Nagios nrpe on Remote host
Atul Kamat
atulk at world2web.com
Tue Oct 5 07:31:12 CEST 2004
Hi Vincent,
I`m stuck with the same error....i tried recompiling nrpe and
reinstalling nagios-plugins from source on the remote machine but to no
avail.Followed all the things u mentioned very closely.
The error when i run the command "/usr/local/nagios/libexec/check_nrpe -H
nyx -n -c check_ssh -a nyx" is
CHECK_NRPE: Error receiving data from daemon.
In the nagios interface i get "(No output returned from plugin)"
Regards
Atul Kamat
Linux Network Engineer,
World2Web Soft Technologies Private Ltd,
26, Koramangala Industrial Layout,
Bangalore - 560095,
INDIA
Phone :98860 24705
e-mail: atulk at world2web.com
> Atul,
> I guess you should use:
> /usr/local/nagios/libexec/check_nrpe -H nyx -n -c check_ssh -a nyx
>
> To pass arguments, NRPE should be compiled with correct option
> (--enable-command-args), your nrpe conf file should have
> "dont_blame_nrpe=1", and your nrpe.conf shoud have this line:
> command[check_ssh]=/usr/local/nagios/libexec/check_ssh $ARG1$
>
> In your checkcommands.cfg, you can use:
>
> define command {
> command_name check_nrpe
> command_line $USER1$/check_nrpe -n -t 10 -H
> $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$ $ARG4$
> }
>
> Regards,
>
> Vincent Alloo
> TI France Design Systems Operations Manager
> Europe and Middle East IT Services
> Texas Instruments France
>
> E-Mail: v-alloo at ti.com
> Phone: +33 4 93 22 26 97
> Mobile: +33 6 82 13 00 80
>
>> -----Original Message-----
>> From: Atul Kamat [mailto:atulk at world2web.com]
>> Sent: Thursday, September 30, 2004 12:49 PM
>> To: Alloo, Vincent
>> Cc: atulk at world2web.com; nagios-users at lists.sourceforge.net
>> Subject: RE: [Nagios-users] Nagios nrpe on Remote host
>>
>> Hi Vincent!
>>
>> The xinetd -nrpe file was exactly the same..so i tried running nrpe as
> a
>> daemon..tried telnetting from the nagios host inot the remote machine
> and
>> it was successful after i fixed the nrpe.cfg file .
>> Now my nagios web interface gives the following error
>>
>> CHECK_NRPE: Error receiving data from daemon.
>>
>> if i try to run check_nrpe from the command prompt with something like
>>
>> /usr/local/nagios/libexec/check_nrpe -H nyx -n
>> /usr/local/nagios/libexec/check_ssh -H nyx
>>
>> i get the same error.
>>
>> Help wanted!!
>>
>> Atul Kamat
>> Linux Network Engineer,
>> World2Web Soft Technologies Private Ltd,
>> 26, Koramangala Industrial Layout,
>> Bangalore - 560095,
>> INDIA
>> Phone :98860 24705
>> e-mail: atulk at world2web.com
>> > Atul,
>> > I don't know if it can help, but here my nrpe xinetd conf:
>> >
>> > % cat /etc/xinetd.d/nrpe
>> > # default: on
>> > # description: The rshd server is the server for the rcmd(3) routine
>> > and, \
>> > # consequently, for the rsh(1) program. The server provides \
>> > # remote execution facilities with authentication based on \
>> > # privileged port numbers from trusted hosts.
>> > service nrpe
>> > {
>> > flags = REUSE
>> > disable = no
>> > socket_type = stream
>> > wait = no
>> > user = nagios
>> > log_on_failure += USERID
>> > server = /apps/nagios/nrpe/nrpe
>> > server_args = -c /db/sysadmin/nagios/nrpe.cfg
>> > --inetd
>> > }
>> >
>> > Regards,
>> >
>> > Vincent Alloo
>> > TI France Design Systems Operations Manager
>> > Europe and Middle East IT Services
>> > Texas Instruments France
>> >
>> > E-Mail: v-alloo at ti.com
>> > Phone: +33 4 93 22 26 97
>> > Mobile: +33 6 82 13 00 80
>> >> -----Original Message-----
>> >> From: Atul Kamat [mailto:atulk at world2web.com]
>> >> Sent: Wednesday, September 29, 2004 2:15 PM
>> >> To: Alloo, Vincent
>> >> Cc: nagios-users at lists.sourceforge.net
>> >> Subject: RE: [Nagios-users] Nagios nrpe on Remote host
>> >>
>> >> Hi Vincent!
>> >>
>> >> I made the change as u per your advice . But i`ve got a feeling
> that
>> > the
>> >> preoblem is with the xinetd configuration on the remote host.if i
>> > check
>> >> the /var/log/messages i get the following error:
>> >>
>> >> Sep 29 17:32:44 phoenix nagios: SERVICE NOTIFICATION:
>> > Atul;nyx;/dev/hda1
>> >> Free Space;CRITICAL;notify-by-epager;Connection refused by host
>> >> Sep 29 17:32:44 phoenix nagios: SERVICE NOTIFICATION:
>> > Atul;nyx;/dev/hda1
>> >> Free Space;CRITICAL;notify-by-email;Connection refused by host
>> >>
>> >> The following is what`s in the /etc/xinetd.d/nrpe file
>> >>
>> >> # default:on
>> >> # description:NRPE
>> >> service nrpe
>> >> {
>> >> flags = REUSE
>> >> socket_type= stream
>> >> wait = no
>> >> user = nagios
>> >> server = /usr/local/nagios/nrpe
>> >> server_args = -i /usr/local/nagios/nrpe.cfg
>> >> log_on_failure+=USERID
>> >> disable = no
>> >> }
>> >> I also tried changing the user to root...but that didnt help
>> > either.The
>> >> user nagios exists on the machine
>> >>
>> >> I havent made ne changes to the nrpe.cfg file except enabled
> debugging
>> > .
>> >> Shud i make ne changed to the nrpe.cfg file??
>> >>
>> >> the following are the excerpts of the nrpe.cfg file on the remote
> host
>> >> # ALLOWED HOST ADDRESSES
>> >> # This is a comma-delimited list of IP address of hosts that are
>> > allowed
>> >> # to talk to the NRPE daemon.
>> >> #
>> >> # NOTE: The daemon only does rudimentary checking of the client's
> IP
>> >> # address. I would highly recommend adding entries in your
>> >> # /etc/hosts.allow file to allow only the specified host to
> connect
>> >> # to the port you are running this daemon on.
>> >> #
>> >> # NOTE: This option is ignored if NRPE is running under either
> inetd
>> > or
>> >> xinetd
>> >>
>> >> allowed_hosts=127.0.0.1
>> >>
>> >> does this thing have nething to do with the problem ..
>> >> Please Advice
>> >>
>> >> Atul Kamat
>> >> Linux Network Engineer,
>> >> World2Web Soft Technologies Private Ltd,
>> >> 26, Koramangala Industrial Layout,
>> >> Bangalore - 560095,
>> >> INDIA
>> >> Phone :98860 24705
>> >> e-mail: atulk at world2web.com
>> >>
>> >>
>> >> > You should use:
>> >> > define command{
>> >> > command_name check_nrpe
>> >> > command_line /usr/local/nagios/libexec/check_nrpe -H
>> >> > $HOSTADDRESS$ -c $ARG1$
>> >> > }
>> >> >
>> >> > Notice the -H ...
>> >> >
>> >> > Regards,
>> >> >
>> >> > Vincent Alloo
>> >> > TI France Design Systems Operations Manager
>> >>
>> >> > Europe and Middle East IT Services
>> >> > Texas Instruments France
>> >> >
>> >> > E-Mail: v-alloo at ti.com
>> >> > Phone: +33 4 93 22 26 97
>> >> > Mobile: +33 6 82 13 00 80
>> >> >> -----Original Message-----
>> >> >> From: nagios-users-admin at lists.sourceforge.net
>> > [mailto:nagios-users-
>> >> admin at lists.sourceforge.net] On Behalf Of Atul Kamat
>> >> >> Sent: Wednesday, September 29, 2004 7:57 AM
>> >> >> To: nagios-users at lists.sourceforge.net
>> >> >> Subject: [Nagios-users] Nagios nrpe on Remote host
>> >> >> Hi!
>> >> >> I installed and configured nagios to monitor our servers and
> it
>> > took
>> >> > me
>> >> >> a whole day thanx to an error in the documentation.
>> >> >> I installed a utility called NRPE so that i cud execute
> commands
>> > on
>> >> >> remote machine.i setup xinetd and installed the plugins on the
>> > remote
>> >> host as well.Below are the excerpts of the:::
>> >> >> services.cfg file:
>> >> >> define service{
>> >> >> use generic-service
> ; Name
>> >> > of service
>> >> >> template to use
>> >> >> host_name nyx
>> >> >> service_description /dev/hda1 Free Space
>> >> >> is_volatile 0
>> >> >> check_period 24x7
>> >> >> max_check_attempts 3
>> >> >> normal_check_interval 5
>> >> >> retry_check_interval 1
>> >> >> contact_groups linux-admins
>> >> >> notification_interval 120
>> >> >> notification_period 24x7
>> >> >> notification_options w,u,c,r
>> >> >> check_command check_nrpe!check_disk1
>> >> >> }
>> >> >> checkcommands.cfg file::
>> >> >> define command{
>> >> >> command_name check_nrpe
>> >> >> command_line usr/local/nagios/libexec/check_nrpe
>> >> > $HOSTADDRESS$
>> >> >> -c $ARG1$
>> >> >> }
>> >> >> nrpe.cfg file on the remote machine::
>> >> >> #command i want to execute
>> >> >> command[check_disk1]=/usr/local/nagios/libexec/check_disk -w 20
> -c
>> > 10
>> >> > -p
>> >> >> /dev/hda1
>> >> >> could neone tell me what`s going wrong.
>> >> >> Nagios display the disk space data of the local machine rather
> than
>> >> > the
>> >> >> remote machine.
>> >> >> Thanx,
>> >> >> Warm Regards
>> >> >> Atul Kamat
>> >> >> Linux Network Engineer,
>> >> >> World2Web Soft Technologies Private Ltd,
>> >> >> 26, Koramangala Industrial Layout,
>> >> >> Bangalore - 560095,
>> >> >> INDIA
>> >> >> Phone :98860 24705
>> >> >> e-mail: atulk at world2web.com
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