Wednesday, November 30, 2016

compile and install nagios nrpe 2.15 on ubuntu 12.04 lts

 compile and install nagios nrpe 2.15 on ubuntu 12.04 lts  
   
 DISTRIB_ID=Ubuntu  
 DISTRIB_RELEASE=12.04  
 DISTRIB_CODENAME=precise  
 DISTRIB_DESCRIPTION="Ubuntu 12.04.3 LTS"  
   
 download and install gz'd code in /usr/local/src  
   
 add nagios user  
 # useradd -c "nagios system user" -d /usr/local/nagios -m nagios   
 # groupadd nagios   
 # chown nagios:nagios /usr/local/nagios  
    
 compile and install nrpe    
 # gunzip nrpe-2.15.tar.gz   
 # tar xvf nrpe-2.15.tar   
 # cd nrpe-2.15   
 # ./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib/x86_64-linux-gnu  
 # make && make install   
   
 /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/bin  
 /usr/bin/install -c -m 775 -o nagios -g nagios nrpe /usr/local/nagios/bin  
   
 # make install-daemon-config   
   
 /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc  
 /usr/bin/install -c -m 644 -o nagios -g nagios sample-config/nrpe.cfg /usr/local/nagios/etc  
   
 # gunzip nagios-plugins-1.4.16.tar.gz  
 # tar xvf nagios-plugins-1.4.16.tar  
 # cd nagios-plugins-1.4.16/  
 # ./configure --without-mysql  
 # make && make install  
   
 ...  
   
 * note  
   
 i'm hardcoding the libs for nrpe because  
 configure does this...  
   
 checking for type of socket size... size_t  
 checking for SSL headers... SSL headers found in /usr  
 checking for SSL libraries... configure: error: Cannot find ssl libraries  
   
 meh  
   
 # apt-get install libssl-dev  
 # ldconfing  
 # apt-file search libssl | grep libssl-dev  
   
 ...  
   
 set up the nrpe daemon  
 # echo 'nrpe 5666/tcp # NRPE' >> /etc/services   
 # cp /usr/local/src/nrpe-2.15/init-script.debian /etc/init.d/nrpe  
 # chmod +x /etc/init.d/nrpe  
 # sysv-rc-conf  
   
 set to runlevels 2 3 4 5  
 q to exit :^)  
   
 edit nrpe.cfg to site specs  
 # vi /usr/local/nagios/etc/nrpe.cfg  
   
 run nrpe daemon  
 # /etc/init.d/nrpe start  
   
 running?  
   
 # netstat -an |grep 5666  
 tcp    0   0 0.0.0.0:5666      0.0.0.0:*        LISTEN  
 tcp6    0   0 :::5666         :::*          LISTEN  
   
 check if npre is accessible. the rev show show up.   
 # /usr/local/nagios/libexec/check_nrpe -H localhost   
  NRPE v2.15   
    
make it easy on yourself with a script as opposed to copy/paste.
 useradd -c "nagios system user" -d /usr/local/nagios -m nagios ;  
 chown nagios:nagios /usr/local/nagios ;  
 mkdir -p /usr/local/src ;  
 cd /usr/local/src ;  
 scp you@somewhere:/dir/nrpe-2.15.tar.gz . ;  
 scp you@somewhere:/dir/nagios-plugins-1.4.16.tar.gz . ;  
 scp you@somewhere:/dir/templates/* . ;  
 gunzip nrpe-2.15.tar.gz ;  
 tar xvf nrpe-2.15.tar ;  
 gunzip nagios-plugins-1.4.16.tar.gz ;  
 tar xvf nagios-plugins-1.4.16.tar ;  
 cd nrpe-2.15 ;  
 ./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib/x86_64-linux-gnu ;  
 make && make install ;  
 make install-daemon-config ;  
 cd ../nagios-plugins-1.4.16 ;  
 ./configure --without-mysql ;  
 make && make install ;  
 cp /usr/local/src/nrpe.cfg /usr/local/nagios/etc/ ;  
 echo 'nrpe 5666/tcp # NRPE' >> /etc/services ;  
 cp /usr/local/src/nrpe-2.15/init-script.debian /etc/init.d/nrpe ;  
 chmod +x /etc/init.d/nrpe  
   
 common prereqs:  
   
 libssl-dev  
 apt-file  
 sysv-rc-conf  
   
 note:  
 if you see the make error in npre section (make will not tell you, you have to watch the process):  
 ./nrpe.c:269: undefined reference to `get_dh512'  
   
 a hint is when you rn /etc/init.d/nrpe and do not see the output:  
 Starting nagios remote plugin daemon: nrpe.  
   
 edit dh.h with C-code output if openssl is installed.  
 # openssl dhcparam -C 512 > /usr/local/src/nrpe-2.15/include/dh.h  
 and removing all between:  
 -----BEGIN DH PARAMETERS-----  
 -----END DH PARAMETERS-----  
   
 if running openssl comes up as not found,  
 apt-get install openssl  
   
   
 for ubuntu 10 and lower:  
 --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib   
   
 if you do not want to roll your own:  
 apt-get install nagios-nrpe-server  
 apt-get install nagios-plugins  
 apt-get install nagios-plugins-basic  
 apt-get install nagios-plugins-standard  
   
 all the conf stuff resides in:  
 /etc/nagios

...
a basic-o-rama template (npre.cfg):

#############################################################################
# NRPE Config File
# 
# Last Modified: TODAY!
#############################################################################


# LOG FACILITY
log_facility=daemon

# PID FILE
pid_file=/var/run/nrpe.pid

# PORT NUMBER
server_port=5666

# SERVER ADDRESS
#server_address=127.0.0.1

# NRPE USER
nrpe_user=nagios

# NRPE GROUP
nrpe_group=nagios

# ALLOWED HOST ADDRESSES
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
# losthost and monitoring servers
allowed_hosts=127.0.0.1,128.6.6.6,10.5.5.5

# COMMAND ARGUMENT PROCESSING
dont_blame_nrpe=0

# BASH COMMAND SUBTITUTION
allow_bash_command_substitution=0

# DEBUGGING OPTION
# Values: 0=debugging off, 1=debugging on
debug=0

# COMMAND TIMEOUT
command_timeout=60

# COMMAND DEFINITIONS
# The following examples use hardcoded command arguments...

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_root]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 600 -c 900

 
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