Nagios Monitor Nginx

Nagios Monitor Nginx

Open Firewall 161 port

252.10760.195.252.110

Iptables-i input-p udp-s 60.195.252.107–dport 161-j ACCEPT

Iptables-i input-p udp-s 60.195.252.110–dport 161-j ACCEPT

2012-03-21 23:07:38| Category: monitoring | reporting | font size subscription

1. Perform operation on the controlled side: put the Check_nginx plugin into the/usr/local/nagios/libexec, and authorize the host and the group to be Nagios (this is critical)

[email protected] libexec]# ll Check_nginx

-rwxr-xr-x 1 nagios nagios 7636 Oct 22:48 Check_nginx

2.vi/usr/local/nagios/etc/nrpe.cfg

Add this line: Command[check_nginx]=/usr/local/nagios/libexec/check_nginx-w 15000-c 20000

3. Restart Nrpe:

Killall-9 Nrpe

/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-d

4. The controlled side performs the operation test:

[Email protected] libexec]#/check_nginx-h 192.168.0.100-p 80-p/var/run/-n nginx.pid-s nginx_status-o/tmp/-W 15 000-c 20000

Ok-nginx is running. 1 requests per second, 1 connections per second (1.00 requests per connection) | ' Reqpsec ' =1 ' conpsec ' =1 ' conpreq ' = 1.00]

--------------------------------------------------------------------------------------------------------------- -----------------------------------

Following the Nagios server side operation:

1.vi/usr/local/nagios/etc/objects/service.cfg

Add to:

Define Service{

Use Generic-service

HOST_NAME nagios-server,nagios-client

Service_description Check_nginx

Check_command Check_nrpe!check_nginx

Max_check_attempts 3

Normal_check_interval 3

Retry_check_interval 3

Check_period 24x7

Notification_interval 5

Notification_period 24x7

Notification_options W,u,c,r

Contact_groups Admins

Process_perf_data 1

action_url/nagios/pnp/index.php?host= $HOSTNAME $&srv= $SERVICEDESC $

}

Once added, save to exit and restart Nagios.

/etc/init.d/nagios relaod

/etc/init.d/nagios restart

2. Test:/usr/local/nagios/libexec/check_nrpe-h 192.168.0.100-c Check_nginx

Ok-nginx is running. 1 requests per second, 1 connections per second (1.00 requests per connection) | ' Reqpsec ' =1 ' conpsec ' =1 ' conpreq ' = 1.00]

#---------------------192.168.0.100 is the IP address of my accused side------------------------------------------------------

Here are some areas of attention

1, about Nginx.pid

--in nginx.conf must be added, such as: Pid/opt/nginx.pid

2. If the following prompt appears.

--unknown-local copy/copies of Nginx_status is empty.

--it may be that there is no configuration status monitoring in your nginx.conf, such as

Server

{

Listen 80;

server_name IP | Domain Name

Location/nginx_status {

Stub_status on;

Access_log off;

}

}

3. Need to change check_nginx a place:

Change hostname= "localhost" to: the host IP you need to monitor.

such as: Hostname= "192.168.0.100"

Check_nginx Script

#!/bin/sh

Progname= ' basename

Version= "Version 1.0,"

Author= ", Mike adolphs (http://www.matejunkie.com/)"

St_ok=0

St_wr=1

st_cr=2

St_uk=3

Hostname= "192.168.0.100"

Port=80

Path_pid=/var/run

Name_pid= "Nginx.pid"

Status_page= "Nginx_status"

Output_dir=/tmp

Pid_check=1

Secure=0

Print_version () {

echo "$VERSION $AUTHOR"

}

Print_help () {

Print_version $PROGNAME $VERSION

echo ""

echo "$PROGNAME is a Nagios plugin to check whether Nginx is running."

echo "It also parses the Nginx ' s status page to get requests and"

echo "Connections per second as well as requests per connection. You "

echo "May has to alter your nginx config so, the plugin"

echo "can access the server's status page."

echo "The plugin is highly configurable for this reason. See below for "

echo "available options."

echo ""

echo "$PROGNAME-H localhost-p 80-p/var/run-n nginx.pid"

echo "-s NGINX_STATUT-O/tmp [-W int] [-c int] [-S] [-n]"

echo ""

echo "Options:"

echo "-h/--hostname)"

echo "defines the hostname. Default Is:localhost "

echo "-p/--port)"

echo "defines the port. Default is:80 "

echo "-p/--path-pid)"

echo "Path where Nginx ' s PID file is being stored. You might need "

echo "to alter this path according to your distribution. Default "

echo "is:/var/run"

echo "-n/--name_pid)"

echo "Name of the PID file. Default Is:nginx.pid "

echo "-n/--no-pid-check)"

echo "Turn this on, if you don ' t want to check for a PID file"

echo "Whether Nginx is running, e.g. if you ' re checking a"

echo "Remote server. Default Is:off "

echo "-s/--status-page)"

echo "Name of the server ' s status page defined in the"

echo "directive of your nginx configuration. Default is: "

echo "Nginx_status"

echo "-o/--output-directory)"

echo "specifies where to write the tmp-file that the check creates."

echo "Default is:/tmp"

echo "-s/--secure)"

echo "In case your server was only reachable via SSL, use this"

echo "This switch to use HTTPS instead of HTTP. Default Is:off "

echo "-w/--warning)"

echo "Sets a warning level for requests per second. Default Is:off "

echo "-c/--critical)"

echo "Sets a critical level for requests per second. Default is: "

echo "Off"

Exit $ST _uk

}

While Test-n "$"; Do

Case "$" in

-HELP|-H)

Print_help

Exit $ST _uk

;;

--VERSION|-V)

Print_version $PROGNAME $VERSION

Exit $ST _uk

;;

--HOSTNAME|-H)

Hostname=$2

Shift

;;

--PORT|-P)

Port=$2

Shift

;;

--PATH-PID|-P)

Path_pid=$2

Shift

;;

--NAME-PID|-N)

Name_pid=$2

Shift

;;

--NO-PID-CHECK|-N)

Pid_check=0

;;

--STATUS-PAGE|-S)

Status_page=$2

Shift

;;

--output-directory|-o)

Output_dir=$2

Shift

;;

--SECURE|-S)

Secure=1

;;

--WARNING|-W)

Warning=$2

Shift

;;

--CRITICAL|-C)

Critical=$2

Shift

;;

*)

echo "Unknown argument: $ $"

Print_help

Exit $ST _uk

;;

Esac

Shift

Done

Get_wcdiff () {

if [!-Z "$warning"-A!-Z "$critical"]

Then

Wclvls=1

If [${warning}-gt ${critical}]

Then

Wcdiff=1

Fi

elif [!-Z "$warning"-a-z "$critical"]

Then

wcdiff=2

elif [-Z "$warning"-A!-Z "$critical"]

Then

Wcdiff=3

Fi

}

Val_wcdiff () {

If ["$wcdiff" = 1]

Then

echo "Please adjust your warning/critical thresholds. The warning \

Must be lower than the critical level! "

Exit $ST _uk

elif ["$wcdiff" = 2]

Then

echo "also set a critical value when you want

Warning/critical thresholds! "

Exit $ST _uk

elif ["$wcdiff" = 3]

Then

echo "also set a warning value when you want

Warning/critical thresholds! "

Exit $ST _uk

Fi

}

Check_pid () {

If [-F ' $path _pid/$name _pid "]

Then

Retval=0

Else

Retval=1

Fi

}

Get_status () {

If ["$secure" = 1]

Then

wget--no-check-certificate-q-T 3-t 3 \

Http://${hostname}:${port}/${status_page}-o ${output_dir}/nginx-status.1

Sleep 1

wget--no-check-certificate-q-T 3-t 3 \

Http://${hostname}:${port}/${status_page}-o ${output_dir}/nginx-status.2

Else

Wget-q-T 3-t 3 http://${hostname}:${port}/${status_page} \

-O ${output_dir}/nginx-status.1

Sleep 1

Wget-q-T 3-t 3 http://${hostname}:${port}/${status_page} \

-O ${output_dir}/nginx-status.2

Fi

Stat_output1= ' stat-c%s ${output_dir}/nginx-status.1 '

Stat_output2= ' stat-c%s ${output_dir}/nginx-status.2 '

If ["$stat _output1" = 0-o "$stat _output2" = 0]

Then

echo "Unknown-local copy/copies of $status _page is empty."

Exit $ST _uk

Fi

}

Get_vals () {

Tmp1_reqpsec= ' grep ' ^ ' ${output_dir}/nginx-status.1|awk ' {print $} '

Tmp2_reqpsec= ' grep ' ^ ' ${output_dir}/nginx-status.2|awk ' {print $} '

reqpsec= ' expr $tmp 2_reqpsec-$tmp 1_reqpsec '

Tmp1_conpsec= ' grep ' ^ ' ${output_dir}/nginx-status.1|awk ' {print $} '

Tmp2_conpsec= ' grep ' ^ ' ${output_dir}/nginx-status.2|awk ' {print $} '

conpsec= ' expr $tmp 2_conpsec-$tmp 1_conpsec '

Reqpcon= ' echo ' scale=2; $reqpsec/$conpsec "| Bc-l '

If ["$reqpcon" = ". 99"]

Then

reqpcon= "1.00"

Fi

}

Do_output () {

Output= "Nginx is running. $reqpsec Requests per second, $conpsec \

Connections per second ($reqpcon requests per connection) "

}

Do_perfdata () {

Perfdata= "' reqpsec ' = $reqpsec ' conpsec ' = $conpsec ' conpreq ' = $reqpcon"

}

# Here we go!

Get_wcdiff

Val_wcdiff

if [${pid_check} = 1]

Then

Check_pid

If ["$retval" = 1]

Then

echo "There ' s no PID file for Nginx. is Nginx running? Please \

Also make sure whether your PID path and name are correct. "

Exit $ST _CR

Fi

Fi

Get_status

Get_vals

Do_output

Do_perfdata

If [-N "$warning"-a-n "$critical"]

Then

If ["$reqpsec"-ge "$warning"-A "$reqpsec"-lt "$critical"]

Then

echo "WARNING-${output} | ${perfdata} "

Exit $ST _WR

elif ["$reqpsec"-ge "$critical"]

Then

echo "CRITICAL-${output} | ${perfdata} "

Exit $ST _CR

Else

echo "OK-${output} | ${perfdata}] "

Exit $ST _OK

Fi

Else

echo "OK-${output} | ${perfdata} "

Exit $ST _OK

Fi

Nagios Monitor Nginx