file ############################################################################### ## ## Comments begin with a '#' and extend through the end of the line. Keywords ## are case insensitive. All path's MUST BE FULLY QUALIFIED, starting with '/'. ## ## Below you will find examples of some frequently used statements. For ## information about the control file and a complete list of statements and ## options, please have a look in the Monit manual. ## ## ############################################################################### ## Global section ############################################################################### ## ## Start Monit in the background (run as a daemon): # set daemon 30 # check services at 30 seconds intervals # with start delay 240 # optional: delay the first check by 4-minutes (by # # default Monit check immediately after Monit start) # # ## Set syslog logging. If you want to log to a standalone log file instead, ## specify the full path to the log file # set log syslog # # ## Set the location of the Monit lock file which stores the process id of the ## running Monit instance. By default this file is stored in $HOME/.monit.pid # # set pidfile /var/run/monit.pid # ## Set the location of the Monit id file which stores the unique id for the ## Monit instance. The id is generated and stored on first Monit start. By ## default the file is placed in $HOME/.monit.id. # # set idfile /var/.monit.id # ## Set the location of the Monit state file which saves monitoring states ## on each cycle. By default the file is placed in $HOME/.monit.state. If ## the state file is stored on a persistent filesystem, Monit will recover ## the monitoring state across reboots. If it is on temporary filesystem, the ## state will be lost on reboot which may be convenient in some situations. # # set statefile /var/.monit.state # # ## Set limits for various tests. The following example shows the default values: ## # set limits { # programOutput: 512 B, # check program's output truncate limit # sendExpectBuffer: 256 B, # limit for send/expect protocol test # fileContentBuffer: 512 B, # limit for file content test # httpContentBuffer: 1 MB, # limit for HTTP content test # networkTimeout: 5 seconds # timeout for network I/O # programTimeout: 300 seconds # timeout for check program # stopTimeout: 30 seconds # timeout for service stop # startTimeout: 30 seconds # timeout for service start # restartTimeout: 30 seconds # timeout for service restart # } ## Set global SSL options (just most common options showed, see manual for ## full list). # # set ssl { # verify : enable, # verify SSL certificates (disabled by default but STRONGLY RECOMMENDED) # selfsigned : allow # allow self signed SSL certificates (reject by default) # } # # ## Set the list of mail servers for alert delivery. Multiple servers may be ## specified using a comma separator. If the first mail server fails, Monit # will use the second mail server in the list and so on. By default Monit uses # port 25 - it is possible to override this with the PORT option. # # set mailserver mail.bar.baz, # primary mailserver # backup.bar.baz port 10025, # backup mailserver on port 10025 # localhost # fallback relay # # ## By default Monit will drop alert events if no mail servers are available. ## If you want to keep the alerts for later delivery retry, you can use the ## EVENTQUEUE statement. The base directory where undelivered alerts will be ## stored is specified by the BASEDIR option. You can limit the queue size ## by using the SLOTS option (if omitted, the queue is limited by space ## available in the back end filesystem). # # set eventqueue # basedir /var/monit # set the base directory where events will be stored # slots 100 # optionally limit the queue size # # ## Send status and events to M/Monit (for more informations about M/Monit ## see https://mmonit.com/). By default Monit registers credentials with ## M/Monit so M/Monit can smoothly communicate back to Monit and you don't ## have to register Monit credentials manually in M/Monit. It is possible to ## disable credential registration using the commented out option below. ## Though, if safety is a concern we recommend instead using https when ## communicating with M/Monit and send credentials encrypted. The password ## should be URL encoded if it contains URL-significant characters like ## ":", "?", "@". Default timeout is 5 seconds, you can customize it by ## adding the timeout option. # # set mmonit http://monit:monit@192.168.1.10:8080/collector # # with timeout 30 seconds # Default timeout is 5 seconds # # and register without credentials # Don't register credentials # # ## Monit by default uses the following format for alerts if the mail-format ## statement is missing:: ## --8<-- ## set mail-format { ## from: Monit ## subject: monit alert -- $EVENT $SERVICE ## message: $EVENT Service $SERVICE ## Date: $DATE ## Action: $ACTION ## Host: $HOST ## Description: $DESCRIPTION ## ## Your faithful employee, ## Monit ## } ## --8<-- ## ## You can override this message format or parts of it, such as subject ## or sender using the MAIL-FORMAT statement. Macros such as $DATE, etc. ## are expanded at runtime. For example, to override the sender, use: # # set mail-format { from: monit@foo.bar } # # ## You can set alert recipients whom will receive alerts if/when a ## service defined in this file has errors. Alerts may be restricted on ## events by using a filter as in the second example below. # # set alert sysadm@foo.bar # receive all alerts # ## Do not alert when Monit starts, stops or performs a user initiated action. ## This filter is recommended to avoid getting alerts for trivial cases. # # set alert your-name@your.domain not on { instance, action } # # ## Monit has an embedded HTTP interface which can be used to view status of ## services monitored and manage services from a web interface. The HTTP ## interface is also required if you want to issue Monit commands from the ## command line, such as 'monit status' or 'monit restart service' The reason ## for this is that the Monit client uses the HTTP interface to send these ## commands to a running Monit daemon. See the Monit Wiki if you want to ## enable SSL for the HTTP interface. # set httpd port 2812 and # use address localhost # only accept connection from localhost # allow localhost # allow localhost to connect to the server and allow admin:monit # require user 'admin' with password 'monit' #with ssl { # enable SSL/TLS and set path to server certificate # pemfile: /etc/ssl/certs/monit.pem #} ############################################################################### ## Services ############################################################################### ## ## Check general system resources such as load average, cpu and memory ## usage. Each test specifies a resource, conditions and the action to be ## performed should a test fail. # # check system $HOST # if loadavg (1min) > 4 then alert # if loadavg (5min) > 2 then alert # if cpu usage > 95% for 10 cycles then alert # if memory usage > 75% then alert # if swap usage > 25% then alert # # ## Check if a file exists, checksum, permissions, uid and gid. In addition ## to alert recipients in the global section, customized alert can be sent to ## additional recipients by specifying a local alert handler. The service may ## be grouped using the GROUP option. More than one group can be specified by ## repeating the 'group name' statement. # # check file apache_bin with path /usr/local/apache/bin/httpd # if failed checksum and # expect the sum 8f7f419955cefa0b33a2ba316cba3659 then unmonitor # if failed permission 755 then unmonitor # if failed uid "root" then unmonitor # if failed gid "root" then unmonitor # alert security@foo.bar on { # checksum, permission, uid, gid, unmonitor # } with the mail-format { subject: Alarm! } # group server # # ## Check that a process is running, in this case Apache, and that it respond ## to HTTP and HTTPS requests. Check its resource usage such as cpu and memory, ## and number of children. If the process is not running, Monit will restart ## it by default. In case the service is restarted very often and the ## problem remains, it is possible to disable monitoring using the TIMEOUT ## statement. This service depends on another service (apache_bin) which ## is defined above. # # check process apache with pidfile /usr/local/apache/logs/httpd.pid # start program = "/etc/init.d/httpd start" with timeout 60 seconds # stop program = "/etc/init.d/httpd stop" # if cpu > 60% for 2 cycles then alert # if cpu > 80% for 5 cycles then restart # if totalmem > 200.0 MB for 5 cycles then restart # if children > 250 then restart # if loadavg(5min) greater than 10 for 8 cycles then stop # if disk read > 500 kb/s for 10 cycles then alert # if disk write > 500 kb/s for 10 cycles then alert # if failed host www.tildeslash.com port 80 protocol http and request "/somefile.html" then restart # if failed port 443 protocol https with timeout 15 seconds then restart # if 3 restarts within 5 cycles then unmonitor # depends on apache_bin # group server # # ## Check filesystem permissions, uid, gid, space usage, inode usage and disk I/O. ## Other services, such as databases, may depend on this resource and an automatically ## graceful stop may be cascaded to them before the filesystem will become full and data ## lost. # # check filesystem datafs with path /dev/sdb1 # start program = "/bin/mount /data" # stop program = "/bin/umount /data" # if failed permission 660 then unmonitor # if failed uid "root" then unmonitor # if failed gid "disk" then unmonitor # if space usage > 80% for 5 times within 15 cycles then alert # if space usage > 99% then stop # if inode usage > 30000 then alert # if inode usage > 99% then stop # if read rate > 1 MB/s for 5 cycles then alert # if read rate > 500 operations/s for 5 cycles then alert # if write rate > 1 MB/s for 5 cycles then alert # if write rate > 500 operations/s for 5 cycles then alert # if service time > 10 milliseconds for 3 times within 5 cycles then alert # group server # # ## Check a file's timestamp. In this example, we test if a file is older ## than 15 minutes and assume something is wrong if its not updated. Also, ## if the file size exceed a given limit, execute a script # # check file database with path /data/mydatabase.db # if failed permission 700 then alert # if failed uid "data" then alert # if failed gid "data" then alert # if timestamp > 15 minutes then alert # if size > 100 MB then exec "/my/cleanup/script" as uid dba and gid dba # # ## Check directory permission, uid and gid. An event is triggered if the ## directory does not belong to the user with uid 0 and gid 0. In addition, ## the permissions have to match the octal description of 755 (see chmod(1)). # # check directory bin with path /bin # if failed permission 755 then unmonitor # if failed uid 0 then unmonitor # if failed gid 0 then unmonitor # # ## Check a remote host availability by issuing a ping test and check the ## content of a response from a web server. Up to three pings are sent and ## connection to a port and an application level network check is performed. # # check host myserver with address 192.168.1.1 # if failed ping then alert # if failed port 3306 protocol mysql with timeout 15 seconds then alert # if failed port 80 protocol http # and request /some/path with content = "a string" # then alert # # ## Check a network link status (up/down), link capacity changes, saturation ## and bandwidth usage. # # check network public with interface eth0 # if failed link then alert # if changed link then alert # if saturation > 90% then alert # if download > 10 MB/s then alert # if total uploaded > 1 GB in last hour then alert # # ## Check custom program status output. # # check program myscript with path /usr/local/bin/myscript.sh # if status != 0 then alert # # ############################################################################### ## Includes ############################################################################### ## ## It is possible to include additional configuration parts from other files or ## directories. # # include /etc/monit.d/* #